RCABC Roofing Practices Manual - User contributions [en]

(Draft) ASM Roof Systems Standard

2026-06-22T22:36:03Z

James Klassen: /* 9.3.2.4. Panel Securement and Seams */

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<big><big>Division B - Standards</big></big> 
<big>Water-shedding Roof Systems: Metals</big> 
<hr>
<big><big><big><big><big>RGC Standard for Architectural Sheet Metal (ASM) Roofs</big></big></big></big></big>
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<div class="panel-heading"><big>'''About the Standard'''</big></div>
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{{hilite | This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for Architectural Metal Roofing (Tab 8). It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''', '''''RoofStar 10-Year Guarantee''''' or '''''RoofStar 15-year Guarantee'''''. Requirements to qualify for a '''''RoofStar 15-Year Guarantee''''' are listed in each relevant Part under Section 1. All '''''RoofStar 15-Year Guarantee''''' requirements must be read together with the General Requirements for each Part in this Standard. || 2020-July-3 }}

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. {{hilite |Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.|| 2021-February-7 }}

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the {{hilite | hyperlinks embedded || 2020-July-3 }} in the body of text.

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:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Roof Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Eave, Valley, and Field Underlayment]]
|-
| [[#PART_9 | Part 9 - Roof Field (Panel Systems)]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - The Roof as a Platform]]
|-
| <hr>
|-
| [[Notes to ASM Standard | Notes to Standard]]
|-
|}

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'''First Edition''': June 14, 2018
 '''Previous Edition''': June 12, 2025
 '''Current Edition''': Adopted January 20, 2026
 
All changes to this Standard are effective <big>'''February 1, 2026'''</big>
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<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>{{hilite | ''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''|| 2027-June-11 }}.
{{strike| {{hilite |''Finished roof system surface''|| 2020-February-3 }} {{hilite | means the top surface of any ''roof system'', inclusive of ballast or ''overburden''|| 2021-February-7 }}. || 2026-June-11 }}
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>{{hilite | ''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''|| 2027-June-11 }}.
{{strike| {{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.|| 2026-June-11 }}
<li>{{hilite | ''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''. || 2023-June-16 }}
<li>{{hilite | ''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy || 2025-October-25 }}.
<li>{{hilite | ''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure|| 2027-June-11 }}.
{{strike| ''Waterproofing roof system'' means an insulated or uninsulated ''roof system'', designed and constructed on roofs using a sheet or liquid-applied membrane, to exclude water. This type of ''system'' typically is installed on roof slopes less than 1:4 (3” in 12”). || 2026-June-11 }}
<li>''Water-shedding roof system'' means an insulated or uninsulated ''roof system'', designed and constructed to shed water away from a structure, not to waterproof it. This type of ''system'' typically is installed on roof slopes greater than 1:4 (3” in 12”) but may be installed on slopes as low as 1:6 (2" in 12").
</li></ol>
</li></ol>

===={{hilite | 1.1.1.5. Reserved || 2026-February-1 }}====

===={{hilite | 1.1.1.6. Objectives || 2026-February-1 }}====

<ol>
<li>Every ''roof system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.7. Responsibility for Design || 2026-February-1 }}====

<ol>
<li>Each design of a ''roof system'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.8. Pre-Design Requirements || 2026-February-1 }}====
<ol>
<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''roof assembly''.
<li>{{hilite | When any element of a ''roof system'' for a pre-fabricated building or building assembly is or will be installed off site , the ''Design Authority'' must consult with the '''''RGC''''' directly concerning '''''RoofStar Guarantee''''' coverage and wind load design (for further reference, see || 2027-February-1 }} [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee {{hilite | Article 3.2.1.2. || 2027-January-16 }}] {{hilite | in Division A of the ''Manual'' || 2027-February-1 }}.
</li></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2026-February-1 }}====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''roof assembly'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and the roof class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''roof assembly'',
<li>the potential effects of reflected heat on the ''roof assembly'',
<li>''roof system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>{{hilite | In addition to Sentence (1), all ''projects'' shall comply with || 2024-October-20 }}
<ol>
<li>{{hilite | the ''project'' specifications and drawings, and || 2024-October-20 }}
<li>{{hilite | the ''manufacturer's'' published installation requirements || 2024-October-20 }}.
</li></ol>
</li></ol>

====1.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>{{hilite | To qualify for a '''''RoofStar 15-year Guarantee''''', each ''project'' must be designed and constructed in compliance with the requirements published in this Standard, including the following standards which are linked to their referenced Parts || 2022-February-5 }}:
<ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is mandatory ([[#2.1.2.2. RoofStar 15-Year Guarantee |Article 2.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | Only panels with a hidden clip securement system may be used to qualify for a '''''RoofStar 15-year Guarantee'''''. Flange-fastened panels are not permitted ([[#9.1.2.2. RoofStar 15-Year Guarantee |Article 9.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | All penetrations must be flashed by using the split panel detail; flexible boot flashings secured with gasketed screws are not permitted ([[#12.1.2.2. RoofStar 15-Year Guarantee |Article 12.1.2.2.]])|| 2022-February-5 }}.
<li>{{hilite | All penetration flashings that do not incorporate a settlement cap must be fitted with two storm collars separated by no more than 75 mm (3”), and each storm collar must be sealed with an untooled bead of sealant [[#12.1.2.2. RoofStar 15-Year Guarantee | Article 12.1.2.2.]]|| 2022-February-5 }}
</li></ol>
</li></ol>

===={{hilite | 1.1.2.3. Quality Control || 2026-February-1 }}====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''roof assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for projects further away than 100 km),
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

===={{hilite | 1.1.2.4. Quality Assurance || 2026-February-1 }}====
(See [[Notes to ASM Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2026-February-1 }}]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''roof system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of roofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Roof Systems====
(See [[Notes to ASM Standard#A-1.1.3.1.| Note A-1.1.3.1.]])

<ol>
<li>{{hilite | This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as || 2023-June-16 }}
<ol>
<li>{{hilite | uninsulated ''systems'' in which metal panels are secured directly to the ''roof deck'' or an overlay, and || 2023-June-16 }}
<li>{{hilite | insulated ''systems'', in which metal panels are installed above insulation and other roof system materials, and|| 2023-June-16 }} {{hilite | should be secured to the ''roof deck'' using means and methods that reduce thermal bridging (e.g., thermally non-conductive clips, girts, or bearing plates) || 2027-February-1 }}{{hilite | (See|| 2027-February-1 }}[[#7.1.3.4. Thermal Resistance and Layering |{{hilite | Article 7.1.3.4., ||2027-February-1 }}]]{{hilite |Sentence (4) and|| 2027-February-1 }}[[Notes to ASM Standard#A-1.1.3.1.|{{hilite | Note A-7.1.3.4.)|| 2027-February-1 }}]].
</li></ol>
<li>Architectural metal roofing systems accepted for use in the '''''RoofStar Guarantee Program''''' must be roll-formed hydrokinetic (water-shedding) systems commonly installed over solid roof ''decks'' or rigid insulation panels, but may also be intermittently supported when engineered to resist anticipated live loads (metal panels designed for use as structural (spanning member) systems are accepted for a '''''RoofStar Guarantee''''' only as an architectural metal panel system).
</li></ol>

===={{hilite | 1.1.3.2. Accessibility for Maintenance || 2026-February-1 }}====

<ol>
<li><div class="recommended">All roofs with a field elevation greater than 7620 mm (25’) above grade should incorporate access to the roof by stairs and a doorway, or with a properly located roof hatch.
<li>Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, in a manner consistent with worker safety regulations, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations''.
</li></ol>

===={{hilite | 1.1.3.3. || 2026-February-1 }} Snow Loads====

<ol>
<li>In this Standard, a ''high snow load area'' is considered a regional area with a ''Specified Snow Load'' higher than 3.5 kPa (See [[Notes to ASM Standard#A-1.1.3.2.| Note A-1.1.3.2.]]).
<li>Roofs subject to high snow loads must be designed with a supporting deck structure thick enough to support the anticipated live loads, within the acceptable deflection limits defined by the "British Columbia Building Code".
<li>{{hilite | In locations where moderate to heavy snow cover or high snow load conditions are possible or expected, the ''Design Authority'' should give consideration to || 2026-February-1 }} {{strike| Consideration should be given to || 2025-February-1 }}
<ol>
<li>slope,
<li>entrances and exits,
<li>penetrations,
<li>valley construction,
<li>proper intake and exit ventilation, irrespective of snow cover and drifting, and
<li>penetrations and their functionality.
</li></ol>
<li>{{strike| Roofs subject to high snow loads should be designed || 2025-February-1 }}{{hilite | Where snow fences or guards are required by the ''Design Authority'', they should be utilized only where a hazard to the public or property exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid panel distortion and damage to the ''roof system'' || 2026-February-1 }}.
{{strike| <ol>
<li>with full support for metal panels,
<li>with generous slope to shed snow from the roof surface (a slope of at least 1:1.5 (8” in 12”) is strongly recommended),
<li>to utilize a RoofStar-accepted self-adhered eave protection membrane as underlayment over the entire deck surface, regardless of slope and the requirements published elsewhere in this Standard,
<li>with widening valleys (from peak to eave),
<li>so that penetrations are located near the ridge line, and
<li>to utilize snow fences or guards (if so required by the ''Design Authority'') only where a hazard to the public exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid disfigurement and damage to the roof system.
</li></ol> || 2025-February-1 }}
</li></ol>

===={{hilite | 1.1.3.4. || 2026-February-1 }} Ventilation====

<ol>
<li>{{hilite | Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | {{hilite | While the || 2027-February-1 }} design and selection of the ventilation system is the responsibility of the ''Design Authority'',|| 2021-June-30 }} attic ventilation
<ol>
<li>{{hilite | must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, Article 9.19.1.1., "Venting")|| 2027-February-1 }},
<li>{{hilite | must should promote proper convection, drawing cool air from the lowest point in and exhausting warm air out near the ridge, and || 2027-February-1 }}
<li>{{hilite | shall be designed so that exhaust vents are located on only one side of a ridge or hip line, within 609.6 mm (24”) of a ridge, evenly spaced along the ridgeline (vents installed on opposite or adjacent sides of a roof plane, or staggered across the plane of drainage, will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Tall exhaust vents are recommended in regions where snow cover is common || 2027-February-1 }}.
<li>Attic ventilation {{hilite |may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents|| 2021-June-30 }},
<li>{{hilite | gable end vents|| 2021-June-30 }} {{hilite | (for exhaust only)|| 2027-February-1 }},
<li>{{hilite | {{strike| hip || 2026-January-16 }} {{hilite | powered or turbine exhaust || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | static {{hilite | (passive) || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | ridge {{hilite | and hip || 2027-February-1 }} vents|| 2021-June-30 }}, or
<li>{{hilite | cupolas|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"])|| 2021-June-30 }}.
<li>{{hilite | Ventilation must be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite | the slope of the roof|| 2021-June-30 }},
<li>{{hilite | the vented area|| 2021-June-30 }}, and
<li>{{hilite | the design and configuration of the roof structure|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ventilation must be provided for|| 2021-June-30 }}
<ol>
<li>{{hilite | roofs over cathedral ceilings|| 2021-June-30 }}, and
<li>{{hilite | compact insulated roof assemblies|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | {{hilite | are {{strike| acceptable and are || 2026-January-16 }} recommended for all areas with vaulted ceilings|| 2021-June-30}}|| 2027-February-1 }}, and
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Vents shall conform to the material and product requirements in || 2027-February-1 }} [[#12.2.1.4. Air Vents | {{hilite | Article 12.2.1.4.|| 2027-February-1 }}]] {{hilite |and must be selected for their ability to resist intrusion by insects, vermin, wind-driven debris, rain, or snow; leaks attributed to roof vents are not covered by a '''''RoofStar Guarantee'''''|| 2027-February-1 }}.
</li></ol>

====1.1.3.5. Hot Works====
(See [[Notes to ASM Standard#A-1.1.3.5.| Note A-1.1.3.5.]])

<ol>
<li>{{hilite | The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]) || 2021-February-7 }}.
<li>{{hilite | When the ''project'' involves Hot Work, the ''Design Authority'' must either || 2021-February-7 }}
<ol>
<li>{{hilite |pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire sensitive by the ''Contractor'' as part of the risk assessment process || 2021-February-7 }}, or
<li>{{hilite | provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project'' || 2021-February-7 }}.
</li></ol>
</li></ol>

===={{hilite | 1.1.3.6. Variances || 2021-June-30 }}====

<ol>
<li>{{hilite | When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must|| 2021-June-30 }}
<ol>
<li>{{hilite | identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned)|| 2021-June-30 }},
<li>identify the ''Contractor'' (if awarded),
<li>{{hilite | articulate the nature of the design problem|| 2021-June-30 }},
<li>{{hilite | identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")), || 2023-June-16 }}
<li>{{hilite | cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.)|| 2021-June-30 }}, and
<li>provide design drawings, photographs, and roof plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>{{hilite |Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''|| 2021-June-30 }}.
<li>{{hilite |A Variance may be unrestricted in its scope, or it may include one or more conditions, or a restriction in coverage, that will affect the design and construction of the ''project'', to accommodate the varied standard, but this is at the discretion of the '''''Guarantor'''''|| 2021-June-30 }}.
<li>{{hilite |Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm|| 2021-June-30 }}.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)

(See [[Notes to ASM Standard#A-1.1.4.| Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>
</li></ol>

====1.1.4.2. Complete Roof System Replacement====

<ol>
<li>Complete roof system replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Roof system'' replacement means the complete removal and replacement of all ''roof system'' and metal flashing materials, exclusive of the air or vapour ''control layers'', and only new replacement materials shall be installed.
<li>Subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]], the decision to reuse and repair an existing air or vapour ''control layer'' remains the responsibility of the ''Design Authority''.
<li>''Roof system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Reserved====

====1.1.4.4. Reserved====

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a ''control joint'' securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If ''project'' conditions do not allow for a curb joint, the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (See [[#1.1.3.6._Variances |Article 1.1.3.6.]]); any alternative design must
<ol>
<li>include design specifications and construction details showing a positive water cut-off that fully isolates the existing roof from the new roof, and
<li>show how the new ''roof system'' will be easily distinguishable from the existing roof system.
</li></ol>
<li>{{hilite | Repairs or renovations to an existing ''roof system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''roof system''). || 2023-June-16 }}
<li>{{hilite | Modifications or additions to a guaranteed roof are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''. || 2023-June-16 }}
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: {{hilite | Contractor Requirements || 2021-February-7 }}====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====
(See [[Notes to ASM Standard#A-1.3.3.2. | Note A-1.3.3.2.]])

<ol>
<li>{{hilite | The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of {{hilite |the ''project''||2022-February-5 }}.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible to make a permanent seal or install overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]].) || 2021-February-7 }}.
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision, manufacturing, and installation of a RoofStar-guaranteed ''Architectural Sheet Metal Roof System'' shall be undertaken only by established employees of ''Contractors'', each having obtained a valid
<ol>
<li>Architectural Sheet Metal Journeyperson Certificate of Qualification, or
<li>Sheet Metal trade ticket, together with at least five (5) years of documented experience installing and supervising the installation of ASM roofing (ref. RCABC Policy A-248).
</li></ol>
</li></ol>

====1.3.2.4. {{hilite | Contractor Submittals || 2026-February-1 }}====
(See also [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] {{strike| and [[#9.2.1.2. Roll Forming Machines and Mill Certificate | Article 9.2.1.2.]] || 2025-February-1 }})

<ol>
<li>{{strike| {{hilite | To qualify for a '''''RoofStar Guarantee''''', the ''Design Authority'' must || 2023-June-16 }} || 2022-October-28 }}{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'' sealed engineered shop drawings conforming to the requirements in || 2023-October-28 }} [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | and || 2023-October-28 }} [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>{{hilite | When tall clips are used as an alternative to EPDM pads (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]), {{hilite | the ''Contractor'' must provide the '''''Guarantor''''' with stamped, written assurance from the ''Design Authority'' that || 2024-January-31 }}
<ol>
<li>{{hilite | the clips will adequately secure and support the elevated panels, and || 2024-January-31 }}
<li>{{hilite | the panels are suitable as spanning members, and will support anticipated live loads, including loads during construction. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The ''Contractor'' is responsible for providing to the '''''Guarantor''''' a copy of the mill certificate for the sheet metal used to form metal panels and related flashings (the certificate may be provided directly, or shown to the observer who shall take a photographic record of the certificate for the '''''Guarantor''''' || 2026-February-1 }} (See [[#9.2.1.2. Roll Forming Machines and Mill Certificate | {{hilite | Article 9.2.1.2. || 2026-February-1 }}]]).
{{strike| <ol>
<li>{{hilite | document the wind resistant design on a Schedule S form (Specialty engineering; see the "British Columbia Building Code", current edition), and || 2023-June-16 }}
<li>{{hilite | submit the Scheduled S form to the '''''Guarantor''''' as part of the ''project'' record. || 2023-June-16 }}
</li></ol> || 2022-October-28 }}
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>

====1.3.3.2. Complete Roof System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.3. Partial Roof Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.4. Reserved====

====1.3.3.5. Tie-ins and Additions to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a curb joint securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of curb joints, the new roof system must be fully isolated from the existing roof system with a positive water cut-off that renders the new roof system easily distinguishable from the existing ''roof system''.
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>{{hilite | When a ''roof system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation) || 2023-June-16 }}
<ol>
<li>{{hilite | the securement of new materials || 2023-June-16 }} ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>{{hilite | deck or wall overlays || 2023-June-16 }} ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>{{hilite | continuity of air and vapour controls || 2023-June-16 }} ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>{{hilite | thermal resistance || 2023-June-16 }} ([[#Part 7 - Insulation | Part 7]],
<li>{{hilite | eaves, valleys, and underlayment || 2023-June-16 }} ([[#PART 8 - Eave, Valley, and Field Underlayment | Part 8]]),
<li>{{hilite | metal panels || 2023-June-16 }} ([[#Part 9 - Roof Field (Panel Systems) | Part 9]]),
<li>{{hilite | perimeter details || 2023-June-16 }} ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>{{hilite | drains || 2023-June-16 }} ([[#Part 11 - Drainage | Part 11]]),
<li>{{hilite | penetrations and curbs || 2023-June-16 }} ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>{{hilite | linear metal flashings || 2023-June-16 }} ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>{{hilite | Modifications to an existing ''roof system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', drains, or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated. || 2023-June-16 }}
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to ASM Standard#A-2 | Note A-2]])
<div id="DECK_CONDITION"></div>

=={{hilite | Section 2.1. Design || 2021-June-30 }}==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====
({{hilite | See '''Figure 2.1.1.2.-A''' || 2026-February-1 }})

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a roof with a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>{{hilite | ''Deck overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials|| 2021-June-30 }}.
<li>''Extreme Slope'' means a roof with a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' (roof) means a roof with a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>{{hilite | ''Sheathing'' means a rigid panel material secured directly onto framing. || 2024-January-31 }}
<li>''Steep Slope'' means a roof with a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>{{hilite | ''Supporting deck'' ("deck")|| 2021-June-30 }} {{hilite | means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'')|| 2021-June-30 }}.
<li>{{hilite | ''Wall''|| 2021-June-30 }} {{hilite | means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions")|| 2021-June-30 }}.
<li>{{hilite | ''Wall overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials|| 2021-June-30 }}.
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2026-February-1 }} {{hilite | Forming Part of Article 2.1.1.2. || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 450 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed with a minimum slope of 1:6 (2” in 12”), which may not be reduced through a written Variance {{hilite | (Note: curved or barrel-shaped roofs may be permitted under a written Variance, subject to a review by the '''''Guarantor'''''). || 2023-June-16 }}
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a roof to achieve proper drainage{{hilite |, taking into consideration|| 2027-June-11 }} {{strike| and must take into consideration || 2026-June-11 }}
<ol>
<li>the anticipated deflection and settlement of the structure, which may interfere with drainage{{hilite | , and || 2027-June-11 }}
<li>{{hilite | the limitations of panel seams (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2027-June-11 }}.
</li></ol>
{{strike| <li>Throughout this Standard, the defined terms of [[#2.1.1.2. Defined Terms | Article 2.1.1.2.]] apply (See '''Figure 2.1.1.2.-A''' for an illustrated guide to the above definitions). || 2025-February-1 }}
<li>Roofs with designed slopes less than the stated minimums in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.3.]] (i.e., curved applications; see also [[#9.1.3.4. Curved Panel Systems | Article 9.1.3.4.]]) will be considered for a '''''RoofStar Guarantee''''' provided
<ol>
<li>the design and installation details are submitted in writing to the '''''Guarantor''''' prior to the tendering of documents, and
<li>a written Variance is issued by the '''''Guarantor''''' prior to close of tender.
</li></ol>
</li></ol>

====2.1.3.2. Roof Slope for New Construction====

<ol>
<li>All roof slopes must be designed to comply with the slope limitations of metal panels seam types in Article 9.1.3.1.
<li>{{hilite | When the designed slope of a metal panel roof with mechanical locking seams|| 2027-June-11 }}{{strike| Roofs with a designed slope || 2026-June-11 }}
<ol>
<li>is equal to or greater than 1:6 (2" in 12"), a written Variance from the '''''Guarantor''''' is not required but the design must nevertheless conform to the requirements in this Standard, howsoever they apply.
{{strike| equal to or greater than 1:6 (2" in 12") do not require a written Variance from the '''''Guarantor''''' and must be designed to conform to the requirements in this Standard, howsoever they apply,|| 2026-June-22 }}
<li>is less than 1:6 (2" in 12"), the design
<ol>
<li>will be permitted {{strike| are permissible || 2026-June-11 }} only through a written Variance from the '''''Guarantor''''',
<li>{{hilite | shall|| 2027-June-11 }} {{strike| be designed to || 2026-June-11 }} conform to the requirements in this Standard, and
<li>shall comply with any and all requirements or conditions stipulated in the Variance.
</li></ol>
<li>is less than 1:4 (3" in 12"), the engineered shop drawing package must be accompanied by manufacturer’s literature confirming that this application is acceptable.
</li></ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) {{hilite | for a metal panel roof with mechanical locking seams|| 2027-June-11 }} is {{strike| a requirement|| 2026-June-11 }}{{hilite | required|| 2027-June-11 }} for a '''''RoofStar 15-year Guarantee''''' (See [[#2.1.2.2. RoofStar 15-Year Guarantee | Article 2.1.2.2.]] {{hilite | and seam requirements in '''Table 9.1.3.3.-A'''|| 2027-June-11 }}).|| 2022-February-5 }}
</li></ol>

====2.1.3.3. Roof Slope for Replacement Roofing====

<ol>
<li>{{hilite | The requirements in || 2023-June-16 }} [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]] {{hilite | and || 2023-June-16 }} [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] {{hilite | apply to replacement roofing. || 2023-June-16 }}
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Roofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''roof system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.1.| Note A-2.1.5.1.]])

<ol>
<li>Steel ''decks'' must be acceptable to the roof system manufacturer and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
</li></ol>

====2.1.5.2. Concrete Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Direct contact between metal roofing and concrete, light concrete, stone and mortar '''must be avoided'''.
<li>The selection of a suitable underlay, insulation, and method of attachment to a concrete ''deck'' or ''wall'' is the responsibility of the ''Design Authority''.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.3.| Note A-2.1.5.3.]])

<ol>
<li>Wood decks
<ol>
<li>must conform to the material requirements of the Code (see "British Columbia Building Code", Division B, Part 9, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s923 Article 9.23.16.2.. "Material Standards"]),
<li>shall be free of loose knots or cracks,
<li>{{hilite | shall have a moisture content acceptable to the ''manufacturer'' (for self-adhered or adhered membranes, moisture content shall not exceed 19%; Ref. Canadian Wood Council, || 2023-October-28 }} [https://cwc.ca/en/why-build-with-wood/durability/durability-hazards/moisture-and-wood/ "Moisture and Wood"]), and
<li>{{hilite |shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction || 2021-February-7 }}; specifying the structural suitability of fasteners is the responsibility of the ''Design Authority''.
</li></ol>
<li>Differential edge movements or deflection exceeding 1/360 of the span must be prevented
<ol>
<li>by constructing the ''deck'' with tongue-and-groove plywood, and supporting the non-grooved edges with joists or solid blocking, or
<li>by supporting butt joints at unsupported edges with solid blocking.
</li></ol>
<li>All wood decks shall be
<ol>
<li>at least 15.88 mm (5/8") thick, and
<li>capable of the required pull-out resistance for expected fasteners (knotholes and cracks in decks shall be considered defects and must be covered with sheet metal, mechanically fastened in place),
</li></ol>
<li>{{hilite | All mass timber or wood board ''decks'' must be covered with a properly secured, suitable overlay to || 2021-February-7 }}
<ol>
<li>ensure the integrity of the underlayment as mass timber elements contract and expand, and
<li>{{hilite | protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2021-February-7 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li>All types of wood ''decks'' should be roofed promptly after installation.
</li></ol>

====2.1.5.4. Plywood Roof Decks====

<ol>
<li>Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to ASM Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All non-ferrous (i.e. copper, zinc) metal panel roof systems must be installed over tongue-and-groove plywood decks conforming to the minimum material properties and thicknesses stated in this Article.
<li>{{hilite | All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see || 2023-June-16 }} [[#2.1.5.5. Mass Timber Roof Decks | Article 2.1.5.5.]], [[#2.1.5.6. Non-veneered Panel Roof Decks | Article 2.1.5.6.]], and [[#2.1.5.7. Wood Board Roof Decks | Article 2.1.5.7.]]) {{hilite | shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be || 2023-June-16 }}
<ol>
<li>{{hilite | at least 15.88 mm (5/8") thick, unless exceeded by the specified securement design || 2023-June-16 }} (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>{{hilite | free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place, || 2023-June-16 }}
<li>{{hilite | securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing, || 2023-June-16 }}
<li>{{hilite | properly gapped between panels, and || 2023-June-16 }}
<li>{{hilite | fully supported along all panel edges. || 2023-June-16 }}
</li></ol>
</li></ol>

====2.1.5.5. Mass Timber Roof Decks====

<ol>
<li>{{hilite | Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated timbers (Glulam), are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in || 2023-June-16 }} [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
</li></ol>

====2.1.5.6. Non-veneered Panel Roof Decks====

<ol>
<li>{{hilite | Oriented Strand Board (OSB) is not acceptable deck material for Architectural Sheet Metal panel ''roof systems'' || 2023-June-16 }}.
</li></ol>

====2.1.5.7. Wood Board Roof Decks====

<ol>
<li>Wood board ''decks''
<ol>
<li>must be overlaid with plywood in keeping with the general requirements for wood ''decks'' in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
<li>{{hilite | must be removed and replaced with new material when they are damaged or excessively cupped (excessive cupping is considered 25.4 mm (1”) or more when measured against the mid-span deflection of the ''deck''). || 2023-June-16 }}
</li></ol>
</li></ol>

==={{hilite | 2.1.6. Reserved || 2024-October-20 }}===

===2.1.7. Walls===
(See [[Notes to ASM Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====

<ol>
<li>{{hilite | ''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials|| 2021-June-30 }}.
<li>{{hilite | Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings|| 2021-June-30 }}; {{hilite | when sheathing is unsuitable, it must be overlaid with an accepted wall overlay. || 2024-January-31 }}
<li>{{hilite | ''Sheathing''{{strike| , defined as a rigid panel material secured directly onto framing, || 2023-January-26 }} is considered a wall surface for the purpose of this Standard|| 2021-June-18 }}.
<li>{{hilite | ''Wall'' surfaces {{hilite | suitable for || 2024-January-31 }} receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the|| 2021-June-18 }} ''finished system surface'' {{hilite | (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]])|| 2021-June-18 }}.
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to ASM Standard#A-2.1.8.| Note A-2.1.8.]] concerning electrical systems, fire and shock hazards, and Rule 12-022 of the Canadian Electrical Code, Part I)

====2.1.8.1. New Construction====

<ol>
<li>Electrical cables, raceways or boxes shall not be installed within a ''roof assembly'' {{hilite | ({{hilite | '''Figure 2.1.8.1.-A''' || 2026-February-1 }})|| 2021-February-7 }}.
<li>Electrical cables, raceways or boxes shall not be installed on the underside of a ''roof assembly'', unless
<ol>
<li>the ''supporting deck'' structure equals or exceeds 76.2 mm (3”) in thickness {{hilite | ({{hilite | '''Figure 2.1.8.1.-B''' || 2026-February-1 }})|| 2021-February-7 }}, or
<li>the cables, raceways or boxes are installed and supported so there is a separation of not less than 38.1 mm (1-1/2") measured between the underside of the ''roof assembly'' and the electrical installation {{hilite | ({{hilite | '''Figure 2.1.8.1.-C''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
<li>Notwithstanding either (1) and (2), cables or raceways shall be permitted to pass through a ''roof assembly'' for connection to electrical equipment installed on the roof, provided that the passage through the roof is a part of the ''roof assembly'' design.
<li>{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing|| 2021-February-7 }} {{hilite | ({{hilite | '''Figure 2.1.8.1.-D''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A''' '''Prohibited Installation of Electrical Conduit''' Forming Part of Sentence 2.1.8.1.(1)|| 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B''' '''Roof Decks and Electrical Conduit Installation''' Forming Part of Clause 2.1.8.1.(2)(1) || 2026-February-1 }}(Click to expand)
|-
| [[File:Figure 2.1.8.1.-A (Electrical).jpg | link=https://rpm.rcabc.org/images/f/f5/Figure_2.1.8.1.-A_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-B (Electrical).jpg | link=https://rpm.rcabc.org/images/3/32/Figure_2.1.8.1.-B_%28Electrical%29.jpg | 350 px]]
|}
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-C''' '''Minimum Separation Between Roof Assembly and Electrical Conduit''' Forming Part of Clause 2.1.8.1.(2)(2) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D''' '''Electrical Conduit Elevated Above Roof Assembly''' Forming Part of Sentence 2.1.8.1.(4) || 2026-February-1 }} (Click to expand)
|-
| [[File:Figure 2.1.8.1.-C (Electrical).jpg | link=https://rpm.rcabc.org/images/d/db/Figure_2.1.8.1.-C_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-D (Electrical).jpg | link=https://rpm.rcabc.org/images/e/ef/Figure_2.1.8.1.-D_%28Electrical%29.jpg | 350 px]]
|}

<div class="col-md-12">
 
</div>

====2.1.8.2. Roof Replacement and Alterations====

<ol>
<li>If existing electrical cables or boxes do not conform to the requirements in [[#2.1.8.1. New Construction | Article 2.1.8.1.]], the ''Design Authority'' must consider the attachment of the ''roof system'' above the electrical system, and the requirements set out in [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]].
<li>The ''Design Authority'' should
<ol>
<li>specify protection of existing electrical cables and boxes (a 4.76 mm (3/16”) steel plate may be used to minimize the possibility of fastener penetration and cutter damage, {{hilite | but protection plates may interfere with mechanical fasteners used to secure the ''roof system'' against wind uplift, even for future replacement roofing)|| 2021-February-7 }}, and
<li>provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes.
</li></ol>
</li></ol>

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) {{hilite | (These panels are specifically {{hilite | designed to receive roof membranes|| 2021-June-30 }} and may be installed horizontally or vertically)|| 2021-June-30 }}.
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), or
<li>{{hilite | plywood, having a minimum thickness of 12.7 mm (1/2”)|| 2021-June-30 }}.
</li></ol>
<li>Where wall sheathing is unsuitable to receive roofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be constructed with a minimum slope of 1:6 (2” in 12”).
</li></ol>
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of deck and wall structures, and their suitability for the application of roofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Roof Assembly=
==Section 3.1. Design==
===3.1.1. General===
===={{hilite | 3.1.1.1. Scope || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>This Part applies to all new roofs, and to both full and partial replacement ''roof systems''.
<li>This Part sets out the requirements for
<ol>
<li>roofs that support ''overburden'', or fixed amenities and equipment, and
<li>roofs where only part of the ''system'' must be replaced.
</li></ol>
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.2. | Note A-3.1.1.2.]])

<ol>
<li>The requirements in this Part intend to support and conform to or exceed the Building Code.
</li></ol>

===={{hilite | 3.1.1.3. Limit of Liability under RoofStar Guarantee || 2023-June-16 }}====

<ol>
<li>{{hilite |Notwithstanding [[#3.1.1.2. Intent | Article 3.1.1.2.]], the materials presented herein are based on an interpretation of the Code and are not the Code itself; therefore, the reader is responsible to exercise good judgement, and to read, understand and comply with the Code, as and how it applies to the reader’s particular ''project'' and its design requirements.
<li>Where the Code can be shown to exceed the requirements, guiding principles, and recommendations of this Part or any related Part in this Standard, the Code shall prevail|| 2021-October-30 }}.
<li>{{hilite |Compliance with this Part or the Code does not guarantee that a roof will not succumb to forces exerted by wind, and therefore neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, a roof system caused by wind; too many variables beyond the control of this Standard affect the wind resistance performance of a ''roof system'', including (without limitation)|| 2021-October-30 }}
<ol>
<li>{{hilite | the ''continuity'' or discontinuity of air and vapour ''control layers'' of the entire building enclosure|| 2021-October-30 }},
<li>{{hilite | openings in the building (windows and doors, which are often occupant-controlled and not static)|| 2021-October-30 }}, and
<li>{{hilite | wind strength, which may exceed the codified numeric wind speed values used to calculate wind resistance for the ''roof system'' || 2021-October-30 }} (Ref. "British Columbia Building Code 2024", Division B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=762 Appendix C, "Table C-1"]).
</li></ol>
</li></ol>

===={{hilite | 3.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }} || 2023-June-16 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Registered Professional'' has the same meaning as that used in the "British Columbia Building Code 2024", Division C, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"].
<li>''Specified Wind Load'' means the calculated force of wind exerted on the roof of a specific building, according to the requirements in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=496 Section 4.1., "Structural Loads and Procedures"].
</li></ol>
</li></ol>

===3.1.2. Guarantee Term Requirements===
====3.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===3.1.3. All Systems===
===={{hilite | 3.1.3.1. Responsibility for Design || 2023-June-16 }}====

<ol>
<li>The ''Design Authority'' is responsible for determining ''Specified Wind Loads'' for each ''roof system'' and each roof area of a ''project'', including roofs that support ''Vegetated Roof Systems'' or any other ''overburden'', amenities, or equipment.
<li>Acceptance of a roof for a '''''RoofStar Guarantee''''' is predicated on the assumption that the ''Design Authority'' has performed Due Diligence with respect to ''Specified Wind Loads'' and has provided the ''Contractor'' with sufficient information to construct a ''roof system'' that complies with the Code.
</li></ol>

===={{hilite | 3.1.3.2. Calculation of Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
<ol>
<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
<li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to ASM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
</li></ol>
<li>Each roof area, at each level (elevation), shall be divided into three principal roof zones ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}), and the ''Design Authority'' shall be responsible for calculating the ''Specified Wind Loads'' for each zone (Ref. the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=535 Article 4.1.7.6., "External Pressure Coefficients for Low Buildings"]).
<li>Roof zones are defined in this Standard as follows:
<ol>
<li>'''Field (F)''' – the interior of the roof bounded by the ''Edge'' and the ''Corners''.
<li>'''Edge (E)''' – the perimeter zone (minus the corners), measured as either 10% of the smallest building width ("least horizontal dimension"), or 40% of the building height, whichever is less. Notwithstanding the requirements in the "British Columbia Building Code", the ''Edge'' zone shall not be less than 2.0 m (7').
<li>'''Corner (C)''' – part of the perimeter but not less than 2.0 m x 2.0 m (7’ x7’) in size, the ''Corner'' area is defined by the ''Edge'' in both directions at the corners. Where the roof geometry includes an inside corner, the ''corner'' zone dimensions shall be the same as those for an outside corner, applied equidistant in each direction from the inside corner ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}).
</li></ol>
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.1.-A Water-shedding Systems 2.jpg|link=https://rpm.rcabc.org/images/c/c7/Figure_3.1.-A_Water-shedding_Systems_2.jpg | 500 px]]
|}
 
<li>A roof area that is divided into smaller segments by means of ''control joints'' (roof dividers, i.e., a fire wall) or ''expansion joints'', shall be considered one roof area for the purpose of calculating the ''Specified Wind Loads'', unless the height of a ''control joint'' or ''expansion joint'' exceeds 1 m (39"), in which case the ''Specified Wind Loads'' for each roof segment shall be calculated separately (See {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When a building is designed with multiple roof levels (at different elevations), and the roofs are adjacent each other (having a common wall), the ''Specified Wind Loads'' for each level, and for each roof area on that level, shall be calculated separately from loads for the adjacent level, unless the elevation difference between adjacent roof levels is less than 1.524 m (5’).
<li>When the shape of a single-level roof varies in width or length, the smallest width dimensions shall be used in the calculation of ''Specified Wind Loads'' (Ref. “minimum effective width” as defined in the "British Columbia Building Code", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=530 Article 4.1.7.2., "Classification of Buildings"]).
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Divided by a Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(4) || 2026-February-1 }} (Click to expand illustration)
|-
| colspan="1"; style="text-align:center;width:450px;" | [[File:Figure 3.1.-B Water-shedding Systems.jpg|link=https://rpm.rcabc.org/images/8/8e/Figure_3.1.-B_Water-shedding_Systems.jpg | 500 px]]
|}
 
<li>When a roof area intersects the corner of a wall, the ''Edge'' zone on either side of the wall corner must be treated as a roof ''Corner'' (2 x C) {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When an existing roof system is specified for partial replacement, the ''Design Authority'' must
<ol>
<li>calculate the ''Specified Wind Loads'' for the roof,
<li>determine if securement of the remaining roof components (left in situ) is sufficient to resist the ''Specified Wind Loads'',
<li>determine a suitable method of securement or have the ''system'' of securement engineered, and
<li>calculate and design securement for any structures or equipment.
</ol></li>
<li>''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement (See also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., "Electrical Cables and Boxes"]]).
<li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
<li>Securement of an adjoining ''waterproofing system'' shall be made in accordance with the requirements in the applicable Standard.
</li></ol>
</li></ol>

===={{hilite | 3.1.3.3. Resistance to Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>The wind uplift resistance capabilities of the selected ''roof system'' must equal or exceed the ''Specified Wind Loads'' calculated for each roof zone to which the ''system'' will be applied (see [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]]).
<li>Engineered designs to resist wind uplift may refer to the "British Columbia Building Code", Div. B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=764 Appendix C, "Table C-2"], which lists various types of loads, including wind loads, for specific reference locations throughout the province.
<li>Each engineered design must include, without limitation, the following:
<ol>
<li>Metal panel profile and gauge
<li>Type of clips
<li>Bearing plates
<li>Drag load components
<li>Fasteners (type, size and spacing)
<li>Roof assembly components (i.e. underlayment, insulation)
<li>Deck Substrate
</li></ol>
</li></ol>

===={{hilite | 3.1.3.4. Resistance to Other Loads || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.3.4. | Note A-3.1.3.4.]])

<ol>
<li>In addition to its capacity to resist ''Specified Wind Loads'', the ''roof system'' must be capable of resisting or accommodating
<ol>
<li>all anticipated live and dead loads, including (without limitation) other environmental loads, such as rain and snow, expected for the building’s size and location,
<li>gravity ("drag") loads,
<li>loads from ''overburden'' (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
</li></ol>

====3.1.3.5. {{hilite | Reserved || 2026-February-1 }}====

===3.1.4. Insulated Roof Systems===
===={{hilite | 3.1.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>New and fully replaced ''insulated systems'' shall satisfy the requirements of the "British Columbia Building Code" and this Part, and shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.1.5. Uninsulated Roof Systems===
===={{hilite | 3.1.5.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be designed for securement directly to the ''roof deck''.
</li></ol>

===3.1.6. Reserved===

===3.1.7. Roof Replacement and Alterations===
===={{hilite | 3.1.7.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads'' and must follow the design requirements specified by the ''Design Authority''.
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===
===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The ''Design Authority'' should specify the correct type of fastener, keeping in mind
<ol>
<li>pull-out strength, and
<li>corrosion resistance (contributing factors to fastener corrosion may include dissimilar metal contact, excessive building humidity, corrosive chemicals within components of the ''roof system'', or corrosive elements provided within the building envelope etc.).
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Fasteners
<ol>
<li>used to secure metal panels or clips shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and
<li>used to secure linear metal flashings shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>
</li></ol>

==Section 3.3. Application==
===3.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''',
</li></ol>

===3.3.2. All Systems===
====3.3.2.1. Securing Systems with Mechanical Fasteners====
({{hilite | See '''Figure 3.3.2.1.-A''' || 2021-October-30 }})

<ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}
<ol>
<li>{{hilite | be secured to a firm support, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>Concealed fasteners should provide clearance for the underside of the metal panel and must be of a material compatible with the panel or metal clip.
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}

===3.3.3. Insulated Roof Systems===
===={{hilite | 3.3.3.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Insulated systems'' shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.3.4. Uninsulated Roof Systems===
===={{hilite | 3.3.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be secured with clips fastened to the ''roof deck'', in keeping with the engineered design requirements (Ref. [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]) and conforming to the material requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]
</li></ol>

===3.3.5. Reserved===
===3.3.6. Roof Replacement and Alterations===
===={{hilite | 3.3.6.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>''Roof systems'' that are removed and replaced in their entirety (excluding the air or vapour controls, which may be left in place at the discretion of the ''Design Authority'') must be secured following the requirements for new ''roof systems''.
</li></ol>

===={{hilite | 3.3.6.2. Partial Roof Replacement || 2023-June-16 }}====

<ol>
<li>When only a portion of an existing ''roof system'' is specified for replacement, the new materials must be secured to resist wind ''Specified Wind Loads'', following the design specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'' means a material used in a roof or grade-level waterproofing ''system'' that protects a building interior from water. ''Primary materials'' are often exposed to the weather (protected membranes are an exception), and therefore also protect ''secondary materials'' from damage. Membranes, metal panels, asphalt shingles, and cedar shakes and shingles, form the core body of materials classified as ''primary''.
<li>''Secondary Material'' means one which forms part of a ''waterproofing system'' or ''water-shedding system'', and which may affect the wind resistance characteristics of the entire ''assembly'' but is not necessarily exposed to the weather.
</li></ol>
</li></ol>

===4.1.2. Reserved===
===4.1.3. Reserved===

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the ''manufacturer'' of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>{{hilite | validated with a packing slip, retained in their original packaging, or their packaging must be retained on site, and made available to the observer for verification and documentation || 2026-February-1 }},
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the roof surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''roof system'' shall conform to the ''manufacturer's'' published requirements, unless stated otherwise in this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to ASM Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to ASM Standard#A-5.1.3.1.| Note A-5.1.3.1.]])

<ol>
<li>A deck or wall overlay must be specified
<ol>
<li>when a thermal layer is required by the Building Code, or
<li>when the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li>''Uninsulated systems'' designed for a steel deck require a ''deck overlay'' to support the underlayment.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>Deck and wall overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>{{hilite | suitable for the type of ''deck'' || 2023-October-28 }}, and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
<li>When plywood is used as a deck overlay, only tongue-and-groove plywood is acceptable and must be
<ol>
<li>at least 12.7 mm (1/2”) thick when installed over a mass timber deck, or
<li>at least 15.88 mm (5/8”) thick, when the roof supports overburden.
</li></ol>
</li></ol>

====5.2.1.2. Thermal Barrier====

<ol>
<li>When the Code having jurisdiction requires a thermal barrier, any material selected from [[Division_C | Division C]] must be suitable for the purpose.
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU), or
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), conforming to ASTM C1325 (latest edition), "Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units".
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Panel Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.3.2. All Systems===
====5.3.2.1. Support, Arrangement, and Securement of Deck Overlays====

<ol>
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>''Deck'' overlays shall be affixed to the ''deck'' with
<ol>
<li>mechanical fasteners conforming to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]],
<li>polyurethane foam adhesives acceptable to the ''manufacturer'' and conforming to the requirements in [[#3.2.2.2. Adhesives | Article 3.2.2.2.]], or
<li>a combination of mechanical fasteners and polyurethane foam adhesives.
</li></ol>
<li>When mechanical fasteners are used to secure deck overlays, the minimum number of fasteners (in combination with plates) shall be four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel ''deck'' panels must be overlaid with a suitable substrate to provide a smooth, uniform surface for roofing.
<li>RoofStar-accepted ''deck'' overlay boards used as a thermal barrier to achieve a specific fire rating must conform to the applicable code and insurance requirements for the ''roof system''.
<li>When the ''roof system'' is uninsulated, the ''deck'' must be overlaid with at least one 12.7 mm (1/2”) thick layer of
<ol>
<li>moisture resistant gypsum core ''deck'' overlay board, or
<li>plywood.
</li></ol>
</li></ol>

====5.3.2.3. Overlays on Concrete Decks====

<ol>
<li>While metal panels must be separated from a concrete ''deck'' to prevent corrosion, a ''deck overlay'' is not mandatory, and separation may be made with an underlayment.
</li></ol>

====5.3.2.4. Overlays on Wood Decks====

<ol>
<li>A mechanically fastened overlay board is required for any ''deck'' structure that does not meet the ''deck'' fastening criteria set out in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]].
</li></ol>

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>''Wall'' overlay panels must be
<ol>
<li>mechanically fastened with screw fasteners spaced no more than 304.8 mm (12”) O.C., both vertically and horizontally; fasteners must align with structural supports, and shall be placed
<ol>
<li>at the perimeters,
<li>at the corners, and
<li>in the field, or
</li></ol>
<li>adhered with a polyurethane adhesive, applied with a continuous z-patterned ribbon spaced no less than 304.8 mm (12”) apart.
</li></ol>
</li></ol>
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to ASM Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to ASM Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. {{hilite | Additionally, the following terms are used in this Part || 2024-June-15 }}:
<ol>
<li>{{hilite | ''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material || 2024-June-15 }}.
<li>{{hilite | ''Continuity'' means a sealed, resistive, continuous connection || 2024-June-15 }}
<ol>
<li>{{hilite | between ''control layers'' that have the same function, and || 2024-June-15 }}
<li>{{hilite | between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration) || 2024-June-15 }}.
</li></ol>
<li>{{hilite | ''Control layer'' means a material used in a ''roof assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly || 2024-June-15 }}.
<li>{{hilite | ''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material || 2024-June-15 }}.
<li>{{hilite | ''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material, and is usually used in wall assemblies || 2024-June-15 }}.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible to specify
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''roof system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to ASM Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''roof system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity {{hilite | of Control Layers || 2024-June-15 }} {{strike| Between Building Enclosure Systems || 2023-June-15 }}====

<ol>
<li>The ''Design Authority'', and trades constructing walls and roofs, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between ''wall systems'' and ''roof systems''.
<li>{{hilite | Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor'' || 2024-June-15 }}.
<li>{{hilite | ''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials ({{hilite |some air ''control layers'' are considered vapour permeable, others vapour-impermeable || 2020-October-22 }}); ''roof systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>{{hilite | All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B, || 2024-June-15 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. High-humidity Building Interiors====

<ol>
<li>Careful consideration should be given to the performance characteristics of air and vapour ''control layers'' when specifying such a membrane for ''roof systems'' constructed over high-humidity building interiors, which may be susceptible to the accumulation of moisture within the ''roof system'' unless effective air and vapour controls are installed; these building interiors include (but are not limited to)
<ol>
<li>swimming pools,
<li>commercial laundry facilities,
<li>large aquariums, and
<li>paper mills.
</li></ol>
</li></ol>

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the roof or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to ASM Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a roof designed and built to qualify for a '''''RoofStar Guarantee''''' shall not include
<ol>
<li>polyethylene sheet plastic, or
<li>bitumen-impregnated kraft paper.
</li></ol>
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick {{hilite | self-adhering bituminous or butyl-based membrane || 2026-February-1 }} is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>{{hilite | Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard|| 2020-July-3 }}.
<li>{{hilite | A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited|| 2020-July-3 }}.
</li></ol>

====6.2.1.5. Vapour Controls for Concrete Decks====

<ol>
<li>Because curing concrete releases considerable moisture that can compromise the performance of a ''roof system'', a vapour ''control layer'' installed on new concrete ''decks'' (28 days or older) must be selected to prevent condensation inside the ''roof system''.
<li>A membrane with a permeability of 0.01 perms (Class I) is recommended for applications on concrete substrates, but the selection of vapour control materials is nevertheless the responsibility of the ''Design Authority''.
</li></ol>

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' in the ''roof system'' field, and at perimeters, are installed to provide at least 101.6 mm (4”) of overlap, for continuity of matching layers in adjacent assemblies,
<li>{{hilite | ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', || 2023-June-16 }} and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., walls), when a roof is replaced.
</li></ol>
<li>Installation of all air and vapour control materials must be {{hilite | smooth and uniform, without wrinkles or fish-mouths|| 2020-July-3 }}, and must {{hilite | also|| 2020-July-3 }} conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>{{hilite | When self-adhered membranes are applied directly to a steel supporting ''deck'',|| 2021-February-7 }}
<ol>
<li>{{hilite | membranes should be oriented parallel to the direction of ''deck'' flutes|| 2021-February-7 }}, and
<li>{{hilite | membrane laps and changes in plane must be supported by deck flutes, or by flat metal supports secured to the deck to span gaps|| 2021-February-7 }}.
</ol></li>
<li>When metal supports are used to span gaps between steel deck flutes, they must be
<ol>
<li>{{hilite | fabricated from pre-finished steel with a thickness no less than 24-gauge|| 2021-February-7 }}, and
<li>{{hilite | secured to the ''deck'' with no fewer than two (2) compatible screw fasteners per flute|| 2021-February-7 }} ({{hilite | See {{hilite | '''Figure 6.3.2.1.-A''' || 2026-February-1 }} and {{hilite | '''Figure 6.3.2.1.-B''' || 2026-February-1 }}|| 2021-February-7 }}).
</ol></li>
<li>{{hilite | ''Roof drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity'' || 2024-June-15 }}.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck With Metal Support''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck With Deck Overlay Panel''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }}
|-
| [[File:Figure 6.3.1-1.jpg | link=https://rpm.rcabc.org/images/5/54/Figure_6.3.1-1.jpg | 350 px]] || [[File:Figure 6.3.1-2.jpg | link=https://rpm.rcabc.org/images/d/d0/Figure_6.3.1-2.jpg | 350 px]]
|}

====6.3.2.2. Torch-applied Materials====

<ol>
<li>{{hilite | The application of materials to an unprotected combustible material, using a torch, is strictly prohibited|| 2020-July-3 }}.
<li>{{hilite | All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials|| 2020-July-3 }}
<ol>
<li>{{hilite | on ''decks'', ''walls'', blocking, and canted edges|| 2020-July-3 }}, and
<li>{{hilite | that are hidden or obscured within voids, cracks, or orifices|| 2020-July-3 }}.
</li></ol>
<li>{{hilite | When a torch-applied membrane is specified over combustible materials, all joints between overlay panels, and at roof-wall transitions, must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes|| 2020-July-3 }}.
<li>{{hilite | Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]|| 2020-July-3 }}.
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====
<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including {{hilite | heat from|| 2021-June-30 }} liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate and mineral wool. Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral wool insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to ASM Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements, with respect to
<ol>
<li>the use of a thermal barrier between the ''roof deck'' and the insulation ''system'', and
<li>the minimum required thermal resistance of the insulation ''system''.
</li></ol>
</li></ol>

====7.1.3.2. General Requirements====
(See [[Notes to ASM Standard#A-7.1.3.2. | Note A-7.1.3.2.]])

<ol>
<li>{{hilite | Selected board insulation products may be used within an architectural sheet metal panel ''roof systems'', provided the panels are listed in || 2023-June-16 }} [[Division_C | Division C]], {{hilite | and conform to the material specifications in || 2023-June-16 }} [[#Section 7.2. Materials | Section 7.2.]]
<li>{{hilite | Insulation may be used below the ''roof deck'' (not part of the ''roof assembly''), provided a ventilation space no less than 63.5 mm (2-1/2"), measured between the underside of the ''roof deck'' and the top face of insulation, is retained beneath the ''deck'' to keep it cool (Ref. the "British Columbia Building Code", Division B, || 2023-June-16 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.1., "Required venting"], and [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]).
<li>{{hilite | Spray foam insulation may not be used directly beneath a wood ''roof deck'' that supports an architectural sheet metal panel ''roof system'', unless the ''manufacturer'', and the '''''Guarantor''''', jointly agree in writing that moisture in the ''roof deck'' can be adequately vented out of the ''roof assembly''. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>{{hilite | Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee'''''), provided || 2023-June-16 }}
<ol>
<li>{{hilite | the ''Design Authority'' has specified its reuse, and || 2023-June-16 }}
<li>{{hilite | the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
(See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>Insulation ''assemblies'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See {{hilite | '''Figure 7.1.3.4.-A'''|| 2026-February-1 }}).
<li>{{hilite | At intersections with insulated curbs and walls, insulation joints at the roof-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See {{hilite | '''Figure 7.3.2.2.-A)'''|| 2026-February-1 }}. || 2023-June-16 }}
<li>{{hilite | ''Insulated systems'' || 2027-February-1 }}{{strike| that utilize metal panel clips shall specify clip attachment|| 2026-January-31 }} {{hilite | should utilize methods of panel clip attachment that minimize thermal bridging and the potential for condensation (See || 2027-February-1 }}[[Notes to ASM Standard#A-7.1.3.4.(4)| {{hilite | Note A-7.1.3.4.(4))|| 2026-February-1 }}]]{{hilite |, including the use of || 2027-February-1 }}
<ol>
<li>{{hilite | mechanically fastened bearing plates which are installed on the top surface of the insulation layers|| 2027-February-1 }}, {{strike| to thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or || 2026-January-31 }}
<li>{{hilite | metal girts placed in the top layer of insulation, secured to the deck with screws penetrating lower layers of insulation|| 2027-February-1 }}, or
<li>{{hilite | thermally non-conductive intermediate or continuous supports that pass through the insulation ''assembly''|| 2027-February-1 }}. {{strike| to mechanically fastened bearing plates which are installed on the top surface of the insulation.|| 2026-January-31 }}
</li></ol>
<li>{{hilite | Where spray foam is specified for use in the roof system, it shall conform to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2027-February-1 }}]] {{hilite |(Also, see Sentence (4), || 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.) || 2027-February-1 }}]].
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Insulated Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.4.1. Reuse of Insulation for Panel Replacement====

<ol>
<li>{{hilite | When a roof is specified for panel replacement only, the existing insulation may be left in place (Subject to the requirements in || 2023-June-16 }} [[#1.1.4.3. Partial Roof Replacement | Article 1.1.4.3.]]), {{hilite | but will be excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
</li></ol>

====7.1.4.2. Protection of Heat-sensitive Insulation====

<ol>
<li>When ''heat-sensitive insulation'' is used in the primary thermal ''assembly'', it must be covered with a ''heat-resistant insulation'' at least 50.8 mm (2”) thick (See [[Notes to ASM Standard#A-7.1.4.2. | Note A-7.1.4.2.]]).
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>The maximum width and length of insulation boards installed with mechanical fasteners is limited only by the ''manufacturer''.
<li>{{hilite | While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''roof system'' from a material handling perspective and consider specifying a thicker panel|| 2021-June-30 }}.
</li></ol>
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.2. Expanded Polystyrene Insulation====

<ol>
<li>Expanded polystyrene ("EPS") is ''heat-sensitive'' and shall conform to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.3. Polyisocyanurate Insulation====
(See [[Notes to ASM Standard#A-7.2.2.3. | Note A-7.2.2.3.]])

<ol>
<li>Polyisocyanurate insulation ("Polyiso") is ''heat-resistant'' and
<ol>
<li>shall conform to CAN/ULC-S704, "Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced", and to ASTM C-1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board",
<li>shall be manufactured with non-organic facers, and
<li>shall be labeled to identify the manufacturer and the date of manufacture.
</li></ol>
</li></ol>

====7.2.2.4. Mineral Fibre Insulation====

<ol>
<li>Mineral fibre insulation ("Mineral wool") is ''heat-resistant'' and shall conform to ASTM C726-17, "Standard Specification for Mineral Wool Roof Insulation Board".
</li></ol>

===={{hilite | 7.2.2.5. Spray Foam Insulation || 2027-February-1 }}====
<ol>
<li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2027-February-1 }}.
<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling minor gaps {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
<li>must be offset at least 304.8 mm (12"), both for adjacent layers and for adjacent row (a minus offset tolerance of 50.8 mm (2") maximum is permissible; see '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2026-February-1 }} {{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.3 Insulation Offset and Staggered.jpg|link=http://rpm.rcabc.org/images/2/28/7.3_Insulation_Offset_and_Staggered.jpg | 500 px]]
|}
 
<li>{{hilite | On exterior insulated walls, insulation joints at the roof-wall interface must be offset and staggered to eliminate thermal bridging|| 2022-February-5 }} ({{hilite | See {{hilite | '''Figure 7.3.2.2.-B''' || 2026-February-1 }}|| 2022-February-5 }}).
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.3.2.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-B (ASM).jpg| link=https://rpm.rcabc.org/images/7/7e/Figure_7.3.2.-B_%28ASM%29.jpg | 500 px]]
|}
 
<li>{{hilite | Where penetrations pass through an insulation system, or where thermally non-conductive intermediate or continuous supports for clips are used, any minor voids less than 25.4 mm (1”) around them must be insulated with a spray foam conforming to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5.|| 2027-February-1 }}]]{{hilite |, to reduce the potential for condensation || 2027-February-1 }}.
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''roof assembly'', calculated to resist the ''Specified Wind Loads'' for the ''roof system''.
<li>{{hilite | When thermally non-conductive clips or bars are utilized on a ''low slope'' roof to retain insulation and support panel clips, they must be embedded in, and fastened through, a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7.]])|| 2021-June-30 }}.
</li></ol>

====7.3.2.4. Protection of Heat-sensitive Insulation====

<ol>
<li>{{hilite | Heat-sensitive insulation must be protected from high temperatures, both during construction and when placed in service, and therefore it must be overlaid with heat-resistant insulation no less than 50.8 mm (2") thick || 2023-June-16 }} (See [[#7.1.4.2. Protection of Heat-sensitive Insulation | Article 7.1.4.2.]]).
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Eave, Valley, and Field Underlayment=
==Section 8.1. Design==

===8.1.1. General===
====8.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====8.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Eave and Valley Protection'' means a self-adhering sheet membrane applied in valleys and in parallel courses {{hilite | on the roof ''deck''|| 2021-June-30 }} along the eaves, up the roof slope to a point measured vertically from the inside of the exterior wall, and intended to block the ingress of water that may leak behind shingles or metal roof panels as the result of snow or ice buildup on the roof surface.
<li>{{hilite | ''Separation Layer'' (sometimes referred to as a "slip sheet") means a roll material installed directly below metal roof panels to|| 2021-June-30 }}
<ol>
<li>{{hilite | inhibit bonding of the metal panels to underlying materials, such as bitumen-based underlayments or ''eave protection'' membranes, or|| 2021-June-30}}
<li>{{hilite | permit the passage of vapour out of the roof system|| 2021-June-30 }} ({{hilite | A ''separation layer'' by itself does not function as a ''ventilation layer''|| 2021-June-30 }}).
</li></ol>
<li>''Underlayment'' means a sheet (rolled) material that is either self-adhering or mechanically fastened (typically with large head nails), and which is installed
<ol>
<li>{{hilite | immediately over the supporting ''deck'' or ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | to provide secondary protection between the ''water-shedding system'' materials and the building interior|| 2021-June-30 }}, and
<li>{{hilite | to keep ''water-shedding system'' materials from adhering to the ''deck''.|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | ''Ventilation Layer''|| 2021-June-30 }} means a layer of roll material, usually comprised of stiff, synthetic entangled mesh, installed directly beneath the metal panels in place of, or in addition to, a ''separation layer''; it forms a ventilation space intended to
<ol>
<li>facilitate the {{hilite | drying|| 2021-June-30 }} of condensation that collects on the bottom surface of metal roof panels, and
<li>inhibit bonding of metal roof panels with underlying materials.
</li></ol>
</li></ol>
</li></ol>

===8.1.2. Guarantee Term Requirements===
====8.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.1.3. All Systems===
====8.1.3.1. Eave Protection====

<ol>
<li>{{hilite | Sheet membrane ''eave protection'' is required on all ''Common Slope'', ''Steep Slope'', and ''Extreme Slope'' roofs, but is not required || 2023-June-16 }}
<ol>
<li>{{hilite | over unheated spaces, and || 2023-June-16 }}
<li>{{hilite | where the roof overhang exceeds 914.4 mm (36") measured along the roof slope from the edge of the roof to the inner face of the exterior ''wall''. || 2023-June-16 }}
</li></ol>
<li>{{hilite |Sheet membrane ''eave protection''|| 2021-June-30 }}
<ol>
<li>must conform to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<li>{{hilite | must be installed on the ''supporting deck'' or on a ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | may also serve as an air barrier or vapour retarder, or as both, when installed in combination with an ''underlayment'' sharing the same performance characteristics|| 2021-June-30 }},
<li>{{hilite | must be at least 1 mm thick when the roof slope exceeds 1:6 (2” in 12”)|| 2021-June-30 }},
<li>{{hilite | shall be at least 3 mm thick when the roof slope is less than 1:6 (2” in 12”)|| 2021-June-30 }}. and
<li>must be carried
<ol>
<li>a minimum of 609.6 mm (24") up inside interior walls (914.4 mm (36") in heavy snow load conditions, and
<li>down the vertical face of the eave and rake edges by at least 50.8 mm (2").
</li></ol>
</li></ol>
</li></ol>

====8.1.3.2. Valley Protection====

<ol>
<li>Valley Protection is required on all ''projects'', shall conform to the requirements for eave protection in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]], and shall be specified to cover the entire valley, even where eave protection is exempt.
</li></ol>

====8.1.3.3. Field Underlayment====

<ol>
<li>''Underlayments'' are required on all Architectural Sheet Metal Panel Systems, and
<ol>
<li>must be self-adhering when the roof slope is equal to or greater than 1:6 (2" in 12") but is less than 1:3 (4" in 12"), and
<li>may be nail-applied or self-adhered when the roof slope is 1:3 (4" in 12") or greater.
</li></ol>
<li>{{hilite | Self-adhered membranes specified for ''low slope'' roofs (slopes less than 1:3 (4" in 12")) must || 2023-June-16 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2023-June-16 }} [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]{{hilite | , and || 2023-June-16 }}
<li>{{hilite | achieve a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")) || 2023-June-16 }}
</li></ol>
<li>{{hilite |Multiple layers of self-adhering ''eave protection'' membrane may be specified to achieve the minimum thickness requirement in this Article, but|| 2021-June-30 }}
<ol>
<li>{{hilite |each layer must be at least 1.4 mm thick,|| 2021-June-30 }} and
<li>{{hilite |layering must be permitted by the '''''Guarantor''''' through a written Variance (Ref. [[#1.1.3.6. Variances | Article 1.1.3.6.]])|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Underlayments for roofs in high snow load conditions are governed by the requirements in || 2026-February-1 }} [[#9.1.3.3. Panel Seams | {{hilite | Article 9.1.3.5. || 2026-February-1 }}]].
</li></ol>

====8.1.3.4. Separation Layer Between Materials====

<ol>
<li>A separation layer {{strike| material || 2026-January-28 }} is required
<ol>
<li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or
<li>{{hilite |when soldering is to be done|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), a|| 2027-February-1 }} {{hilite |vapour-permeable ''separation layer'' {{hilite | conforming to the requirements in [[#8.2.1.4. Separation Materials | Article 8.2.1.4.]]|| 2027-February-1 }} is required between metal panels and insulation.|| 2021-June-30 }}
<li>{{hilite | Self-adhered underlayments that are impermeable, that are used in an uninsulated ''roof assembly'' and which are manufactured with a non-bonding top facer, do not require an additional separation layer|| 2027-February-1 }}.
</li></ol>

====8.1.3.5. Ventilation Beneath Panels====
{{hilite | (See [[Notes to ASM Standard#A-8.1.3.5. | Note A-8.1.3.5.]]. || 2024-January-31 }} {{hilite | Also see [[#8.3.2.6. Ventilation Materials | Article 8.3.2.6.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] for installation requirements) || 2027-February-1 }}

<ol>
<li>{{hilite | A ''ventilation'' {{hilite | (drying) || 2027-February-1 }} ''space'' beneath metal roof panels|| 2021-October-30 }}
<ol>
<li>{{hilite | is required on slopes less than 1:3 (4” in 12”)|| 2021-October-30 }},
<li>is required beneath curved panel ''systems'', and
<li>{{hilite | is recommended when the roof slope exceeds 1:3 (4” in 12”)|| 2021-June-30 }}.
</li></ol>
<li>{{strike| {{hilite | Ventilation beneath panels shall be incorporated into the ''roof system'' design|| 2021-October-30 }} || 2026-January-27 }}{{hilite | A ''ventilation'' (drying) ''space'' beneath panels shall conform to the installation requirements in this Standard and shall be achieved by || 2027-February-1 }}
<ol>
<li>{{hilite | {{strike| by || 2026-January-27 }} supporting the metal panels with entangled mesh {{hilite | conforming to the material requirements in [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]|| 2027-February-1 }}{{strike| that is at least 6.35 mm (1/4”) thick, and by securing the panels using standard panel clips supported on EPDM pads equal in thickness to the entangled mesh (Ref. [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])|| 2021-October-30 }}|| 2026-January-27 }}, or
<li>{{hilite | {{strike| by || 2026-January-27 }} elevating unsupported metal panels above the underlying substrate materials by at least 9.53 mm (3/8”), {{hilite | provided the panels satisfy the requirements in Article 1.1.3.1., Sentence (2)|| 2027-February-1 }}. {{strike| and securing the panels with tall panel clips; this approach does not require EPDM pads and entangled mesh, and is acceptable provided {{strike| the ''Design Authority'' supplies the '''''Guarantor''''' with written engineering certification that || 2023-January-26 }}|| 2021-October-30 }} || 2026-January-27 }}
{{strike| <ol>
<li>{{hilite | the ''Contractor'' provides the '''''Guarantor''''' with written assurance concerning the load-bearing capacity of the panel system (Ref. || 2024-January-31 }} [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], "Submittals"),
<li>{{hilite | clips are fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | bearing plates (when used) are embedded in an acceptable sealant, to prevent water ingress around the screws. || 2024-January-31 }}
</li></ol>
</li></ol>
<li>{{hilite | When tall clips are used as an alternative to EPDM pads, the clips shall be fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | but when bearing plates are used without EPDM pads and support tall clips, the bearing plates shall also be embedded in sealant, to prevent water ingress around the screws. || 2024-January-31 }}

{{strike| <li>{{hilite | the clips will adequately secure and support the elevated panels|| 2021-October-30 }}.
<li>{{hilite | the panels are suitable as spanning members and will support anticipated live loads, including loads during construction|| 2021-October-30 }}. || 2023-January-26 }} || 2026-January-27 }}
</li></ol>
</li></ol>

==Section 8.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===8.2.1. Material Properties===
====8.2.1.1. Suitability of Materials====

<ol>
<li>{{hilite | All materials specified for use in a ''roof system'' must be expressly manufactured for use in a roof and must be listed in Division C (Ref. || 2024-June-15 }} [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.).]]
<li>{{hilite | Materials used for ''eave or valley protection'', as an ''underlayment'', or as a ''separation layer'', must not damage the painted finish of roof panels (a scratched or marred finish may result in panel corrosion)|| 2020-July-3 }}.
<li>{{hilite | When a material not listed in [[Division_C | Division C]] is specified for application in an Architectural Sheet Metal Roof System, the ''Design Authority'' must request a written Variance from the '''''Guarantor'''''|| 2020-July-3 }}.
<li>{{hilite | The ''Design Authority'' must select the most suitable material for eave protection, a separation layer, or as an underlayment, based on || 2024-June-22 }}
<ol>
<li>{{hilite | where the material will be located within the roof assembly, || 2024-June-15 }}
<li>{{hilite | the anticipated service temperature for the material, and || 2024-June-15 }}
<li>{{hilite | the material's published service temperature rating (see || 2024-June-15 }} [[Notes to ASM Standard#A-8.2.1.1.(3) | Note A-8.2.1.1.(3)]]).
</li></ol>
<li>All membranes must be supplied with proprietary sealants, mastics, tapes, and primers, each one suitable for the application of the ''underlayment''.
</li></ol>

====8.2.1.2. Eave and Valley Protection====

<ol>
<li>{{hilite |{{hilite | Bituminous || 2026-February-1 }} sheet membranes used for ''eave and valley protection'' must|| 2021-June-30 }}
<ol>
<li>{{hilite | conform to the requirements in CSA-A123.22, "Self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection," || 2023-June-16 }}
<li>{{hilite | be made of bitumen with a high softening point and a minimum flow temperature of 87.7°C (190°F) when they are used immediately below any metal panels or flashing (Ref. ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material"), || 2023-June-16 }}
<li>be self-adhering, and
<li>{{hilite | have a sanded or synthetic, non-bonding top surface|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Butyl-based sheet membranes used for eave and valley protection shall || 2026-February-1 }}
<ol>
<li>{{hilite | be self-adhering and || 2026-February-1 }}
<li>{{hilite | have a synthetic, non-bonding top surface|| 2026-February-1 }}.
</li></ol>
</li></ol>

====8.2.1.3. Underlayment====

<ol>
<li>{{hilite | Mechanically attached polymeric ("synthetic") fabric underlayments shall conform to the criteria in || 2023-June-16 }} [http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf RGC ACWS-PUL, "RGC Acceptance Criteria for Mechanically Attached Polymeric Roof Underlayments Used in Water-shedding Systems"].
<li>{{hilite | {{hilite | Self-adhering modified bituminous or butyl-based || 2026-February-1 }} sheet membrane underlayments must conform to the requirements in [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]] {{hilite | and || 2024-January-31 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]|| 2022-June-17 }}
</li></ol>
</li></ol>

====8.2.1.4. Separation Layer====

<ol>
<li>{{hilite | Separation layer materials || 2027-February-1 }}
<ol>
<li>{{hilite | must be manufactured as rolled goods and shall resist bonding with the underside of metal panels, and || 2027-February-1 }}
<li>{{hilite | may be self-adhered or loose laid || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Breathable separation layers shall be manufactured to allow the passage of water vapour through the material and therefore shall have a minimum permeability rating of 5 perms, tested and validated using ASTM E96/E96M-22a, "Standard Test Method for Gravimetric Determination of Water Vapour Transmission Rate of Materials" (products with a US permeability rating less than 5 perms are considered impermeable and therefore unsuitable as separation materials in insulated roof systems) || 2027-February-1 }}.
<li>{{hilite | Entangled mesh || 2023-June-16 }} (See [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]), {{hilite | which is commonly used for ventilation immediately beneath metal panels, may also serve as a separation (bond-breaking) material. || 2023-June-16 }}
</li></ol>

====8.2.1.5. Ventilation Materials====

<ol>
<li>{{hilite | Entangled mesh used in a ventilation cavity must {{strike| be || 2025-February-1 }}|| 2021-October-30 }}
<ol>
<li>{{hilite | be manufactured from polymeric filaments that fuse where they intersect|| 2026-February-1 }},
<li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
<li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.
</li></ol>

====8.2.1.6. Fasteners====

<ol>
<li>Mechanical fasteners used to secure nail-applied underlayments must conform to the underlayment manufacturer’s requirements.
<li>Staples are not permitted.
</li></ol>

==Section 8.3. Application==
===8.3.1. Guarantee Term Requirements===
====8.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.3.2. All Systems===
====8.3.2.1. Installation of Eave Protection====

<ol>
<li>{{hilite | Where ''eave protection'' is required, it must || 2023-June-22 }}
<ol>
<li>{{hilite | overhang the fascia by at least 25.4 mm (1”), || 2023-June-22 }}
<li>{{hilite | extend up the slope at least 914.4 mm (36"), or to a line not less than 609.6 mm (24") inside the inner face of the exterior wall || 2023-June-22 }} (914.4 mm (36") in regions with heavy snow; see {{hilite | '''Figure 8.3.2.1.-A''' || 2026-February-1 }}), and
<li>{{hilite | extend up all abutments (walls, skylights, etc.) at least 152.4 mm (6″) above the surface of the ''finished system surface''. || 2023-June-22 }}
</li></ol>
<li>{{hilite | Horizontal runs of ''eave protection'' must be positively lapped at least 50.8 mm (2″) and end laps (vertical joints) must be at least 152.4 mm (6″). || 2023-June-22 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 8.3.2.1.-A Eave Protection Requirements''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 8.3.2.1.(1) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File: Figure 8.3.2.-A (ASM).jpg | link=https://rpm.rcabc.org/images/1/17/Figure_8.3.2.-A_%28ASM%29.jpg | 500 px]]
|}

====8.3.2.2. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membranes must|| 2021-June-30 }}
<ol>
<li>{{hilite | be the same materials used for ''eave protection'', conforming to the requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],|| 2021-June-30 }},
<li>{{hilite | be centred on,|| 2021-June-30 }} and installed parallel to, the valley line, extending from the eave edge past the upper end of the valley metal flashing, at least 50.8 mm (2”),
<li>{{hilite | be at least 990.6 mm (39”) wide and centred on the valley|| 2021-June-30 }},
<li>positively overlap lower runs of valley membrane by no less than 152.4 mm (6”), rolled to ensure even, full adhesion, and
<li>{{hilite | positively lap and seal to the ''eave protection'' membrane|| 2021-June-30 }}.
</li></ol>
</li></ol>

====8.3.2.3. Underlayment for Common and Steep Slopes====

<ol>
<li>All nail-applied polymeric ("synthetic") ''underlayments'' installed on slopes less than 2:3 (8” in 12”)
<ol>
<li>shall be installed using fasteners acceptable to the manufacturer of the ''underlayment'',
<li>shall be secured to conform to the ''underlayment'' manufacturer's published instructions,
<li>must run parallel to the eave,
<li>shall positively overlap adjacent material by
<ol>
<li>at least 76.2 mm (3″) along the sides, unless exceeded by the ''manufacturer’s'' instructions, and
<li>at least 152.4 mm (6″) at the ends, unless exceeded by the ''manufacturer’s'' instructions,
</li></ol>
<li>must run beneath all ''water-shedding system'' materials, irrespective of slope,
<li>must extend beneath all perimeter ''linear metal flashing'',
<li>shall cover the roof deck beneath all penetration flashings, and
<li>must be carried up vertical surfaces at least 152.4 mm (6”) above the ''roof deck'', where roofing materials and flashings adjoin walls or curbs.
</li></ol>
<li>"Negative" laps that are unavoidable in horizontally applied courses of ''underlayment'' are permissible, but only when
<ol>
<li>the ''underlayment'' is a self-adhering membrane (Ref. [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]),
<li>the membrane runs overlap at least 152.4 mm (6"), and
<li>lapped seams are roller-pressed and sealed with a compatible sealant along the seam edge.
</li></ol>
<li>Installing nail-applied polymeric ("synthetic"), self-adhered bituminous, or butyl ''underlayments'' perpendicular to the eave is permissible but the laps must be self-sealing or must be sealed with a suitable lap cement provided by the underlay manufacturer.
<li>When an ''underlayment'' is installed perpendicular to the eave and the roof slope exceeds 2:3 (8” in 12”), the ''underlayment''
<ol>
<li>shall be self-adhering,
<li>must extend beyond the furthermost edge of the flashing at least 101.6 mm (4"), and
<li>shall positively laps beneath other vertical membranes.
</li></ol>
</li></ol>
</li></ol>

====8.3.2.4. Underlayment for Slopes Less Than 1:3====

<ol>
<li>All roofs sloped less than 1:3 (4" in 12") must be covered with one or more layers of self-adhered or thermally fused ''underlayment'' membrane,
<ol>
<li>conforming to the material requirements in [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>achieving a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")), and
<li>installed to conform to the requirements in [[#8.3.2.4. Underlayment for Slopes Less Than 1:3 | Article 8.3.2.4.]]
</li></ol>
<li>{{hilite |Applying multiple layers of self-adhering ''eave protection'' membrane to achieve the minimum thickness requirement is permissible, provided|| 2021-June-30 }}
<ol>
<li>layering is acceptable to the underlayment manufacturer,
<li>{{hilite |the second layer is offset from the first by at least 304.8 mm (12"), both horizontally and vertically,|| 2021-June-30 }} and
<li>{{hilite | the ''Design Authority'' has obtained a written Variance from the '''''Guarantor''''' permitting multiple layers. || 2023-June-16 }}
</li></ol>
</li></ol>

====8.3.2.5. Separation Materials====

<ol>
<li>Horizontal runs of separation materials must be positively lapped at least 50.8 mm (2"), and vertical end joints must be lapped at least 152.4 mm (6").
</li></ol>

====8.3.2.6. Ventilation Materials====

<ol>
<li>{{strike| ''Roof systems'' that require a ventilation space shall conform to the design specifications and required in [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]] || 2026-January-27 }}{{hilite | Ventilation materials shall be installed to conform to [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] || 2027-February-1 }}
</li></ol>

<hr>
<div id=PART_9></div>

=Part 9 - Roof Field (Panel Systems)=

==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary roof covering, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed using only RoofStar-accepted panels (or panels manufactured with a RoofStar-accepted roll forming machine) secured with a hidden clip system; flange-fastened panels may not be specified or installed.
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====
(See [[Notes to ASM Standard#A-9.1.3.1.| Note A-9.1.3.1.]])

<ol>
<li>Shop drawings for each ''project'' detail, which may be drawn by the ''Contractor'', must be reviewed by the Accepted observer and returned to the ''Guarantor'', verifying conformity to the '''''RoofStar Guarantee Standards''''' prior to the start of construction.
<li>Each construction detail must be reviewed during a field review and documented in the observer's RGC field review report, to verify conformity to the '''''RoofStar Guarantee Standards'''''.
<li>A system designed with a slope less than 1:6 (2" in 12") must conform to the limitations and conditions in [[#2.1.3. All Systems | Subsection 2.1.3.]]

<li>{{hilite | Metal panel seam types must conform to the following permissible applications and length limitations, to '''Table 9.1.3.3.-A''', and to any other seam requirements in this Part, to qualify for a '''''RoofStar Guarantee'''''|| 2027-June-11 }}:
<ol>
<li>{{hilite | Mechanically locked standing seams utilizing concealed clips ('''Figure 9.1.3.1.-A''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used on roof slopes 1:6 (2” in 12”) or greater (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies || 2027-June-22 }},
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]]|| 2027-June-11 }},
<li>{{hilite | may be permitted for slopes less than 1:6, but this is subject to a Variance review (See Variance requirements in [[#2.1.3. All Systems | Subsection 2.1.3.]])|| 2027-June-11 }},
<li>{{hilite | shall be seamed with butyl when the primary slope is 1:4 (3” in 12”) or less (See '''Table 9.1.3.3.-A'''; also see [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]] and '''Figure 9.3.2.4.-A''') and|| 2027-June-11 }}
<li>{{hilite | are the only seams permitted in locations with high snow loads (for more about high snow load conditions, see [[#9.1.3.5. Roofs in High Snow Load Conditions | Article 9.1.3.5.]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams utilizing concealed clips ('''Figure 9.1.3.1.-B''') || 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-cap seams utilizing concealed clips ('''Figure 9.1.3.1.-C''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams on flange-fastened panels ('''Figure 9.1.3.1.-D''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be installed only in uninsulated assemblies|| 2027-June-11 }},
<li>{{hilite | are permissible only on roof slopes greater than 1:3 (4" in 12"), and|| 2027-June-11 }}
<li>{{hilite | are limited to a maximum length of 9144 mm (30’)|| 2027-June-11 }}.
</li></ol>
<li>The ''Design Authority'' must calculate the maximum panel length based on
<ol>
<li>the material type,
<li>the direction of expansion and contraction that is determined by the location of drag load fasteners, and
<li>the amount of expansion and contraction provided by
<ol>
<li>the fastener slot on the fastening flange, or
<li>the concealed expansion clip slot.
</li></ol>
</li></ol>
<li>Panels must be able to withstand loads as required in [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>Panels must be solidly supported (See '''Figure 9.1.3.1.-A''' (1 and 2)), unless
<ol>
<li>the panel is made to be self-supporting (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]; also see [[#9.2.1.1. Panel Grade, Gauge, and Fabrication | Sentence 9.2.1.1.(9)]]), or
<li>a ventilation space is required and the panels are suitably supported with entangled mesh (See [[#8.1.3.5. Ventilation Beneath Panels
| Article 8.1.3.5.]]; also see '''Figures 9.3.2.5-A''' through '''F''' in [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration) || colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]] || [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|-
|}

====9.1.3.2. System Securement====

<ol>
<li>{{hilite | Panel shape and securement must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]).
<li>Metal panels must be pinned to the structure with fasteners, to prevent slippage down the roof because of the weight of the ''roof system'' ("drag loads").
</li></ol>

====9.1.3.3. Panel Seams====

<ol>
<li>Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}.
</li></ol>
 
::::::::::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights''' || 2026-February-1 }} {{hilite | Forming Part of Article 9.1.3.3. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! {{hilite | Conditions || 2026-February-1 }} (see also Part 2) !! Seam Height Minimums !! Permissible Seam Types
|-
| 1:3 (4" in 12") or greater || 25.4 mm (1") || All
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 1:6 (2" in 12") to (less than) 1:3 (4" in 12") || 38.1 mm ( 1-1/2”) || Mechanical Lock only (single or double)
|-
| 41.28 mm ( 1-5/8”) || Snap Lock (male seam)
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender) || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || Mechanical Lock only (single or double)
|-
| 50.8 mm (2”) || Mechanical Lock only (double)
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | Power-curved panels (reviewed by RGC prior to tender) || 38.1 mm (1-1/2”) + butyl sealant in seam || Mechanical Lock only (single or double)
|-
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | {{hilite | Locations with High Snow Loads (defined in Article 1.1.3.3.) || 2026-February-1 }} || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || {{hilite | Mechanical Lock only (double) || 2026-February-1 }}
|}

====9.1.3.4. Curved Panel Systems====
(See [[#9.3.2.8. Curved Panels | Article 9.3.2.8.]])

<ol>
<li>Curved panel systems
<ol>
<li>are permissible, but because a curved system diminishes in slope to a zenith of 0°, the design must be submitted to the '''''Guarantor''''' prior to tender (See [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>may be specified with a minimum seam height of 38.1 mm (1-1/2") (subject to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>must continuously cover a curved substrate; segmented panels are not permissible, and
<li>must incorporate a ventilation space (see [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]).
</li></ol>
<li>{{hilite | Stiffeners are optional for curved panels, and when they are desired, the ''Design Authority'' should consult with the ''Contractor'' about stiffener profiles that can be power-curved. || 2023-June-16 }}
</li></ol>

===={{hilite | 9.1.3.5. Roofs in High Snow Load Conditions || 2026-February-1 }}====
<ol>
<li>Roofs subject to high snow loads ([[#1.1.3.3. Snow Loads | Article 1.1.3.3.]]) require
<ol>
<li>full support for metal panels,
<li>a self-adhered underlayment conforming to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] and [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>metal panels seams
<ol>
<li>with a height no less than 50.8 mm (2”) (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>that are double-locked, and
<li>sealed with butyl (See [[#9.3.2.4. Panel Securement and Seam | Sentence 9.3.2.4.(7)]]),
</li></ol>
<li>valleys conforming to [[#10.1.5.3. Valleys for Heavy Snow Load | Article 10.1.5.3.]], and
<li>placement of penetrations near the ridge line of the roof.
</li></ol>
<li>Insulated (above the roof deck; see [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]]) architectural sheet metal roofs must be designed to conform to the requirements in Sentence (1) and shall be designed with slopes equal to or greater than 1:1.5 (8” in 12”) and must permit the free discharge of snow from the roof, except where life safety is concerned.
<li>A roof with slopes less than 1:1.5 (8” in 12”) shall conform to the requirements in Sentence (1) and must be designed as a vented (cold) roof in which
<ol>
<li>the vented space above the insulation assembly shall be determined by a Building Envelope Consultant but shall not be less than 76.2 mm (3”)
<li>the supporting deck for the metal panel system is plywood with a minimum thickness of 19.05 mm (3/4”) (thickness is subject to the engineering requirements in Sentence (2)),
<li>the underlayment is self-adhering and possesses a minimum thickness of
<ol>
<li>1.0 mm when it is butyl-based,
<li>1.5 mm when it is bituminous, or
<li>3.0 mm when the slope is less than 1:6 (2” in 12”) (See [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]]), and
</li></ol>
<li>entangled mesh and EPDM pads are capable of supporting the anticipated loads from snow and other service conditions, without deformation (See [[#8.2.1.5. Ventilation Materials | Articles 8.2.1.5.]] and [[#9.2.1.6. EPDM Pads | Article 9.2.1.6.]]).
</li></ol>
</li></ol>

===9.1.4. Insulated Systems===
====9.1.4.1. General Requirements====

<ol>
<li>{{hilite | Insulated ''Architectural Sheet Metal Roof Systems'' || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-22 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]),
<li>{{hilite | shall conform to all other requirements in this Standard, || 2023-June-16 }} and
<li>{{hilite | shall minimize or eliminate thermal bridging, using thermally non-conductive clips or bars, or by using mechanically fastened bearing plates || 2023-June-16 }} (see [[#Part 7 - Insulation | Part 7, "Insulation"]]).
</li></ol>
</li></ol>

===9.1.5. Uninsulated Systems===
====9.1.5.1. General Requirements====

<ol>
<li>{{hilite | Uninsulated Architectural Sheet Metal Roof Systems || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]), and
<li>{{hilite | shall conform to all other requirements in this Standard. || 2023-June-16 }}
</li></ol>
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===9.2.1. Material Properties===
====9.2.1.1. Panel Grade, Gauge, and {{strike| Selection || 2025-February-1 }} {{hilite | Fabrication || 2026-February-1 }}====

<ol>
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06, CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06, ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
<li>'''Aluminum-Zinc alloy-coated steel''': 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06, CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>{{hilite | All panels must be factory-manufactured, or site-fabricated by an accepted ''Contractor'', and listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Metal panels must be fabricated to fully span the distance from eave to ridge, unless interrupted by ''curbs'', ''walls'', or penetrations || 2026-February-1 }}.
<li>{{hilite | Notwithstanding Sentence (4), curved metal panels, including metal panels over barrel-shaped structures (See|| 2026-February-1 }} [[#2.1.3.1. General Requirements for Roof Slope | {{hilite | Sentence 2.1.3.1.(3)|| 2026-February-1 }}]] {{hilite | concerning pre-tender reviews by the '''''Guarantor'''''), may be manufactured in segments when || 2026-February-1 }}
<ol>
<li>{{hilite | panel lengths are too long to be practicable (for example, on a barreled roof), or|| 2026-February-1 }}
<li>{{hilite | the panel material’s coefficient of thermal expansion will induce movement that exceeds the capacity of panel clips (See also|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) | {{hilite | Note A-9.2.1.1.(5)(2))|| 2026-February-1 }}]],
{{hilite | but this is permissible only when|| 2026-February-1 }}
<ol>
<li>{{hilite | the ''Design Authority'' requests a written Variance from the '''''Guarantor''''' prior to tendering the project|| 2026-February-1 }},
<li>{{hilite | the roof slope at the point of division is not less than 1:2 (6” in 12”) (See '''Figure 9.2.1.1.-A'''; also see|| 2026-February-1 }} [[Notes to ASM Standard#Note A-9.2.1.1.(5)(4) | {{hilite | Note A-9.2.1.1.(5)(4)|| 2026-February-1 }}]]{{hilite | ), || 2026-February-1 }}
<li>{{hilite | the transition flashing between panel segments has a slope of at least 1:3 (4” in 12”) (See '''Figure 9.2.1.1.-B'''), and || 2026-February-1 }}
<li>{{hilite | the ''Contractor'' has submitted to the '''''Guarantor''''' the engineered shop drawings showing the detailing of the division of metal panels, as part of the request for a written Variance|| 2026-February-1 }}.
</li></ol>
</li></ol>
<li>Sheet steel, copper and zinc roof panels may be roll-formed to a maximum width of 500 mm (20”).
<li>All metal roof panels over 304.8 mm (12”) in width must be roll-formed or factory-fabricated with stiffening ribs or striations.
<li>Panels fabricated with perforated fastening holes or slots must not exceed 9144 mm (30’) in length.
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath the panels that are not supported by a ''ventilation layer'', and tall clips are used to support the raised panels, the panels must be engineered to support anticipated live loads without permanent deformation (Ref. [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-A Segmented Curved Metal Panels Showing Transition Flashing''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-B Minimum Slope Requirements for Segmenting Curved Metal Panels''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 9.2.1.1.-A.png | link=https://rpm.rcabc.org/images/e/ef/ASM_Figure_9.2.1.1.-A.png | 450 px]] || [[File:ASM Figure 9.2.1.1.-B.png | link=https://rpm.rcabc.org/images/c/ca/ASM_Figure_9.2.1.1.-B.png | 450 px]]
|}

====9.2.1.2. Roll Forming Machines and Mill Certificate====

<ol>
<li>All machines used by a ''Contractor'' to fabricate metal panels shall be owned by a ''Contractor'', and shall be accepted by the '''''Guarantor'''''.
<li>Site-forming metal panel machines
<ol>
<li>must be certified annually by a third-party engineer,
<li>must be serviceable, maintained and calibrated with supporting documentation, and
<li>records documenting the serviceable condition of the machine must be submitted annually to the '''''Guarantor'''''.
</ol></li>
<li>''Contractors'' who own metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.
<li>the ''Contractor'' must provide a mill certification for all metal roofing ''projects'' installed under the '''''RoofStar Guarantee Program'''''.
<li>Mill certificates must confirm that the sheet metal used for forming metal panels and ''linear metal flashings'' conform to or exceeds the requirements in [[#9.2.1.1. Panel Grade, Gauge, and Selection | Article 9.2.1.1.]]
</ol></li>

====9.2.1.3.{{hilite | Pre-painted Finishes|| 2022-February-5 }}====

<ol>
<li>{{hilite | When a painted finish on G90 galvanized or AL-Zn alloy coated steel panels is specified, SMP pre-painted finishes are permissible but|| 2022-February-5 }} {{hilite | PVDF (polyvinylidene fluoride, also referred to as PVF2) is strongly recommended for durability and resilience|| 2022-February-5 }}.
</li></ol>

====9.2.1.4.{{hilite | Fasteners|| 2022-February-5 }}====
(See also [[#3.2.2.1. Fasteners | Article 3.2.2.1.]])

<ol>
<li>Fasteners used to secure metal panels or clips must be
<ol>
<li>specified by the ''Design Authority'',
<li>compatible with the material they contact,
<li>appropriately sized, in both length and thread type, for the material to which they will be secured, and
<li>corrosion-resistant screws with a low-profile head.
</li></ol>
</li></ol>

====9.2.1.5.{{hilite | Clips {{hilite | and Bearing Plates || 2025-January-31 }}|| 2022-February-5 }}====
(See [[Notes to ASM Standard#A-9.2.1.5.| Note A-9.2.1.5.]])

<ol>
<li>Clips must be
<ol>
<li>{{strike| proprietary (not shop fabricated) || 2024-February-1 }} {{hilite | engineered || 2025-January-31 }} and must be acceptable to the roll form machine manufacturer, for use with Architectural Sheet Metal Roof Systems, and
<li>compatible with the metal panel and other materials they contact.
</li></ol>
<li>Attachment clips for Architectural Sheet Metal Roof Systems shall be manufactured with evenly spaced indents or guide holes for fastener placement, and {{strike| must || 2024-February-1 }} {{hilite | may || 2025-January-31 }} be formed from
<ol>
<li>Steel (Z275 or G90)(AZ50 or AZM150),
<li>Aluminum, or
<li>Stainless Steel.
</li></ol>
<li>{{hilite | Bearing plates shall be || 2025-January-31 }}
<ol>
<li>{{hilite | sufficiently rigid to resist distortion in service, and || 2025-January-31 }}
<li>{{hilite | engineered and suitable to support all expected loads, including compression loads || 2025-January-31 }}.
</li></ol>
</li></ol>

===={{hilite | 9.2.1.6. {{strike| Bearing Plates and || 2024-February-1 }} EPDM Pads || 2025-January-31 }}====

<ol>
{{strike| <li>{{hilite | Bearing plates shall be || 2023-June-16 }}
<ol>
<li>{{hilite | manufactured from corrosion-resistant steel, || 2023-June-16 }}
<li>{{hilite | of sufficient gauge to resist distortion under load, conforming to the engineered shop drawings, || 2023-June-16 }}
<li>{{hilite | formed with recesses for fasteners, || 2023-June-16 }} and
<li>{{hilite | press-formed to bevel the edges, for load distribution over the substrate. || 2023-June-16 }}
</li></ol> || 2024-February-1 }}
<li>{{hilite | EPDM pads used to support panel clips|| 2021-June-30 }}
<ol>
<li>{{hilite | must be sufficiently dense and thick (after compression)|| 2021-June-30 }}
<ol>
<li>{{hilite | to equal the thickness of the ventilation layer (Ref. [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]),|| 2021-June-30 }} and
<li>to resist curling when placed under load.
</li></ol>
<li>shall extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
</li></ol>

====9.2.1.7. {{hilite |Sealants|| 2022-February-5 }}====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</li></ol>
<li>Sealants shall conform to any one of the following standards:
<ol>
<li>CGSB 19-GP-5M, "Sealing Compound, One Component, Acrylic Base, Solvent Curing"
<li>CAN/CGSB-19.13, "Sealing Compound, One Component, Elastomeric, Chemical Curing"
<li>CGSB 19-GP-14M, "Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing"
<li>CAN/CGSB-19.24, "Multi-Component, Chemical Curing Sealing Compound"
</li></ol>
</li></ol>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the roof surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1., "Use of Accepted Materials"]]).
<li>The ''Contractor'' must retain factory packaging or provide other adequate covering for metal panels, to protect them from condensation between adjacent surfaces, until the panels are installed.
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Roof Panel Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer''.
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite | be constructed only with RoofStar-accepted panels secured by hidden clips; flange-fastened panels are not permitted|| 2022-February-5 }}.
</li></ol>
</li></ol>

===9.3.2. All Systems===
===={{hilite | 9.3.2.1. Preparation of Substrate || 2023-June-16 }}====

<ol>
<li>All supporting decks must be acceptable to the ''manufacturer'' and must be
<ol>
<li>made suitable for roofing by others (trades other than the ''Contractor''),
<li>dimensionally stable,
<li>structurally sound,
<li>capable of accommodating ''roof system'' component movement,
<li>clean,
<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[ASM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
<li>reasonably smooth and free of abrupt elevation changes, and
<li>absolutely free of
<ol>
<li>dust,
<li>dirt,
<li>voids,
<li>open cracks,
<li>sharp projections,
<li>contaminants,
<li>objectionable surface treatments,
<li>laitance (concrete must be “native”),
<li>oil, and
<li>grease
</li></ol>
</li></ol>
<li>All concrete decks must cure at least 28 days before receiving adhered membranes, but this limitation may be reduced if both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record ("adhered", as used in this requirement, means fully or intermittently bonding any membrane to the deck with an adhesive, hot asphalt (bitumen), or heat),
<li>Plywood decks with cracks or loose knots must be filled or overlaid with plywood (See [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]).
<li>Joints between plywood deck panels must be prepared and reinforced according to the manufacturer’s published requirements.
<li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
</li></ol>

====9.3.2.2. Preparation of Roofing Materials====

<ol>
<li>{{hilite | Roofing materials must be prepared for installation as required by the ''manufacturer''. || 2023-June-16 }}
</li></ol>

====9.3.2.3. General Requirements for Panel Installation====

<ol>
<li>Panels must be handled with non-marring slings and hoisted using a spreader bar.
<li>Sheet steel, copper, and zinc roof panels must be installed with a continuous minimum tolerance gap of 1/8” between the heels of the panels.
</li></ol>

====9.3.2.4. Panel Securement and Seams====

<ol>
<li>Panels must be secured to resist
<ol>
<li>{{hilite | ''Specified Wind Loads'' calculated for the ''roof system'' and shall conform to the specified design for the ''roof assembly'', and || 2023-June-16 }}
<li>{{hilite |gravitational (drag) loads|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}{{hilite | (including panels over a ventilation space) must|| 2027-June-11 }}
<ol>
<li>{{hilite | be secured to a firm support {{hilite | (bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]])|| 2027-June-11 }}, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate {{hilite | (See '''Figure 9.3.2.4.-A''')|| 2027-June-11 }}, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}
{{strike| {{hilite | All panels must be secured to a firm support, and when clips are used to secure metal panels, the clips must be firmly supported by the roof deck, bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' || 2023-June-16 }} (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).|| 2026-June-11 }}
<li>{{hilite | Clips that are unsupported by EPDM pads must be sealed against water intrusion by embedding the clips in a compatible sealant (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
<li>Unless otherwise permitted by the '''''Guarantor''''', clips must be attached by at least two fasteners (Ref. [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>Concealed fasteners shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and should provide clearance for the underside of the metal panel.
<li>Seam height shall conform to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }} of this Part.
<li>{{hilite | Where sealant is required in panel seams (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}), it shall be applied to evenly engage the top of the seam where panels join, as illustrated in '''Figure 9.3.2.4.-A.''' || 2025-January-31 }}
<li>Flange-fastened panels must be secured
<ol>
<li>only through the manufactured slots in the flange, and shall not be fastened through any other part of the panel (except where drag load securement is required),
<li>with screws placed in the slots to allow for panel movement based on the coefficient of expansion, and
<li>in keeping with the engineered shop drawings.
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.3.2.4.-A Butyl Sealant in Seams''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 9.3.2.4.(7) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:ASM Figure 9.3.2.4.-A.png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6b/ASM_Figure_9.3.2.4.-A.png | 500 px]]
|}

====9.3.2.5. Panels Over Ventilation Materials or Voids====
(See [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])

<ol>
<li>When the roof is designed and constructed with {{hilite | a void or ventilation materials immediately beneath the metal panels, panels must be secured using|| 2021-June-30 }}
<ol>
<li>standard-height clips (matching the height of panel seams), which must be {{strike| fully supported || 2024-January-25 }} {{hilite | installed || 2025-January-31 }} {{hilite | on engineered bearing plates fully supported by appropriately sized || 2025-January-31 }} closed-cell {{hilite | EPDM {{strike| foam || 2024-January-24 }} pads|| 2025-January-31 }}, or
<li>{{hilite |tall clips, which must be|| 2021-June-30 }}
<ol>
<li>{{hilite |fabricated to match the combined height of the {{hilite | bearing plate || 2025-January-31 }}, EPDM {{strike| foam || 2024-January-24 }} pad, and the panel seam,|| 2021-June-30 }}
<li>secured with fasteners into their supports, and
<li>fully embedded in a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7., "Sealants"]]).
</li></ol>
</li></ol>
<li>EPDM foam pads employed to support standard-height panel clips are not a RoofStar-accepted material but nevertheless must
<ol>
<li>be fabricated with sufficient density and thickness (after compression) to equal the thickness of the ''ventilation layer'', and
<li>extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath panels that are not supported by a ''ventilation layer'', panels shall be supported by tall clips secured in keeping with the requirements in this Part|| 2021-June-30 }}.
</li></ol>

====9.3.2.6. Panel Terminations====

<ol>
<li>Metal panels must be secured at, {{hilite | and engaged to|| 2021-June-30 }}, the eaves by a continuous metal hook strip (see [http://rpm.rcabc.org/index.php?title=ASM_10.1.1_Eave_%26_Rake_Flashing_(Mechanical_Seam) ASM 10.1.1 Eave & Rake Flashing (Mechanical Seam)]).
<li>{{hilite | All panel terminations at the top of a slope must be|| 2021-June-30 }}
<ol>
<li>turned up (bread-panned) to {{hilite | match the panel seam|| 2021-June-30 }} height, and shall not be cut, and
<li>{{hilite |flashed with a positively shedding cap, hip or ''wall'' flashing (see [[#10.3.4. Perimeter Details, Walls, and Openings | Subsection 10.3.4., "Perimeter Details, Walls, and Openings"]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |When panels terminate at the top of a ''common slope'' or ''low slope'' roof (slopes up to and less than 1:1 (12” in 12”)), they must be closed with additional metal Z-closure|| 2021-June-30 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened to the metal roof panel, or fastened through the panel into the ''deck'' when the fasteners also serve as drag load securement|| 2021-June-30 }}.
</li></ol>
</li></ol>

====9.3.2.7. Reserved====
====9.3.2.8. Curved Panels====
(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])

<ol>
<li>All panels manufactured for a curved substrate
<ol>
<li>must be supported by a Variance issued by the '''''Guarantor''''' prior to tender (see [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>must be power-curved as a continuous panel, without segments,
<li>shall be manufactured with seams conforming to [[#9.1.3.3. Panel Seams | Article 9.1.3.3.]], and
<li>must continuously cover a curved substrate (segmented panels are not permissible).
</li></ol>
<li>Roofs constructed with curved panels must incorporate a ventilation space in keeping with [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]
</li></ol>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify {{hilite | the connections between the ''roof system'' and ''walls'' or other building components, particularly where the continuity of air, vapour and water-resistive layers is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]|| 2021-October-30 }}).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>{{hilite | Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Where the roof deck and an adjoining wall are constructed of dissimilar materials (i.e., steel deck joined to concrete wall), differing expansion and contraction rates for the two materials may adversely affect the roof system and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular roof-wall intersection || 2023-June-16 }} (See [[Notes to ASM Standard#A-10.1.3.1. | Note A-10.1.3.1. ]]).
<li>{{hilite | When EIFS cladding is cut to permit roofing work, the exposed insulation must be restored with back-wrapped mesh, a base coat and finish coat, or with another method that is equal or superior|| 2022-October-22 }} (See [[Notes to ASM Standard#A-10.1.2.2| Note A-10.1.2.2]]).
<li>Fascia may be covered with metal flashing and specified as part of the ''roof system''.
</li></ol>

====10.1.3.2. Flashing====

<ol>
<li>All changes in plane in the ''roof system'', and all intersections between the roof field and roof edges, ''walls'', or ''parapets'', must be flashed with {{hilite | material conforming to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]] {{strike| self-adhering sheet membrane eave protection, and with metal flashing || 2023-January-26 }}
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings designed for ''common slope'' and ''low slope'' roofs (slopes up to and including 1:1 (12” in 12”)) must be secured with hooked metal Z-closures which are || 2021-June-23 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Cap and hip flashings designed for ''steep slopes'' (roofs with a slope greater than 1:1 (12” in 12”)) may be|| 2021-June-30 }}
<ol>
<li>{{hilite | secured with metal Z-closures installed in keeping with the requirements in [[#10.3.4.1. Ridges | Article 10.3.4.1.]]|| 2021-June-30 }}, or
<li>{{hilite | secured to the standing seams with acceptable fasteners (flashing may be turned down between panel ribs to close off openings, to provide further protection from the weather)|| 2021-June-30 }}.
</li></ol>
</li></ol>

====10.1.4.2. Eave and Rake Edges====

<ol>
<li>Eave and rake edge details shall
<ol>
<li>be designed to resist wind uplift loads, and shall conform to the requirements in [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]], and
<li>{{hilite | permit the drainage of any liquid water out of the roof system (Ref. || 2023-October-28 }} [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====10.1.4.3. Walls====

<ol>
<li>Roof-to-wall flashings must
<ol>
<li>be engineer-designed to resist wind uplift, and
<li>allow for expansion and contraction.
</li></ol>
<li>All connecting flashings must be firmly secured
<ol>
<li>{{hilite |to a ''wall'' using a concealed continuous clip fastened at intervals not exceeding 304.8 mm (12”) O.C. (exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite |to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape, and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
</li></ol>

====10.1.4.4. Reserved====
====10.1.4.5. Windows and Wall Openings====

<ol>
<li>{{hilite | Windows and other wall openings adjacent an Architectural Sheet Metal Roof System shall conform to the relevant requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", || 2023-June-16 }} [[SBS_Roof_Systems_Standard#10.1.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.1.4.5.]].
</li></ol>

===10.1.5. Valleys===
====10.1.5.1. {{hilite | General Requirements for Valleys || 2026-February-1 }}{{strike| Valley Protection Membrane || 2025-February-1 }}====

<ol>
<li>{{hilite | Valleys should not terminate downslope at a wall or curb || 2026-February-1 }}.
<li>{{hilite | When the slope of a valley is less than 1:6 (2” in 12”) the ''Design Authority'' should consider designing the valley with a waterproofing membrane system rather than with a self-adhering underlayment and metal valley flashing || 2026-February-1 }} {{hilite | (See|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) (Metal Panels and the Coefficient of Thermal Expansion) | {{hilite | Note A-10.1.5.1.(2)|| 2026-February-1 }}]]).
{{strike| <li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]] || 2025-February-1 }}
</li></ol>

====10.1.5.2. Valley {{hilite | Protection || 2026-February-1 }}{{strike| Flashing || 2025-February-1 }}====

<ol>
<li>All valleys must be designed with both membrane flashing and metal valley flashing.
<li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]]
<li>Metal flashing must
<ol>
<li>incorporate a divider measuring at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider, and
<li>be secured to resist gravitational ("drag") loads.
</li></ol>
<li>Metal valley flashing shall be at least 127 mm (5") wide, measured between the divider and the edge of the metal roof panel, and may be either hooked or unhooked (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]).
</li></ol>

====10.1.5.3. Valleys for Heavy Snow Loads====

<ol>
<li>In regions with high snow loads, the minimum valley width should be increased and flared to widen at the eave (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]], and [[#10.1.5.1. Valley Protection Membrane | Article 10.1.5.1.]]).
</li></ol>

====10.1.5.4. Reserved====
====10.1.5.5. {{hilite | Crickets and|| 2026-February-1 }} Dead Valleys====
{{hilite | (See '''Figure 10.1.5.5.-A''' and '''Figure 10.1.5.5.-B''')|| 2026-February-1 }}

<ol>
<li>{{hilite | When terminating a valley at a ''wall'' or ''curb'' is unavoidable, the design must incorporate a cricket covered with a ''waterproofing roof system'', to divert water off the roof|| 2026-February-1 }}.
<li>{{hilite | Dead valleys should be avoided|| 2023-June-16 }}{{hilite |, but {{hilite | when a cricket is not practicable and|| 2026-February-1 }} roof slope terminates in a dead valley, it must be designed as a ''waterproofing roof system'' {{strike| the design must conform to the Application requirements in || 2023-June-16 }} [[#10.3.5.7. Dead Valleys | Article in 10.3.5.7.]] || 2025-February-1 }}
<li>{{hilite | All ''waterproofing roof systems'' used on crickets or in dead valleys must be carried up the vertical face of ''wall'' and ''curbs'' at least 304.8 mm (12”) when measured vertically from the ''drainage plane'', and any ''wall'' finishes must be terminated at least 203.2 mm (8”) above the cricket or dead valley, when measured vertically from the ''drainage plane'' || 2026-February-1 }} (See [[#10.3.5.7. Dead Valleys | {{hilite | Article in 10.3.5.7.|| 2026-February-1 }}]] and [[#10.3.7.2. Intersections with Waterproofing Roof Systems | {{hilite | Article 10.3.7.2.|| 2026-February-1 }}]]).
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5.-A Crickets and Dead Valleys''' Forming Part of Sentence 10.1.5.5.(1) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5-B Crickets and Waterproofing to Improve Drainage''' Forming Part of Sentence 10.1.5.5.(2) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 10.1.5.5.-A.png | link=https://rpm.rcabc.org/images/0/0e/ASM_Figure_10.1.5.5.-A.png | 400 px]] || [[File:ASM Figure 10.1.5.5.-B.png | link=https://rpm.rcabc.org/images/5/51/ASM_Figure_10.1.5.5.-B.png | 400 px]]
|}

==={{hilite | 10.1.6. Expansion and Control Joints || 2024-October-20 }}===
====10.1.6.1. Reserved====

====10.1.6.2. Control Joints====

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (roof dividers), and
<li>to specify their location and design.
</li></ol>
<li>{{hilite | Unless otherwise approved by the '''''Guarantor''''', ''control joints'' must be specified to divide a new ''roof system'' (addition) from existing ''roof systems'' || 2023-June-16 }} (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Roof Systems===
====10.1.7.1. Intersections with Waterproofing Roof Systems====

<ol>
<li>Intersections with ''water-shedding roofs'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Intersections with Membrane Gutters====

<ol>
<li>Refer to [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membrane====

<ol>
<li>{{hilite | Where a self-adhered membrane is required for flashing, it shall conform to the requirements for eave and valley protection in || 2024-January-31 }}{{hilite | {{strike| See || 2023-January-25 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] {{strike| for sheet membrane requirements. || 2023-January-26 }}|| 2021-June-30 }}
<li>{{hilite | Where the ''roof assembly'' adjoins a ''wall'', the ''wall'' must be flashed to provide continuity with the wall ''control layers'', and with the ''roof system'' underlayment using materials accepted by the '''''Guarantor''''' and having the following properties: || 2024-January-31 }}
<ol>
<li>{{hilite | When the primary slope of the roof is less than 1:6 (2" in 12"), flashing must be a self-adhered membrane with a minimum thickness of 3 mm (118 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is 1:6 (2" in 12") or greater but less than 1:3 (4" in 12"), flashing must be an exterior-reinforced self-adhered membrane with a minimum thickness of 1 mm (39 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is greater than 1:3 (4" in 12"), flashing material may be self-adhered or nail-applied. || 2024-January-31 }}
</li></ol>
{{strike| <li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm. || 2023-January-26 }}
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into roof perimeters and walls must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, ''Linear Metal Flashing'']]
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''linear metal flashing'' shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====
<ol>
<li>All wall surfaces to which roofing materials must be installed (including Concrete Masonry Unit (CMU)) must be declared suitable by the ''manufacturer'', or they must be covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membrane flashing shall be prepared following the ''manufacturer's'' published requirements.
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>All changes in plane in the ''roof assembly'' must be waterproofed beneath metal flashing with a self-adhering eave protection sheet membrane acceptable to the '''''Guarantor'''''.
<li>''Projects'' must follow proper sequencing so that materials, ''systems'', or ''assemblies'', installed by the ''Contractor'' correctly interface with materials, ''systems'', or ''assemblies'' installed by other trades, to establish or preserve continuity and ensure positive waterproofing connections (overlapping, “shingle fashion”).
<li>When coordination with other trades requires some adaptation to the requirements in this Standard, any variance to proper detail sequencing must be approved in writing by the ''Design Authority''.
<li>{{hilite | All sheet membrane flashing must be installed to conform to the ''manufacturer's'' published instructions, and must|| 2021-October-30 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]],
<li>{{hilite | be ''fully bonded'' to an acceptable substrate,|| 2021-October-30 }}
<li>{{hilite | be installed without fish-mouths or wrinkles|| 2021-October-30 }},
<li>{{hilite | be hand-rolled with a ''manufacturer’s'' accepted roller and ''fully bonded'' to an acceptable, prepared substrate|| 2021-October-30 }},
<li>be reinforced at all inside and outside corners with membrane gussets, measuring at least 101.6 mm x 152.4 mm (4” x 6”), excluding the tapered ends,
<li>overlap any wall membranes or finishes by at least 50.8 mm (2”), and
<li>underlap any wall membranes or finishes by at least 76.2 mm (3").
</li></ol>
<li>{{hilite | The upper termination of sheet membrane flashing must be protected from damage, and from water intrusion, || 2023-June-16 }}
<ol>
<li>{{hilite | with linear metal flashing installed in keeping with || 2023-June-16 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]], or
<li>{{hilite | with a wall finish installed by others. || 2023-June-16 }}
</li></ol>
<li>When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination.
<li>When sheet membrane flashing is mechanically secured with a termination bar or a metal flashing, fasteners must be spaced no more than 304.8 mm (12”) O.C.
<li>When a second metal flashing is installed to protect a termination bar or flashing used to secure the sheet membrane flashing, it may be fastened no more than 609.6 mm (24”) O.C., provided the ''linear metal flashing'' maintains continuous contact with the substrate.
<li>When closer fastener spacing is required by the ''manufacturer'', the wall must be constructed or modified to facilitate solid fastener securement.
<li>''Linear metal flashings'' must be secured in keeping with the requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]]
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>Membrane flashing must be protected from damage with full-coverage ''linear metal flashing''.
</li></ol>

===10.3.3. Reserved===
===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings installed on slopes 1:6 (2" in 12") up to and less than 1:1 (12” in 12”)|| 2021-June-30}} must be hooked to metal Z-closures which are
<ol>
<li>set in two (2) rows of gunnable sealant or sealant tape, and
<li>fastened through the metal roof panel into the deck.
</li></ol>
<li>{{hilite | Cap and hip flashings installed on roofs with a slope greater than 1:1 (12” in 12”) (''Steep Slopes'') may be|| 2021-June-30}}
<ol>
<li>{{hilite | hooked to a metal Z-closure|| 2021-June-30}}, and
<li>{{hilite | mechanically fastened to the standing seam with an acceptable fastener|| 2021-June-30 }}.
</li></ol>
<li>For roof slopes
<ol>
<li>up to 2:3 (8” in 12”), metal cap/hip flashing must extend a minimum of 152.4 mm (6") over metal roof panels, measured from the back pan, and extending on each side of the ridge/hip.
<li>equal to or greater than 2:3 (8” in 12”), the metal cap/hip flashing may be reduced by 76.2 mm (3”) over metal roof panels, measured from the back pan and extending on each side of the ridge/hip.
<li>greater than 1:1 (12” in 12”), an underlying support at the centre of the ridge is required to support the ridge cap flashing.
</li></ol>
</li></ol>

====10.3.4.2. Eaves and Rake Edges====
(See Construction Detail [[ASM Eave and Rake Edges (Mechanical Seams) | "Eave and Rake Edges (Mechanical Seams)"]])

<ol>
<li>All linear metal flashing installed at the eave or rake edges must
<ol>
<li>be completely separated from a wood ''deck'' with eave protection sheet membrane (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]), and
<li>allow for metal panel expansion and contraction.
</li></ol>
<li>Eave protection sheet membrane installed to separate eave and rake edge metal flashing from a wood ''deck'' shall extend past the edges of a flashing by at least 6.35 mm (1/4").
<li>Eave metal flashing
<ol>
<li>must be fabricated to secure the eave edge of the panel in place,
<li>shall extend onto the sloped ''deck'' or supporting member at least 76.2 mm (3”),
<li>shall be secured
<ol>
<li>along the top flange with screws spaced in accordance with the engineered design but no further apart than 304.8 mm (12”) O.C.,
<li>on the fascia metal flashing, utilizing a continuous clip fastened a maximum of 304.8 mm (12") O.C., and
<li>shall be covered with eave protection sheet membrane.
</li></ol>
<li>When external metal gutters are installed (See [[#11.3.3.9. External Gutters | Article 11.3.3.9.]]), linear metal eave flashing with a face less than 50.8 mm (2”) do not require a clip but must be securely fastened with an alternative method acceptable to ''Design Authority''.
</li></ol>
<li>Rake edge metal flashing must be firmly secured
<ol>
<li>{{hilite | to a ''wall'' using a concealed continuous clip fastened a maximum of 304.8 mm (12”) O.C. (Ref. [[#Part 13 - Linear Metal Flashing | Part 13]] for clip requirements; exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite | to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Where external metal gutters will be installed, the eave metal flashing should be installed to accommodate the gutter and hangar.
<li>When gutter hangars are to be fastened behind the eave flashing, the eave flashing does not require a continuous clip and may be face-screwed together with the gutter hangar.
</li></ol>
</li></ol>

====10.3.4.3. Reserved====
====10.3.4.4. Reserved====
====10.3.4.5. Windows and Wall Openings====

<ol>
<li>Windows and other wall openings that intersect with the ''roof system'' shall be flashed with membrane and metal conforming to the requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.3.4.5.]]
</li></ol>

===10.3.5. Valleys===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.5.1. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membrane must be installed in keeping with the requirements in [[#8.3.2.2. Valley Protection | Article 8.3.2.2.]]|| 2021-June-30 }}
</li></ol>

====10.3.5.2. General Requirements for Valley Metal Flashing====

<ol>
<li>Drag load fastening is mandatory on all valleys.
<li>Metal valley panels must
<ol>
<li>be installed shingle fashion,
<li>overlap the adjacent lower panel at least 203.2 mm (8"), and
<li>be sealed at the lapped joint with two horizontal rows of approved sealant.
</li></ol>
<li>Valley dividers are required and must be at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider.
<li>Exposed valleys must be at least 254 mm (10") wide (no less than 127 mm (5") per side, measured from the divider to the metal roof panel); wider valleys are recommended in high snow load areas (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]] and [[#10.1.5.3. Valleys for Heavy Snow Loads | Article 10.1.5.3.]]).
<li>{{hilite | Metal valley sections (hooked or unhooked) || 2023-June-16 }}
<ol>
<li>must overlap the section immediately down-slope at least 203.2 mm (8"),
<li>shall be embedded in at least two rows of an acceptable sealant or butyl tape where they overlap,
<li>shall be secured in keeping with the specified design, and
<li>shall be flashed ("stripped in") and sealed to the ''valley protection'' membrane with eave protection sheet membrane conforming to [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<ol>
<li>measuring at least a 304.8 mm (12”) in width, and
<li>applied to extend past the flashing fasteners by at least 38.1 mm (1-1/2”).
</li></ol>
</li></ol>
<li>Reverse laps must be sealed with a membrane-compatible sealant.
</li></ol>

====10.3.5.3. Hooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.1_Hooked_Valley_Flashing ASM 10.3.1 Hooked Valley Flashing])

<ol>
<li>Hooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.3. Hooked Metal Valleys | Article 10.3.5.3.]],
<ol>
<li>be fabricated with a built-in hook strip returned 38.1 mm (1-1/2") to
<ol>
<li>form a water cut-off, and
<li>hook onto the valley metal panel, and
</li></ol>
<li>incorporate a flange measuring at least 76.2 mm (3”) wide, to secure the metal valley flashing to its substrate.
</li></ol>
</li></ol>

====10.3.5.4. Unhooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.2_Unhooked_Valley_Flashing ASM 10.3.2 Unhooked Valley Flashing])

<ol>
<li>Unhooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.4. Unhooked Metal Valleys | Article 10.3.5.4.]],
<ol>
<li>be hemmed with a return measuring at least 38.1 mm (1-1/2") to form a water cut-off, and
<li>secured with continuous cleats
<ol>
<li>be fabricated from 26-gauge flat metal stock (min. thickness), and
<li>be fabricated with a leg measuring at least 76.2 mm (3”) wide.
</li></ol>
</li></ol>
</li></ol>

====10.3.5.5. Reserved====
====10.3.5.6. Reserved====
====10.3.5.7. Dead Valleys====

<ol>
<li>Dead valleys must be
<ol>
<li>waterproofed to conform to the requirements for membrane gutters (See [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]), and
<li>sloped at least 1:50 (2%, or 1/4” in 12”), to positively drain
<ol>
<li>into one or more roof drains{{hilite |, or || 2021-February-7 }}
<li>onto a lower ''water-shedding'' roof.
</li></ol>
</li></ol>
<li>{{hilite | Transitions from a dead valley to the metal panel system must conform to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]], and where a wall is present, a diverter shall be incorporated to protect the ''wall system''.|| 2021-February-7 }}.
</li></ol>

===10.3.6. Reserved===

===10.3.7. Intersections with Other Roof Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where two ''roof systems'' intersect, materials must be compatible with each other, or must be separated from contact by an intermediate separation layer.
</li></ol>

====10.3.7.2. Intersections with Waterproofing Roof Systems====

<ol>
<li>When a ''waterproofing roof system'' transitions down a slope onto a lower ''water-shedding roof system'', the ''waterproofing roof system'' membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the maximum water level,
<li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'', or
<li>304.8 mm (12”) plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'' or maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing roof system'' sheet membrane flashing on the slope must be mechanically secured, separately from the water-shedding ''roof system'',
<li>''underlayment'' must overlap the ''waterproofing roof system'' sheet membrane flashing by no less than 101.6 mm (4”),
<li>{{hilite |metal panels must overlap the ''waterproofing roof system'' sheet membrane flashing by at least 152.4 mm (6”) (A metal counter-flashing with an exposure of at least 101.6 mm (4”) is required at the bottom termination of the metal panels|| 2021-June-30}}), and
<li>fasteners for the ''water-shedding roof system'' must be at least 203.2 mm (8”) above the ''finished system surface'' of the ''waterproofing roof system'' (when measured vertically), or 304.8 mm (12”) for regions with heavy snow.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Intersections with Membrane Gutters====

<ol>
<li>Refer to the requirements in [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</li></ol>

===10.3.8. Reserved===

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=

==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary roof drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''roof assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a drain leader and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and
<li>{{hilite |which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.|| 2020-July-3 }}
</li></ol>
<li>''Primary roof drain'' means the primary means of draining water from the roof.
<li>''Roof drain'' means “A fitting or device that is installed in the roof to permit storm water to discharge into a ''leader''.” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("Scupper") means an open or closed roof drain that conveys water laterally from one roof area to another, or from the roof directly to the exterior of the building.
<li>''Secondary roof drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary roof drain''. An ''overflow drain'' is a type of ''secondary roof drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 15-year Guarantee''''' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
<li>The ''Design Authority'' is responsible for the design of roof drainage.
<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} {{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }} {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
<li>{{hilite |The size (flow rate) of roof drains and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }} {{hilite | (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location)|| 2027-February-1 }}.
<li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li>drain type, size, flow rate, and
<li>size and placement of the ''overflow drain''.
</ol></li>
<li>{{hilite |The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation) || 2021-October-23 }}
<ol>
<li>roof slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>{{hilite | the location of the ''drainage plane''|| 2021-October-30 }} {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished system surface'', {{hilite | and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design|| 2021-October-30 }}).
</li></ol>
<li>Roofs may drain off a roof edge, or by means of internal plumbing (both are permissible under the '''''RoofStar Guarantee Program''''').
<li>When a roof is designed to drain off an edge, water may drain freely, it may be diverted to a lower roof area, or it may be collected and diverted into a drainage system (plumbing) by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]).
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.
<li>When a roof is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow restrictor is present in an existing cast drain leader, the restrictor should be reinstalled.
</li></ol>

====11.1.3.2. Roof Drain Function and Location====

<ol>
<li>Roof drains must be used only for draining water.
<li>''Roof drains'' on new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>When existing ''roof drain'' and penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3.,"All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast-iron Roof Drains====

<ol>
<li>Only cast-iron roof drains, and existing external couplers used to connect drains to leaders, may be re-used for roof replacement ''projects''.
<li>Drain extensions for cast-iron roof drains should be avoided, since the connection with the cast drain is not sealed; the result is a leak into the roof system.
</li></ol>

====11.1.4.2. Scuppers and Overflows====
(See [[Notes to ASM Standard#A-11.1.4.2. | Note A-11.1.4.2.]])

<ol>
<li>A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}..
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the roof, in the event of ''primary roof drain'' failure.
<li>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be
<ol>
<li>located no higher than 101.6 mm (4”) above {{hilite | the ''drainage plane''|| 2021-October-30 }},
<li>situated so that they freely and visibly discharge storm water, and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====11.1.4.3. Membrane Gutters====
(See [[Notes to ASM Standard#A-11.1.4.3. | Note A-11.1.4.3.]])

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' {{hilite | (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) || 2023-June-16 }} only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>{{hilite | The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to|| 2020-July-3 }}
<ol>
<li>{{hilite | rainfall and snow load calculations for the building location|| 2020-July-3 }},
<li>{{hilite | drain type, size, and flow rate|| 2020-July-3 }}, and
<li>{{hilite | size and placement of the ''overflow drain''|| 2020-July-3 }}.
</li></ol>
<li>New membrane ''gutters'' shall be designed with a minimum width of 304.8 mm (12”) and a depth not exceeding the ''gutter’s'' width.
<li>At least 101.6 mm (4") clearance on the horizontal plane is required between any membrane ''gutter'' wall and the
<ol>
<li>the edge of the drain bowl for spun drains, and
<li>the edge of the drain leader for flat spun or welded drains.
</ol></li>
<li>Only fully-adhered membranes may be used in membrane ''gutters''.
<li>Metal ''gutter'' liners are permissible, provided they are designed to fit over acceptable waterproofing, and the liners conform to the material requirements in [[#11.2.1.3. Membrane Gutters and Gutter Liners | Article 11.2.1.3.]]
<li>''Conventionally insulated systems'' that drain into a membrane ''gutter'' must abut solid blocking at the ''gutter'' edge, which provides
<ol>
<li>a stop for the insulation ''assembly'', and
<li>a solid substrate for the securement of flashings and membranes.
</ol></li>
<li>An ''overflow drain'' must be located at least
<ol>
<li>101.6 mm (4”) above the primary membrane ''gutter'' drain, and
<li>25.4 mm (1”) below any mechanical fasteners used to secure the adjoining ''roof system''.
</ol></li>
<li>In roof replacement applications, existing membrane ''gutters'' may qualify for a '''''RoofStar Guarantee''''', but should be redesigned if their capacity is undersized, and must incorporate an overflow drain in keeping with the requirements in this Part.
<li>Where the primary drain in an existing membrane ''gutter'' is undersized for its capacity, the primary drain must be replaced with one that is properly sized.
<li>When a membrane ''gutter'' adjoins a RoofStar-guaranteed ''water-shedding system'', the transition from gutter to ''roof system'' shall conform to [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</ol></li>

====11.1.4.4. External Gutters====

<ol>
<li>{{hilite | External gutters and downspouts are not covered by the '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | Notwithstanding other requirements in this Part, when a roof drains onto another roof, the drainage of water must be controlled to eliminate or mitigate damage from water flow || 2021-June-22 }}; {{hilite | the use of splash pads, when appropriate for the location, is strongly recommended|| 2021-June-30 }}.
<li>{{hilite |Downspouts, installed by the ''Contractor'' or other trades and laid directly against the slope of the roof to connect an upper roof drainage to lower gutters, is acceptable under the '''''RoofStar Guarantee Program''''', provided the material is strongly secured both at the top and the bottom, and the issue of dissimilar metal corrosion can be eliminated|| 2021-June-30 }}.
</li></ol>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>{{hilite | Except for cast-iron roof drains, which are usually supplied and installed by others, only new drains and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>{{hilite | All roof drains and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''|| 2026-July-1 }}.
<li>Reuse of any penetration flashing or drain (except serviceable cast iron drains) is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]])|| 2021-February-5 }}.
<li>{{hilite | Where drains or overflows are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}.
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to ASM Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All roof drains
<ol>
<li>must be designed and manufactured for roof applications only, and shall not be floor drains, and
<li>shall be made so that the roof membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast-iron ''primary roof drains''
<ol>
<li>must be supplied with a sump receiver and under-deck clamp,
<li>should separate securement of the under-deck clamp and clamping ring from securement for the strainer, and
<li>{{hilite | must be installed by the trade supplying the roof drain. || 2023-June-16 }}
</li></ol>
<li>{{hilite | Cast-iron ''scupper drains'' must be || 2023-June-16 }}
<ol>
<li>{{hilite | supplied with a clamping strainer, || 2023-June-16 }} and
<li>{{hilite | designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable). || 2023-June-16 }}
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li> must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li> must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>should incorporate a clamping ring (a clamping ring is recommended for ''primary flanged insert drains'' specified on any ''project''), but clamping rings are required when ''primary flanged insert drains'' are specified for a '''''RoofStar 15-year Guarantee'''''.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that connect with plumbing inside the building|| 2026-July-1 }} (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that drain directly to the exterior of the building|| 2026-July-1 }} (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the drain to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the scupper,
<ol>
<li>equal in capacity to the main drain leader opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>{{hilite | must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but || 2026-July-1 }}
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>{{hilite | may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and|| 2026-July-1 }}
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.{{strike|, and || 2025-May-29 }}
</li></ol>
</li></ol>

====11.2.1.3. Membrane Gutters and Gutter Liners====

<ol>
<li>Membrane gutter membranes shall be
<ol>
<li>accepted by the '''''Guarantor''''',
<li>acceptable to the ''manufacturer'',
<li>compatible with the adjoining ''roof system'', and
<li>manufactured for full adhesion (semi-adhesion and mechanical securement are not permissible).
</ol></li>
<li>A reinforced liquid membrane systems (PMMA or PUMA) approved for field use and applied to an accepted SBS-modified base membrane is acceptable as a ''gutter'' membrane.
<li>A metal ''gutter'' liner
<ol>
<li>may be fabricated from
<ol>
<li>copper sheet material, incorporating soldered seams, or
<li>stainless steel, incorporating welded seams, and
</ol></li>
<li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</ol></li>
</ol></li>

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure the roof membrane and penetration flashings, or related accessories, must be
<ol>
<li>properly sized in accordance with ''roof system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>{{hilite | Only a RoofStar-accepted|| 2021-February-7 }} reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} liquid membrane flashing system may be used on the water plane to flash roof drains, scuppers, and overflows.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Roof Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Roof Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>Roof drains for new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The 304.8 mm (12”) spacing requirement for roof drains does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>Roof drains and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the drain.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All roof drains must be supplied and installed with a secured strainer to prevent debris from blocking the drain.
</ol></li>

====11.3.2.4. Membrane Flashing====

<ol>
<li>Drains must be flashed using the membrane specified and installed to waterproof a gutter, and shall be acceptable to the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} may be used on the ''drainage plane'' to flash roof drains, ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains and Membrane Gutters===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====
====11.3.3.2. General Requirements for Cast-iron Roof Drains====

<ol>
<li>Cast-iron roof drains must be installed by the plumbing/mechanical trade.
<li>When cast-iron roof drains are used, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain.
<li>Drain extensions for cast-iron roof drains should be avoided.
<li>Existing flow restrictors removed during roof construction should be reinstalled.
<li>All cast-iron roof drains must be
<ol>
<li>new or clean,
<li>unbroken (this applies to the clamping ring also), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The continuity of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast-iron Drains Installed with Lead Flashing====

<ol>
<li>Cast-iron roof drains installed with lead flashing shall conform to the requirements of Article 11.3.3.3. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.4. Cast-iron Drains Installed with Membrane Flashing====

<ol>
<li>Cast-iron roof drains installed with sheet membrane flashing shall conform to the requirements of Article 11.3.3.4. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Cast-iron roof drains retrofitting shall conform to the requirements of Article 11.3.3.5. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flange-type roof drain installation shall conform to the requirements of Article 11.3.3.6. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>''Scupper'' and ''overflow'' installation shall conform to the requirements of Article 11.3.3.7. in the Standard for the membrane used to waterproof their installation.
</li></ol>

====11.3.3.8. Membrane Gutters====

<ol>
<li>All ''gutter'' membrane construction shall conform to the requirements of Article 11.3.3.8. in the Standard for the membrane used in related waterproofing applications.
</ol></li>

====11.3.3.9. External Gutters====

<ol>
<li>When external gutters are attached to an Architectural Sheet Metal Roof System, they shall not interfere with the free movement of water or air away from the ''roof system''.
</ol></li>

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |be designed to utilize the split panel detail; flexible boot flashings secured with gasketed screws are not permitted|| 2022-February-5 }}, and
<li>{{hilite |specify two storm collars separated by no more than 76.2 mm (3”), for all penetration flashings that do not incorporate a settlement cap|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>{{hilite | Where a roof design includes openings through the ''roof assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall || 2024-June-15 }}
<ol>
<li>{{hilite | provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and || 2024-June-15 }}
<li>{{hilite | require a ''curb'' or an acceptable penetration flashing to enclose and seal each roof opening. || 2024-June-15 }} {{strike| must be enclosed and sealed with a ''curb'', or a penetration flashing || 2023-June-15 }}
</li></ol>
<li>{{hilite | Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others. || 2023-June-16 }}
<li>{{hilite | Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head|| 2020-July-3 }}.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration, and
<li>properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form a seal || 2023-January-25 }} {{hilite | around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2") || 2024-January-31 }}, or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration; the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>{{hilite | Cylindrical ("pipe-type") penetrations must be sealed with|| 2020-July-3 }}
<ol>
<li>{{hilite | the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,|| 2020-July-3 }}
<li>{{hilite | a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. "SBS" Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | 2-Part Retrofit Flashing (Cable Penetration)]])|| 2020-July-3 }}, or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Flexible boot flashings for pipe-type penetrations
<ol>
<li>may be used for penetrations up to 152.4 mm (6”) in diameter,
<li>should be located near the upper end of a slope for long panels,
<li>must not be located on the ''drainage plane'' when the roof slope is less than 1:6 (2” in 12”),
<li>must be located at or near the centre of metal roof panels, measured between the upstands, to avoid interference with standing seams or panel ribs, or in the alternative (when interference is unavoidable) on a raised panel above seam height,
<li>must be fastened with high-domed gasketed cladding screws placed no more than 38.1 mm (1-1/2") O.C., and
<li>must be set in a bed of sealant.
</li></ol>
</li></ol>

====12.1.3.2. Reserved====

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }}
<li>When a roof is replaced and existing penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, as specified in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</li></ol>

====12.1.3.4. Curbs and Sleepers====

<ol>
<li>The design and placement of curbs and sleepers shall be the responsibility of the ''Design Authority'', but shall in any event conform to the application requirements in [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]
<li>''Curbs''
<ol>
<li>must be designed for securement directly to the ''deck'' structure, or to intermediate blocking (they must not be situated on top of the ''roof system''), and
<li>shall be designed to achieve a minimum height of 203.2 mm (8”), measured from the surface of the ''drainage plane'' (not including panel seam upstands), or from the highest point of a ''curb cricket''.
</li></ol>
<li>''Curbs'' with a width
<ol>
<li>less than 914.4 mm (36”) may be designed with a ''cricket'' but require, as a minimum, a back-pan flashing,
<li>between 914.4 mm (36”) and 2438.4 mm (96") require an architectural metal ''cricket'' with rigid support, to prevent metal distortion, and
<li>greater than 2438.4 mm (96") must
<ol>
<li>be designed to divert and drain the anticipated volume of water above the ''curb'',
<li>incorporate a ''cricket'', fully supported with insulation or framing and designed to direct water and snow to either side of the ''curb'', and
<li>incorporate a waterproofed gutter membrane installed over the ''cricket'' (Also see [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3., ''Membrane Gutters'']]).
</li></ol>
</li></ol>
<li>A waterproofed gutter membrane around a ''curb''
<ol>
<li>shall have a minimum slope of 2%, along the up-slope face of the ''curb'', to direct water around the ''curb'' and toward the eaves,
<li>should be continuous along the sides of the ''curb'', as dictated by the ''curb'' size and roof slope, or fall, and
<li>must direct water onto the lower metal panels.
</li></ol>
<li>Equipment isolators are not considered part of the ''roof system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''Guarantee'''''.
</li></ol>

====12.1.3.5. Attic Ventilation====

<ol>
<li>{{hilite | See || 2027-February-1 }} [[#1.1.3.4. Ventilation |{{hilite | Article 1.1.3.4. "Ventilation" || 2027-February-1 }}]].
</li></ol>

{{strike| <ol>
<li>{{hilite | The design and selection of the ventilation system is the responsibility of the ''Design Authority'', and may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents,|| 2021-June-30 }}
<li>{{hilite | gable end vents,|| 2021-June-30 }}
<li>{{hilite | hip vents,|| 2021-June-30 }}
<li>{{hilite | static vents,|| 2021-June-30 }}
<li>{{hilite | ridge vents, and|| 2021-June-30 }}
<li>{{hilite | cupolas.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation|| 2021-June-30 }}
<ol>
<li>{{hilite | must meet the minimum requirements of the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]) (Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee''''')|| 2021-June-30 }}, and
<li>{{hilite | shall be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite |the slope of the roof|| 2021-June-30 }},
<li>{{hilite |the vented area|| 2021-June-30 }}, and
<li>{{hilite |the design and configuration of the roof structure|| 2021-June-30 }}, and
</li></ol>
<li>{{hilite | shall be provided for roofs over cathedral ceilings.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | are acceptable and are recommended for all areas with vaulted ceilings|| 2021-June-30}}.
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
</li></ol> || 2026-January-27 }}

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed to metal panels and should be designed for attachment to vertical surfaces only.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>{{hilite | See [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] for sheet membrane requirements.|| 2021-June-30 }}
<li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm.
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>{{hilite | manufactured from sheet metal conforming to the material requirements in || 2023-June-16 }} [[#Section 13.2. Materials | Section 13.2.]], {{hilite | when the flashing is custom-made or fabricated by the ''Contractor'', || 2023-June-16 }}
<li>{{hilite | compatible with the ''roof system'', || 2023-June-16 }}
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>{{hilite | of sufficient height to extend vertically (when measured from the up-slope base of the flashing upstand to the opening at the top) at least || 2022-October-22 }}
<ol>
<li>{{hilite | 203.2 mm (8”), for slopes 0 to 1:6 (2” in 12”) || 2022-October-22 }},
<li>{{hilite | 152.4 mm (6”), for slopes greater than 1:6 and equal to 1:3 (4” in 12”) || 2022-October-22 }}, or
<li>{{hilite | 101.6 mm (4”), for slopes greater than 1:3 || 2022-October-22 }}.
</li></ol>
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
<li>{{hilite | plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer. || 2023-June-16}}
</li></ol>
<li>{{hilite | In regions that experience high snow accumulations, penetration flashings taller than the stated minimums in this Article are strongly recommended || 2022-October-22 }}.
<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} {{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }} {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>{{hilite | must slope downward from the penetration approximately 45°,|| 2021-June-30 }}
<li>{{hilite | shall be at least 50.8 mm (2”) wide|| 2021-June-30 }},
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
<ol>
<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
</li></ol>
<li>{{hilite | Chimney chase caps must be || 2021-June-30 }}
<ol>
<li>{{hilite | galvanized metal conforming to the requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]|| 2021-June-30 }},
<li>{{hilite | fabricated with penetration collars at least 152.4 mm (6") in height|| 2021-October-30 }},
<li>{{hilite | soldered at all joints in the ''drainage plane''|| 2021-June-30 }}, and
<li>{{hilite | fabricated with slope to shed water|| 2021-June-30 }}.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing Systems Penetrations====

<ol>
<li>{{hilite | Lead plumbing vent flashings must each be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated with sheet lead material weighing no less than 14.65 Kg/m2 (3lb/sf)|| 2021-June-30 }},
<li>{{hilite | properly sized for the pipe|| 2021-June-30 }}, and
<li>{{hilite | supplied with a settlement cap made from the same materials (the inside collar of the settlement cap must fit vertically inside the pipe opening by at least 25.4 mm (1”))|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be|| 2021-June-30 }}
<ol>
<li>properly sized for the penetration, both in diameter and height,
<li>flexible or sloped to suit the roof slope, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Air Vents====
{{hilite | (See [[#Article 1.1.3.4. Ventilation | Article 1.1.3.4., "Ventilation"]]) || 2027-February-1 }}

<ol>
<li>{{hilite | Vents, regardless of their type, must be either|| 2021-June-30 }}
<ol>
<li>{{hilite | proprietary to, or privately labeled for, the panel manufacturer, or|| 2021-June-30 }}
<li>{{hilite | specifically accepted by the '''''RoofStar Guarantee Program''''' (See [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ridge vents must be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated from a compatible metal|| 2021-June-30 }},
<li>{{hilite | acceptable to the metal panel manufacturer|| 2021-June-30 }},
<li>{{hilite | suitable for slopes 1:4 and greater|| 2021-June-30 }}, and
<li>{{hilite | constructed with internal baffles to prohibit the intrusion of|| 2021-June-30 }}
<ol>
<li>{{hilite | insects|| 2021-June-30 }},
<li>{{hilite | vermin|| 2021-June-30 }},
<li>{{hilite | snow|| 2021-June-30 }}, and
<li>{{hilite | debris|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Natural air flow vents must be
<ol>
<li>Type B or C ventilators conforming to CAN3-A93-M82 (R2003), "Natural Airflow Ventilator for Buildings", and permanently marked with the standard number,
<li>tested by an accredited third party to verify compliance with the required Standard,
<li>fabricated from plastic or corrosion-resistant metal (painted or unfinished), and
<li>manufactured with a base flange that measures
<ol>
<li>at least 76.2 mm (3”) wide on the up-slope side of the flashing, or
<li>at least 50.8 mm (2”) along the vertical sides, and along the bottom side of the flashing.
</li></ol>
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |incorporate only the split panel detail for flashing penetrations (use of a flexible boot flashing secured with gasketed screws is not permitted)|| 2022-February-5 }}, and
<li>{{hilite |incorporate no fewer than two storm collars for each penetration flashing that does not include a settlement cap; each collar must be separated from the other by no more than 76.2 mm (3”)|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}====

<ol>
<li>All penetration flashing materials must be new.
<li>All penetrations must be flashed to seal the penetration where it passes through the deck and underlayment and must prevent water ingress at least 203.2 mm (8") above the ''finished system surface''.
<li>{{hilite | Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing|| 2021-June-30 }}
<ol>
<li>{{hilite | must be suitable for the slope and penetration|| 2021-June-30 }}, and
<li>{{hilite | must be properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form or permit a seal || 2023-January-26 }} around the penetration {{hilite | to permit a seal|| 2024-January-31 }}|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All penetration flashings suitable for application on an architectural metal panel ''roof system'' || 2026-February-1 }}
<ol>
<li>{{hilite | must be secured to the metal panel system with mechanical fasteners|| 2026-February-1 }},
<li>{{hilite | shall maintain a drainage space around all sides of at least 12.7 mm (1/2”) and shall not impede the flow of water along a panel|| 2026-February-1 }},
<li>{{hilite | shall be oriented to promote positive drainage, and|| 2026-February-1 }}
<li>{{hilite | shall be sealed to the panel or to split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for split pan requirements) with an acceptable sealant applied to both the underside of a flange and around its edges|| 2026-February-1 }}.
</li></ol>
<li>A flexible boot flashing {{hilite | may be|| 2026-February-1 }} used with cylindrical penetration {{strike| is permissible || 2025-February-1 }}, provided
<ol>
<li>the flexible boot flashing
<ol>
<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
<li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
<li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,
<li>is fastened with gasketed screws spaced no more than 38.1 mm (1-1/2") O.C.,
<li>is secured around the penetration with a stainless-steel clamping ring{{hilite |, but when a clamping ring cannot be installed, the top of the flashing must be protected with a caulked, galvanized storm collar|| 2021-October-30 }}, and
<li>is sealed around the penetration joint with a bead of sealant
</li></ol>
<li>{{hilite | the penetration is fitted with a properly sized and caulked galvanized storm collar|| 2021-June-30 }}, and
<li>{{hilite | the plumbing trade (for new construction only) ensures|| 2021-June-30 }}
<ol>
<li>{{hilite | the flashing is not distorted|| 2021-June-30 }}, and
<li>{{hilite | a storm collar is securely fitted and caulked with sealant|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>{{hilite | Plastic flashings, vents, and related fittings shall not be used on an architectural sheet metal roof|| 2026-February-1 }}.
<li>A cylindrical penetration flashing (i.e., for a pipe)
<ol>
<li>with a maximum opening diameter equal to or less than 152.4 mm (6”) may be installed on a curb, but shall in any case be flashed with a flexible boot flashing, or with a rigid metal pipe flashing.
<li>with a maximum opening diameter greater than 152.4 mm (6”), and all exhaust flues (B-vents), may not be flashed at the ''drainage plane'' and instead must be installed on a curb (see [http://rpm.rcabc.org/index.php?title=ASM_11.2.1_Curb,_Split_Panel ASM 11.2.1 Curb, Split Panel]).
</li></ol>
<li>{{hilite | When a cylindrical penetration extends above the top edge of its flashing so that it cannot be sealed with a settlement cap, the penetration must be fitted with at least one properly fitted, level, galvanized clamping storm collar placed immediately above the top opening of the flashing.|| 2021-June-30 }}
<li>{{hilite | All installed storm collars must be sealed with a continuous, untooled bead of acceptable sealant at least 9.53 mm (3/8”) wide, applied to and centered over the joint between the collar and the penetration|| 2020-July-3 }}.
<li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head), or
<li>a curb waterproofed with sheet membrane and flashed with sheet metal, and fitted with a customized sheet metal hood (shaped to function like a weather head).
</li></ol>
<li>Cables passing through a penetration flashing should be drooped, and horizontal pipes should be fitted with a capillary-breaking collar, to prevent water from tracking along the cable or pipe, into the building; {{hilite | water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | Where a purpose-made flashing does not fit the penetration (i.e., a penetration that is a square post), or when a penetration extends above the top edge of the flashing so that it cannot be enclosed with a cap or protected with a storm collar {{hilite | {{strike| (Ref. Figure 12.3.2.-A)|| 2025-February-1 }}{{hilite | (See '''Figure 12.3.2.1.-A''')|| 2026-February-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}|| 2020-July-3 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of {{hilite |semi-cured EPDM (or its equivalent)|| 2020-July-3 }},
<ol>
<li>{{hilite | loosely wrapped around the penetration and the flashing at least 1-1/2 times, or adhered to itself and overlapped at least 50.8 mm (2") ||2021-February-7 }},
<li>{{hilite | installed free of wrinkles or fish-mouths ||2021-February-7 }},
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>{{hilite | clamped at the top and at the bottom using stainless steel clamps set back from the membrane edge no more than 6.35 mm (1/4") ||2021-February-7 }}, or
</ol></li>
<li>with {{hilite | heat- ||2021-February-7 }}shrink tubing that
<ol>
<li>{{hilite | {{hilite | extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2") ||2021-February-7 }},
<li>is secured with stainless steel mechanical clamps installed at each end of the tubing, and
<li>{{hilite | is caulked with an acceptable sealant (when adhesive-lined heat-shrink tubing is used, the sealant may be omitted). || 2023-October-28 }}
</ol></li>
</ol></li>
<li>{{hilite | Unshielded flexible mechanical ("MJ") couplings || 2024-January-31 }}
<ol>
<li>{{hilite | shall be clamped to the penetration and its flashing, and sealed along the top edge with an acceptable sealant, and || 2024-January-31 }}
<li>{{hilite | are suitable for use only with penetrations that will not expand, contract, or move with anticipated building settlement, i.e., fall protection anchors. || 2024-January-31 }}
</ol></li>
<li>{{hilite | Chimney chase caps that are included in the scope of roofing work|| 2021-October-30 }}
<ol>
<li>{{hilite | shall be fabricated to meet the requirements set out in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]|| 2021-October-30 }},
<li>{{hilite | must be fully supported beneath the flashing|| 2021-October-30 }},
<li>{{hilite | must be waterproofed beneath the cap flashing with a RoofStar-accepted self-adhered eave protection membrane installed according to the membrane manufacturer’s written instructions (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]])|| 2021-October-30 }}, and
<li>{{hilite | shall be sealed at the penetration collars with the waterproofing membrane|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Cylindrical penetrations through chimney chase caps that form part of the roofing work must be fitted with a properly sized galvanized storm collar, caulked with sealant|| 2021-October-30 }}.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.1.-A Alternate Flashing of Pipe Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.1.(14) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.1.3.1-A (B).png | link=https://rpm.rcabc.org/images/4/49/Figure_12.1.3.1-A_%28B%29.png | 400 px]]
|}

====12.3.2.2. Reserved====
====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16}}
<li>{{hilite | Penetrations that are closer together than the allowable minimum distance must be supported by a written Variance issued by the '''''Guarantor'''''. || 2023-June-16 }}
</li></ol>

====12.3.2.4. Curbs and Sleepers====

<ol>
<li>All ''curb'' flashing shall be constructed on a split pan and affixed to the pan with blind rivets.
<li>Split pans must be
<ol>
<li>secured to the roof structure, and to adjacent panels, with cleats that are fashioned from compatible metal and fastened to the structure with screws.
<li>hooked to the cleats, and to adjacent roof panels, shingle fashion with positive laps, and
<li>sealed at each lap with two parallel untooled beads of sealant.
</li></ol>
<li>{{hilite | All curbs or penetrations that can be flashed with sheet membrane shall, regardless of their geometry, be flashed with a high-temperature rated membrane which must positively lap field underlayment, and must be carried|| 2026-February-1 }}
<ol>
<li>{{hilite | at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies)|| 2026-February-1 }},
<li>{{hilite | no higher than the top of a flexible boot penetration|| 2026-February-1 }},
<li>{{hilite | to the top inside edge of curbs, and|| 2026-February-1 }}
<li>{{hilite | onto field by at least 152.4 mm (6”)|| 2026-February-1 }}.
</li></ol>
{{strike| <li>All ''curbs'' must be fully flashed with the same membrane used for eave protection and valleys, and must extend to the top of the ''curb''. || 2025-February-1 }}
<li>Where possible, membrane flashing should extend across the top of the ''curb'' and terminate on the vertical inside face.
<li>{{hilite | Skylights installed on ''curbs'' meeting the minimum height requirements (see [[#12.1.3.4. Curbs and Sleepers | Article 12.1.3.4.]]) must be waterproofed with membrane and flashed with sheet metal in keeping with the requirements for ''curbs''|| 2021-June-30 }}.
<li>{{hilite | Skylights with proprietary ''curbs'', regardless of their height, must be sealed to the ''roof deck'' following the requirements for penetration and vent flashings|| 2021-June-30 }}.
<li>Back pan membrane flashing must extend
<ol>
<li>at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies),
<li>to the top inside edge of ''curbs'',
<li>914.4 mm (36") up the slope from the ''curb'' transition, and
<li>onto the field, past the ''curb'' at least 152.4 mm (6”).
</li></ol>
<li>Back-pan metal flashings for curbs up to 914.4 mm (36”) in width must extend
<ol>
<li>past the edges of a ''curb'' by 101.6 mm (4”) but project no closer to the adjacent seam than 51 mm (2”), and
<li>up the slope beneath the metal panels, to a point at least 150 mm (6”) (when measured vertically) from the base of the ''curb''.
</li></ol>
<li>''Curbs'' with widths 914.4 mm (36”) to 2438.4 mm (96") must be constructed with a metal ''cricket''
<ol>
<li>that is supported by rigid material to prevent metal distortion,
<li>that is integrated with the ''curb'' flashing panels,
<li>that extends up-slope from the back of the ''curb'', beneath the metal panels to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>fabricated with flanges that lap under the metal ''curb'' flashing at least 50.8 mm (2”), and
<li>that is closed at all seams, using
<ol>
<li>welds, or
<li>blind rivets, incorporating two beads/rows of sealant.
</li></ol>
</li></ol>
<li>Waterproofed gutter membranes for ''curbs'' wider than 2438.4 mm (96") must slope toward the eaves at least 2%, and shall
<ol>
<li>extend up the slope at the back of the ''curb'', beneath the metal panels, to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>extend horizontally from the ''curb'' at least 254 mm (10”), to the nearest metal panel upstand,
<li>lap continuously on either side of the ''curb'', and onto the down-slope metal panels, and
<li>extend a minimum of 152.4 mm (6") over the lower metal roof panels, measured from the back pan.
</li></ol>
<li>Fasteners for metal panels installed above the back of the ''curb'' must be placed 101.6 mm (4") or more above the curb base, when measured vertically.
</li></ol>

====12.3.2.5. Air Vents====

<ol>
<li>Air vents
<ol>
<li>{{hilite | shall be installed on a curb, using the split pan method (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements) || 2027-February-1 }},
<li>{{hilite | shall be installed within 609.6 mm (24”) of a ridge, and evenly spaced along the ridgeline, and || 2027-February-1 }}
<li>{{hilite | must be installed on only one side of a ridge or hip line (vents installed on opposite or adjacent sides of a roof plane will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
</li></ol>

{{strike| <ol>
<li>{{hilite |Air vents shall be installed in keeping with the requirements in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]]|| 2021-June-30 }}
</li></ol> || 2026-January-27 }}

====12.3.2.6. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]], and
<ol>
<li>may be used
<ol>
<li>{{hilite | on the ''drainage plane''|| 2021-February-7 }},
<li>where sheet membrane flashing may not be practical or even possible,
<li>{{hilite | to terminate the top edge|| 2021-February-7 }} of sheet membrane flashing,
<li>{{hilite | for sheet membrane reinforcement (i.e., at corners)|| 2021-February-7 }},
<li>{{hilite | where abrasion resistance is desirable|| 2021-February-7 }},
<li>{{hilite | where resistance to contamination of sheet membrane is necessary|| 2021-February-7 }}, or
<li>{{hilite | where the ''Design Authority'' specifies its application. || 2023-June-16 }}
</ol></li>
<li>must be compatible with the primary sheet membrane flashing,
<li>shall be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, all as required by the ''manufacturer'' in their published instructions,
<li>must be applied within masked boundaries to produce clean, straight, plumb edges, and
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece {{hilite | is cut to|| 2021-February-7 }} cover the masked area, to within 3.78 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") (See {{hilite | '''Figure 12.3.2.6.-A''' || 2026-February-1 }}).
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane.
<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing ''system''|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>{{hilite | may be used|| 2021-February-7 }}
<ol>
<li>{{hilite | to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]]|| 2021-February-7 }},
<li>{{hilite | to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes|| 2021-February-7 }}, or
<li>{{hilite | to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]])|| 2021-February-7 }}.
</ol></li>
<li>{{hilite | must not be used in the ''drainage plane'', or to reinforce membranes against abrasion|| 2021-February-7 }},
<li>{{hilite | must be applied in two cured coats, unless otherwise permitted in this Standard|| 2021-February-7 }}, and
<li>{{hilite | must be fleece-reinforced between coats where|| 2021-February-7 }}
<ol>
<li>{{hilite | the application is considered permanent, || 2023-June-16 }}
<li>{{hilite | a change in plane (angle) occurs|| 2021-February-7 }}, or
<li>{{hilite | there is a joint between two supports and the liquid membrane must serve as a bridge|| 2021-February-7 }}.
</ol></li>
</ol></li>
<li>{{hilite | Accessory PMMA detailing products|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>{{hilite | must be|| 2021-October-30 }} reinforced with chopped or loose fibres,
<li>{{hilite | shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted|| 2021-February-7 }},
<li>{{hilite | must be used at locations 101.6 mm (4”) or more above the ''drainage plane''|| 2021-February-7 }}, {{hilite | except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system|| 2021-October-30 }}, and
<li>{{hilite | must not be used where movement is expected|| 2021-February-7 }}.
</ol></li>
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Acceptable Application of 2-Component PMMA Around Roof Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.6.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg | link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of walls must be located at least 88.9 mm (3-1/2") above the ''drainage plane''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''roof assembly'' (i.e., on top of a parapet) shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
</li></ol>

====12.3.2.8. Reserved====

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>{{hilite | ''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counter-flashing (also see the Glossary for a colloquial use of the term). || 2023-June-16 }}
<li>{{hilite | ''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge"). || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the ''Architectural Sheet Metal Manual'' published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>{{hilite | Design drawings must detail metal flashing profiles desired for the ''project''|| 2021-June-30 }}.
<li>{{hilite | Roof materials that are UV-sensitive must be protected with metal flashings|| 2021-June-30 }}.
<li>{{hilite | Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the design specifications for ''linear metal flashing'' shall conform to the design requirements in the applicable ''waterproofing roof system'' Standard|| 2021-June-30 }}.
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 24-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
<li>{{hilite | Except for metal valley flashings (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]), ''linear metal flashings'' may be overlapped rather than seamed; each overlap must be no less than|| 2021-June-30 }}
<ol>
<li>{{hilite | 101.6 mm (4”) when fully caulked in the lap|| 2021-June-30 }}, or
<li>{{hilite | 152.4 mm (6”) when installed without caulking in the lap|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Sealants used in exposed locations must be tooled to positively shed water|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-A Minimum Required Gauge and Length for Pre-finished Galvanized Steel Cap (Coping) Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Horizontal Span !! style="width:50px;" | Minimum Slope !! style="width:50px;" | Gauge !! style="width:150px;" | Maximum Flashing Segment Length !! style="width:200px;" | Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 300 - 900 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 900 mm or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|}
::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-B Minimum Required Gauge and Length for Pre-finished Galvanized Steel Vertical Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Vertical Face !! style="width:50px;" | Gauge !! style="width:175px;" | Segment Length !! style="width:250px;" | Vertical Seam Options
|-
| Up to 152.4 mm (6") || 24 || 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || 3048 mm (120") || Butt Seams*
|}

::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]]).
<li>{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}{{hilite | (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
</li></ol>

====13.1.3.6. Cap and Counter-flashing====

<ol>
<li>{{hilite | Cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the design requirements in the applicable ''waterproofing roof system'' or gutter membrane Standard || 2023-June-16 }}.
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Refer to [[#10.3.7.2. Intersections with Waterproofing Roof | Article 10.3.7.2.]]
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>{{hilite | ''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.|| 2022-February-5 }}
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>{{hilite | When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below|| 2026-July-1 }}.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ''ASTM A653'' / ''A653M-06'' CS Type B, Z275 (G90) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel {{hilite | Grade 304|| 2026-July-1 }}''': {{hilite | minimum 0.38 mm (0.014", 28-gauge)|| 2026-July-1 }} stainless steel, Grade {{strike| Type 302, || 2025-June-3 }} 304, {{strike| 316, 2B finish to ASTM A167-82 || 2025-June-3 }} {{hilite | conforming to ASTM {{strike| A167-82 || 2025-June-3 }} A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet {{hilite | (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2) | {{hilite | Note A-13.2.1.2.(3)(2)]]) || 2026-July-1 }}.
<li>{{hilite | '''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge)) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. || 2026-July-1 }}
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ''ASTM A792''/''A792M-06'' CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Stainless Steel''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Type 302, 304, 316, 2B finish to ''ASTM A167-82''. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ''ASTM B370-81''. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard ''EN 988-1996''. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards.
<li>{{hilite | Where a ''waterproofing system'' adjoins and Architectural Sheet Metal System, ''linear metal flashings'' must be fabricated from 24-gauge steel stock|| 2021-June-30 }}.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>{{hilite | threaded screws, {{hilite | friction-type pins (i.e., for masonry or concrete), plug (inserts), || 2024-January-31 }}or rivets (where permitted), || 2023-October-28 }}
<li>{{hilite | compatible with materials they contact, || 2023-October-28 }}
<li>{{hilite | corrosion-resistant, || 2023-October-28}}
<li>{{hilite | identified in the engineered design, when part of the roof system’s wind resistance calculations (Ref. Article 3.1.3.3., “Resistance to Specified Wind Loads”), || 2023-October-28 }}
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>{{hilite | Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings || 2023-October-28 }}
<ol>
<li>{{hilite | in concealed locations must be at least No. 8 (larger if required by the engineered design), with a low-profile head. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10. (larger if required by the engineered design), shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.|| 2023-October-28 }}
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to any one of the following:
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”.
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”.
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”.
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted otherwise, all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
<li>Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the fabrication of ''linear metal flashing'' shall conform to the requirements in the applicable ''waterproofing roof system'' Standard.
<li>Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break.
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed,
<li>shall conform to the minimum requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }},
<li>shall incorporate seams conforming to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }}, and
<li>may not exceed the maximum length of 3048 mm (120").
</ol></li>
<li>{{hilite |The vertical leg of any metal flashing that overlaps roofing material must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break|| 2021-June-30 }}.
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems''),
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.1.3. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous {{hilite | or butyl-based || 2026-February-1 }} membrane used as eave protection in a ''water-shedding roof system'') (Ref. [[#Section 8.2. Materials | Section 8.2.]]).
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}
<ol>
<li>{{hilite | shall conform to the fasteners requirements in || 2024-January-31 }} [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>{{hilite | shall be firmly fastened, without distorting secured materials, || 2024-January-31 }}
<li>{{hilite | must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate || 2024-January-31 }} {{strike| must penetrate the substrate as specified in [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]], and || 2023-January-26 }}
<ol>
<li>{{hilite | through the back surface of steel framing at least 19.05 mm (3/4"), || 2024-January-31 }}
<li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
<li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
{{strike| <li>Where hidden metal clips are required, they must
<ol>
<li>be at least 24-gauge,
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 76.2 mm (3") from the bottom edge (hook), and
<li>engage drip or safety edges by a minimum of 12.7 mm (1/2").
</li></ol>
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centred between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol> || 2023-January-26 }}
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the roof side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing|| 2022-February-5 }}.
<li>{{hilite | All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article|| 2022-February-5 }}.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ({{hilite | '''Figure 13.3.2.2.-A''' || 2026-February-1 }}) or S-lock ({{hilite | '''Figure 13.3.2.S.-B''' || 2026-February-1 }} (Single) and {{hilite | '''Figure 13.3.2.S.-C''' || 2026-February-1 }} (Double)), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }},
<li>{{hilite | continuous eave flashing to which the metal panels are secured || 2023-June-16 }}, or
<li>{{hilite | the vertical face of any flashing that is concealed by a ''wall assembly'', counter-flashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap|| 2021-October-30 }}
<ol>
<li>{{hilite | is no less than 101.6 mm (4”) when fully caulked in the lap|| 2021-October-30 }}, or
<li>{{hilite | is no less than 152.4 mm (6”) when installed without caulking in the lap.|| 2021-October-30 }}
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (closed with a "rat tail").
<li>When the face of vertically-oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically-oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See {{hilite | '''Figure 13.2.2.2.-A''' || 2026-February-1 }}) must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>
<li>'''S-locked seams''' ({{hilite | '''Figures 13.2.2.2.-B''' || 2026-February-1 }} and {{hilite | '''13.2.2.2.-C''' || 2026-February-1 }}) must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
<li>'''Flat butt seams'''
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
<li>The saddle for flat butt seams must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-A''' '''Mechanical Locking Standing Seam''' Forming Part of Sentence 13.2.2.2.(11) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-B''' '''Single S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-C''' '''Double S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]] || [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 300 px]] || [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]]
|}

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | The installation of cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the application requirements in the applicable ''waterproofing roof system'' Standard || 2023-June-16 }}.
</li></ol>

<hr>
<div id=PART_14></div>

={{hilite | Part 14 - The Roof as a Platform || 2023-June-16}}=
==Section 14.1. Design==
===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. {{strike| Definitions || 2024-December-23 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. RoofStar 15-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any covering, amenity space, structure or live loads superimposed upon the ''roof system''.
</li></ol>

====14.1.3.3. Securement of Supported Structures and Equipment====

<ol>
<li>The ''Design Authority'' is responsible to specify the appropriate securement design of roof coverings, structures, and equipment, to resist ''Specified Wind Loads''.
<li>Where structural securement is desirable or required, the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12,"Penetrations and Curbs"]], and [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]).
</li></ol>

====14.1.3.4. Snow Guards====

<ol>
<li>While snow guards are not part of the ''roof system'', snow guards
<ol>
<li>must not penetrate the metal ''roof system'', and
<li>shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>The decision to use snow guards, and their selection, is the responsibility of the ''Design Authority'' and neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the roof ''system'' caused by the use or absence of snow guards.
</li></ol>

====14.1.3.5. Photovoltaic Panels====

<ol>
<li>Photovoltaic panels are considered "equipment" within the definitions used in this Standard, are not part of the ''roof system'', and therefore photovoltaic panels
<ol>
<li>must not penetrate the metal ''roof system'', and
shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>All electrical connections, distribution cables, and related systems that penetrate the ''roof system'' must be flashed with purpose-made flashings incorporating weather-head fittings (see [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]; see also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., ''Electrical Cables and Boxes'']]).
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to ASM Standard | Notes to Standard]]=

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[[RCABC Roofing Practices Manual | Home]]
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(Draft) ASM Roof Systems Standard

2026-06-22T22:16:26Z

James Klassen: /* 2.1.3.2. Roof Slope for New Construction */

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<big><big>Division B - Standards</big></big> 
<big>Water-shedding Roof Systems: Metals</big> 
<hr>
<big><big><big><big><big>RGC Standard for Architectural Sheet Metal (ASM) Roofs</big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
{{hilite | This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for Architectural Metal Roofing (Tab 8). It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''', '''''RoofStar 10-Year Guarantee''''' or '''''RoofStar 15-year Guarantee'''''. Requirements to qualify for a '''''RoofStar 15-Year Guarantee''''' are listed in each relevant Part under Section 1. All '''''RoofStar 15-Year Guarantee''''' requirements must be read together with the General Requirements for each Part in this Standard. || 2020-July-3 }}

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. {{hilite |Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.|| 2021-February-7 }}

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the {{hilite | hyperlinks embedded || 2020-July-3 }} in the body of text.

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:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Roof Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Eave, Valley, and Field Underlayment]]
|-
| [[#PART_9 | Part 9 - Roof Field (Panel Systems)]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - The Roof as a Platform]]
|-
| <hr>
|-
| [[Notes to ASM Standard | Notes to Standard]]
|-
|}

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<div style="text-align:center">
'''First Edition''': June 14, 2018
 '''Previous Edition''': June 12, 2025
 '''Current Edition''': Adopted January 20, 2026
 
All changes to this Standard are effective <big>'''February 1, 2026'''</big>
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<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>{{hilite | ''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''|| 2027-June-11 }}.
{{strike| {{hilite |''Finished roof system surface''|| 2020-February-3 }} {{hilite | means the top surface of any ''roof system'', inclusive of ballast or ''overburden''|| 2021-February-7 }}. || 2026-June-11 }}
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>{{hilite | ''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''|| 2027-June-11 }}.
{{strike| {{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.|| 2026-June-11 }}
<li>{{hilite | ''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''. || 2023-June-16 }}
<li>{{hilite | ''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy || 2025-October-25 }}.
<li>{{hilite | ''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure|| 2027-June-11 }}.
{{strike| ''Waterproofing roof system'' means an insulated or uninsulated ''roof system'', designed and constructed on roofs using a sheet or liquid-applied membrane, to exclude water. This type of ''system'' typically is installed on roof slopes less than 1:4 (3” in 12”). || 2026-June-11 }}
<li>''Water-shedding roof system'' means an insulated or uninsulated ''roof system'', designed and constructed to shed water away from a structure, not to waterproof it. This type of ''system'' typically is installed on roof slopes greater than 1:4 (3” in 12”) but may be installed on slopes as low as 1:6 (2" in 12").
</li></ol>
</li></ol>

===={{hilite | 1.1.1.5. Reserved || 2026-February-1 }}====

===={{hilite | 1.1.1.6. Objectives || 2026-February-1 }}====

<ol>
<li>Every ''roof system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.7. Responsibility for Design || 2026-February-1 }}====

<ol>
<li>Each design of a ''roof system'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.8. Pre-Design Requirements || 2026-February-1 }}====
<ol>
<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''roof assembly''.
<li>{{hilite | When any element of a ''roof system'' for a pre-fabricated building or building assembly is or will be installed off site , the ''Design Authority'' must consult with the '''''RGC''''' directly concerning '''''RoofStar Guarantee''''' coverage and wind load design (for further reference, see || 2027-February-1 }} [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee {{hilite | Article 3.2.1.2. || 2027-January-16 }}] {{hilite | in Division A of the ''Manual'' || 2027-February-1 }}.
</li></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2026-February-1 }}====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''roof assembly'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and the roof class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''roof assembly'',
<li>the potential effects of reflected heat on the ''roof assembly'',
<li>''roof system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>{{hilite | In addition to Sentence (1), all ''projects'' shall comply with || 2024-October-20 }}
<ol>
<li>{{hilite | the ''project'' specifications and drawings, and || 2024-October-20 }}
<li>{{hilite | the ''manufacturer's'' published installation requirements || 2024-October-20 }}.
</li></ol>
</li></ol>

====1.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>{{hilite | To qualify for a '''''RoofStar 15-year Guarantee''''', each ''project'' must be designed and constructed in compliance with the requirements published in this Standard, including the following standards which are linked to their referenced Parts || 2022-February-5 }}:
<ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is mandatory ([[#2.1.2.2. RoofStar 15-Year Guarantee |Article 2.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | Only panels with a hidden clip securement system may be used to qualify for a '''''RoofStar 15-year Guarantee'''''. Flange-fastened panels are not permitted ([[#9.1.2.2. RoofStar 15-Year Guarantee |Article 9.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | All penetrations must be flashed by using the split panel detail; flexible boot flashings secured with gasketed screws are not permitted ([[#12.1.2.2. RoofStar 15-Year Guarantee |Article 12.1.2.2.]])|| 2022-February-5 }}.
<li>{{hilite | All penetration flashings that do not incorporate a settlement cap must be fitted with two storm collars separated by no more than 75 mm (3”), and each storm collar must be sealed with an untooled bead of sealant [[#12.1.2.2. RoofStar 15-Year Guarantee | Article 12.1.2.2.]]|| 2022-February-5 }}
</li></ol>
</li></ol>

===={{hilite | 1.1.2.3. Quality Control || 2026-February-1 }}====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''roof assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for projects further away than 100 km),
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

===={{hilite | 1.1.2.4. Quality Assurance || 2026-February-1 }}====
(See [[Notes to ASM Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2026-February-1 }}]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''roof system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of roofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Roof Systems====
(See [[Notes to ASM Standard#A-1.1.3.1.| Note A-1.1.3.1.]])

<ol>
<li>{{hilite | This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as || 2023-June-16 }}
<ol>
<li>{{hilite | uninsulated ''systems'' in which metal panels are secured directly to the ''roof deck'' or an overlay, and || 2023-June-16 }}
<li>{{hilite | insulated ''systems'', in which metal panels are installed above insulation and other roof system materials, and|| 2023-June-16 }} {{hilite | should be secured to the ''roof deck'' using means and methods that reduce thermal bridging (e.g., thermally non-conductive clips, girts, or bearing plates) || 2027-February-1 }}{{hilite | (See|| 2027-February-1 }}[[#7.1.3.4. Thermal Resistance and Layering |{{hilite | Article 7.1.3.4., ||2027-February-1 }}]]{{hilite |Sentence (4) and|| 2027-February-1 }}[[Notes to ASM Standard#A-1.1.3.1.|{{hilite | Note A-7.1.3.4.)|| 2027-February-1 }}]].
</li></ol>
<li>Architectural metal roofing systems accepted for use in the '''''RoofStar Guarantee Program''''' must be roll-formed hydrokinetic (water-shedding) systems commonly installed over solid roof ''decks'' or rigid insulation panels, but may also be intermittently supported when engineered to resist anticipated live loads (metal panels designed for use as structural (spanning member) systems are accepted for a '''''RoofStar Guarantee''''' only as an architectural metal panel system).
</li></ol>

===={{hilite | 1.1.3.2. Accessibility for Maintenance || 2026-February-1 }}====

<ol>
<li><div class="recommended">All roofs with a field elevation greater than 7620 mm (25’) above grade should incorporate access to the roof by stairs and a doorway, or with a properly located roof hatch.
<li>Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, in a manner consistent with worker safety regulations, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations''.
</li></ol>

===={{hilite | 1.1.3.3. || 2026-February-1 }} Snow Loads====

<ol>
<li>In this Standard, a ''high snow load area'' is considered a regional area with a ''Specified Snow Load'' higher than 3.5 kPa (See [[Notes to ASM Standard#A-1.1.3.2.| Note A-1.1.3.2.]]).
<li>Roofs subject to high snow loads must be designed with a supporting deck structure thick enough to support the anticipated live loads, within the acceptable deflection limits defined by the "British Columbia Building Code".
<li>{{hilite | In locations where moderate to heavy snow cover or high snow load conditions are possible or expected, the ''Design Authority'' should give consideration to || 2026-February-1 }} {{strike| Consideration should be given to || 2025-February-1 }}
<ol>
<li>slope,
<li>entrances and exits,
<li>penetrations,
<li>valley construction,
<li>proper intake and exit ventilation, irrespective of snow cover and drifting, and
<li>penetrations and their functionality.
</li></ol>
<li>{{strike| Roofs subject to high snow loads should be designed || 2025-February-1 }}{{hilite | Where snow fences or guards are required by the ''Design Authority'', they should be utilized only where a hazard to the public or property exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid panel distortion and damage to the ''roof system'' || 2026-February-1 }}.
{{strike| <ol>
<li>with full support for metal panels,
<li>with generous slope to shed snow from the roof surface (a slope of at least 1:1.5 (8” in 12”) is strongly recommended),
<li>to utilize a RoofStar-accepted self-adhered eave protection membrane as underlayment over the entire deck surface, regardless of slope and the requirements published elsewhere in this Standard,
<li>with widening valleys (from peak to eave),
<li>so that penetrations are located near the ridge line, and
<li>to utilize snow fences or guards (if so required by the ''Design Authority'') only where a hazard to the public exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid disfigurement and damage to the roof system.
</li></ol> || 2025-February-1 }}
</li></ol>

===={{hilite | 1.1.3.4. || 2026-February-1 }} Ventilation====

<ol>
<li>{{hilite | Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | {{hilite | While the || 2027-February-1 }} design and selection of the ventilation system is the responsibility of the ''Design Authority'',|| 2021-June-30 }} attic ventilation
<ol>
<li>{{hilite | must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, Article 9.19.1.1., "Venting")|| 2027-February-1 }},
<li>{{hilite | must should promote proper convection, drawing cool air from the lowest point in and exhausting warm air out near the ridge, and || 2027-February-1 }}
<li>{{hilite | shall be designed so that exhaust vents are located on only one side of a ridge or hip line, within 609.6 mm (24”) of a ridge, evenly spaced along the ridgeline (vents installed on opposite or adjacent sides of a roof plane, or staggered across the plane of drainage, will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Tall exhaust vents are recommended in regions where snow cover is common || 2027-February-1 }}.
<li>Attic ventilation {{hilite |may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents|| 2021-June-30 }},
<li>{{hilite | gable end vents|| 2021-June-30 }} {{hilite | (for exhaust only)|| 2027-February-1 }},
<li>{{hilite | {{strike| hip || 2026-January-16 }} {{hilite | powered or turbine exhaust || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | static {{hilite | (passive) || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | ridge {{hilite | and hip || 2027-February-1 }} vents|| 2021-June-30 }}, or
<li>{{hilite | cupolas|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"])|| 2021-June-30 }}.
<li>{{hilite | Ventilation must be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite | the slope of the roof|| 2021-June-30 }},
<li>{{hilite | the vented area|| 2021-June-30 }}, and
<li>{{hilite | the design and configuration of the roof structure|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ventilation must be provided for|| 2021-June-30 }}
<ol>
<li>{{hilite | roofs over cathedral ceilings|| 2021-June-30 }}, and
<li>{{hilite | compact insulated roof assemblies|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | {{hilite | are {{strike| acceptable and are || 2026-January-16 }} recommended for all areas with vaulted ceilings|| 2021-June-30}}|| 2027-February-1 }}, and
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Vents shall conform to the material and product requirements in || 2027-February-1 }} [[#12.2.1.4. Air Vents | {{hilite | Article 12.2.1.4.|| 2027-February-1 }}]] {{hilite |and must be selected for their ability to resist intrusion by insects, vermin, wind-driven debris, rain, or snow; leaks attributed to roof vents are not covered by a '''''RoofStar Guarantee'''''|| 2027-February-1 }}.
</li></ol>

====1.1.3.5. Hot Works====
(See [[Notes to ASM Standard#A-1.1.3.5.| Note A-1.1.3.5.]])

<ol>
<li>{{hilite | The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]) || 2021-February-7 }}.
<li>{{hilite | When the ''project'' involves Hot Work, the ''Design Authority'' must either || 2021-February-7 }}
<ol>
<li>{{hilite |pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire sensitive by the ''Contractor'' as part of the risk assessment process || 2021-February-7 }}, or
<li>{{hilite | provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project'' || 2021-February-7 }}.
</li></ol>
</li></ol>

===={{hilite | 1.1.3.6. Variances || 2021-June-30 }}====

<ol>
<li>{{hilite | When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must|| 2021-June-30 }}
<ol>
<li>{{hilite | identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned)|| 2021-June-30 }},
<li>identify the ''Contractor'' (if awarded),
<li>{{hilite | articulate the nature of the design problem|| 2021-June-30 }},
<li>{{hilite | identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")), || 2023-June-16 }}
<li>{{hilite | cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.)|| 2021-June-30 }}, and
<li>provide design drawings, photographs, and roof plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>{{hilite |Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''|| 2021-June-30 }}.
<li>{{hilite |A Variance may be unrestricted in its scope, or it may include one or more conditions, or a restriction in coverage, that will affect the design and construction of the ''project'', to accommodate the varied standard, but this is at the discretion of the '''''Guarantor'''''|| 2021-June-30 }}.
<li>{{hilite |Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm|| 2021-June-30 }}.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)

(See [[Notes to ASM Standard#A-1.1.4.| Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>
</li></ol>

====1.1.4.2. Complete Roof System Replacement====

<ol>
<li>Complete roof system replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Roof system'' replacement means the complete removal and replacement of all ''roof system'' and metal flashing materials, exclusive of the air or vapour ''control layers'', and only new replacement materials shall be installed.
<li>Subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]], the decision to reuse and repair an existing air or vapour ''control layer'' remains the responsibility of the ''Design Authority''.
<li>''Roof system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Reserved====

====1.1.4.4. Reserved====

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a ''control joint'' securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If ''project'' conditions do not allow for a curb joint, the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (See [[#1.1.3.6._Variances |Article 1.1.3.6.]]); any alternative design must
<ol>
<li>include design specifications and construction details showing a positive water cut-off that fully isolates the existing roof from the new roof, and
<li>show how the new ''roof system'' will be easily distinguishable from the existing roof system.
</li></ol>
<li>{{hilite | Repairs or renovations to an existing ''roof system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''roof system''). || 2023-June-16 }}
<li>{{hilite | Modifications or additions to a guaranteed roof are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''. || 2023-June-16 }}
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: {{hilite | Contractor Requirements || 2021-February-7 }}====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====
(See [[Notes to ASM Standard#A-1.3.3.2. | Note A-1.3.3.2.]])

<ol>
<li>{{hilite | The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of {{hilite |the ''project''||2022-February-5 }}.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible to make a permanent seal or install overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]].) || 2021-February-7 }}.
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision, manufacturing, and installation of a RoofStar-guaranteed ''Architectural Sheet Metal Roof System'' shall be undertaken only by established employees of ''Contractors'', each having obtained a valid
<ol>
<li>Architectural Sheet Metal Journeyperson Certificate of Qualification, or
<li>Sheet Metal trade ticket, together with at least five (5) years of documented experience installing and supervising the installation of ASM roofing (ref. RCABC Policy A-248).
</li></ol>
</li></ol>

====1.3.2.4. {{hilite | Contractor Submittals || 2026-February-1 }}====
(See also [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] {{strike| and [[#9.2.1.2. Roll Forming Machines and Mill Certificate | Article 9.2.1.2.]] || 2025-February-1 }})

<ol>
<li>{{strike| {{hilite | To qualify for a '''''RoofStar Guarantee''''', the ''Design Authority'' must || 2023-June-16 }} || 2022-October-28 }}{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'' sealed engineered shop drawings conforming to the requirements in || 2023-October-28 }} [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | and || 2023-October-28 }} [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>{{hilite | When tall clips are used as an alternative to EPDM pads (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]), {{hilite | the ''Contractor'' must provide the '''''Guarantor''''' with stamped, written assurance from the ''Design Authority'' that || 2024-January-31 }}
<ol>
<li>{{hilite | the clips will adequately secure and support the elevated panels, and || 2024-January-31 }}
<li>{{hilite | the panels are suitable as spanning members, and will support anticipated live loads, including loads during construction. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The ''Contractor'' is responsible for providing to the '''''Guarantor''''' a copy of the mill certificate for the sheet metal used to form metal panels and related flashings (the certificate may be provided directly, or shown to the observer who shall take a photographic record of the certificate for the '''''Guarantor''''' || 2026-February-1 }} (See [[#9.2.1.2. Roll Forming Machines and Mill Certificate | {{hilite | Article 9.2.1.2. || 2026-February-1 }}]]).
{{strike| <ol>
<li>{{hilite | document the wind resistant design on a Schedule S form (Specialty engineering; see the "British Columbia Building Code", current edition), and || 2023-June-16 }}
<li>{{hilite | submit the Scheduled S form to the '''''Guarantor''''' as part of the ''project'' record. || 2023-June-16 }}
</li></ol> || 2022-October-28 }}
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>

====1.3.3.2. Complete Roof System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.3. Partial Roof Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.4. Reserved====

====1.3.3.5. Tie-ins and Additions to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a curb joint securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of curb joints, the new roof system must be fully isolated from the existing roof system with a positive water cut-off that renders the new roof system easily distinguishable from the existing ''roof system''.
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>{{hilite | When a ''roof system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation) || 2023-June-16 }}
<ol>
<li>{{hilite | the securement of new materials || 2023-June-16 }} ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>{{hilite | deck or wall overlays || 2023-June-16 }} ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>{{hilite | continuity of air and vapour controls || 2023-June-16 }} ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>{{hilite | thermal resistance || 2023-June-16 }} ([[#Part 7 - Insulation | Part 7]],
<li>{{hilite | eaves, valleys, and underlayment || 2023-June-16 }} ([[#PART 8 - Eave, Valley, and Field Underlayment | Part 8]]),
<li>{{hilite | metal panels || 2023-June-16 }} ([[#Part 9 - Roof Field (Panel Systems) | Part 9]]),
<li>{{hilite | perimeter details || 2023-June-16 }} ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>{{hilite | drains || 2023-June-16 }} ([[#Part 11 - Drainage | Part 11]]),
<li>{{hilite | penetrations and curbs || 2023-June-16 }} ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>{{hilite | linear metal flashings || 2023-June-16 }} ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>{{hilite | Modifications to an existing ''roof system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', drains, or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated. || 2023-June-16 }}
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to ASM Standard#A-2 | Note A-2]])
<div id="DECK_CONDITION"></div>

=={{hilite | Section 2.1. Design || 2021-June-30 }}==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====
({{hilite | See '''Figure 2.1.1.2.-A''' || 2026-February-1 }})

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a roof with a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>{{hilite | ''Deck overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials|| 2021-June-30 }}.
<li>''Extreme Slope'' means a roof with a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' (roof) means a roof with a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>{{hilite | ''Sheathing'' means a rigid panel material secured directly onto framing. || 2024-January-31 }}
<li>''Steep Slope'' means a roof with a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>{{hilite | ''Supporting deck'' ("deck")|| 2021-June-30 }} {{hilite | means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'')|| 2021-June-30 }}.
<li>{{hilite | ''Wall''|| 2021-June-30 }} {{hilite | means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions")|| 2021-June-30 }}.
<li>{{hilite | ''Wall overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials|| 2021-June-30 }}.
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2026-February-1 }} {{hilite | Forming Part of Article 2.1.1.2. || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 450 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed with a minimum slope of 1:6 (2” in 12”), which may not be reduced through a written Variance {{hilite | (Note: curved or barrel-shaped roofs may be permitted under a written Variance, subject to a review by the '''''Guarantor'''''). || 2023-June-16 }}
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a roof to achieve proper drainage{{hilite |, taking into consideration|| 2027-June-11 }} {{strike| and must take into consideration || 2026-June-11 }}
<ol>
<li>the anticipated deflection and settlement of the structure, which may interfere with drainage{{hilite | , and || 2027-June-11 }}
<li>{{hilite | the limitations of panel seams (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2027-June-11 }}.
</li></ol>
{{strike| <li>Throughout this Standard, the defined terms of [[#2.1.1.2. Defined Terms | Article 2.1.1.2.]] apply (See '''Figure 2.1.1.2.-A''' for an illustrated guide to the above definitions). || 2025-February-1 }}
<li>Roofs with designed slopes less than the stated minimums in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.3.]] (i.e., curved applications; see also [[#9.1.3.4. Curved Panel Systems | Article 9.1.3.4.]]) will be considered for a '''''RoofStar Guarantee''''' provided
<ol>
<li>the design and installation details are submitted in writing to the '''''Guarantor''''' prior to the tendering of documents, and
<li>a written Variance is issued by the '''''Guarantor''''' prior to close of tender.
</li></ol>
</li></ol>

====2.1.3.2. Roof Slope for New Construction====

<ol>
<li>All roof slopes must be designed to comply with the slope limitations of metal panels seam types in Article 9.1.3.1.
<li>{{hilite | When the designed slope of a metal panel roof with mechanical locking seams|| 2027-June-11 }}{{strike| Roofs with a designed slope || 2026-June-11 }}
<ol>
<li>is equal to or greater than 1:6 (2" in 12"), a written Variance from the '''''Guarantor''''' is not required but the design must nevertheless conform to the requirements in this Standard, howsoever they apply.
{{strike| equal to or greater than 1:6 (2" in 12") do not require a written Variance from the '''''Guarantor''''' and must be designed to conform to the requirements in this Standard, howsoever they apply,|| 2026-June-22 }}
<li>is less than 1:6 (2" in 12"), the design
<ol>
<li>will be permitted {{strike| are permissible || 2026-June-11 }} only through a written Variance from the '''''Guarantor''''',
<li>{{hilite | shall|| 2027-June-11 }} {{strike| be designed to || 2026-June-11 }} conform to the requirements in this Standard, and
<li>shall comply with any and all requirements or conditions stipulated in the Variance.
</li></ol>
<li>is less than 1:4 (3" in 12"), the engineered shop drawing package must be accompanied by manufacturer’s literature confirming that this application is acceptable.
</li></ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) {{hilite | for a metal panel roof with mechanical locking seams|| 2027-June-11 }} is {{strike| a requirement|| 2026-June-11 }}{{hilite | required|| 2027-June-11 }} for a '''''RoofStar 15-year Guarantee''''' (See [[#2.1.2.2. RoofStar 15-Year Guarantee | Article 2.1.2.2.]] {{hilite | and seam requirements in '''Table 9.1.3.3.-A'''|| 2027-June-11 }}).|| 2022-February-5 }}
</li></ol>

====2.1.3.3. Roof Slope for Replacement Roofing====

<ol>
<li>{{hilite | The requirements in || 2023-June-16 }} [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]] {{hilite | and || 2023-June-16 }} [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] {{hilite | apply to replacement roofing. || 2023-June-16 }}
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Roofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''roof system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.1.| Note A-2.1.5.1.]])

<ol>
<li>Steel ''decks'' must be acceptable to the roof system manufacturer and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
</li></ol>

====2.1.5.2. Concrete Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Direct contact between metal roofing and concrete, light concrete, stone and mortar '''must be avoided'''.
<li>The selection of a suitable underlay, insulation, and method of attachment to a concrete ''deck'' or ''wall'' is the responsibility of the ''Design Authority''.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.3.| Note A-2.1.5.3.]])

<ol>
<li>Wood decks
<ol>
<li>must conform to the material requirements of the Code (see "British Columbia Building Code", Division B, Part 9, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s923 Article 9.23.16.2.. "Material Standards"]),
<li>shall be free of loose knots or cracks,
<li>{{hilite | shall have a moisture content acceptable to the ''manufacturer'' (for self-adhered or adhered membranes, moisture content shall not exceed 19%; Ref. Canadian Wood Council, || 2023-October-28 }} [https://cwc.ca/en/why-build-with-wood/durability/durability-hazards/moisture-and-wood/ "Moisture and Wood"]), and
<li>{{hilite |shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction || 2021-February-7 }}; specifying the structural suitability of fasteners is the responsibility of the ''Design Authority''.
</li></ol>
<li>Differential edge movements or deflection exceeding 1/360 of the span must be prevented
<ol>
<li>by constructing the ''deck'' with tongue-and-groove plywood, and supporting the non-grooved edges with joists or solid blocking, or
<li>by supporting butt joints at unsupported edges with solid blocking.
</li></ol>
<li>All wood decks shall be
<ol>
<li>at least 15.88 mm (5/8") thick, and
<li>capable of the required pull-out resistance for expected fasteners (knotholes and cracks in decks shall be considered defects and must be covered with sheet metal, mechanically fastened in place),
</li></ol>
<li>{{hilite | All mass timber or wood board ''decks'' must be covered with a properly secured, suitable overlay to || 2021-February-7 }}
<ol>
<li>ensure the integrity of the underlayment as mass timber elements contract and expand, and
<li>{{hilite | protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2021-February-7 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li>All types of wood ''decks'' should be roofed promptly after installation.
</li></ol>

====2.1.5.4. Plywood Roof Decks====

<ol>
<li>Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to ASM Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All non-ferrous (i.e. copper, zinc) metal panel roof systems must be installed over tongue-and-groove plywood decks conforming to the minimum material properties and thicknesses stated in this Article.
<li>{{hilite | All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see || 2023-June-16 }} [[#2.1.5.5. Mass Timber Roof Decks | Article 2.1.5.5.]], [[#2.1.5.6. Non-veneered Panel Roof Decks | Article 2.1.5.6.]], and [[#2.1.5.7. Wood Board Roof Decks | Article 2.1.5.7.]]) {{hilite | shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be || 2023-June-16 }}
<ol>
<li>{{hilite | at least 15.88 mm (5/8") thick, unless exceeded by the specified securement design || 2023-June-16 }} (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>{{hilite | free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place, || 2023-June-16 }}
<li>{{hilite | securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing, || 2023-June-16 }}
<li>{{hilite | properly gapped between panels, and || 2023-June-16 }}
<li>{{hilite | fully supported along all panel edges. || 2023-June-16 }}
</li></ol>
</li></ol>

====2.1.5.5. Mass Timber Roof Decks====

<ol>
<li>{{hilite | Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated timbers (Glulam), are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in || 2023-June-16 }} [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
</li></ol>

====2.1.5.6. Non-veneered Panel Roof Decks====

<ol>
<li>{{hilite | Oriented Strand Board (OSB) is not acceptable deck material for Architectural Sheet Metal panel ''roof systems'' || 2023-June-16 }}.
</li></ol>

====2.1.5.7. Wood Board Roof Decks====

<ol>
<li>Wood board ''decks''
<ol>
<li>must be overlaid with plywood in keeping with the general requirements for wood ''decks'' in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
<li>{{hilite | must be removed and replaced with new material when they are damaged or excessively cupped (excessive cupping is considered 25.4 mm (1”) or more when measured against the mid-span deflection of the ''deck''). || 2023-June-16 }}
</li></ol>
</li></ol>

==={{hilite | 2.1.6. Reserved || 2024-October-20 }}===

===2.1.7. Walls===
(See [[Notes to ASM Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====

<ol>
<li>{{hilite | ''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials|| 2021-June-30 }}.
<li>{{hilite | Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings|| 2021-June-30 }}; {{hilite | when sheathing is unsuitable, it must be overlaid with an accepted wall overlay. || 2024-January-31 }}
<li>{{hilite | ''Sheathing''{{strike| , defined as a rigid panel material secured directly onto framing, || 2023-January-26 }} is considered a wall surface for the purpose of this Standard|| 2021-June-18 }}.
<li>{{hilite | ''Wall'' surfaces {{hilite | suitable for || 2024-January-31 }} receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the|| 2021-June-18 }} ''finished system surface'' {{hilite | (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]])|| 2021-June-18 }}.
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to ASM Standard#A-2.1.8.| Note A-2.1.8.]] concerning electrical systems, fire and shock hazards, and Rule 12-022 of the Canadian Electrical Code, Part I)

====2.1.8.1. New Construction====

<ol>
<li>Electrical cables, raceways or boxes shall not be installed within a ''roof assembly'' {{hilite | ({{hilite | '''Figure 2.1.8.1.-A''' || 2026-February-1 }})|| 2021-February-7 }}.
<li>Electrical cables, raceways or boxes shall not be installed on the underside of a ''roof assembly'', unless
<ol>
<li>the ''supporting deck'' structure equals or exceeds 76.2 mm (3”) in thickness {{hilite | ({{hilite | '''Figure 2.1.8.1.-B''' || 2026-February-1 }})|| 2021-February-7 }}, or
<li>the cables, raceways or boxes are installed and supported so there is a separation of not less than 38.1 mm (1-1/2") measured between the underside of the ''roof assembly'' and the electrical installation {{hilite | ({{hilite | '''Figure 2.1.8.1.-C''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
<li>Notwithstanding either (1) and (2), cables or raceways shall be permitted to pass through a ''roof assembly'' for connection to electrical equipment installed on the roof, provided that the passage through the roof is a part of the ''roof assembly'' design.
<li>{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing|| 2021-February-7 }} {{hilite | ({{hilite | '''Figure 2.1.8.1.-D''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A''' '''Prohibited Installation of Electrical Conduit''' Forming Part of Sentence 2.1.8.1.(1)|| 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B''' '''Roof Decks and Electrical Conduit Installation''' Forming Part of Clause 2.1.8.1.(2)(1) || 2026-February-1 }}(Click to expand)
|-
| [[File:Figure 2.1.8.1.-A (Electrical).jpg | link=https://rpm.rcabc.org/images/f/f5/Figure_2.1.8.1.-A_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-B (Electrical).jpg | link=https://rpm.rcabc.org/images/3/32/Figure_2.1.8.1.-B_%28Electrical%29.jpg | 350 px]]
|}
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-C''' '''Minimum Separation Between Roof Assembly and Electrical Conduit''' Forming Part of Clause 2.1.8.1.(2)(2) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D''' '''Electrical Conduit Elevated Above Roof Assembly''' Forming Part of Sentence 2.1.8.1.(4) || 2026-February-1 }} (Click to expand)
|-
| [[File:Figure 2.1.8.1.-C (Electrical).jpg | link=https://rpm.rcabc.org/images/d/db/Figure_2.1.8.1.-C_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-D (Electrical).jpg | link=https://rpm.rcabc.org/images/e/ef/Figure_2.1.8.1.-D_%28Electrical%29.jpg | 350 px]]
|}

<div class="col-md-12">
 
</div>

====2.1.8.2. Roof Replacement and Alterations====

<ol>
<li>If existing electrical cables or boxes do not conform to the requirements in [[#2.1.8.1. New Construction | Article 2.1.8.1.]], the ''Design Authority'' must consider the attachment of the ''roof system'' above the electrical system, and the requirements set out in [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]].
<li>The ''Design Authority'' should
<ol>
<li>specify protection of existing electrical cables and boxes (a 4.76 mm (3/16”) steel plate may be used to minimize the possibility of fastener penetration and cutter damage, {{hilite | but protection plates may interfere with mechanical fasteners used to secure the ''roof system'' against wind uplift, even for future replacement roofing)|| 2021-February-7 }}, and
<li>provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes.
</li></ol>
</li></ol>

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) {{hilite | (These panels are specifically {{hilite | designed to receive roof membranes|| 2021-June-30 }} and may be installed horizontally or vertically)|| 2021-June-30 }}.
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), or
<li>{{hilite | plywood, having a minimum thickness of 12.7 mm (1/2”)|| 2021-June-30 }}.
</li></ol>
<li>Where wall sheathing is unsuitable to receive roofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be constructed with a minimum slope of 1:6 (2” in 12”).
</li></ol>
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of deck and wall structures, and their suitability for the application of roofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Roof Assembly=
==Section 3.1. Design==
===3.1.1. General===
===={{hilite | 3.1.1.1. Scope || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>This Part applies to all new roofs, and to both full and partial replacement ''roof systems''.
<li>This Part sets out the requirements for
<ol>
<li>roofs that support ''overburden'', or fixed amenities and equipment, and
<li>roofs where only part of the ''system'' must be replaced.
</li></ol>
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.2. | Note A-3.1.1.2.]])

<ol>
<li>The requirements in this Part intend to support and conform to or exceed the Building Code.
</li></ol>

===={{hilite | 3.1.1.3. Limit of Liability under RoofStar Guarantee || 2023-June-16 }}====

<ol>
<li>{{hilite |Notwithstanding [[#3.1.1.2. Intent | Article 3.1.1.2.]], the materials presented herein are based on an interpretation of the Code and are not the Code itself; therefore, the reader is responsible to exercise good judgement, and to read, understand and comply with the Code, as and how it applies to the reader’s particular ''project'' and its design requirements.
<li>Where the Code can be shown to exceed the requirements, guiding principles, and recommendations of this Part or any related Part in this Standard, the Code shall prevail|| 2021-October-30 }}.
<li>{{hilite |Compliance with this Part or the Code does not guarantee that a roof will not succumb to forces exerted by wind, and therefore neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, a roof system caused by wind; too many variables beyond the control of this Standard affect the wind resistance performance of a ''roof system'', including (without limitation)|| 2021-October-30 }}
<ol>
<li>{{hilite | the ''continuity'' or discontinuity of air and vapour ''control layers'' of the entire building enclosure|| 2021-October-30 }},
<li>{{hilite | openings in the building (windows and doors, which are often occupant-controlled and not static)|| 2021-October-30 }}, and
<li>{{hilite | wind strength, which may exceed the codified numeric wind speed values used to calculate wind resistance for the ''roof system'' || 2021-October-30 }} (Ref. "British Columbia Building Code 2024", Division B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=762 Appendix C, "Table C-1"]).
</li></ol>
</li></ol>

===={{hilite | 3.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }} || 2023-June-16 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Registered Professional'' has the same meaning as that used in the "British Columbia Building Code 2024", Division C, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"].
<li>''Specified Wind Load'' means the calculated force of wind exerted on the roof of a specific building, according to the requirements in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=496 Section 4.1., "Structural Loads and Procedures"].
</li></ol>
</li></ol>

===3.1.2. Guarantee Term Requirements===
====3.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===3.1.3. All Systems===
===={{hilite | 3.1.3.1. Responsibility for Design || 2023-June-16 }}====

<ol>
<li>The ''Design Authority'' is responsible for determining ''Specified Wind Loads'' for each ''roof system'' and each roof area of a ''project'', including roofs that support ''Vegetated Roof Systems'' or any other ''overburden'', amenities, or equipment.
<li>Acceptance of a roof for a '''''RoofStar Guarantee''''' is predicated on the assumption that the ''Design Authority'' has performed Due Diligence with respect to ''Specified Wind Loads'' and has provided the ''Contractor'' with sufficient information to construct a ''roof system'' that complies with the Code.
</li></ol>

===={{hilite | 3.1.3.2. Calculation of Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
<ol>
<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
<li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to ASM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
</li></ol>
<li>Each roof area, at each level (elevation), shall be divided into three principal roof zones ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}), and the ''Design Authority'' shall be responsible for calculating the ''Specified Wind Loads'' for each zone (Ref. the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=535 Article 4.1.7.6., "External Pressure Coefficients for Low Buildings"]).
<li>Roof zones are defined in this Standard as follows:
<ol>
<li>'''Field (F)''' – the interior of the roof bounded by the ''Edge'' and the ''Corners''.
<li>'''Edge (E)''' – the perimeter zone (minus the corners), measured as either 10% of the smallest building width ("least horizontal dimension"), or 40% of the building height, whichever is less. Notwithstanding the requirements in the "British Columbia Building Code", the ''Edge'' zone shall not be less than 2.0 m (7').
<li>'''Corner (C)''' – part of the perimeter but not less than 2.0 m x 2.0 m (7’ x7’) in size, the ''Corner'' area is defined by the ''Edge'' in both directions at the corners. Where the roof geometry includes an inside corner, the ''corner'' zone dimensions shall be the same as those for an outside corner, applied equidistant in each direction from the inside corner ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}).
</li></ol>
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.1.-A Water-shedding Systems 2.jpg|link=https://rpm.rcabc.org/images/c/c7/Figure_3.1.-A_Water-shedding_Systems_2.jpg | 500 px]]
|}
 
<li>A roof area that is divided into smaller segments by means of ''control joints'' (roof dividers, i.e., a fire wall) or ''expansion joints'', shall be considered one roof area for the purpose of calculating the ''Specified Wind Loads'', unless the height of a ''control joint'' or ''expansion joint'' exceeds 1 m (39"), in which case the ''Specified Wind Loads'' for each roof segment shall be calculated separately (See {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When a building is designed with multiple roof levels (at different elevations), and the roofs are adjacent each other (having a common wall), the ''Specified Wind Loads'' for each level, and for each roof area on that level, shall be calculated separately from loads for the adjacent level, unless the elevation difference between adjacent roof levels is less than 1.524 m (5’).
<li>When the shape of a single-level roof varies in width or length, the smallest width dimensions shall be used in the calculation of ''Specified Wind Loads'' (Ref. “minimum effective width” as defined in the "British Columbia Building Code", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=530 Article 4.1.7.2., "Classification of Buildings"]).
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Divided by a Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(4) || 2026-February-1 }} (Click to expand illustration)
|-
| colspan="1"; style="text-align:center;width:450px;" | [[File:Figure 3.1.-B Water-shedding Systems.jpg|link=https://rpm.rcabc.org/images/8/8e/Figure_3.1.-B_Water-shedding_Systems.jpg | 500 px]]
|}
 
<li>When a roof area intersects the corner of a wall, the ''Edge'' zone on either side of the wall corner must be treated as a roof ''Corner'' (2 x C) {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When an existing roof system is specified for partial replacement, the ''Design Authority'' must
<ol>
<li>calculate the ''Specified Wind Loads'' for the roof,
<li>determine if securement of the remaining roof components (left in situ) is sufficient to resist the ''Specified Wind Loads'',
<li>determine a suitable method of securement or have the ''system'' of securement engineered, and
<li>calculate and design securement for any structures or equipment.
</ol></li>
<li>''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement (See also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., "Electrical Cables and Boxes"]]).
<li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
<li>Securement of an adjoining ''waterproofing system'' shall be made in accordance with the requirements in the applicable Standard.
</li></ol>
</li></ol>

===={{hilite | 3.1.3.3. Resistance to Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>The wind uplift resistance capabilities of the selected ''roof system'' must equal or exceed the ''Specified Wind Loads'' calculated for each roof zone to which the ''system'' will be applied (see [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]]).
<li>Engineered designs to resist wind uplift may refer to the "British Columbia Building Code", Div. B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=764 Appendix C, "Table C-2"], which lists various types of loads, including wind loads, for specific reference locations throughout the province.
<li>Each engineered design must include, without limitation, the following:
<ol>
<li>Metal panel profile and gauge
<li>Type of clips
<li>Bearing plates
<li>Drag load components
<li>Fasteners (type, size and spacing)
<li>Roof assembly components (i.e. underlayment, insulation)
<li>Deck Substrate
</li></ol>
</li></ol>

===={{hilite | 3.1.3.4. Resistance to Other Loads || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.3.4. | Note A-3.1.3.4.]])

<ol>
<li>In addition to its capacity to resist ''Specified Wind Loads'', the ''roof system'' must be capable of resisting or accommodating
<ol>
<li>all anticipated live and dead loads, including (without limitation) other environmental loads, such as rain and snow, expected for the building’s size and location,
<li>gravity ("drag") loads,
<li>loads from ''overburden'' (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
</li></ol>

====3.1.3.5. {{hilite | Reserved || 2026-February-1 }}====

===3.1.4. Insulated Roof Systems===
===={{hilite | 3.1.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>New and fully replaced ''insulated systems'' shall satisfy the requirements of the "British Columbia Building Code" and this Part, and shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.1.5. Uninsulated Roof Systems===
===={{hilite | 3.1.5.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be designed for securement directly to the ''roof deck''.
</li></ol>

===3.1.6. Reserved===

===3.1.7. Roof Replacement and Alterations===
===={{hilite | 3.1.7.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads'' and must follow the design requirements specified by the ''Design Authority''.
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===
===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The ''Design Authority'' should specify the correct type of fastener, keeping in mind
<ol>
<li>pull-out strength, and
<li>corrosion resistance (contributing factors to fastener corrosion may include dissimilar metal contact, excessive building humidity, corrosive chemicals within components of the ''roof system'', or corrosive elements provided within the building envelope etc.).
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Fasteners
<ol>
<li>used to secure metal panels or clips shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and
<li>used to secure linear metal flashings shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>
</li></ol>

==Section 3.3. Application==
===3.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''',
</li></ol>

===3.3.2. All Systems===
====3.3.2.1. Securing Systems with Mechanical Fasteners====
({{hilite | See '''Figure 3.3.2.1.-A''' || 2021-October-30 }})

<ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}
<ol>
<li>{{hilite | be secured to a firm support, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>Concealed fasteners should provide clearance for the underside of the metal panel and must be of a material compatible with the panel or metal clip.
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}

===3.3.3. Insulated Roof Systems===
===={{hilite | 3.3.3.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Insulated systems'' shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.3.4. Uninsulated Roof Systems===
===={{hilite | 3.3.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be secured with clips fastened to the ''roof deck'', in keeping with the engineered design requirements (Ref. [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]) and conforming to the material requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]
</li></ol>

===3.3.5. Reserved===
===3.3.6. Roof Replacement and Alterations===
===={{hilite | 3.3.6.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>''Roof systems'' that are removed and replaced in their entirety (excluding the air or vapour controls, which may be left in place at the discretion of the ''Design Authority'') must be secured following the requirements for new ''roof systems''.
</li></ol>

===={{hilite | 3.3.6.2. Partial Roof Replacement || 2023-June-16 }}====

<ol>
<li>When only a portion of an existing ''roof system'' is specified for replacement, the new materials must be secured to resist wind ''Specified Wind Loads'', following the design specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'' means a material used in a roof or grade-level waterproofing ''system'' that protects a building interior from water. ''Primary materials'' are often exposed to the weather (protected membranes are an exception), and therefore also protect ''secondary materials'' from damage. Membranes, metal panels, asphalt shingles, and cedar shakes and shingles, form the core body of materials classified as ''primary''.
<li>''Secondary Material'' means one which forms part of a ''waterproofing system'' or ''water-shedding system'', and which may affect the wind resistance characteristics of the entire ''assembly'' but is not necessarily exposed to the weather.
</li></ol>
</li></ol>

===4.1.2. Reserved===
===4.1.3. Reserved===

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the ''manufacturer'' of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>{{hilite | validated with a packing slip, retained in their original packaging, or their packaging must be retained on site, and made available to the observer for verification and documentation || 2026-February-1 }},
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the roof surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''roof system'' shall conform to the ''manufacturer's'' published requirements, unless stated otherwise in this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to ASM Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to ASM Standard#A-5.1.3.1.| Note A-5.1.3.1.]])

<ol>
<li>A deck or wall overlay must be specified
<ol>
<li>when a thermal layer is required by the Building Code, or
<li>when the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li>''Uninsulated systems'' designed for a steel deck require a ''deck overlay'' to support the underlayment.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>Deck and wall overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>{{hilite | suitable for the type of ''deck'' || 2023-October-28 }}, and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
<li>When plywood is used as a deck overlay, only tongue-and-groove plywood is acceptable and must be
<ol>
<li>at least 12.7 mm (1/2”) thick when installed over a mass timber deck, or
<li>at least 15.88 mm (5/8”) thick, when the roof supports overburden.
</li></ol>
</li></ol>

====5.2.1.2. Thermal Barrier====

<ol>
<li>When the Code having jurisdiction requires a thermal barrier, any material selected from [[Division_C | Division C]] must be suitable for the purpose.
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU), or
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), conforming to ASTM C1325 (latest edition), "Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units".
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Panel Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.3.2. All Systems===
====5.3.2.1. Support, Arrangement, and Securement of Deck Overlays====

<ol>
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>''Deck'' overlays shall be affixed to the ''deck'' with
<ol>
<li>mechanical fasteners conforming to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]],
<li>polyurethane foam adhesives acceptable to the ''manufacturer'' and conforming to the requirements in [[#3.2.2.2. Adhesives | Article 3.2.2.2.]], or
<li>a combination of mechanical fasteners and polyurethane foam adhesives.
</li></ol>
<li>When mechanical fasteners are used to secure deck overlays, the minimum number of fasteners (in combination with plates) shall be four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel ''deck'' panels must be overlaid with a suitable substrate to provide a smooth, uniform surface for roofing.
<li>RoofStar-accepted ''deck'' overlay boards used as a thermal barrier to achieve a specific fire rating must conform to the applicable code and insurance requirements for the ''roof system''.
<li>When the ''roof system'' is uninsulated, the ''deck'' must be overlaid with at least one 12.7 mm (1/2”) thick layer of
<ol>
<li>moisture resistant gypsum core ''deck'' overlay board, or
<li>plywood.
</li></ol>
</li></ol>

====5.3.2.3. Overlays on Concrete Decks====

<ol>
<li>While metal panels must be separated from a concrete ''deck'' to prevent corrosion, a ''deck overlay'' is not mandatory, and separation may be made with an underlayment.
</li></ol>

====5.3.2.4. Overlays on Wood Decks====

<ol>
<li>A mechanically fastened overlay board is required for any ''deck'' structure that does not meet the ''deck'' fastening criteria set out in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]].
</li></ol>

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>''Wall'' overlay panels must be
<ol>
<li>mechanically fastened with screw fasteners spaced no more than 304.8 mm (12”) O.C., both vertically and horizontally; fasteners must align with structural supports, and shall be placed
<ol>
<li>at the perimeters,
<li>at the corners, and
<li>in the field, or
</li></ol>
<li>adhered with a polyurethane adhesive, applied with a continuous z-patterned ribbon spaced no less than 304.8 mm (12”) apart.
</li></ol>
</li></ol>
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to ASM Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to ASM Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. {{hilite | Additionally, the following terms are used in this Part || 2024-June-15 }}:
<ol>
<li>{{hilite | ''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material || 2024-June-15 }}.
<li>{{hilite | ''Continuity'' means a sealed, resistive, continuous connection || 2024-June-15 }}
<ol>
<li>{{hilite | between ''control layers'' that have the same function, and || 2024-June-15 }}
<li>{{hilite | between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration) || 2024-June-15 }}.
</li></ol>
<li>{{hilite | ''Control layer'' means a material used in a ''roof assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly || 2024-June-15 }}.
<li>{{hilite | ''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material || 2024-June-15 }}.
<li>{{hilite | ''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material, and is usually used in wall assemblies || 2024-June-15 }}.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible to specify
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''roof system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to ASM Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''roof system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity {{hilite | of Control Layers || 2024-June-15 }} {{strike| Between Building Enclosure Systems || 2023-June-15 }}====

<ol>
<li>The ''Design Authority'', and trades constructing walls and roofs, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between ''wall systems'' and ''roof systems''.
<li>{{hilite | Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor'' || 2024-June-15 }}.
<li>{{hilite | ''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials ({{hilite |some air ''control layers'' are considered vapour permeable, others vapour-impermeable || 2020-October-22 }}); ''roof systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>{{hilite | All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B, || 2024-June-15 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. High-humidity Building Interiors====

<ol>
<li>Careful consideration should be given to the performance characteristics of air and vapour ''control layers'' when specifying such a membrane for ''roof systems'' constructed over high-humidity building interiors, which may be susceptible to the accumulation of moisture within the ''roof system'' unless effective air and vapour controls are installed; these building interiors include (but are not limited to)
<ol>
<li>swimming pools,
<li>commercial laundry facilities,
<li>large aquariums, and
<li>paper mills.
</li></ol>
</li></ol>

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the roof or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to ASM Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a roof designed and built to qualify for a '''''RoofStar Guarantee''''' shall not include
<ol>
<li>polyethylene sheet plastic, or
<li>bitumen-impregnated kraft paper.
</li></ol>
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick {{hilite | self-adhering bituminous or butyl-based membrane || 2026-February-1 }} is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>{{hilite | Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard|| 2020-July-3 }}.
<li>{{hilite | A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited|| 2020-July-3 }}.
</li></ol>

====6.2.1.5. Vapour Controls for Concrete Decks====

<ol>
<li>Because curing concrete releases considerable moisture that can compromise the performance of a ''roof system'', a vapour ''control layer'' installed on new concrete ''decks'' (28 days or older) must be selected to prevent condensation inside the ''roof system''.
<li>A membrane with a permeability of 0.01 perms (Class I) is recommended for applications on concrete substrates, but the selection of vapour control materials is nevertheless the responsibility of the ''Design Authority''.
</li></ol>

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' in the ''roof system'' field, and at perimeters, are installed to provide at least 101.6 mm (4”) of overlap, for continuity of matching layers in adjacent assemblies,
<li>{{hilite | ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', || 2023-June-16 }} and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., walls), when a roof is replaced.
</li></ol>
<li>Installation of all air and vapour control materials must be {{hilite | smooth and uniform, without wrinkles or fish-mouths|| 2020-July-3 }}, and must {{hilite | also|| 2020-July-3 }} conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>{{hilite | When self-adhered membranes are applied directly to a steel supporting ''deck'',|| 2021-February-7 }}
<ol>
<li>{{hilite | membranes should be oriented parallel to the direction of ''deck'' flutes|| 2021-February-7 }}, and
<li>{{hilite | membrane laps and changes in plane must be supported by deck flutes, or by flat metal supports secured to the deck to span gaps|| 2021-February-7 }}.
</ol></li>
<li>When metal supports are used to span gaps between steel deck flutes, they must be
<ol>
<li>{{hilite | fabricated from pre-finished steel with a thickness no less than 24-gauge|| 2021-February-7 }}, and
<li>{{hilite | secured to the ''deck'' with no fewer than two (2) compatible screw fasteners per flute|| 2021-February-7 }} ({{hilite | See {{hilite | '''Figure 6.3.2.1.-A''' || 2026-February-1 }} and {{hilite | '''Figure 6.3.2.1.-B''' || 2026-February-1 }}|| 2021-February-7 }}).
</ol></li>
<li>{{hilite | ''Roof drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity'' || 2024-June-15 }}.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck With Metal Support''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck With Deck Overlay Panel''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }}
|-
| [[File:Figure 6.3.1-1.jpg | link=https://rpm.rcabc.org/images/5/54/Figure_6.3.1-1.jpg | 350 px]] || [[File:Figure 6.3.1-2.jpg | link=https://rpm.rcabc.org/images/d/d0/Figure_6.3.1-2.jpg | 350 px]]
|}

====6.3.2.2. Torch-applied Materials====

<ol>
<li>{{hilite | The application of materials to an unprotected combustible material, using a torch, is strictly prohibited|| 2020-July-3 }}.
<li>{{hilite | All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials|| 2020-July-3 }}
<ol>
<li>{{hilite | on ''decks'', ''walls'', blocking, and canted edges|| 2020-July-3 }}, and
<li>{{hilite | that are hidden or obscured within voids, cracks, or orifices|| 2020-July-3 }}.
</li></ol>
<li>{{hilite | When a torch-applied membrane is specified over combustible materials, all joints between overlay panels, and at roof-wall transitions, must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes|| 2020-July-3 }}.
<li>{{hilite | Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]|| 2020-July-3 }}.
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====
<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including {{hilite | heat from|| 2021-June-30 }} liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate and mineral wool. Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral wool insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to ASM Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements, with respect to
<ol>
<li>the use of a thermal barrier between the ''roof deck'' and the insulation ''system'', and
<li>the minimum required thermal resistance of the insulation ''system''.
</li></ol>
</li></ol>

====7.1.3.2. General Requirements====
(See [[Notes to ASM Standard#A-7.1.3.2. | Note A-7.1.3.2.]])

<ol>
<li>{{hilite | Selected board insulation products may be used within an architectural sheet metal panel ''roof systems'', provided the panels are listed in || 2023-June-16 }} [[Division_C | Division C]], {{hilite | and conform to the material specifications in || 2023-June-16 }} [[#Section 7.2. Materials | Section 7.2.]]
<li>{{hilite | Insulation may be used below the ''roof deck'' (not part of the ''roof assembly''), provided a ventilation space no less than 63.5 mm (2-1/2"), measured between the underside of the ''roof deck'' and the top face of insulation, is retained beneath the ''deck'' to keep it cool (Ref. the "British Columbia Building Code", Division B, || 2023-June-16 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.1., "Required venting"], and [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]).
<li>{{hilite | Spray foam insulation may not be used directly beneath a wood ''roof deck'' that supports an architectural sheet metal panel ''roof system'', unless the ''manufacturer'', and the '''''Guarantor''''', jointly agree in writing that moisture in the ''roof deck'' can be adequately vented out of the ''roof assembly''. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>{{hilite | Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee'''''), provided || 2023-June-16 }}
<ol>
<li>{{hilite | the ''Design Authority'' has specified its reuse, and || 2023-June-16 }}
<li>{{hilite | the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
(See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>Insulation ''assemblies'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See {{hilite | '''Figure 7.1.3.4.-A'''|| 2026-February-1 }}).
<li>{{hilite | At intersections with insulated curbs and walls, insulation joints at the roof-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See {{hilite | '''Figure 7.3.2.2.-A)'''|| 2026-February-1 }}. || 2023-June-16 }}
<li>{{hilite | ''Insulated systems'' || 2027-February-1 }}{{strike| that utilize metal panel clips shall specify clip attachment|| 2026-January-31 }} {{hilite | should utilize methods of panel clip attachment that minimize thermal bridging and the potential for condensation (See || 2027-February-1 }}[[Notes to ASM Standard#A-7.1.3.4.(4)| {{hilite | Note A-7.1.3.4.(4))|| 2026-February-1 }}]]{{hilite |, including the use of || 2027-February-1 }}
<ol>
<li>{{hilite | mechanically fastened bearing plates which are installed on the top surface of the insulation layers|| 2027-February-1 }}, {{strike| to thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or || 2026-January-31 }}
<li>{{hilite | metal girts placed in the top layer of insulation, secured to the deck with screws penetrating lower layers of insulation|| 2027-February-1 }}, or
<li>{{hilite | thermally non-conductive intermediate or continuous supports that pass through the insulation ''assembly''|| 2027-February-1 }}. {{strike| to mechanically fastened bearing plates which are installed on the top surface of the insulation.|| 2026-January-31 }}
</li></ol>
<li>{{hilite | Where spray foam is specified for use in the roof system, it shall conform to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2027-February-1 }}]] {{hilite |(Also, see Sentence (4), || 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.) || 2027-February-1 }}]].
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Insulated Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.4.1. Reuse of Insulation for Panel Replacement====

<ol>
<li>{{hilite | When a roof is specified for panel replacement only, the existing insulation may be left in place (Subject to the requirements in || 2023-June-16 }} [[#1.1.4.3. Partial Roof Replacement | Article 1.1.4.3.]]), {{hilite | but will be excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
</li></ol>

====7.1.4.2. Protection of Heat-sensitive Insulation====

<ol>
<li>When ''heat-sensitive insulation'' is used in the primary thermal ''assembly'', it must be covered with a ''heat-resistant insulation'' at least 50.8 mm (2”) thick (See [[Notes to ASM Standard#A-7.1.4.2. | Note A-7.1.4.2.]]).
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>The maximum width and length of insulation boards installed with mechanical fasteners is limited only by the ''manufacturer''.
<li>{{hilite | While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''roof system'' from a material handling perspective and consider specifying a thicker panel|| 2021-June-30 }}.
</li></ol>
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.2. Expanded Polystyrene Insulation====

<ol>
<li>Expanded polystyrene ("EPS") is ''heat-sensitive'' and shall conform to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.3. Polyisocyanurate Insulation====
(See [[Notes to ASM Standard#A-7.2.2.3. | Note A-7.2.2.3.]])

<ol>
<li>Polyisocyanurate insulation ("Polyiso") is ''heat-resistant'' and
<ol>
<li>shall conform to CAN/ULC-S704, "Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced", and to ASTM C-1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board",
<li>shall be manufactured with non-organic facers, and
<li>shall be labeled to identify the manufacturer and the date of manufacture.
</li></ol>
</li></ol>

====7.2.2.4. Mineral Fibre Insulation====

<ol>
<li>Mineral fibre insulation ("Mineral wool") is ''heat-resistant'' and shall conform to ASTM C726-17, "Standard Specification for Mineral Wool Roof Insulation Board".
</li></ol>

===={{hilite | 7.2.2.5. Spray Foam Insulation || 2027-February-1 }}====
<ol>
<li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2027-February-1 }}.
<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling minor gaps {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
<li>must be offset at least 304.8 mm (12"), both for adjacent layers and for adjacent row (a minus offset tolerance of 50.8 mm (2") maximum is permissible; see '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2026-February-1 }} {{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.3 Insulation Offset and Staggered.jpg|link=http://rpm.rcabc.org/images/2/28/7.3_Insulation_Offset_and_Staggered.jpg | 500 px]]
|}
 
<li>{{hilite | On exterior insulated walls, insulation joints at the roof-wall interface must be offset and staggered to eliminate thermal bridging|| 2022-February-5 }} ({{hilite | See {{hilite | '''Figure 7.3.2.2.-B''' || 2026-February-1 }}|| 2022-February-5 }}).
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.3.2.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-B (ASM).jpg| link=https://rpm.rcabc.org/images/7/7e/Figure_7.3.2.-B_%28ASM%29.jpg | 500 px]]
|}
 
<li>{{hilite | Where penetrations pass through an insulation system, or where thermally non-conductive intermediate or continuous supports for clips are used, any minor voids less than 25.4 mm (1”) around them must be insulated with a spray foam conforming to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5.|| 2027-February-1 }}]]{{hilite |, to reduce the potential for condensation || 2027-February-1 }}.
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''roof assembly'', calculated to resist the ''Specified Wind Loads'' for the ''roof system''.
<li>{{hilite | When thermally non-conductive clips or bars are utilized on a ''low slope'' roof to retain insulation and support panel clips, they must be embedded in, and fastened through, a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7.]])|| 2021-June-30 }}.
</li></ol>

====7.3.2.4. Protection of Heat-sensitive Insulation====

<ol>
<li>{{hilite | Heat-sensitive insulation must be protected from high temperatures, both during construction and when placed in service, and therefore it must be overlaid with heat-resistant insulation no less than 50.8 mm (2") thick || 2023-June-16 }} (See [[#7.1.4.2. Protection of Heat-sensitive Insulation | Article 7.1.4.2.]]).
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Eave, Valley, and Field Underlayment=
==Section 8.1. Design==

===8.1.1. General===
====8.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====8.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Eave and Valley Protection'' means a self-adhering sheet membrane applied in valleys and in parallel courses {{hilite | on the roof ''deck''|| 2021-June-30 }} along the eaves, up the roof slope to a point measured vertically from the inside of the exterior wall, and intended to block the ingress of water that may leak behind shingles or metal roof panels as the result of snow or ice buildup on the roof surface.
<li>{{hilite | ''Separation Layer'' (sometimes referred to as a "slip sheet") means a roll material installed directly below metal roof panels to|| 2021-June-30 }}
<ol>
<li>{{hilite | inhibit bonding of the metal panels to underlying materials, such as bitumen-based underlayments or ''eave protection'' membranes, or|| 2021-June-30}}
<li>{{hilite | permit the passage of vapour out of the roof system|| 2021-June-30 }} ({{hilite | A ''separation layer'' by itself does not function as a ''ventilation layer''|| 2021-June-30 }}).
</li></ol>
<li>''Underlayment'' means a sheet (rolled) material that is either self-adhering or mechanically fastened (typically with large head nails), and which is installed
<ol>
<li>{{hilite | immediately over the supporting ''deck'' or ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | to provide secondary protection between the ''water-shedding system'' materials and the building interior|| 2021-June-30 }}, and
<li>{{hilite | to keep ''water-shedding system'' materials from adhering to the ''deck''.|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | ''Ventilation Layer''|| 2021-June-30 }} means a layer of roll material, usually comprised of stiff, synthetic entangled mesh, installed directly beneath the metal panels in place of, or in addition to, a ''separation layer''; it forms a ventilation space intended to
<ol>
<li>facilitate the {{hilite | drying|| 2021-June-30 }} of condensation that collects on the bottom surface of metal roof panels, and
<li>inhibit bonding of metal roof panels with underlying materials.
</li></ol>
</li></ol>
</li></ol>

===8.1.2. Guarantee Term Requirements===
====8.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.1.3. All Systems===
====8.1.3.1. Eave Protection====

<ol>
<li>{{hilite | Sheet membrane ''eave protection'' is required on all ''Common Slope'', ''Steep Slope'', and ''Extreme Slope'' roofs, but is not required || 2023-June-16 }}
<ol>
<li>{{hilite | over unheated spaces, and || 2023-June-16 }}
<li>{{hilite | where the roof overhang exceeds 914.4 mm (36") measured along the roof slope from the edge of the roof to the inner face of the exterior ''wall''. || 2023-June-16 }}
</li></ol>
<li>{{hilite |Sheet membrane ''eave protection''|| 2021-June-30 }}
<ol>
<li>must conform to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<li>{{hilite | must be installed on the ''supporting deck'' or on a ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | may also serve as an air barrier or vapour retarder, or as both, when installed in combination with an ''underlayment'' sharing the same performance characteristics|| 2021-June-30 }},
<li>{{hilite | must be at least 1 mm thick when the roof slope exceeds 1:6 (2” in 12”)|| 2021-June-30 }},
<li>{{hilite | shall be at least 3 mm thick when the roof slope is less than 1:6 (2” in 12”)|| 2021-June-30 }}. and
<li>must be carried
<ol>
<li>a minimum of 609.6 mm (24") up inside interior walls (914.4 mm (36") in heavy snow load conditions, and
<li>down the vertical face of the eave and rake edges by at least 50.8 mm (2").
</li></ol>
</li></ol>
</li></ol>

====8.1.3.2. Valley Protection====

<ol>
<li>Valley Protection is required on all ''projects'', shall conform to the requirements for eave protection in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]], and shall be specified to cover the entire valley, even where eave protection is exempt.
</li></ol>

====8.1.3.3. Field Underlayment====

<ol>
<li>''Underlayments'' are required on all Architectural Sheet Metal Panel Systems, and
<ol>
<li>must be self-adhering when the roof slope is equal to or greater than 1:6 (2" in 12") but is less than 1:3 (4" in 12"), and
<li>may be nail-applied or self-adhered when the roof slope is 1:3 (4" in 12") or greater.
</li></ol>
<li>{{hilite | Self-adhered membranes specified for ''low slope'' roofs (slopes less than 1:3 (4" in 12")) must || 2023-June-16 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2023-June-16 }} [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]{{hilite | , and || 2023-June-16 }}
<li>{{hilite | achieve a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")) || 2023-June-16 }}
</li></ol>
<li>{{hilite |Multiple layers of self-adhering ''eave protection'' membrane may be specified to achieve the minimum thickness requirement in this Article, but|| 2021-June-30 }}
<ol>
<li>{{hilite |each layer must be at least 1.4 mm thick,|| 2021-June-30 }} and
<li>{{hilite |layering must be permitted by the '''''Guarantor''''' through a written Variance (Ref. [[#1.1.3.6. Variances | Article 1.1.3.6.]])|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Underlayments for roofs in high snow load conditions are governed by the requirements in || 2026-February-1 }} [[#9.1.3.3. Panel Seams | {{hilite | Article 9.1.3.5. || 2026-February-1 }}]].
</li></ol>

====8.1.3.4. Separation Layer Between Materials====

<ol>
<li>A separation layer {{strike| material || 2026-January-28 }} is required
<ol>
<li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or
<li>{{hilite |when soldering is to be done|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), a|| 2027-February-1 }} {{hilite |vapour-permeable ''separation layer'' {{hilite | conforming to the requirements in [[#8.2.1.4. Separation Materials | Article 8.2.1.4.]]|| 2027-February-1 }} is required between metal panels and insulation.|| 2021-June-30 }}
<li>{{hilite | Self-adhered underlayments that are impermeable, that are used in an uninsulated ''roof assembly'' and which are manufactured with a non-bonding top facer, do not require an additional separation layer|| 2027-February-1 }}.
</li></ol>

====8.1.3.5. Ventilation Beneath Panels====
{{hilite | (See [[Notes to ASM Standard#A-8.1.3.5. | Note A-8.1.3.5.]]. || 2024-January-31 }} {{hilite | Also see [[#8.3.2.6. Ventilation Materials | Article 8.3.2.6.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] for installation requirements) || 2027-February-1 }}

<ol>
<li>{{hilite | A ''ventilation'' {{hilite | (drying) || 2027-February-1 }} ''space'' beneath metal roof panels|| 2021-October-30 }}
<ol>
<li>{{hilite | is required on slopes less than 1:3 (4” in 12”)|| 2021-October-30 }},
<li>is required beneath curved panel ''systems'', and
<li>{{hilite | is recommended when the roof slope exceeds 1:3 (4” in 12”)|| 2021-June-30 }}.
</li></ol>
<li>{{strike| {{hilite | Ventilation beneath panels shall be incorporated into the ''roof system'' design|| 2021-October-30 }} || 2026-January-27 }}{{hilite | A ''ventilation'' (drying) ''space'' beneath panels shall conform to the installation requirements in this Standard and shall be achieved by || 2027-February-1 }}
<ol>
<li>{{hilite | {{strike| by || 2026-January-27 }} supporting the metal panels with entangled mesh {{hilite | conforming to the material requirements in [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]|| 2027-February-1 }}{{strike| that is at least 6.35 mm (1/4”) thick, and by securing the panels using standard panel clips supported on EPDM pads equal in thickness to the entangled mesh (Ref. [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])|| 2021-October-30 }}|| 2026-January-27 }}, or
<li>{{hilite | {{strike| by || 2026-January-27 }} elevating unsupported metal panels above the underlying substrate materials by at least 9.53 mm (3/8”), {{hilite | provided the panels satisfy the requirements in Article 1.1.3.1., Sentence (2)|| 2027-February-1 }}. {{strike| and securing the panels with tall panel clips; this approach does not require EPDM pads and entangled mesh, and is acceptable provided {{strike| the ''Design Authority'' supplies the '''''Guarantor''''' with written engineering certification that || 2023-January-26 }}|| 2021-October-30 }} || 2026-January-27 }}
{{strike| <ol>
<li>{{hilite | the ''Contractor'' provides the '''''Guarantor''''' with written assurance concerning the load-bearing capacity of the panel system (Ref. || 2024-January-31 }} [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], "Submittals"),
<li>{{hilite | clips are fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | bearing plates (when used) are embedded in an acceptable sealant, to prevent water ingress around the screws. || 2024-January-31 }}
</li></ol>
</li></ol>
<li>{{hilite | When tall clips are used as an alternative to EPDM pads, the clips shall be fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | but when bearing plates are used without EPDM pads and support tall clips, the bearing plates shall also be embedded in sealant, to prevent water ingress around the screws. || 2024-January-31 }}

{{strike| <li>{{hilite | the clips will adequately secure and support the elevated panels|| 2021-October-30 }}.
<li>{{hilite | the panels are suitable as spanning members and will support anticipated live loads, including loads during construction|| 2021-October-30 }}. || 2023-January-26 }} || 2026-January-27 }}
</li></ol>
</li></ol>

==Section 8.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===8.2.1. Material Properties===
====8.2.1.1. Suitability of Materials====

<ol>
<li>{{hilite | All materials specified for use in a ''roof system'' must be expressly manufactured for use in a roof and must be listed in Division C (Ref. || 2024-June-15 }} [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.).]]
<li>{{hilite | Materials used for ''eave or valley protection'', as an ''underlayment'', or as a ''separation layer'', must not damage the painted finish of roof panels (a scratched or marred finish may result in panel corrosion)|| 2020-July-3 }}.
<li>{{hilite | When a material not listed in [[Division_C | Division C]] is specified for application in an Architectural Sheet Metal Roof System, the ''Design Authority'' must request a written Variance from the '''''Guarantor'''''|| 2020-July-3 }}.
<li>{{hilite | The ''Design Authority'' must select the most suitable material for eave protection, a separation layer, or as an underlayment, based on || 2024-June-22 }}
<ol>
<li>{{hilite | where the material will be located within the roof assembly, || 2024-June-15 }}
<li>{{hilite | the anticipated service temperature for the material, and || 2024-June-15 }}
<li>{{hilite | the material's published service temperature rating (see || 2024-June-15 }} [[Notes to ASM Standard#A-8.2.1.1.(3) | Note A-8.2.1.1.(3)]]).
</li></ol>
<li>All membranes must be supplied with proprietary sealants, mastics, tapes, and primers, each one suitable for the application of the ''underlayment''.
</li></ol>

====8.2.1.2. Eave and Valley Protection====

<ol>
<li>{{hilite |{{hilite | Bituminous || 2026-February-1 }} sheet membranes used for ''eave and valley protection'' must|| 2021-June-30 }}
<ol>
<li>{{hilite | conform to the requirements in CSA-A123.22, "Self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection," || 2023-June-16 }}
<li>{{hilite | be made of bitumen with a high softening point and a minimum flow temperature of 87.7°C (190°F) when they are used immediately below any metal panels or flashing (Ref. ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material"), || 2023-June-16 }}
<li>be self-adhering, and
<li>{{hilite | have a sanded or synthetic, non-bonding top surface|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Butyl-based sheet membranes used for eave and valley protection shall || 2026-February-1 }}
<ol>
<li>{{hilite | be self-adhering and || 2026-February-1 }}
<li>{{hilite | have a synthetic, non-bonding top surface|| 2026-February-1 }}.
</li></ol>
</li></ol>

====8.2.1.3. Underlayment====

<ol>
<li>{{hilite | Mechanically attached polymeric ("synthetic") fabric underlayments shall conform to the criteria in || 2023-June-16 }} [http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf RGC ACWS-PUL, "RGC Acceptance Criteria for Mechanically Attached Polymeric Roof Underlayments Used in Water-shedding Systems"].
<li>{{hilite | {{hilite | Self-adhering modified bituminous or butyl-based || 2026-February-1 }} sheet membrane underlayments must conform to the requirements in [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]] {{hilite | and || 2024-January-31 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]|| 2022-June-17 }}
</li></ol>
</li></ol>

====8.2.1.4. Separation Layer====

<ol>
<li>{{hilite | Separation layer materials || 2027-February-1 }}
<ol>
<li>{{hilite | must be manufactured as rolled goods and shall resist bonding with the underside of metal panels, and || 2027-February-1 }}
<li>{{hilite | may be self-adhered or loose laid || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Breathable separation layers shall be manufactured to allow the passage of water vapour through the material and therefore shall have a minimum permeability rating of 5 perms, tested and validated using ASTM E96/E96M-22a, "Standard Test Method for Gravimetric Determination of Water Vapour Transmission Rate of Materials" (products with a US permeability rating less than 5 perms are considered impermeable and therefore unsuitable as separation materials in insulated roof systems) || 2027-February-1 }}.
<li>{{hilite | Entangled mesh || 2023-June-16 }} (See [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]), {{hilite | which is commonly used for ventilation immediately beneath metal panels, may also serve as a separation (bond-breaking) material. || 2023-June-16 }}
</li></ol>

====8.2.1.5. Ventilation Materials====

<ol>
<li>{{hilite | Entangled mesh used in a ventilation cavity must {{strike| be || 2025-February-1 }}|| 2021-October-30 }}
<ol>
<li>{{hilite | be manufactured from polymeric filaments that fuse where they intersect|| 2026-February-1 }},
<li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
<li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.
</li></ol>

====8.2.1.6. Fasteners====

<ol>
<li>Mechanical fasteners used to secure nail-applied underlayments must conform to the underlayment manufacturer’s requirements.
<li>Staples are not permitted.
</li></ol>

==Section 8.3. Application==
===8.3.1. Guarantee Term Requirements===
====8.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.3.2. All Systems===
====8.3.2.1. Installation of Eave Protection====

<ol>
<li>{{hilite | Where ''eave protection'' is required, it must || 2023-June-22 }}
<ol>
<li>{{hilite | overhang the fascia by at least 25.4 mm (1”), || 2023-June-22 }}
<li>{{hilite | extend up the slope at least 914.4 mm (36"), or to a line not less than 609.6 mm (24") inside the inner face of the exterior wall || 2023-June-22 }} (914.4 mm (36") in regions with heavy snow; see {{hilite | '''Figure 8.3.2.1.-A''' || 2026-February-1 }}), and
<li>{{hilite | extend up all abutments (walls, skylights, etc.) at least 152.4 mm (6″) above the surface of the ''finished system surface''. || 2023-June-22 }}
</li></ol>
<li>{{hilite | Horizontal runs of ''eave protection'' must be positively lapped at least 50.8 mm (2″) and end laps (vertical joints) must be at least 152.4 mm (6″). || 2023-June-22 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 8.3.2.1.-A Eave Protection Requirements''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 8.3.2.1.(1) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File: Figure 8.3.2.-A (ASM).jpg | link=https://rpm.rcabc.org/images/1/17/Figure_8.3.2.-A_%28ASM%29.jpg | 500 px]]
|}

====8.3.2.2. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membranes must|| 2021-June-30 }}
<ol>
<li>{{hilite | be the same materials used for ''eave protection'', conforming to the requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],|| 2021-June-30 }},
<li>{{hilite | be centred on,|| 2021-June-30 }} and installed parallel to, the valley line, extending from the eave edge past the upper end of the valley metal flashing, at least 50.8 mm (2”),
<li>{{hilite | be at least 990.6 mm (39”) wide and centred on the valley|| 2021-June-30 }},
<li>positively overlap lower runs of valley membrane by no less than 152.4 mm (6”), rolled to ensure even, full adhesion, and
<li>{{hilite | positively lap and seal to the ''eave protection'' membrane|| 2021-June-30 }}.
</li></ol>
</li></ol>

====8.3.2.3. Underlayment for Common and Steep Slopes====

<ol>
<li>All nail-applied polymeric ("synthetic") ''underlayments'' installed on slopes less than 2:3 (8” in 12”)
<ol>
<li>shall be installed using fasteners acceptable to the manufacturer of the ''underlayment'',
<li>shall be secured to conform to the ''underlayment'' manufacturer's published instructions,
<li>must run parallel to the eave,
<li>shall positively overlap adjacent material by
<ol>
<li>at least 76.2 mm (3″) along the sides, unless exceeded by the ''manufacturer’s'' instructions, and
<li>at least 152.4 mm (6″) at the ends, unless exceeded by the ''manufacturer’s'' instructions,
</li></ol>
<li>must run beneath all ''water-shedding system'' materials, irrespective of slope,
<li>must extend beneath all perimeter ''linear metal flashing'',
<li>shall cover the roof deck beneath all penetration flashings, and
<li>must be carried up vertical surfaces at least 152.4 mm (6”) above the ''roof deck'', where roofing materials and flashings adjoin walls or curbs.
</li></ol>
<li>"Negative" laps that are unavoidable in horizontally applied courses of ''underlayment'' are permissible, but only when
<ol>
<li>the ''underlayment'' is a self-adhering membrane (Ref. [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]),
<li>the membrane runs overlap at least 152.4 mm (6"), and
<li>lapped seams are roller-pressed and sealed with a compatible sealant along the seam edge.
</li></ol>
<li>Installing nail-applied polymeric ("synthetic"), self-adhered bituminous, or butyl ''underlayments'' perpendicular to the eave is permissible but the laps must be self-sealing or must be sealed with a suitable lap cement provided by the underlay manufacturer.
<li>When an ''underlayment'' is installed perpendicular to the eave and the roof slope exceeds 2:3 (8” in 12”), the ''underlayment''
<ol>
<li>shall be self-adhering,
<li>must extend beyond the furthermost edge of the flashing at least 101.6 mm (4"), and
<li>shall positively laps beneath other vertical membranes.
</li></ol>
</li></ol>
</li></ol>

====8.3.2.4. Underlayment for Slopes Less Than 1:3====

<ol>
<li>All roofs sloped less than 1:3 (4" in 12") must be covered with one or more layers of self-adhered or thermally fused ''underlayment'' membrane,
<ol>
<li>conforming to the material requirements in [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>achieving a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")), and
<li>installed to conform to the requirements in [[#8.3.2.4. Underlayment for Slopes Less Than 1:3 | Article 8.3.2.4.]]
</li></ol>
<li>{{hilite |Applying multiple layers of self-adhering ''eave protection'' membrane to achieve the minimum thickness requirement is permissible, provided|| 2021-June-30 }}
<ol>
<li>layering is acceptable to the underlayment manufacturer,
<li>{{hilite |the second layer is offset from the first by at least 304.8 mm (12"), both horizontally and vertically,|| 2021-June-30 }} and
<li>{{hilite | the ''Design Authority'' has obtained a written Variance from the '''''Guarantor''''' permitting multiple layers. || 2023-June-16 }}
</li></ol>
</li></ol>

====8.3.2.5. Separation Materials====

<ol>
<li>Horizontal runs of separation materials must be positively lapped at least 50.8 mm (2"), and vertical end joints must be lapped at least 152.4 mm (6").
</li></ol>

====8.3.2.6. Ventilation Materials====

<ol>
<li>{{strike| ''Roof systems'' that require a ventilation space shall conform to the design specifications and required in [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]] || 2026-January-27 }}{{hilite | Ventilation materials shall be installed to conform to [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] || 2027-February-1 }}
</li></ol>

<hr>
<div id=PART_9></div>

=Part 9 - Roof Field (Panel Systems)=

==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary roof covering, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed using only RoofStar-accepted panels (or panels manufactured with a RoofStar-accepted roll forming machine) secured with a hidden clip system; flange-fastened panels may not be specified or installed.
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====
(See [[Notes to ASM Standard#A-9.1.3.1.| Note A-9.1.3.1.]])

<ol>
<li>Shop drawings for each ''project'' detail, which may be drawn by the ''Contractor'', must be reviewed by the Accepted observer and returned to the ''Guarantor'', verifying conformity to the '''''RoofStar Guarantee Standards''''' prior to the start of construction.
<li>Each construction detail must be reviewed during a field review and documented in the observer's RGC field review report, to verify conformity to the '''''RoofStar Guarantee Standards'''''.
<li>A system designed with a slope less than 1:6 (2" in 12") must conform to the limitations and conditions in [[#2.1.3. All Systems | Subsection 2.1.3.]]

<li>{{hilite | Metal panel seam types must conform to the following permissible applications and length limitations, to '''Table 9.1.3.3.-A''', and to any other seam requirements in this Part, to qualify for a '''''RoofStar Guarantee'''''|| 2027-June-11 }}:
<ol>
<li>{{hilite | Mechanically locked standing seams utilizing concealed clips ('''Figure 9.1.3.1.-A''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used on roof slopes 1:6 (2” in 12”) or greater (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies || 2027-June-22 }},
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]]|| 2027-June-11 }},
<li>{{hilite | may be permitted for slopes less than 1:6, but this is subject to a Variance review (See Variance requirements in [[#2.1.3. All Systems | Subsection 2.1.3.]])|| 2027-June-11 }},
<li>{{hilite | shall be seamed with butyl when the primary slope is 1:4 (3” in 12”) or less (See '''Table 9.1.3.3.-A'''; also see [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]] and '''Figure 9.3.2.4.-A''') and|| 2027-June-11 }}
<li>{{hilite | are the only seams permitted in locations with high snow loads (for more about high snow load conditions, see [[#9.1.3.5. Roofs in High Snow Load Conditions | Article 9.1.3.5.]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams utilizing concealed clips ('''Figure 9.1.3.1.-B''') || 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-cap seams utilizing concealed clips ('''Figure 9.1.3.1.-C''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams on flange-fastened panels ('''Figure 9.1.3.1.-D''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be installed only in uninsulated assemblies|| 2027-June-11 }},
<li>{{hilite | are permissible only on roof slopes greater than 1:3 (4" in 12"), and|| 2027-June-11 }}
<li>{{hilite | are limited to a maximum length of 9144 mm (30’)|| 2027-June-11 }}.
</li></ol>
<li>The ''Design Authority'' must calculate the maximum panel length based on
<ol>
<li>the material type,
<li>the direction of expansion and contraction that is determined by the location of drag load fasteners, and
<li>the amount of expansion and contraction provided by
<ol>
<li>the fastener slot on the fastening flange, or
<li>the concealed expansion clip slot.
</li></ol>
</li></ol>
<li>Panels must be able to withstand loads as required in [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>Panels must be solidly supported (See '''Figure 9.1.3.1.-A''' (1 and 2)), unless
<ol>
<li>the panel is made to be self-supporting (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]; also see [[#9.2.1.1. Panel Grade, Gauge, and Fabrication | Sentence 9.2.1.1.(9)]]), or
<li>a ventilation space is required and the panels are suitably supported with entangled mesh (See [[#8.1.3.5. Ventilation Beneath Panels
| Article 8.1.3.5.]]; also see '''Figures 9.3.2.5-A''' through '''F''' in [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration) || colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]] || [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|-
|}

====9.1.3.2. System Securement====

<ol>
<li>{{hilite | Panel shape and securement must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]).
<li>Metal panels must be pinned to the structure with fasteners, to prevent slippage down the roof because of the weight of the ''roof system'' ("drag loads").
</li></ol>

====9.1.3.3. Panel Seams====

<ol>
<li>Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}.
</li></ol>
 
::::::::::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights''' || 2026-February-1 }} {{hilite | Forming Part of Article 9.1.3.3. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! {{hilite | Conditions || 2026-February-1 }} (see also Part 2) !! Seam Height Minimums !! Permissible Seam Types
|-
| 1:3 (4" in 12") or greater || 25.4 mm (1") || All
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 1:6 (2" in 12") to (less than) 1:3 (4" in 12") || 38.1 mm ( 1-1/2”) || Mechanical Lock only (single or double)
|-
| 41.28 mm ( 1-5/8”) || Snap Lock (male seam)
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender) || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || Mechanical Lock only (single or double)
|-
| 50.8 mm (2”) || Mechanical Lock only (double)
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | Power-curved panels (reviewed by RGC prior to tender) || 38.1 mm (1-1/2”) + butyl sealant in seam || Mechanical Lock only (single or double)
|-
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | {{hilite | Locations with High Snow Loads (defined in Article 1.1.3.3.) || 2026-February-1 }} || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || {{hilite | Mechanical Lock only (double) || 2026-February-1 }}
|}

====9.1.3.4. Curved Panel Systems====
(See [[#9.3.2.8. Curved Panels | Article 9.3.2.8.]])

<ol>
<li>Curved panel systems
<ol>
<li>are permissible, but because a curved system diminishes in slope to a zenith of 0°, the design must be submitted to the '''''Guarantor''''' prior to tender (See [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>may be specified with a minimum seam height of 38.1 mm (1-1/2") (subject to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>must continuously cover a curved substrate; segmented panels are not permissible, and
<li>must incorporate a ventilation space (see [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]).
</li></ol>
<li>{{hilite | Stiffeners are optional for curved panels, and when they are desired, the ''Design Authority'' should consult with the ''Contractor'' about stiffener profiles that can be power-curved. || 2023-June-16 }}
</li></ol>

===={{hilite | 9.1.3.5. Roofs in High Snow Load Conditions || 2026-February-1 }}====
<ol>
<li>Roofs subject to high snow loads ([[#1.1.3.3. Snow Loads | Article 1.1.3.3.]]) require
<ol>
<li>full support for metal panels,
<li>a self-adhered underlayment conforming to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] and [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>metal panels seams
<ol>
<li>with a height no less than 50.8 mm (2”) (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>that are double-locked, and
<li>sealed with butyl (See [[#9.3.2.4. Panel Securement and Seam | Sentence 9.3.2.4.(7)]]),
</li></ol>
<li>valleys conforming to [[#10.1.5.3. Valleys for Heavy Snow Load | Article 10.1.5.3.]], and
<li>placement of penetrations near the ridge line of the roof.
</li></ol>
<li>Insulated (above the roof deck; see [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]]) architectural sheet metal roofs must be designed to conform to the requirements in Sentence (1) and shall be designed with slopes equal to or greater than 1:1.5 (8” in 12”) and must permit the free discharge of snow from the roof, except where life safety is concerned.
<li>A roof with slopes less than 1:1.5 (8” in 12”) shall conform to the requirements in Sentence (1) and must be designed as a vented (cold) roof in which
<ol>
<li>the vented space above the insulation assembly shall be determined by a Building Envelope Consultant but shall not be less than 76.2 mm (3”)
<li>the supporting deck for the metal panel system is plywood with a minimum thickness of 19.05 mm (3/4”) (thickness is subject to the engineering requirements in Sentence (2)),
<li>the underlayment is self-adhering and possesses a minimum thickness of
<ol>
<li>1.0 mm when it is butyl-based,
<li>1.5 mm when it is bituminous, or
<li>3.0 mm when the slope is less than 1:6 (2” in 12”) (See [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]]), and
</li></ol>
<li>entangled mesh and EPDM pads are capable of supporting the anticipated loads from snow and other service conditions, without deformation (See [[#8.2.1.5. Ventilation Materials | Articles 8.2.1.5.]] and [[#9.2.1.6. EPDM Pads | Article 9.2.1.6.]]).
</li></ol>
</li></ol>

===9.1.4. Insulated Systems===
====9.1.4.1. General Requirements====

<ol>
<li>{{hilite | Insulated ''Architectural Sheet Metal Roof Systems'' || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-22 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]),
<li>{{hilite | shall conform to all other requirements in this Standard, || 2023-June-16 }} and
<li>{{hilite | shall minimize or eliminate thermal bridging, using thermally non-conductive clips or bars, or by using mechanically fastened bearing plates || 2023-June-16 }} (see [[#Part 7 - Insulation | Part 7, "Insulation"]]).
</li></ol>
</li></ol>

===9.1.5. Uninsulated Systems===
====9.1.5.1. General Requirements====

<ol>
<li>{{hilite | Uninsulated Architectural Sheet Metal Roof Systems || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]), and
<li>{{hilite | shall conform to all other requirements in this Standard. || 2023-June-16 }}
</li></ol>
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===9.2.1. Material Properties===
====9.2.1.1. Panel Grade, Gauge, and {{strike| Selection || 2025-February-1 }} {{hilite | Fabrication || 2026-February-1 }}====

<ol>
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06, CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06, ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
<li>'''Aluminum-Zinc alloy-coated steel''': 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06, CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>{{hilite | All panels must be factory-manufactured, or site-fabricated by an accepted ''Contractor'', and listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Metal panels must be fabricated to fully span the distance from eave to ridge, unless interrupted by ''curbs'', ''walls'', or penetrations || 2026-February-1 }}.
<li>{{hilite | Notwithstanding Sentence (4), curved metal panels, including metal panels over barrel-shaped structures (See|| 2026-February-1 }} [[#2.1.3.1. General Requirements for Roof Slope | {{hilite | Sentence 2.1.3.1.(3)|| 2026-February-1 }}]] {{hilite | concerning pre-tender reviews by the '''''Guarantor'''''), may be manufactured in segments when || 2026-February-1 }}
<ol>
<li>{{hilite | panel lengths are too long to be practicable (for example, on a barreled roof), or|| 2026-February-1 }}
<li>{{hilite | the panel material’s coefficient of thermal expansion will induce movement that exceeds the capacity of panel clips (See also|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) | {{hilite | Note A-9.2.1.1.(5)(2))|| 2026-February-1 }}]],
{{hilite | but this is permissible only when|| 2026-February-1 }}
<ol>
<li>{{hilite | the ''Design Authority'' requests a written Variance from the '''''Guarantor''''' prior to tendering the project|| 2026-February-1 }},
<li>{{hilite | the roof slope at the point of division is not less than 1:2 (6” in 12”) (See '''Figure 9.2.1.1.-A'''; also see|| 2026-February-1 }} [[Notes to ASM Standard#Note A-9.2.1.1.(5)(4) | {{hilite | Note A-9.2.1.1.(5)(4)|| 2026-February-1 }}]]{{hilite | ), || 2026-February-1 }}
<li>{{hilite | the transition flashing between panel segments has a slope of at least 1:3 (4” in 12”) (See '''Figure 9.2.1.1.-B'''), and || 2026-February-1 }}
<li>{{hilite | the ''Contractor'' has submitted to the '''''Guarantor''''' the engineered shop drawings showing the detailing of the division of metal panels, as part of the request for a written Variance|| 2026-February-1 }}.
</li></ol>
</li></ol>
<li>Sheet steel, copper and zinc roof panels may be roll-formed to a maximum width of 500 mm (20”).
<li>All metal roof panels over 304.8 mm (12”) in width must be roll-formed or factory-fabricated with stiffening ribs or striations.
<li>Panels fabricated with perforated fastening holes or slots must not exceed 9144 mm (30’) in length.
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath the panels that are not supported by a ''ventilation layer'', and tall clips are used to support the raised panels, the panels must be engineered to support anticipated live loads without permanent deformation (Ref. [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-A Segmented Curved Metal Panels Showing Transition Flashing''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-B Minimum Slope Requirements for Segmenting Curved Metal Panels''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 9.2.1.1.-A.png | link=https://rpm.rcabc.org/images/e/ef/ASM_Figure_9.2.1.1.-A.png | 450 px]] || [[File:ASM Figure 9.2.1.1.-B.png | link=https://rpm.rcabc.org/images/c/ca/ASM_Figure_9.2.1.1.-B.png | 450 px]]
|}

====9.2.1.2. Roll Forming Machines and Mill Certificate====

<ol>
<li>All machines used by a ''Contractor'' to fabricate metal panels shall be owned by a ''Contractor'', and shall be accepted by the '''''Guarantor'''''.
<li>Site-forming metal panel machines
<ol>
<li>must be certified annually by a third-party engineer,
<li>must be serviceable, maintained and calibrated with supporting documentation, and
<li>records documenting the serviceable condition of the machine must be submitted annually to the '''''Guarantor'''''.
</ol></li>
<li>''Contractors'' who own metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.
<li>the ''Contractor'' must provide a mill certification for all metal roofing ''projects'' installed under the '''''RoofStar Guarantee Program'''''.
<li>Mill certificates must confirm that the sheet metal used for forming metal panels and ''linear metal flashings'' conform to or exceeds the requirements in [[#9.2.1.1. Panel Grade, Gauge, and Selection | Article 9.2.1.1.]]
</ol></li>

====9.2.1.3.{{hilite | Pre-painted Finishes|| 2022-February-5 }}====

<ol>
<li>{{hilite | When a painted finish on G90 galvanized or AL-Zn alloy coated steel panels is specified, SMP pre-painted finishes are permissible but|| 2022-February-5 }} {{hilite | PVDF (polyvinylidene fluoride, also referred to as PVF2) is strongly recommended for durability and resilience|| 2022-February-5 }}.
</li></ol>

====9.2.1.4.{{hilite | Fasteners|| 2022-February-5 }}====
(See also [[#3.2.2.1. Fasteners | Article 3.2.2.1.]])

<ol>
<li>Fasteners used to secure metal panels or clips must be
<ol>
<li>specified by the ''Design Authority'',
<li>compatible with the material they contact,
<li>appropriately sized, in both length and thread type, for the material to which they will be secured, and
<li>corrosion-resistant screws with a low-profile head.
</li></ol>
</li></ol>

====9.2.1.5.{{hilite | Clips {{hilite | and Bearing Plates || 2025-January-31 }}|| 2022-February-5 }}====
(See [[Notes to ASM Standard#A-9.2.1.5.| Note A-9.2.1.5.]])

<ol>
<li>Clips must be
<ol>
<li>{{strike| proprietary (not shop fabricated) || 2024-February-1 }} {{hilite | engineered || 2025-January-31 }} and must be acceptable to the roll form machine manufacturer, for use with Architectural Sheet Metal Roof Systems, and
<li>compatible with the metal panel and other materials they contact.
</li></ol>
<li>Attachment clips for Architectural Sheet Metal Roof Systems shall be manufactured with evenly spaced indents or guide holes for fastener placement, and {{strike| must || 2024-February-1 }} {{hilite | may || 2025-January-31 }} be formed from
<ol>
<li>Steel (Z275 or G90)(AZ50 or AZM150),
<li>Aluminum, or
<li>Stainless Steel.
</li></ol>
<li>{{hilite | Bearing plates shall be || 2025-January-31 }}
<ol>
<li>{{hilite | sufficiently rigid to resist distortion in service, and || 2025-January-31 }}
<li>{{hilite | engineered and suitable to support all expected loads, including compression loads || 2025-January-31 }}.
</li></ol>
</li></ol>

===={{hilite | 9.2.1.6. {{strike| Bearing Plates and || 2024-February-1 }} EPDM Pads || 2025-January-31 }}====

<ol>
{{strike| <li>{{hilite | Bearing plates shall be || 2023-June-16 }}
<ol>
<li>{{hilite | manufactured from corrosion-resistant steel, || 2023-June-16 }}
<li>{{hilite | of sufficient gauge to resist distortion under load, conforming to the engineered shop drawings, || 2023-June-16 }}
<li>{{hilite | formed with recesses for fasteners, || 2023-June-16 }} and
<li>{{hilite | press-formed to bevel the edges, for load distribution over the substrate. || 2023-June-16 }}
</li></ol> || 2024-February-1 }}
<li>{{hilite | EPDM pads used to support panel clips|| 2021-June-30 }}
<ol>
<li>{{hilite | must be sufficiently dense and thick (after compression)|| 2021-June-30 }}
<ol>
<li>{{hilite | to equal the thickness of the ventilation layer (Ref. [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]),|| 2021-June-30 }} and
<li>to resist curling when placed under load.
</li></ol>
<li>shall extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
</li></ol>

====9.2.1.7. {{hilite |Sealants|| 2022-February-5 }}====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</li></ol>
<li>Sealants shall conform to any one of the following standards:
<ol>
<li>CGSB 19-GP-5M, "Sealing Compound, One Component, Acrylic Base, Solvent Curing"
<li>CAN/CGSB-19.13, "Sealing Compound, One Component, Elastomeric, Chemical Curing"
<li>CGSB 19-GP-14M, "Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing"
<li>CAN/CGSB-19.24, "Multi-Component, Chemical Curing Sealing Compound"
</li></ol>
</li></ol>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the roof surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1., "Use of Accepted Materials"]]).
<li>The ''Contractor'' must retain factory packaging or provide other adequate covering for metal panels, to protect them from condensation between adjacent surfaces, until the panels are installed.
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Roof Panel Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer''.
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite | be constructed only with RoofStar-accepted panels secured by hidden clips; flange-fastened panels are not permitted|| 2022-February-5 }}.
</li></ol>
</li></ol>

===9.3.2. All Systems===
===={{hilite | 9.3.2.1. Preparation of Substrate || 2023-June-16 }}====

<ol>
<li>All supporting decks must be acceptable to the ''manufacturer'' and must be
<ol>
<li>made suitable for roofing by others (trades other than the ''Contractor''),
<li>dimensionally stable,
<li>structurally sound,
<li>capable of accommodating ''roof system'' component movement,
<li>clean,
<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[ASM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
<li>reasonably smooth and free of abrupt elevation changes, and
<li>absolutely free of
<ol>
<li>dust,
<li>dirt,
<li>voids,
<li>open cracks,
<li>sharp projections,
<li>contaminants,
<li>objectionable surface treatments,
<li>laitance (concrete must be “native”),
<li>oil, and
<li>grease
</li></ol>
</li></ol>
<li>All concrete decks must cure at least 28 days before receiving adhered membranes, but this limitation may be reduced if both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record ("adhered", as used in this requirement, means fully or intermittently bonding any membrane to the deck with an adhesive, hot asphalt (bitumen), or heat),
<li>Plywood decks with cracks or loose knots must be filled or overlaid with plywood (See [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]).
<li>Joints between plywood deck panels must be prepared and reinforced according to the manufacturer’s published requirements.
<li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
</li></ol>

====9.3.2.2. Preparation of Roofing Materials====

<ol>
<li>{{hilite | Roofing materials must be prepared for installation as required by the ''manufacturer''. || 2023-June-16 }}
</li></ol>

====9.3.2.3. General Requirements for Panel Installation====

<ol>
<li>Panels must be handled with non-marring slings and hoisted using a spreader bar.
<li>Sheet steel, copper, and zinc roof panels must be installed with a continuous minimum tolerance gap of 1/8” between the heels of the panels.
</li></ol>

====9.3.2.4. Panel Securement and Seams====

<ol>
<li>Panels must be secured to resist
<ol>
<li>{{hilite | ''Specified Wind Loads'' calculated for the ''roof system'' and shall conform to the specified design for the ''roof assembly'', and || 2023-June-16 }}
<li>{{hilite |gravitational (drag) loads|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All panels must be secured to a firm support, and when clips are used to secure metal panels, the clips must be firmly supported by the roof deck, bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' || 2023-June-16 }} (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>{{hilite | Clips that are unsupported by EPDM pads must be sealed against water intrusion by embedding the clips in a compatible sealant (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
<li>Unless otherwise permitted by the '''''Guarantor''''', clips must be attached by at least two fasteners (Ref. [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>Concealed fasteners shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and should provide clearance for the underside of the metal panel.
<li>Seam height shall conform to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }} of this Part.
<li>{{hilite | Where sealant is required in panel seams (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}), it shall be applied to evenly engage the top of the seam where panels join, as illustrated in '''Figure 9.3.2.4.-A.''' || 2025-January-31 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.3.2.4.-A Butyl Sealant in Seams''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 9.3.2.4.(7) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:ASM Figure 9.3.2.4.-A.png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6b/ASM_Figure_9.3.2.4.-A.png | 500 px]]
|}

====9.3.2.5. Panels Over Ventilation Materials or Voids====
(See [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])

<ol>
<li>When the roof is designed and constructed with {{hilite | a void or ventilation materials immediately beneath the metal panels, panels must be secured using|| 2021-June-30 }}
<ol>
<li>standard-height clips (matching the height of panel seams), which must be {{strike| fully supported || 2024-January-25 }} {{hilite | installed || 2025-January-31 }} {{hilite | on engineered bearing plates fully supported by appropriately sized || 2025-January-31 }} closed-cell {{hilite | EPDM {{strike| foam || 2024-January-24 }} pads|| 2025-January-31 }}, or
<li>{{hilite |tall clips, which must be|| 2021-June-30 }}
<ol>
<li>{{hilite |fabricated to match the combined height of the {{hilite | bearing plate || 2025-January-31 }}, EPDM {{strike| foam || 2024-January-24 }} pad, and the panel seam,|| 2021-June-30 }}
<li>secured with fasteners into their supports, and
<li>fully embedded in a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7., "Sealants"]]).
</li></ol>
</li></ol>
<li>EPDM foam pads employed to support standard-height panel clips are not a RoofStar-accepted material but nevertheless must
<ol>
<li>be fabricated with sufficient density and thickness (after compression) to equal the thickness of the ''ventilation layer'', and
<li>extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath panels that are not supported by a ''ventilation layer'', panels shall be supported by tall clips secured in keeping with the requirements in this Part|| 2021-June-30 }}.
</li></ol>

====9.3.2.6. Panel Terminations====

<ol>
<li>Metal panels must be secured at, {{hilite | and engaged to|| 2021-June-30 }}, the eaves by a continuous metal hook strip (see [http://rpm.rcabc.org/index.php?title=ASM_10.1.1_Eave_%26_Rake_Flashing_(Mechanical_Seam) ASM 10.1.1 Eave & Rake Flashing (Mechanical Seam)]).
<li>{{hilite | All panel terminations at the top of a slope must be|| 2021-June-30 }}
<ol>
<li>turned up (bread-panned) to {{hilite | match the panel seam|| 2021-June-30 }} height, and shall not be cut, and
<li>{{hilite |flashed with a positively shedding cap, hip or ''wall'' flashing (see [[#10.3.4. Perimeter Details, Walls, and Openings | Subsection 10.3.4., "Perimeter Details, Walls, and Openings"]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |When panels terminate at the top of a ''common slope'' or ''low slope'' roof (slopes up to and less than 1:1 (12” in 12”)), they must be closed with additional metal Z-closure|| 2021-June-30 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened to the metal roof panel, or fastened through the panel into the ''deck'' when the fasteners also serve as drag load securement|| 2021-June-30 }}.
</li></ol>
</li></ol>

====9.3.2.7. Reserved====
====9.3.2.8. Curved Panels====
(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])

<ol>
<li>All panels manufactured for a curved substrate
<ol>
<li>must be supported by a Variance issued by the '''''Guarantor''''' prior to tender (see [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>must be power-curved as a continuous panel, without segments,
<li>shall be manufactured with seams conforming to [[#9.1.3.3. Panel Seams | Article 9.1.3.3.]], and
<li>must continuously cover a curved substrate (segmented panels are not permissible).
</li></ol>
<li>Roofs constructed with curved panels must incorporate a ventilation space in keeping with [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]
</li></ol>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify {{hilite | the connections between the ''roof system'' and ''walls'' or other building components, particularly where the continuity of air, vapour and water-resistive layers is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]|| 2021-October-30 }}).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>{{hilite | Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Where the roof deck and an adjoining wall are constructed of dissimilar materials (i.e., steel deck joined to concrete wall), differing expansion and contraction rates for the two materials may adversely affect the roof system and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular roof-wall intersection || 2023-June-16 }} (See [[Notes to ASM Standard#A-10.1.3.1. | Note A-10.1.3.1. ]]).
<li>{{hilite | When EIFS cladding is cut to permit roofing work, the exposed insulation must be restored with back-wrapped mesh, a base coat and finish coat, or with another method that is equal or superior|| 2022-October-22 }} (See [[Notes to ASM Standard#A-10.1.2.2| Note A-10.1.2.2]]).
<li>Fascia may be covered with metal flashing and specified as part of the ''roof system''.
</li></ol>

====10.1.3.2. Flashing====

<ol>
<li>All changes in plane in the ''roof system'', and all intersections between the roof field and roof edges, ''walls'', or ''parapets'', must be flashed with {{hilite | material conforming to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]] {{strike| self-adhering sheet membrane eave protection, and with metal flashing || 2023-January-26 }}
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings designed for ''common slope'' and ''low slope'' roofs (slopes up to and including 1:1 (12” in 12”)) must be secured with hooked metal Z-closures which are || 2021-June-23 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Cap and hip flashings designed for ''steep slopes'' (roofs with a slope greater than 1:1 (12” in 12”)) may be|| 2021-June-30 }}
<ol>
<li>{{hilite | secured with metal Z-closures installed in keeping with the requirements in [[#10.3.4.1. Ridges | Article 10.3.4.1.]]|| 2021-June-30 }}, or
<li>{{hilite | secured to the standing seams with acceptable fasteners (flashing may be turned down between panel ribs to close off openings, to provide further protection from the weather)|| 2021-June-30 }}.
</li></ol>
</li></ol>

====10.1.4.2. Eave and Rake Edges====

<ol>
<li>Eave and rake edge details shall
<ol>
<li>be designed to resist wind uplift loads, and shall conform to the requirements in [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]], and
<li>{{hilite | permit the drainage of any liquid water out of the roof system (Ref. || 2023-October-28 }} [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====10.1.4.3. Walls====

<ol>
<li>Roof-to-wall flashings must
<ol>
<li>be engineer-designed to resist wind uplift, and
<li>allow for expansion and contraction.
</li></ol>
<li>All connecting flashings must be firmly secured
<ol>
<li>{{hilite |to a ''wall'' using a concealed continuous clip fastened at intervals not exceeding 304.8 mm (12”) O.C. (exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite |to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape, and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
</li></ol>

====10.1.4.4. Reserved====
====10.1.4.5. Windows and Wall Openings====

<ol>
<li>{{hilite | Windows and other wall openings adjacent an Architectural Sheet Metal Roof System shall conform to the relevant requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", || 2023-June-16 }} [[SBS_Roof_Systems_Standard#10.1.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.1.4.5.]].
</li></ol>

===10.1.5. Valleys===
====10.1.5.1. {{hilite | General Requirements for Valleys || 2026-February-1 }}{{strike| Valley Protection Membrane || 2025-February-1 }}====

<ol>
<li>{{hilite | Valleys should not terminate downslope at a wall or curb || 2026-February-1 }}.
<li>{{hilite | When the slope of a valley is less than 1:6 (2” in 12”) the ''Design Authority'' should consider designing the valley with a waterproofing membrane system rather than with a self-adhering underlayment and metal valley flashing || 2026-February-1 }} {{hilite | (See|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) (Metal Panels and the Coefficient of Thermal Expansion) | {{hilite | Note A-10.1.5.1.(2)|| 2026-February-1 }}]]).
{{strike| <li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]] || 2025-February-1 }}
</li></ol>

====10.1.5.2. Valley {{hilite | Protection || 2026-February-1 }}{{strike| Flashing || 2025-February-1 }}====

<ol>
<li>All valleys must be designed with both membrane flashing and metal valley flashing.
<li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]]
<li>Metal flashing must
<ol>
<li>incorporate a divider measuring at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider, and
<li>be secured to resist gravitational ("drag") loads.
</li></ol>
<li>Metal valley flashing shall be at least 127 mm (5") wide, measured between the divider and the edge of the metal roof panel, and may be either hooked or unhooked (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]).
</li></ol>

====10.1.5.3. Valleys for Heavy Snow Loads====

<ol>
<li>In regions with high snow loads, the minimum valley width should be increased and flared to widen at the eave (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]], and [[#10.1.5.1. Valley Protection Membrane | Article 10.1.5.1.]]).
</li></ol>

====10.1.5.4. Reserved====
====10.1.5.5. {{hilite | Crickets and|| 2026-February-1 }} Dead Valleys====
{{hilite | (See '''Figure 10.1.5.5.-A''' and '''Figure 10.1.5.5.-B''')|| 2026-February-1 }}

<ol>
<li>{{hilite | When terminating a valley at a ''wall'' or ''curb'' is unavoidable, the design must incorporate a cricket covered with a ''waterproofing roof system'', to divert water off the roof|| 2026-February-1 }}.
<li>{{hilite | Dead valleys should be avoided|| 2023-June-16 }}{{hilite |, but {{hilite | when a cricket is not practicable and|| 2026-February-1 }} roof slope terminates in a dead valley, it must be designed as a ''waterproofing roof system'' {{strike| the design must conform to the Application requirements in || 2023-June-16 }} [[#10.3.5.7. Dead Valleys | Article in 10.3.5.7.]] || 2025-February-1 }}
<li>{{hilite | All ''waterproofing roof systems'' used on crickets or in dead valleys must be carried up the vertical face of ''wall'' and ''curbs'' at least 304.8 mm (12”) when measured vertically from the ''drainage plane'', and any ''wall'' finishes must be terminated at least 203.2 mm (8”) above the cricket or dead valley, when measured vertically from the ''drainage plane'' || 2026-February-1 }} (See [[#10.3.5.7. Dead Valleys | {{hilite | Article in 10.3.5.7.|| 2026-February-1 }}]] and [[#10.3.7.2. Intersections with Waterproofing Roof Systems | {{hilite | Article 10.3.7.2.|| 2026-February-1 }}]]).
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5.-A Crickets and Dead Valleys''' Forming Part of Sentence 10.1.5.5.(1) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5-B Crickets and Waterproofing to Improve Drainage''' Forming Part of Sentence 10.1.5.5.(2) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 10.1.5.5.-A.png | link=https://rpm.rcabc.org/images/0/0e/ASM_Figure_10.1.5.5.-A.png | 400 px]] || [[File:ASM Figure 10.1.5.5.-B.png | link=https://rpm.rcabc.org/images/5/51/ASM_Figure_10.1.5.5.-B.png | 400 px]]
|}

==={{hilite | 10.1.6. Expansion and Control Joints || 2024-October-20 }}===
====10.1.6.1. Reserved====

====10.1.6.2. Control Joints====

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (roof dividers), and
<li>to specify their location and design.
</li></ol>
<li>{{hilite | Unless otherwise approved by the '''''Guarantor''''', ''control joints'' must be specified to divide a new ''roof system'' (addition) from existing ''roof systems'' || 2023-June-16 }} (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Roof Systems===
====10.1.7.1. Intersections with Waterproofing Roof Systems====

<ol>
<li>Intersections with ''water-shedding roofs'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Intersections with Membrane Gutters====

<ol>
<li>Refer to [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membrane====

<ol>
<li>{{hilite | Where a self-adhered membrane is required for flashing, it shall conform to the requirements for eave and valley protection in || 2024-January-31 }}{{hilite | {{strike| See || 2023-January-25 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] {{strike| for sheet membrane requirements. || 2023-January-26 }}|| 2021-June-30 }}
<li>{{hilite | Where the ''roof assembly'' adjoins a ''wall'', the ''wall'' must be flashed to provide continuity with the wall ''control layers'', and with the ''roof system'' underlayment using materials accepted by the '''''Guarantor''''' and having the following properties: || 2024-January-31 }}
<ol>
<li>{{hilite | When the primary slope of the roof is less than 1:6 (2" in 12"), flashing must be a self-adhered membrane with a minimum thickness of 3 mm (118 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is 1:6 (2" in 12") or greater but less than 1:3 (4" in 12"), flashing must be an exterior-reinforced self-adhered membrane with a minimum thickness of 1 mm (39 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is greater than 1:3 (4" in 12"), flashing material may be self-adhered or nail-applied. || 2024-January-31 }}
</li></ol>
{{strike| <li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm. || 2023-January-26 }}
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into roof perimeters and walls must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, ''Linear Metal Flashing'']]
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''linear metal flashing'' shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====
<ol>
<li>All wall surfaces to which roofing materials must be installed (including Concrete Masonry Unit (CMU)) must be declared suitable by the ''manufacturer'', or they must be covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membrane flashing shall be prepared following the ''manufacturer's'' published requirements.
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>All changes in plane in the ''roof assembly'' must be waterproofed beneath metal flashing with a self-adhering eave protection sheet membrane acceptable to the '''''Guarantor'''''.
<li>''Projects'' must follow proper sequencing so that materials, ''systems'', or ''assemblies'', installed by the ''Contractor'' correctly interface with materials, ''systems'', or ''assemblies'' installed by other trades, to establish or preserve continuity and ensure positive waterproofing connections (overlapping, “shingle fashion”).
<li>When coordination with other trades requires some adaptation to the requirements in this Standard, any variance to proper detail sequencing must be approved in writing by the ''Design Authority''.
<li>{{hilite | All sheet membrane flashing must be installed to conform to the ''manufacturer's'' published instructions, and must|| 2021-October-30 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]],
<li>{{hilite | be ''fully bonded'' to an acceptable substrate,|| 2021-October-30 }}
<li>{{hilite | be installed without fish-mouths or wrinkles|| 2021-October-30 }},
<li>{{hilite | be hand-rolled with a ''manufacturer’s'' accepted roller and ''fully bonded'' to an acceptable, prepared substrate|| 2021-October-30 }},
<li>be reinforced at all inside and outside corners with membrane gussets, measuring at least 101.6 mm x 152.4 mm (4” x 6”), excluding the tapered ends,
<li>overlap any wall membranes or finishes by at least 50.8 mm (2”), and
<li>underlap any wall membranes or finishes by at least 76.2 mm (3").
</li></ol>
<li>{{hilite | The upper termination of sheet membrane flashing must be protected from damage, and from water intrusion, || 2023-June-16 }}
<ol>
<li>{{hilite | with linear metal flashing installed in keeping with || 2023-June-16 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]], or
<li>{{hilite | with a wall finish installed by others. || 2023-June-16 }}
</li></ol>
<li>When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination.
<li>When sheet membrane flashing is mechanically secured with a termination bar or a metal flashing, fasteners must be spaced no more than 304.8 mm (12”) O.C.
<li>When a second metal flashing is installed to protect a termination bar or flashing used to secure the sheet membrane flashing, it may be fastened no more than 609.6 mm (24”) O.C., provided the ''linear metal flashing'' maintains continuous contact with the substrate.
<li>When closer fastener spacing is required by the ''manufacturer'', the wall must be constructed or modified to facilitate solid fastener securement.
<li>''Linear metal flashings'' must be secured in keeping with the requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]]
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>Membrane flashing must be protected from damage with full-coverage ''linear metal flashing''.
</li></ol>

===10.3.3. Reserved===
===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings installed on slopes 1:6 (2" in 12") up to and less than 1:1 (12” in 12”)|| 2021-June-30}} must be hooked to metal Z-closures which are
<ol>
<li>set in two (2) rows of gunnable sealant or sealant tape, and
<li>fastened through the metal roof panel into the deck.
</li></ol>
<li>{{hilite | Cap and hip flashings installed on roofs with a slope greater than 1:1 (12” in 12”) (''Steep Slopes'') may be|| 2021-June-30}}
<ol>
<li>{{hilite | hooked to a metal Z-closure|| 2021-June-30}}, and
<li>{{hilite | mechanically fastened to the standing seam with an acceptable fastener|| 2021-June-30 }}.
</li></ol>
<li>For roof slopes
<ol>
<li>up to 2:3 (8” in 12”), metal cap/hip flashing must extend a minimum of 152.4 mm (6") over metal roof panels, measured from the back pan, and extending on each side of the ridge/hip.
<li>equal to or greater than 2:3 (8” in 12”), the metal cap/hip flashing may be reduced by 76.2 mm (3”) over metal roof panels, measured from the back pan and extending on each side of the ridge/hip.
<li>greater than 1:1 (12” in 12”), an underlying support at the centre of the ridge is required to support the ridge cap flashing.
</li></ol>
</li></ol>

====10.3.4.2. Eaves and Rake Edges====
(See Construction Detail [[ASM Eave and Rake Edges (Mechanical Seams) | "Eave and Rake Edges (Mechanical Seams)"]])

<ol>
<li>All linear metal flashing installed at the eave or rake edges must
<ol>
<li>be completely separated from a wood ''deck'' with eave protection sheet membrane (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]), and
<li>allow for metal panel expansion and contraction.
</li></ol>
<li>Eave protection sheet membrane installed to separate eave and rake edge metal flashing from a wood ''deck'' shall extend past the edges of a flashing by at least 6.35 mm (1/4").
<li>Eave metal flashing
<ol>
<li>must be fabricated to secure the eave edge of the panel in place,
<li>shall extend onto the sloped ''deck'' or supporting member at least 76.2 mm (3”),
<li>shall be secured
<ol>
<li>along the top flange with screws spaced in accordance with the engineered design but no further apart than 304.8 mm (12”) O.C.,
<li>on the fascia metal flashing, utilizing a continuous clip fastened a maximum of 304.8 mm (12") O.C., and
<li>shall be covered with eave protection sheet membrane.
</li></ol>
<li>When external metal gutters are installed (See [[#11.3.3.9. External Gutters | Article 11.3.3.9.]]), linear metal eave flashing with a face less than 50.8 mm (2”) do not require a clip but must be securely fastened with an alternative method acceptable to ''Design Authority''.
</li></ol>
<li>Rake edge metal flashing must be firmly secured
<ol>
<li>{{hilite | to a ''wall'' using a concealed continuous clip fastened a maximum of 304.8 mm (12”) O.C. (Ref. [[#Part 13 - Linear Metal Flashing | Part 13]] for clip requirements; exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite | to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Where external metal gutters will be installed, the eave metal flashing should be installed to accommodate the gutter and hangar.
<li>When gutter hangars are to be fastened behind the eave flashing, the eave flashing does not require a continuous clip and may be face-screwed together with the gutter hangar.
</li></ol>
</li></ol>

====10.3.4.3. Reserved====
====10.3.4.4. Reserved====
====10.3.4.5. Windows and Wall Openings====

<ol>
<li>Windows and other wall openings that intersect with the ''roof system'' shall be flashed with membrane and metal conforming to the requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.3.4.5.]]
</li></ol>

===10.3.5. Valleys===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.5.1. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membrane must be installed in keeping with the requirements in [[#8.3.2.2. Valley Protection | Article 8.3.2.2.]]|| 2021-June-30 }}
</li></ol>

====10.3.5.2. General Requirements for Valley Metal Flashing====

<ol>
<li>Drag load fastening is mandatory on all valleys.
<li>Metal valley panels must
<ol>
<li>be installed shingle fashion,
<li>overlap the adjacent lower panel at least 203.2 mm (8"), and
<li>be sealed at the lapped joint with two horizontal rows of approved sealant.
</li></ol>
<li>Valley dividers are required and must be at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider.
<li>Exposed valleys must be at least 254 mm (10") wide (no less than 127 mm (5") per side, measured from the divider to the metal roof panel); wider valleys are recommended in high snow load areas (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]] and [[#10.1.5.3. Valleys for Heavy Snow Loads | Article 10.1.5.3.]]).
<li>{{hilite | Metal valley sections (hooked or unhooked) || 2023-June-16 }}
<ol>
<li>must overlap the section immediately down-slope at least 203.2 mm (8"),
<li>shall be embedded in at least two rows of an acceptable sealant or butyl tape where they overlap,
<li>shall be secured in keeping with the specified design, and
<li>shall be flashed ("stripped in") and sealed to the ''valley protection'' membrane with eave protection sheet membrane conforming to [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<ol>
<li>measuring at least a 304.8 mm (12”) in width, and
<li>applied to extend past the flashing fasteners by at least 38.1 mm (1-1/2”).
</li></ol>
</li></ol>
<li>Reverse laps must be sealed with a membrane-compatible sealant.
</li></ol>

====10.3.5.3. Hooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.1_Hooked_Valley_Flashing ASM 10.3.1 Hooked Valley Flashing])

<ol>
<li>Hooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.3. Hooked Metal Valleys | Article 10.3.5.3.]],
<ol>
<li>be fabricated with a built-in hook strip returned 38.1 mm (1-1/2") to
<ol>
<li>form a water cut-off, and
<li>hook onto the valley metal panel, and
</li></ol>
<li>incorporate a flange measuring at least 76.2 mm (3”) wide, to secure the metal valley flashing to its substrate.
</li></ol>
</li></ol>

====10.3.5.4. Unhooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.2_Unhooked_Valley_Flashing ASM 10.3.2 Unhooked Valley Flashing])

<ol>
<li>Unhooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.4. Unhooked Metal Valleys | Article 10.3.5.4.]],
<ol>
<li>be hemmed with a return measuring at least 38.1 mm (1-1/2") to form a water cut-off, and
<li>secured with continuous cleats
<ol>
<li>be fabricated from 26-gauge flat metal stock (min. thickness), and
<li>be fabricated with a leg measuring at least 76.2 mm (3”) wide.
</li></ol>
</li></ol>
</li></ol>

====10.3.5.5. Reserved====
====10.3.5.6. Reserved====
====10.3.5.7. Dead Valleys====

<ol>
<li>Dead valleys must be
<ol>
<li>waterproofed to conform to the requirements for membrane gutters (See [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]), and
<li>sloped at least 1:50 (2%, or 1/4” in 12”), to positively drain
<ol>
<li>into one or more roof drains{{hilite |, or || 2021-February-7 }}
<li>onto a lower ''water-shedding'' roof.
</li></ol>
</li></ol>
<li>{{hilite | Transitions from a dead valley to the metal panel system must conform to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]], and where a wall is present, a diverter shall be incorporated to protect the ''wall system''.|| 2021-February-7 }}.
</li></ol>

===10.3.6. Reserved===

===10.3.7. Intersections with Other Roof Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where two ''roof systems'' intersect, materials must be compatible with each other, or must be separated from contact by an intermediate separation layer.
</li></ol>

====10.3.7.2. Intersections with Waterproofing Roof Systems====

<ol>
<li>When a ''waterproofing roof system'' transitions down a slope onto a lower ''water-shedding roof system'', the ''waterproofing roof system'' membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the maximum water level,
<li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'', or
<li>304.8 mm (12”) plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'' or maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing roof system'' sheet membrane flashing on the slope must be mechanically secured, separately from the water-shedding ''roof system'',
<li>''underlayment'' must overlap the ''waterproofing roof system'' sheet membrane flashing by no less than 101.6 mm (4”),
<li>{{hilite |metal panels must overlap the ''waterproofing roof system'' sheet membrane flashing by at least 152.4 mm (6”) (A metal counter-flashing with an exposure of at least 101.6 mm (4”) is required at the bottom termination of the metal panels|| 2021-June-30}}), and
<li>fasteners for the ''water-shedding roof system'' must be at least 203.2 mm (8”) above the ''finished system surface'' of the ''waterproofing roof system'' (when measured vertically), or 304.8 mm (12”) for regions with heavy snow.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Intersections with Membrane Gutters====

<ol>
<li>Refer to the requirements in [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</li></ol>

===10.3.8. Reserved===

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=

==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary roof drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''roof assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a drain leader and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and
<li>{{hilite |which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.|| 2020-July-3 }}
</li></ol>
<li>''Primary roof drain'' means the primary means of draining water from the roof.
<li>''Roof drain'' means “A fitting or device that is installed in the roof to permit storm water to discharge into a ''leader''.” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("Scupper") means an open or closed roof drain that conveys water laterally from one roof area to another, or from the roof directly to the exterior of the building.
<li>''Secondary roof drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary roof drain''. An ''overflow drain'' is a type of ''secondary roof drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 15-year Guarantee''''' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
<li>The ''Design Authority'' is responsible for the design of roof drainage.
<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} {{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }} {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
<li>{{hilite |The size (flow rate) of roof drains and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }} {{hilite | (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location)|| 2027-February-1 }}.
<li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li>drain type, size, flow rate, and
<li>size and placement of the ''overflow drain''.
</ol></li>
<li>{{hilite |The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation) || 2021-October-23 }}
<ol>
<li>roof slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>{{hilite | the location of the ''drainage plane''|| 2021-October-30 }} {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished system surface'', {{hilite | and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design|| 2021-October-30 }}).
</li></ol>
<li>Roofs may drain off a roof edge, or by means of internal plumbing (both are permissible under the '''''RoofStar Guarantee Program''''').
<li>When a roof is designed to drain off an edge, water may drain freely, it may be diverted to a lower roof area, or it may be collected and diverted into a drainage system (plumbing) by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]).
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.
<li>When a roof is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow restrictor is present in an existing cast drain leader, the restrictor should be reinstalled.
</li></ol>

====11.1.3.2. Roof Drain Function and Location====

<ol>
<li>Roof drains must be used only for draining water.
<li>''Roof drains'' on new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>When existing ''roof drain'' and penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3.,"All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast-iron Roof Drains====

<ol>
<li>Only cast-iron roof drains, and existing external couplers used to connect drains to leaders, may be re-used for roof replacement ''projects''.
<li>Drain extensions for cast-iron roof drains should be avoided, since the connection with the cast drain is not sealed; the result is a leak into the roof system.
</li></ol>

====11.1.4.2. Scuppers and Overflows====
(See [[Notes to ASM Standard#A-11.1.4.2. | Note A-11.1.4.2.]])

<ol>
<li>A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}..
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the roof, in the event of ''primary roof drain'' failure.
<li>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be
<ol>
<li>located no higher than 101.6 mm (4”) above {{hilite | the ''drainage plane''|| 2021-October-30 }},
<li>situated so that they freely and visibly discharge storm water, and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====11.1.4.3. Membrane Gutters====
(See [[Notes to ASM Standard#A-11.1.4.3. | Note A-11.1.4.3.]])

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' {{hilite | (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) || 2023-June-16 }} only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>{{hilite | The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to|| 2020-July-3 }}
<ol>
<li>{{hilite | rainfall and snow load calculations for the building location|| 2020-July-3 }},
<li>{{hilite | drain type, size, and flow rate|| 2020-July-3 }}, and
<li>{{hilite | size and placement of the ''overflow drain''|| 2020-July-3 }}.
</li></ol>
<li>New membrane ''gutters'' shall be designed with a minimum width of 304.8 mm (12”) and a depth not exceeding the ''gutter’s'' width.
<li>At least 101.6 mm (4") clearance on the horizontal plane is required between any membrane ''gutter'' wall and the
<ol>
<li>the edge of the drain bowl for spun drains, and
<li>the edge of the drain leader for flat spun or welded drains.
</ol></li>
<li>Only fully-adhered membranes may be used in membrane ''gutters''.
<li>Metal ''gutter'' liners are permissible, provided they are designed to fit over acceptable waterproofing, and the liners conform to the material requirements in [[#11.2.1.3. Membrane Gutters and Gutter Liners | Article 11.2.1.3.]]
<li>''Conventionally insulated systems'' that drain into a membrane ''gutter'' must abut solid blocking at the ''gutter'' edge, which provides
<ol>
<li>a stop for the insulation ''assembly'', and
<li>a solid substrate for the securement of flashings and membranes.
</ol></li>
<li>An ''overflow drain'' must be located at least
<ol>
<li>101.6 mm (4”) above the primary membrane ''gutter'' drain, and
<li>25.4 mm (1”) below any mechanical fasteners used to secure the adjoining ''roof system''.
</ol></li>
<li>In roof replacement applications, existing membrane ''gutters'' may qualify for a '''''RoofStar Guarantee''''', but should be redesigned if their capacity is undersized, and must incorporate an overflow drain in keeping with the requirements in this Part.
<li>Where the primary drain in an existing membrane ''gutter'' is undersized for its capacity, the primary drain must be replaced with one that is properly sized.
<li>When a membrane ''gutter'' adjoins a RoofStar-guaranteed ''water-shedding system'', the transition from gutter to ''roof system'' shall conform to [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</ol></li>

====11.1.4.4. External Gutters====

<ol>
<li>{{hilite | External gutters and downspouts are not covered by the '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | Notwithstanding other requirements in this Part, when a roof drains onto another roof, the drainage of water must be controlled to eliminate or mitigate damage from water flow || 2021-June-22 }}; {{hilite | the use of splash pads, when appropriate for the location, is strongly recommended|| 2021-June-30 }}.
<li>{{hilite |Downspouts, installed by the ''Contractor'' or other trades and laid directly against the slope of the roof to connect an upper roof drainage to lower gutters, is acceptable under the '''''RoofStar Guarantee Program''''', provided the material is strongly secured both at the top and the bottom, and the issue of dissimilar metal corrosion can be eliminated|| 2021-June-30 }}.
</li></ol>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>{{hilite | Except for cast-iron roof drains, which are usually supplied and installed by others, only new drains and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>{{hilite | All roof drains and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''|| 2026-July-1 }}.
<li>Reuse of any penetration flashing or drain (except serviceable cast iron drains) is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]])|| 2021-February-5 }}.
<li>{{hilite | Where drains or overflows are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}.
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to ASM Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All roof drains
<ol>
<li>must be designed and manufactured for roof applications only, and shall not be floor drains, and
<li>shall be made so that the roof membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast-iron ''primary roof drains''
<ol>
<li>must be supplied with a sump receiver and under-deck clamp,
<li>should separate securement of the under-deck clamp and clamping ring from securement for the strainer, and
<li>{{hilite | must be installed by the trade supplying the roof drain. || 2023-June-16 }}
</li></ol>
<li>{{hilite | Cast-iron ''scupper drains'' must be || 2023-June-16 }}
<ol>
<li>{{hilite | supplied with a clamping strainer, || 2023-June-16 }} and
<li>{{hilite | designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable). || 2023-June-16 }}
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li> must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li> must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>should incorporate a clamping ring (a clamping ring is recommended for ''primary flanged insert drains'' specified on any ''project''), but clamping rings are required when ''primary flanged insert drains'' are specified for a '''''RoofStar 15-year Guarantee'''''.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that connect with plumbing inside the building|| 2026-July-1 }} (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that drain directly to the exterior of the building|| 2026-July-1 }} (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the drain to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the scupper,
<ol>
<li>equal in capacity to the main drain leader opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>{{hilite | must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but || 2026-July-1 }}
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>{{hilite | may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and|| 2026-July-1 }}
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.{{strike|, and || 2025-May-29 }}
</li></ol>
</li></ol>

====11.2.1.3. Membrane Gutters and Gutter Liners====

<ol>
<li>Membrane gutter membranes shall be
<ol>
<li>accepted by the '''''Guarantor''''',
<li>acceptable to the ''manufacturer'',
<li>compatible with the adjoining ''roof system'', and
<li>manufactured for full adhesion (semi-adhesion and mechanical securement are not permissible).
</ol></li>
<li>A reinforced liquid membrane systems (PMMA or PUMA) approved for field use and applied to an accepted SBS-modified base membrane is acceptable as a ''gutter'' membrane.
<li>A metal ''gutter'' liner
<ol>
<li>may be fabricated from
<ol>
<li>copper sheet material, incorporating soldered seams, or
<li>stainless steel, incorporating welded seams, and
</ol></li>
<li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</ol></li>
</ol></li>

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure the roof membrane and penetration flashings, or related accessories, must be
<ol>
<li>properly sized in accordance with ''roof system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>{{hilite | Only a RoofStar-accepted|| 2021-February-7 }} reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} liquid membrane flashing system may be used on the water plane to flash roof drains, scuppers, and overflows.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Roof Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Roof Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>Roof drains for new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The 304.8 mm (12”) spacing requirement for roof drains does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>Roof drains and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the drain.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All roof drains must be supplied and installed with a secured strainer to prevent debris from blocking the drain.
</ol></li>

====11.3.2.4. Membrane Flashing====

<ol>
<li>Drains must be flashed using the membrane specified and installed to waterproof a gutter, and shall be acceptable to the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} may be used on the ''drainage plane'' to flash roof drains, ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains and Membrane Gutters===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====
====11.3.3.2. General Requirements for Cast-iron Roof Drains====

<ol>
<li>Cast-iron roof drains must be installed by the plumbing/mechanical trade.
<li>When cast-iron roof drains are used, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain.
<li>Drain extensions for cast-iron roof drains should be avoided.
<li>Existing flow restrictors removed during roof construction should be reinstalled.
<li>All cast-iron roof drains must be
<ol>
<li>new or clean,
<li>unbroken (this applies to the clamping ring also), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The continuity of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast-iron Drains Installed with Lead Flashing====

<ol>
<li>Cast-iron roof drains installed with lead flashing shall conform to the requirements of Article 11.3.3.3. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.4. Cast-iron Drains Installed with Membrane Flashing====

<ol>
<li>Cast-iron roof drains installed with sheet membrane flashing shall conform to the requirements of Article 11.3.3.4. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Cast-iron roof drains retrofitting shall conform to the requirements of Article 11.3.3.5. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flange-type roof drain installation shall conform to the requirements of Article 11.3.3.6. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>''Scupper'' and ''overflow'' installation shall conform to the requirements of Article 11.3.3.7. in the Standard for the membrane used to waterproof their installation.
</li></ol>

====11.3.3.8. Membrane Gutters====

<ol>
<li>All ''gutter'' membrane construction shall conform to the requirements of Article 11.3.3.8. in the Standard for the membrane used in related waterproofing applications.
</ol></li>

====11.3.3.9. External Gutters====

<ol>
<li>When external gutters are attached to an Architectural Sheet Metal Roof System, they shall not interfere with the free movement of water or air away from the ''roof system''.
</ol></li>

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |be designed to utilize the split panel detail; flexible boot flashings secured with gasketed screws are not permitted|| 2022-February-5 }}, and
<li>{{hilite |specify two storm collars separated by no more than 76.2 mm (3”), for all penetration flashings that do not incorporate a settlement cap|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>{{hilite | Where a roof design includes openings through the ''roof assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall || 2024-June-15 }}
<ol>
<li>{{hilite | provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and || 2024-June-15 }}
<li>{{hilite | require a ''curb'' or an acceptable penetration flashing to enclose and seal each roof opening. || 2024-June-15 }} {{strike| must be enclosed and sealed with a ''curb'', or a penetration flashing || 2023-June-15 }}
</li></ol>
<li>{{hilite | Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others. || 2023-June-16 }}
<li>{{hilite | Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head|| 2020-July-3 }}.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration, and
<li>properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form a seal || 2023-January-25 }} {{hilite | around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2") || 2024-January-31 }}, or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration; the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>{{hilite | Cylindrical ("pipe-type") penetrations must be sealed with|| 2020-July-3 }}
<ol>
<li>{{hilite | the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,|| 2020-July-3 }}
<li>{{hilite | a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. "SBS" Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | 2-Part Retrofit Flashing (Cable Penetration)]])|| 2020-July-3 }}, or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Flexible boot flashings for pipe-type penetrations
<ol>
<li>may be used for penetrations up to 152.4 mm (6”) in diameter,
<li>should be located near the upper end of a slope for long panels,
<li>must not be located on the ''drainage plane'' when the roof slope is less than 1:6 (2” in 12”),
<li>must be located at or near the centre of metal roof panels, measured between the upstands, to avoid interference with standing seams or panel ribs, or in the alternative (when interference is unavoidable) on a raised panel above seam height,
<li>must be fastened with high-domed gasketed cladding screws placed no more than 38.1 mm (1-1/2") O.C., and
<li>must be set in a bed of sealant.
</li></ol>
</li></ol>

====12.1.3.2. Reserved====

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }}
<li>When a roof is replaced and existing penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, as specified in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</li></ol>

====12.1.3.4. Curbs and Sleepers====

<ol>
<li>The design and placement of curbs and sleepers shall be the responsibility of the ''Design Authority'', but shall in any event conform to the application requirements in [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]
<li>''Curbs''
<ol>
<li>must be designed for securement directly to the ''deck'' structure, or to intermediate blocking (they must not be situated on top of the ''roof system''), and
<li>shall be designed to achieve a minimum height of 203.2 mm (8”), measured from the surface of the ''drainage plane'' (not including panel seam upstands), or from the highest point of a ''curb cricket''.
</li></ol>
<li>''Curbs'' with a width
<ol>
<li>less than 914.4 mm (36”) may be designed with a ''cricket'' but require, as a minimum, a back-pan flashing,
<li>between 914.4 mm (36”) and 2438.4 mm (96") require an architectural metal ''cricket'' with rigid support, to prevent metal distortion, and
<li>greater than 2438.4 mm (96") must
<ol>
<li>be designed to divert and drain the anticipated volume of water above the ''curb'',
<li>incorporate a ''cricket'', fully supported with insulation or framing and designed to direct water and snow to either side of the ''curb'', and
<li>incorporate a waterproofed gutter membrane installed over the ''cricket'' (Also see [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3., ''Membrane Gutters'']]).
</li></ol>
</li></ol>
<li>A waterproofed gutter membrane around a ''curb''
<ol>
<li>shall have a minimum slope of 2%, along the up-slope face of the ''curb'', to direct water around the ''curb'' and toward the eaves,
<li>should be continuous along the sides of the ''curb'', as dictated by the ''curb'' size and roof slope, or fall, and
<li>must direct water onto the lower metal panels.
</li></ol>
<li>Equipment isolators are not considered part of the ''roof system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''Guarantee'''''.
</li></ol>

====12.1.3.5. Attic Ventilation====

<ol>
<li>{{hilite | See || 2027-February-1 }} [[#1.1.3.4. Ventilation |{{hilite | Article 1.1.3.4. "Ventilation" || 2027-February-1 }}]].
</li></ol>

{{strike| <ol>
<li>{{hilite | The design and selection of the ventilation system is the responsibility of the ''Design Authority'', and may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents,|| 2021-June-30 }}
<li>{{hilite | gable end vents,|| 2021-June-30 }}
<li>{{hilite | hip vents,|| 2021-June-30 }}
<li>{{hilite | static vents,|| 2021-June-30 }}
<li>{{hilite | ridge vents, and|| 2021-June-30 }}
<li>{{hilite | cupolas.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation|| 2021-June-30 }}
<ol>
<li>{{hilite | must meet the minimum requirements of the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]) (Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee''''')|| 2021-June-30 }}, and
<li>{{hilite | shall be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite |the slope of the roof|| 2021-June-30 }},
<li>{{hilite |the vented area|| 2021-June-30 }}, and
<li>{{hilite |the design and configuration of the roof structure|| 2021-June-30 }}, and
</li></ol>
<li>{{hilite | shall be provided for roofs over cathedral ceilings.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | are acceptable and are recommended for all areas with vaulted ceilings|| 2021-June-30}}.
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
</li></ol> || 2026-January-27 }}

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed to metal panels and should be designed for attachment to vertical surfaces only.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>{{hilite | See [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] for sheet membrane requirements.|| 2021-June-30 }}
<li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm.
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>{{hilite | manufactured from sheet metal conforming to the material requirements in || 2023-June-16 }} [[#Section 13.2. Materials | Section 13.2.]], {{hilite | when the flashing is custom-made or fabricated by the ''Contractor'', || 2023-June-16 }}
<li>{{hilite | compatible with the ''roof system'', || 2023-June-16 }}
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>{{hilite | of sufficient height to extend vertically (when measured from the up-slope base of the flashing upstand to the opening at the top) at least || 2022-October-22 }}
<ol>
<li>{{hilite | 203.2 mm (8”), for slopes 0 to 1:6 (2” in 12”) || 2022-October-22 }},
<li>{{hilite | 152.4 mm (6”), for slopes greater than 1:6 and equal to 1:3 (4” in 12”) || 2022-October-22 }}, or
<li>{{hilite | 101.6 mm (4”), for slopes greater than 1:3 || 2022-October-22 }}.
</li></ol>
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
<li>{{hilite | plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer. || 2023-June-16}}
</li></ol>
<li>{{hilite | In regions that experience high snow accumulations, penetration flashings taller than the stated minimums in this Article are strongly recommended || 2022-October-22 }}.
<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} {{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }} {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>{{hilite | must slope downward from the penetration approximately 45°,|| 2021-June-30 }}
<li>{{hilite | shall be at least 50.8 mm (2”) wide|| 2021-June-30 }},
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
<ol>
<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
</li></ol>
<li>{{hilite | Chimney chase caps must be || 2021-June-30 }}
<ol>
<li>{{hilite | galvanized metal conforming to the requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]|| 2021-June-30 }},
<li>{{hilite | fabricated with penetration collars at least 152.4 mm (6") in height|| 2021-October-30 }},
<li>{{hilite | soldered at all joints in the ''drainage plane''|| 2021-June-30 }}, and
<li>{{hilite | fabricated with slope to shed water|| 2021-June-30 }}.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing Systems Penetrations====

<ol>
<li>{{hilite | Lead plumbing vent flashings must each be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated with sheet lead material weighing no less than 14.65 Kg/m2 (3lb/sf)|| 2021-June-30 }},
<li>{{hilite | properly sized for the pipe|| 2021-June-30 }}, and
<li>{{hilite | supplied with a settlement cap made from the same materials (the inside collar of the settlement cap must fit vertically inside the pipe opening by at least 25.4 mm (1”))|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be|| 2021-June-30 }}
<ol>
<li>properly sized for the penetration, both in diameter and height,
<li>flexible or sloped to suit the roof slope, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Air Vents====
{{hilite | (See [[#Article 1.1.3.4. Ventilation | Article 1.1.3.4., "Ventilation"]]) || 2027-February-1 }}

<ol>
<li>{{hilite | Vents, regardless of their type, must be either|| 2021-June-30 }}
<ol>
<li>{{hilite | proprietary to, or privately labeled for, the panel manufacturer, or|| 2021-June-30 }}
<li>{{hilite | specifically accepted by the '''''RoofStar Guarantee Program''''' (See [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ridge vents must be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated from a compatible metal|| 2021-June-30 }},
<li>{{hilite | acceptable to the metal panel manufacturer|| 2021-June-30 }},
<li>{{hilite | suitable for slopes 1:4 and greater|| 2021-June-30 }}, and
<li>{{hilite | constructed with internal baffles to prohibit the intrusion of|| 2021-June-30 }}
<ol>
<li>{{hilite | insects|| 2021-June-30 }},
<li>{{hilite | vermin|| 2021-June-30 }},
<li>{{hilite | snow|| 2021-June-30 }}, and
<li>{{hilite | debris|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Natural air flow vents must be
<ol>
<li>Type B or C ventilators conforming to CAN3-A93-M82 (R2003), "Natural Airflow Ventilator for Buildings", and permanently marked with the standard number,
<li>tested by an accredited third party to verify compliance with the required Standard,
<li>fabricated from plastic or corrosion-resistant metal (painted or unfinished), and
<li>manufactured with a base flange that measures
<ol>
<li>at least 76.2 mm (3”) wide on the up-slope side of the flashing, or
<li>at least 50.8 mm (2”) along the vertical sides, and along the bottom side of the flashing.
</li></ol>
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |incorporate only the split panel detail for flashing penetrations (use of a flexible boot flashing secured with gasketed screws is not permitted)|| 2022-February-5 }}, and
<li>{{hilite |incorporate no fewer than two storm collars for each penetration flashing that does not include a settlement cap; each collar must be separated from the other by no more than 76.2 mm (3”)|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}====

<ol>
<li>All penetration flashing materials must be new.
<li>All penetrations must be flashed to seal the penetration where it passes through the deck and underlayment and must prevent water ingress at least 203.2 mm (8") above the ''finished system surface''.
<li>{{hilite | Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing|| 2021-June-30 }}
<ol>
<li>{{hilite | must be suitable for the slope and penetration|| 2021-June-30 }}, and
<li>{{hilite | must be properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form or permit a seal || 2023-January-26 }} around the penetration {{hilite | to permit a seal|| 2024-January-31 }}|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All penetration flashings suitable for application on an architectural metal panel ''roof system'' || 2026-February-1 }}
<ol>
<li>{{hilite | must be secured to the metal panel system with mechanical fasteners|| 2026-February-1 }},
<li>{{hilite | shall maintain a drainage space around all sides of at least 12.7 mm (1/2”) and shall not impede the flow of water along a panel|| 2026-February-1 }},
<li>{{hilite | shall be oriented to promote positive drainage, and|| 2026-February-1 }}
<li>{{hilite | shall be sealed to the panel or to split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for split pan requirements) with an acceptable sealant applied to both the underside of a flange and around its edges|| 2026-February-1 }}.
</li></ol>
<li>A flexible boot flashing {{hilite | may be|| 2026-February-1 }} used with cylindrical penetration {{strike| is permissible || 2025-February-1 }}, provided
<ol>
<li>the flexible boot flashing
<ol>
<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
<li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
<li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,
<li>is fastened with gasketed screws spaced no more than 38.1 mm (1-1/2") O.C.,
<li>is secured around the penetration with a stainless-steel clamping ring{{hilite |, but when a clamping ring cannot be installed, the top of the flashing must be protected with a caulked, galvanized storm collar|| 2021-October-30 }}, and
<li>is sealed around the penetration joint with a bead of sealant
</li></ol>
<li>{{hilite | the penetration is fitted with a properly sized and caulked galvanized storm collar|| 2021-June-30 }}, and
<li>{{hilite | the plumbing trade (for new construction only) ensures|| 2021-June-30 }}
<ol>
<li>{{hilite | the flashing is not distorted|| 2021-June-30 }}, and
<li>{{hilite | a storm collar is securely fitted and caulked with sealant|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>{{hilite | Plastic flashings, vents, and related fittings shall not be used on an architectural sheet metal roof|| 2026-February-1 }}.
<li>A cylindrical penetration flashing (i.e., for a pipe)
<ol>
<li>with a maximum opening diameter equal to or less than 152.4 mm (6”) may be installed on a curb, but shall in any case be flashed with a flexible boot flashing, or with a rigid metal pipe flashing.
<li>with a maximum opening diameter greater than 152.4 mm (6”), and all exhaust flues (B-vents), may not be flashed at the ''drainage plane'' and instead must be installed on a curb (see [http://rpm.rcabc.org/index.php?title=ASM_11.2.1_Curb,_Split_Panel ASM 11.2.1 Curb, Split Panel]).
</li></ol>
<li>{{hilite | When a cylindrical penetration extends above the top edge of its flashing so that it cannot be sealed with a settlement cap, the penetration must be fitted with at least one properly fitted, level, galvanized clamping storm collar placed immediately above the top opening of the flashing.|| 2021-June-30 }}
<li>{{hilite | All installed storm collars must be sealed with a continuous, untooled bead of acceptable sealant at least 9.53 mm (3/8”) wide, applied to and centered over the joint between the collar and the penetration|| 2020-July-3 }}.
<li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head), or
<li>a curb waterproofed with sheet membrane and flashed with sheet metal, and fitted with a customized sheet metal hood (shaped to function like a weather head).
</li></ol>
<li>Cables passing through a penetration flashing should be drooped, and horizontal pipes should be fitted with a capillary-breaking collar, to prevent water from tracking along the cable or pipe, into the building; {{hilite | water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | Where a purpose-made flashing does not fit the penetration (i.e., a penetration that is a square post), or when a penetration extends above the top edge of the flashing so that it cannot be enclosed with a cap or protected with a storm collar {{hilite | {{strike| (Ref. Figure 12.3.2.-A)|| 2025-February-1 }}{{hilite | (See '''Figure 12.3.2.1.-A''')|| 2026-February-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}|| 2020-July-3 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of {{hilite |semi-cured EPDM (or its equivalent)|| 2020-July-3 }},
<ol>
<li>{{hilite | loosely wrapped around the penetration and the flashing at least 1-1/2 times, or adhered to itself and overlapped at least 50.8 mm (2") ||2021-February-7 }},
<li>{{hilite | installed free of wrinkles or fish-mouths ||2021-February-7 }},
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>{{hilite | clamped at the top and at the bottom using stainless steel clamps set back from the membrane edge no more than 6.35 mm (1/4") ||2021-February-7 }}, or
</ol></li>
<li>with {{hilite | heat- ||2021-February-7 }}shrink tubing that
<ol>
<li>{{hilite | {{hilite | extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2") ||2021-February-7 }},
<li>is secured with stainless steel mechanical clamps installed at each end of the tubing, and
<li>{{hilite | is caulked with an acceptable sealant (when adhesive-lined heat-shrink tubing is used, the sealant may be omitted). || 2023-October-28 }}
</ol></li>
</ol></li>
<li>{{hilite | Unshielded flexible mechanical ("MJ") couplings || 2024-January-31 }}
<ol>
<li>{{hilite | shall be clamped to the penetration and its flashing, and sealed along the top edge with an acceptable sealant, and || 2024-January-31 }}
<li>{{hilite | are suitable for use only with penetrations that will not expand, contract, or move with anticipated building settlement, i.e., fall protection anchors. || 2024-January-31 }}
</ol></li>
<li>{{hilite | Chimney chase caps that are included in the scope of roofing work|| 2021-October-30 }}
<ol>
<li>{{hilite | shall be fabricated to meet the requirements set out in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]|| 2021-October-30 }},
<li>{{hilite | must be fully supported beneath the flashing|| 2021-October-30 }},
<li>{{hilite | must be waterproofed beneath the cap flashing with a RoofStar-accepted self-adhered eave protection membrane installed according to the membrane manufacturer’s written instructions (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]])|| 2021-October-30 }}, and
<li>{{hilite | shall be sealed at the penetration collars with the waterproofing membrane|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Cylindrical penetrations through chimney chase caps that form part of the roofing work must be fitted with a properly sized galvanized storm collar, caulked with sealant|| 2021-October-30 }}.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.1.-A Alternate Flashing of Pipe Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.1.(14) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.1.3.1-A (B).png | link=https://rpm.rcabc.org/images/4/49/Figure_12.1.3.1-A_%28B%29.png | 400 px]]
|}

====12.3.2.2. Reserved====
====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16}}
<li>{{hilite | Penetrations that are closer together than the allowable minimum distance must be supported by a written Variance issued by the '''''Guarantor'''''. || 2023-June-16 }}
</li></ol>

====12.3.2.4. Curbs and Sleepers====

<ol>
<li>All ''curb'' flashing shall be constructed on a split pan and affixed to the pan with blind rivets.
<li>Split pans must be
<ol>
<li>secured to the roof structure, and to adjacent panels, with cleats that are fashioned from compatible metal and fastened to the structure with screws.
<li>hooked to the cleats, and to adjacent roof panels, shingle fashion with positive laps, and
<li>sealed at each lap with two parallel untooled beads of sealant.
</li></ol>
<li>{{hilite | All curbs or penetrations that can be flashed with sheet membrane shall, regardless of their geometry, be flashed with a high-temperature rated membrane which must positively lap field underlayment, and must be carried|| 2026-February-1 }}
<ol>
<li>{{hilite | at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies)|| 2026-February-1 }},
<li>{{hilite | no higher than the top of a flexible boot penetration|| 2026-February-1 }},
<li>{{hilite | to the top inside edge of curbs, and|| 2026-February-1 }}
<li>{{hilite | onto field by at least 152.4 mm (6”)|| 2026-February-1 }}.
</li></ol>
{{strike| <li>All ''curbs'' must be fully flashed with the same membrane used for eave protection and valleys, and must extend to the top of the ''curb''. || 2025-February-1 }}
<li>Where possible, membrane flashing should extend across the top of the ''curb'' and terminate on the vertical inside face.
<li>{{hilite | Skylights installed on ''curbs'' meeting the minimum height requirements (see [[#12.1.3.4. Curbs and Sleepers | Article 12.1.3.4.]]) must be waterproofed with membrane and flashed with sheet metal in keeping with the requirements for ''curbs''|| 2021-June-30 }}.
<li>{{hilite | Skylights with proprietary ''curbs'', regardless of their height, must be sealed to the ''roof deck'' following the requirements for penetration and vent flashings|| 2021-June-30 }}.
<li>Back pan membrane flashing must extend
<ol>
<li>at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies),
<li>to the top inside edge of ''curbs'',
<li>914.4 mm (36") up the slope from the ''curb'' transition, and
<li>onto the field, past the ''curb'' at least 152.4 mm (6”).
</li></ol>
<li>Back-pan metal flashings for curbs up to 914.4 mm (36”) in width must extend
<ol>
<li>past the edges of a ''curb'' by 101.6 mm (4”) but project no closer to the adjacent seam than 51 mm (2”), and
<li>up the slope beneath the metal panels, to a point at least 150 mm (6”) (when measured vertically) from the base of the ''curb''.
</li></ol>
<li>''Curbs'' with widths 914.4 mm (36”) to 2438.4 mm (96") must be constructed with a metal ''cricket''
<ol>
<li>that is supported by rigid material to prevent metal distortion,
<li>that is integrated with the ''curb'' flashing panels,
<li>that extends up-slope from the back of the ''curb'', beneath the metal panels to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>fabricated with flanges that lap under the metal ''curb'' flashing at least 50.8 mm (2”), and
<li>that is closed at all seams, using
<ol>
<li>welds, or
<li>blind rivets, incorporating two beads/rows of sealant.
</li></ol>
</li></ol>
<li>Waterproofed gutter membranes for ''curbs'' wider than 2438.4 mm (96") must slope toward the eaves at least 2%, and shall
<ol>
<li>extend up the slope at the back of the ''curb'', beneath the metal panels, to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>extend horizontally from the ''curb'' at least 254 mm (10”), to the nearest metal panel upstand,
<li>lap continuously on either side of the ''curb'', and onto the down-slope metal panels, and
<li>extend a minimum of 152.4 mm (6") over the lower metal roof panels, measured from the back pan.
</li></ol>
<li>Fasteners for metal panels installed above the back of the ''curb'' must be placed 101.6 mm (4") or more above the curb base, when measured vertically.
</li></ol>

====12.3.2.5. Air Vents====

<ol>
<li>Air vents
<ol>
<li>{{hilite | shall be installed on a curb, using the split pan method (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements) || 2027-February-1 }},
<li>{{hilite | shall be installed within 609.6 mm (24”) of a ridge, and evenly spaced along the ridgeline, and || 2027-February-1 }}
<li>{{hilite | must be installed on only one side of a ridge or hip line (vents installed on opposite or adjacent sides of a roof plane will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
</li></ol>

{{strike| <ol>
<li>{{hilite |Air vents shall be installed in keeping with the requirements in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]]|| 2021-June-30 }}
</li></ol> || 2026-January-27 }}

====12.3.2.6. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]], and
<ol>
<li>may be used
<ol>
<li>{{hilite | on the ''drainage plane''|| 2021-February-7 }},
<li>where sheet membrane flashing may not be practical or even possible,
<li>{{hilite | to terminate the top edge|| 2021-February-7 }} of sheet membrane flashing,
<li>{{hilite | for sheet membrane reinforcement (i.e., at corners)|| 2021-February-7 }},
<li>{{hilite | where abrasion resistance is desirable|| 2021-February-7 }},
<li>{{hilite | where resistance to contamination of sheet membrane is necessary|| 2021-February-7 }}, or
<li>{{hilite | where the ''Design Authority'' specifies its application. || 2023-June-16 }}
</ol></li>
<li>must be compatible with the primary sheet membrane flashing,
<li>shall be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, all as required by the ''manufacturer'' in their published instructions,
<li>must be applied within masked boundaries to produce clean, straight, plumb edges, and
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece {{hilite | is cut to|| 2021-February-7 }} cover the masked area, to within 3.78 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") (See {{hilite | '''Figure 12.3.2.6.-A''' || 2026-February-1 }}).
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane.
<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing ''system''|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>{{hilite | may be used|| 2021-February-7 }}
<ol>
<li>{{hilite | to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]]|| 2021-February-7 }},
<li>{{hilite | to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes|| 2021-February-7 }}, or
<li>{{hilite | to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]])|| 2021-February-7 }}.
</ol></li>
<li>{{hilite | must not be used in the ''drainage plane'', or to reinforce membranes against abrasion|| 2021-February-7 }},
<li>{{hilite | must be applied in two cured coats, unless otherwise permitted in this Standard|| 2021-February-7 }}, and
<li>{{hilite | must be fleece-reinforced between coats where|| 2021-February-7 }}
<ol>
<li>{{hilite | the application is considered permanent, || 2023-June-16 }}
<li>{{hilite | a change in plane (angle) occurs|| 2021-February-7 }}, or
<li>{{hilite | there is a joint between two supports and the liquid membrane must serve as a bridge|| 2021-February-7 }}.
</ol></li>
</ol></li>
<li>{{hilite | Accessory PMMA detailing products|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>{{hilite | must be|| 2021-October-30 }} reinforced with chopped or loose fibres,
<li>{{hilite | shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted|| 2021-February-7 }},
<li>{{hilite | must be used at locations 101.6 mm (4”) or more above the ''drainage plane''|| 2021-February-7 }}, {{hilite | except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system|| 2021-October-30 }}, and
<li>{{hilite | must not be used where movement is expected|| 2021-February-7 }}.
</ol></li>
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Acceptable Application of 2-Component PMMA Around Roof Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.6.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg | link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of walls must be located at least 88.9 mm (3-1/2") above the ''drainage plane''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''roof assembly'' (i.e., on top of a parapet) shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
</li></ol>

====12.3.2.8. Reserved====

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>{{hilite | ''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counter-flashing (also see the Glossary for a colloquial use of the term). || 2023-June-16 }}
<li>{{hilite | ''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge"). || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the ''Architectural Sheet Metal Manual'' published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>{{hilite | Design drawings must detail metal flashing profiles desired for the ''project''|| 2021-June-30 }}.
<li>{{hilite | Roof materials that are UV-sensitive must be protected with metal flashings|| 2021-June-30 }}.
<li>{{hilite | Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the design specifications for ''linear metal flashing'' shall conform to the design requirements in the applicable ''waterproofing roof system'' Standard|| 2021-June-30 }}.
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 24-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
<li>{{hilite | Except for metal valley flashings (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]), ''linear metal flashings'' may be overlapped rather than seamed; each overlap must be no less than|| 2021-June-30 }}
<ol>
<li>{{hilite | 101.6 mm (4”) when fully caulked in the lap|| 2021-June-30 }}, or
<li>{{hilite | 152.4 mm (6”) when installed without caulking in the lap|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Sealants used in exposed locations must be tooled to positively shed water|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-A Minimum Required Gauge and Length for Pre-finished Galvanized Steel Cap (Coping) Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Horizontal Span !! style="width:50px;" | Minimum Slope !! style="width:50px;" | Gauge !! style="width:150px;" | Maximum Flashing Segment Length !! style="width:200px;" | Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 300 - 900 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 900 mm or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|}
::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-B Minimum Required Gauge and Length for Pre-finished Galvanized Steel Vertical Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Vertical Face !! style="width:50px;" | Gauge !! style="width:175px;" | Segment Length !! style="width:250px;" | Vertical Seam Options
|-
| Up to 152.4 mm (6") || 24 || 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || 3048 mm (120") || Butt Seams*
|}

::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]]).
<li>{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}{{hilite | (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
</li></ol>

====13.1.3.6. Cap and Counter-flashing====

<ol>
<li>{{hilite | Cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the design requirements in the applicable ''waterproofing roof system'' or gutter membrane Standard || 2023-June-16 }}.
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Refer to [[#10.3.7.2. Intersections with Waterproofing Roof | Article 10.3.7.2.]]
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>{{hilite | ''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.|| 2022-February-5 }}
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>{{hilite | When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below|| 2026-July-1 }}.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ''ASTM A653'' / ''A653M-06'' CS Type B, Z275 (G90) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel {{hilite | Grade 304|| 2026-July-1 }}''': {{hilite | minimum 0.38 mm (0.014", 28-gauge)|| 2026-July-1 }} stainless steel, Grade {{strike| Type 302, || 2025-June-3 }} 304, {{strike| 316, 2B finish to ASTM A167-82 || 2025-June-3 }} {{hilite | conforming to ASTM {{strike| A167-82 || 2025-June-3 }} A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet {{hilite | (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2) | {{hilite | Note A-13.2.1.2.(3)(2)]]) || 2026-July-1 }}.
<li>{{hilite | '''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge)) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. || 2026-July-1 }}
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ''ASTM A792''/''A792M-06'' CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Stainless Steel''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Type 302, 304, 316, 2B finish to ''ASTM A167-82''. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ''ASTM B370-81''. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard ''EN 988-1996''. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards.
<li>{{hilite | Where a ''waterproofing system'' adjoins and Architectural Sheet Metal System, ''linear metal flashings'' must be fabricated from 24-gauge steel stock|| 2021-June-30 }}.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>{{hilite | threaded screws, {{hilite | friction-type pins (i.e., for masonry or concrete), plug (inserts), || 2024-January-31 }}or rivets (where permitted), || 2023-October-28 }}
<li>{{hilite | compatible with materials they contact, || 2023-October-28 }}
<li>{{hilite | corrosion-resistant, || 2023-October-28}}
<li>{{hilite | identified in the engineered design, when part of the roof system’s wind resistance calculations (Ref. Article 3.1.3.3., “Resistance to Specified Wind Loads”), || 2023-October-28 }}
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>{{hilite | Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings || 2023-October-28 }}
<ol>
<li>{{hilite | in concealed locations must be at least No. 8 (larger if required by the engineered design), with a low-profile head. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10. (larger if required by the engineered design), shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.|| 2023-October-28 }}
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to any one of the following:
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”.
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”.
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”.
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted otherwise, all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
<li>Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the fabrication of ''linear metal flashing'' shall conform to the requirements in the applicable ''waterproofing roof system'' Standard.
<li>Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break.
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed,
<li>shall conform to the minimum requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }},
<li>shall incorporate seams conforming to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }}, and
<li>may not exceed the maximum length of 3048 mm (120").
</ol></li>
<li>{{hilite |The vertical leg of any metal flashing that overlaps roofing material must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break|| 2021-June-30 }}.
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems''),
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.1.3. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous {{hilite | or butyl-based || 2026-February-1 }} membrane used as eave protection in a ''water-shedding roof system'') (Ref. [[#Section 8.2. Materials | Section 8.2.]]).
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}
<ol>
<li>{{hilite | shall conform to the fasteners requirements in || 2024-January-31 }} [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>{{hilite | shall be firmly fastened, without distorting secured materials, || 2024-January-31 }}
<li>{{hilite | must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate || 2024-January-31 }} {{strike| must penetrate the substrate as specified in [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]], and || 2023-January-26 }}
<ol>
<li>{{hilite | through the back surface of steel framing at least 19.05 mm (3/4"), || 2024-January-31 }}
<li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
<li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
{{strike| <li>Where hidden metal clips are required, they must
<ol>
<li>be at least 24-gauge,
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 76.2 mm (3") from the bottom edge (hook), and
<li>engage drip or safety edges by a minimum of 12.7 mm (1/2").
</li></ol>
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centred between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol> || 2023-January-26 }}
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the roof side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing|| 2022-February-5 }}.
<li>{{hilite | All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article|| 2022-February-5 }}.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ({{hilite | '''Figure 13.3.2.2.-A''' || 2026-February-1 }}) or S-lock ({{hilite | '''Figure 13.3.2.S.-B''' || 2026-February-1 }} (Single) and {{hilite | '''Figure 13.3.2.S.-C''' || 2026-February-1 }} (Double)), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }},
<li>{{hilite | continuous eave flashing to which the metal panels are secured || 2023-June-16 }}, or
<li>{{hilite | the vertical face of any flashing that is concealed by a ''wall assembly'', counter-flashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap|| 2021-October-30 }}
<ol>
<li>{{hilite | is no less than 101.6 mm (4”) when fully caulked in the lap|| 2021-October-30 }}, or
<li>{{hilite | is no less than 152.4 mm (6”) when installed without caulking in the lap.|| 2021-October-30 }}
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (closed with a "rat tail").
<li>When the face of vertically-oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically-oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See {{hilite | '''Figure 13.2.2.2.-A''' || 2026-February-1 }}) must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>
<li>'''S-locked seams''' ({{hilite | '''Figures 13.2.2.2.-B''' || 2026-February-1 }} and {{hilite | '''13.2.2.2.-C''' || 2026-February-1 }}) must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
<li>'''Flat butt seams'''
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
<li>The saddle for flat butt seams must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-A''' '''Mechanical Locking Standing Seam''' Forming Part of Sentence 13.2.2.2.(11) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-B''' '''Single S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-C''' '''Double S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]] || [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 300 px]] || [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]]
|}

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | The installation of cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the application requirements in the applicable ''waterproofing roof system'' Standard || 2023-June-16 }}.
</li></ol>

<hr>
<div id=PART_14></div>

={{hilite | Part 14 - The Roof as a Platform || 2023-June-16}}=
==Section 14.1. Design==
===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. {{strike| Definitions || 2024-December-23 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. RoofStar 15-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any covering, amenity space, structure or live loads superimposed upon the ''roof system''.
</li></ol>

====14.1.3.3. Securement of Supported Structures and Equipment====

<ol>
<li>The ''Design Authority'' is responsible to specify the appropriate securement design of roof coverings, structures, and equipment, to resist ''Specified Wind Loads''.
<li>Where structural securement is desirable or required, the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12,"Penetrations and Curbs"]], and [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]).
</li></ol>

====14.1.3.4. Snow Guards====

<ol>
<li>While snow guards are not part of the ''roof system'', snow guards
<ol>
<li>must not penetrate the metal ''roof system'', and
<li>shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>The decision to use snow guards, and their selection, is the responsibility of the ''Design Authority'' and neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the roof ''system'' caused by the use or absence of snow guards.
</li></ol>

====14.1.3.5. Photovoltaic Panels====

<ol>
<li>Photovoltaic panels are considered "equipment" within the definitions used in this Standard, are not part of the ''roof system'', and therefore photovoltaic panels
<ol>
<li>must not penetrate the metal ''roof system'', and
shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>All electrical connections, distribution cables, and related systems that penetrate the ''roof system'' must be flashed with purpose-made flashings incorporating weather-head fittings (see [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]; see also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., ''Electrical Cables and Boxes'']]).
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to ASM Standard | Notes to Standard]]=

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[[RCABC Roofing Practices Manual | Home]]
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(Draft) ASM Roof Systems Standard

2026-06-22T22:05:44Z

James Klassen: /* 2.1.3.1. General Requirements for Roof Slope */

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<big><big>Division B - Standards</big></big> 
<big>Water-shedding Roof Systems: Metals</big> 
<hr>
<big><big><big><big><big>RGC Standard for Architectural Sheet Metal (ASM) Roofs</big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
{{hilite | This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for Architectural Metal Roofing (Tab 8). It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''', '''''RoofStar 10-Year Guarantee''''' or '''''RoofStar 15-year Guarantee'''''. Requirements to qualify for a '''''RoofStar 15-Year Guarantee''''' are listed in each relevant Part under Section 1. All '''''RoofStar 15-Year Guarantee''''' requirements must be read together with the General Requirements for each Part in this Standard. || 2020-July-3 }}

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. {{hilite |Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.|| 2021-February-7 }}

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the {{hilite | hyperlinks embedded || 2020-July-3 }} in the body of text.

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:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Roof Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Eave, Valley, and Field Underlayment]]
|-
| [[#PART_9 | Part 9 - Roof Field (Panel Systems)]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - The Roof as a Platform]]
|-
| <hr>
|-
| [[Notes to ASM Standard | Notes to Standard]]
|-
|}

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<div style="text-align:center">
'''First Edition''': June 14, 2018
 '''Previous Edition''': June 12, 2025
 '''Current Edition''': Adopted January 20, 2026
 
All changes to this Standard are effective <big>'''February 1, 2026'''</big>
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<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>{{hilite | ''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''|| 2027-June-11 }}.
{{strike| {{hilite |''Finished roof system surface''|| 2020-February-3 }} {{hilite | means the top surface of any ''roof system'', inclusive of ballast or ''overburden''|| 2021-February-7 }}. || 2026-June-11 }}
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>{{hilite | ''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''|| 2027-June-11 }}.
{{strike| {{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.|| 2026-June-11 }}
<li>{{hilite | ''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''. || 2023-June-16 }}
<li>{{hilite | ''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy || 2025-October-25 }}.
<li>{{hilite | ''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure|| 2027-June-11 }}.
{{strike| ''Waterproofing roof system'' means an insulated or uninsulated ''roof system'', designed and constructed on roofs using a sheet or liquid-applied membrane, to exclude water. This type of ''system'' typically is installed on roof slopes less than 1:4 (3” in 12”). || 2026-June-11 }}
<li>''Water-shedding roof system'' means an insulated or uninsulated ''roof system'', designed and constructed to shed water away from a structure, not to waterproof it. This type of ''system'' typically is installed on roof slopes greater than 1:4 (3” in 12”) but may be installed on slopes as low as 1:6 (2" in 12").
</li></ol>
</li></ol>

===={{hilite | 1.1.1.5. Reserved || 2026-February-1 }}====

===={{hilite | 1.1.1.6. Objectives || 2026-February-1 }}====

<ol>
<li>Every ''roof system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.7. Responsibility for Design || 2026-February-1 }}====

<ol>
<li>Each design of a ''roof system'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.8. Pre-Design Requirements || 2026-February-1 }}====
<ol>
<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''roof assembly''.
<li>{{hilite | When any element of a ''roof system'' for a pre-fabricated building or building assembly is or will be installed off site , the ''Design Authority'' must consult with the '''''RGC''''' directly concerning '''''RoofStar Guarantee''''' coverage and wind load design (for further reference, see || 2027-February-1 }} [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee {{hilite | Article 3.2.1.2. || 2027-January-16 }}] {{hilite | in Division A of the ''Manual'' || 2027-February-1 }}.
</li></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2026-February-1 }}====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''roof assembly'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and the roof class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''roof assembly'',
<li>the potential effects of reflected heat on the ''roof assembly'',
<li>''roof system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>{{hilite | In addition to Sentence (1), all ''projects'' shall comply with || 2024-October-20 }}
<ol>
<li>{{hilite | the ''project'' specifications and drawings, and || 2024-October-20 }}
<li>{{hilite | the ''manufacturer's'' published installation requirements || 2024-October-20 }}.
</li></ol>
</li></ol>

====1.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>{{hilite | To qualify for a '''''RoofStar 15-year Guarantee''''', each ''project'' must be designed and constructed in compliance with the requirements published in this Standard, including the following standards which are linked to their referenced Parts || 2022-February-5 }}:
<ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is mandatory ([[#2.1.2.2. RoofStar 15-Year Guarantee |Article 2.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | Only panels with a hidden clip securement system may be used to qualify for a '''''RoofStar 15-year Guarantee'''''. Flange-fastened panels are not permitted ([[#9.1.2.2. RoofStar 15-Year Guarantee |Article 9.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | All penetrations must be flashed by using the split panel detail; flexible boot flashings secured with gasketed screws are not permitted ([[#12.1.2.2. RoofStar 15-Year Guarantee |Article 12.1.2.2.]])|| 2022-February-5 }}.
<li>{{hilite | All penetration flashings that do not incorporate a settlement cap must be fitted with two storm collars separated by no more than 75 mm (3”), and each storm collar must be sealed with an untooled bead of sealant [[#12.1.2.2. RoofStar 15-Year Guarantee | Article 12.1.2.2.]]|| 2022-February-5 }}
</li></ol>
</li></ol>

===={{hilite | 1.1.2.3. Quality Control || 2026-February-1 }}====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''roof assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for projects further away than 100 km),
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

===={{hilite | 1.1.2.4. Quality Assurance || 2026-February-1 }}====
(See [[Notes to ASM Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2026-February-1 }}]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''roof system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of roofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Roof Systems====
(See [[Notes to ASM Standard#A-1.1.3.1.| Note A-1.1.3.1.]])

<ol>
<li>{{hilite | This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as || 2023-June-16 }}
<ol>
<li>{{hilite | uninsulated ''systems'' in which metal panels are secured directly to the ''roof deck'' or an overlay, and || 2023-June-16 }}
<li>{{hilite | insulated ''systems'', in which metal panels are installed above insulation and other roof system materials, and|| 2023-June-16 }} {{hilite | should be secured to the ''roof deck'' using means and methods that reduce thermal bridging (e.g., thermally non-conductive clips, girts, or bearing plates) || 2027-February-1 }}{{hilite | (See|| 2027-February-1 }}[[#7.1.3.4. Thermal Resistance and Layering |{{hilite | Article 7.1.3.4., ||2027-February-1 }}]]{{hilite |Sentence (4) and|| 2027-February-1 }}[[Notes to ASM Standard#A-1.1.3.1.|{{hilite | Note A-7.1.3.4.)|| 2027-February-1 }}]].
</li></ol>
<li>Architectural metal roofing systems accepted for use in the '''''RoofStar Guarantee Program''''' must be roll-formed hydrokinetic (water-shedding) systems commonly installed over solid roof ''decks'' or rigid insulation panels, but may also be intermittently supported when engineered to resist anticipated live loads (metal panels designed for use as structural (spanning member) systems are accepted for a '''''RoofStar Guarantee''''' only as an architectural metal panel system).
</li></ol>

===={{hilite | 1.1.3.2. Accessibility for Maintenance || 2026-February-1 }}====

<ol>
<li><div class="recommended">All roofs with a field elevation greater than 7620 mm (25’) above grade should incorporate access to the roof by stairs and a doorway, or with a properly located roof hatch.
<li>Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, in a manner consistent with worker safety regulations, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations''.
</li></ol>

===={{hilite | 1.1.3.3. || 2026-February-1 }} Snow Loads====

<ol>
<li>In this Standard, a ''high snow load area'' is considered a regional area with a ''Specified Snow Load'' higher than 3.5 kPa (See [[Notes to ASM Standard#A-1.1.3.2.| Note A-1.1.3.2.]]).
<li>Roofs subject to high snow loads must be designed with a supporting deck structure thick enough to support the anticipated live loads, within the acceptable deflection limits defined by the "British Columbia Building Code".
<li>{{hilite | In locations where moderate to heavy snow cover or high snow load conditions are possible or expected, the ''Design Authority'' should give consideration to || 2026-February-1 }} {{strike| Consideration should be given to || 2025-February-1 }}
<ol>
<li>slope,
<li>entrances and exits,
<li>penetrations,
<li>valley construction,
<li>proper intake and exit ventilation, irrespective of snow cover and drifting, and
<li>penetrations and their functionality.
</li></ol>
<li>{{strike| Roofs subject to high snow loads should be designed || 2025-February-1 }}{{hilite | Where snow fences or guards are required by the ''Design Authority'', they should be utilized only where a hazard to the public or property exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid panel distortion and damage to the ''roof system'' || 2026-February-1 }}.
{{strike| <ol>
<li>with full support for metal panels,
<li>with generous slope to shed snow from the roof surface (a slope of at least 1:1.5 (8” in 12”) is strongly recommended),
<li>to utilize a RoofStar-accepted self-adhered eave protection membrane as underlayment over the entire deck surface, regardless of slope and the requirements published elsewhere in this Standard,
<li>with widening valleys (from peak to eave),
<li>so that penetrations are located near the ridge line, and
<li>to utilize snow fences or guards (if so required by the ''Design Authority'') only where a hazard to the public exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid disfigurement and damage to the roof system.
</li></ol> || 2025-February-1 }}
</li></ol>

===={{hilite | 1.1.3.4. || 2026-February-1 }} Ventilation====

<ol>
<li>{{hilite | Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | {{hilite | While the || 2027-February-1 }} design and selection of the ventilation system is the responsibility of the ''Design Authority'',|| 2021-June-30 }} attic ventilation
<ol>
<li>{{hilite | must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, Article 9.19.1.1., "Venting")|| 2027-February-1 }},
<li>{{hilite | must should promote proper convection, drawing cool air from the lowest point in and exhausting warm air out near the ridge, and || 2027-February-1 }}
<li>{{hilite | shall be designed so that exhaust vents are located on only one side of a ridge or hip line, within 609.6 mm (24”) of a ridge, evenly spaced along the ridgeline (vents installed on opposite or adjacent sides of a roof plane, or staggered across the plane of drainage, will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Tall exhaust vents are recommended in regions where snow cover is common || 2027-February-1 }}.
<li>Attic ventilation {{hilite |may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents|| 2021-June-30 }},
<li>{{hilite | gable end vents|| 2021-June-30 }} {{hilite | (for exhaust only)|| 2027-February-1 }},
<li>{{hilite | {{strike| hip || 2026-January-16 }} {{hilite | powered or turbine exhaust || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | static {{hilite | (passive) || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | ridge {{hilite | and hip || 2027-February-1 }} vents|| 2021-June-30 }}, or
<li>{{hilite | cupolas|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"])|| 2021-June-30 }}.
<li>{{hilite | Ventilation must be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite | the slope of the roof|| 2021-June-30 }},
<li>{{hilite | the vented area|| 2021-June-30 }}, and
<li>{{hilite | the design and configuration of the roof structure|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ventilation must be provided for|| 2021-June-30 }}
<ol>
<li>{{hilite | roofs over cathedral ceilings|| 2021-June-30 }}, and
<li>{{hilite | compact insulated roof assemblies|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | {{hilite | are {{strike| acceptable and are || 2026-January-16 }} recommended for all areas with vaulted ceilings|| 2021-June-30}}|| 2027-February-1 }}, and
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Vents shall conform to the material and product requirements in || 2027-February-1 }} [[#12.2.1.4. Air Vents | {{hilite | Article 12.2.1.4.|| 2027-February-1 }}]] {{hilite |and must be selected for their ability to resist intrusion by insects, vermin, wind-driven debris, rain, or snow; leaks attributed to roof vents are not covered by a '''''RoofStar Guarantee'''''|| 2027-February-1 }}.
</li></ol>

====1.1.3.5. Hot Works====
(See [[Notes to ASM Standard#A-1.1.3.5.| Note A-1.1.3.5.]])

<ol>
<li>{{hilite | The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]) || 2021-February-7 }}.
<li>{{hilite | When the ''project'' involves Hot Work, the ''Design Authority'' must either || 2021-February-7 }}
<ol>
<li>{{hilite |pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire sensitive by the ''Contractor'' as part of the risk assessment process || 2021-February-7 }}, or
<li>{{hilite | provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project'' || 2021-February-7 }}.
</li></ol>
</li></ol>

===={{hilite | 1.1.3.6. Variances || 2021-June-30 }}====

<ol>
<li>{{hilite | When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must|| 2021-June-30 }}
<ol>
<li>{{hilite | identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned)|| 2021-June-30 }},
<li>identify the ''Contractor'' (if awarded),
<li>{{hilite | articulate the nature of the design problem|| 2021-June-30 }},
<li>{{hilite | identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")), || 2023-June-16 }}
<li>{{hilite | cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.)|| 2021-June-30 }}, and
<li>provide design drawings, photographs, and roof plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>{{hilite |Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''|| 2021-June-30 }}.
<li>{{hilite |A Variance may be unrestricted in its scope, or it may include one or more conditions, or a restriction in coverage, that will affect the design and construction of the ''project'', to accommodate the varied standard, but this is at the discretion of the '''''Guarantor'''''|| 2021-June-30 }}.
<li>{{hilite |Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm|| 2021-June-30 }}.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)

(See [[Notes to ASM Standard#A-1.1.4.| Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>
</li></ol>

====1.1.4.2. Complete Roof System Replacement====

<ol>
<li>Complete roof system replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Roof system'' replacement means the complete removal and replacement of all ''roof system'' and metal flashing materials, exclusive of the air or vapour ''control layers'', and only new replacement materials shall be installed.
<li>Subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]], the decision to reuse and repair an existing air or vapour ''control layer'' remains the responsibility of the ''Design Authority''.
<li>''Roof system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Reserved====

====1.1.4.4. Reserved====

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a ''control joint'' securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If ''project'' conditions do not allow for a curb joint, the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (See [[#1.1.3.6._Variances |Article 1.1.3.6.]]); any alternative design must
<ol>
<li>include design specifications and construction details showing a positive water cut-off that fully isolates the existing roof from the new roof, and
<li>show how the new ''roof system'' will be easily distinguishable from the existing roof system.
</li></ol>
<li>{{hilite | Repairs or renovations to an existing ''roof system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''roof system''). || 2023-June-16 }}
<li>{{hilite | Modifications or additions to a guaranteed roof are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''. || 2023-June-16 }}
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: {{hilite | Contractor Requirements || 2021-February-7 }}====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====
(See [[Notes to ASM Standard#A-1.3.3.2. | Note A-1.3.3.2.]])

<ol>
<li>{{hilite | The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of {{hilite |the ''project''||2022-February-5 }}.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible to make a permanent seal or install overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]].) || 2021-February-7 }}.
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision, manufacturing, and installation of a RoofStar-guaranteed ''Architectural Sheet Metal Roof System'' shall be undertaken only by established employees of ''Contractors'', each having obtained a valid
<ol>
<li>Architectural Sheet Metal Journeyperson Certificate of Qualification, or
<li>Sheet Metal trade ticket, together with at least five (5) years of documented experience installing and supervising the installation of ASM roofing (ref. RCABC Policy A-248).
</li></ol>
</li></ol>

====1.3.2.4. {{hilite | Contractor Submittals || 2026-February-1 }}====
(See also [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] {{strike| and [[#9.2.1.2. Roll Forming Machines and Mill Certificate | Article 9.2.1.2.]] || 2025-February-1 }})

<ol>
<li>{{strike| {{hilite | To qualify for a '''''RoofStar Guarantee''''', the ''Design Authority'' must || 2023-June-16 }} || 2022-October-28 }}{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'' sealed engineered shop drawings conforming to the requirements in || 2023-October-28 }} [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | and || 2023-October-28 }} [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>{{hilite | When tall clips are used as an alternative to EPDM pads (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]), {{hilite | the ''Contractor'' must provide the '''''Guarantor''''' with stamped, written assurance from the ''Design Authority'' that || 2024-January-31 }}
<ol>
<li>{{hilite | the clips will adequately secure and support the elevated panels, and || 2024-January-31 }}
<li>{{hilite | the panels are suitable as spanning members, and will support anticipated live loads, including loads during construction. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The ''Contractor'' is responsible for providing to the '''''Guarantor''''' a copy of the mill certificate for the sheet metal used to form metal panels and related flashings (the certificate may be provided directly, or shown to the observer who shall take a photographic record of the certificate for the '''''Guarantor''''' || 2026-February-1 }} (See [[#9.2.1.2. Roll Forming Machines and Mill Certificate | {{hilite | Article 9.2.1.2. || 2026-February-1 }}]]).
{{strike| <ol>
<li>{{hilite | document the wind resistant design on a Schedule S form (Specialty engineering; see the "British Columbia Building Code", current edition), and || 2023-June-16 }}
<li>{{hilite | submit the Scheduled S form to the '''''Guarantor''''' as part of the ''project'' record. || 2023-June-16 }}
</li></ol> || 2022-October-28 }}
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>

====1.3.3.2. Complete Roof System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.3. Partial Roof Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.4. Reserved====

====1.3.3.5. Tie-ins and Additions to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a curb joint securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of curb joints, the new roof system must be fully isolated from the existing roof system with a positive water cut-off that renders the new roof system easily distinguishable from the existing ''roof system''.
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>{{hilite | When a ''roof system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation) || 2023-June-16 }}
<ol>
<li>{{hilite | the securement of new materials || 2023-June-16 }} ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>{{hilite | deck or wall overlays || 2023-June-16 }} ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>{{hilite | continuity of air and vapour controls || 2023-June-16 }} ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>{{hilite | thermal resistance || 2023-June-16 }} ([[#Part 7 - Insulation | Part 7]],
<li>{{hilite | eaves, valleys, and underlayment || 2023-June-16 }} ([[#PART 8 - Eave, Valley, and Field Underlayment | Part 8]]),
<li>{{hilite | metal panels || 2023-June-16 }} ([[#Part 9 - Roof Field (Panel Systems) | Part 9]]),
<li>{{hilite | perimeter details || 2023-June-16 }} ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>{{hilite | drains || 2023-June-16 }} ([[#Part 11 - Drainage | Part 11]]),
<li>{{hilite | penetrations and curbs || 2023-June-16 }} ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>{{hilite | linear metal flashings || 2023-June-16 }} ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>{{hilite | Modifications to an existing ''roof system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', drains, or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated. || 2023-June-16 }}
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to ASM Standard#A-2 | Note A-2]])
<div id="DECK_CONDITION"></div>

=={{hilite | Section 2.1. Design || 2021-June-30 }}==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====
({{hilite | See '''Figure 2.1.1.2.-A''' || 2026-February-1 }})

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a roof with a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>{{hilite | ''Deck overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials|| 2021-June-30 }}.
<li>''Extreme Slope'' means a roof with a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' (roof) means a roof with a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>{{hilite | ''Sheathing'' means a rigid panel material secured directly onto framing. || 2024-January-31 }}
<li>''Steep Slope'' means a roof with a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>{{hilite | ''Supporting deck'' ("deck")|| 2021-June-30 }} {{hilite | means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'')|| 2021-June-30 }}.
<li>{{hilite | ''Wall''|| 2021-June-30 }} {{hilite | means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions")|| 2021-June-30 }}.
<li>{{hilite | ''Wall overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials|| 2021-June-30 }}.
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2026-February-1 }} {{hilite | Forming Part of Article 2.1.1.2. || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 450 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed with a minimum slope of 1:6 (2” in 12”), which may not be reduced through a written Variance {{hilite | (Note: curved or barrel-shaped roofs may be permitted under a written Variance, subject to a review by the '''''Guarantor'''''). || 2023-June-16 }}
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a roof to achieve proper drainage{{hilite |, taking into consideration|| 2027-June-11 }} {{strike| and must take into consideration || 2026-June-11 }}
<ol>
<li>the anticipated deflection and settlement of the structure, which may interfere with drainage{{hilite | , and || 2027-June-11 }}
<li>{{hilite | the limitations of panel seams (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2027-June-11 }}.
</li></ol>
{{strike| <li>Throughout this Standard, the defined terms of [[#2.1.1.2. Defined Terms | Article 2.1.1.2.]] apply (See '''Figure 2.1.1.2.-A''' for an illustrated guide to the above definitions). || 2025-February-1 }}
<li>Roofs with designed slopes less than the stated minimums in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.3.]] (i.e., curved applications; see also [[#9.1.3.4. Curved Panel Systems | Article 9.1.3.4.]]) will be considered for a '''''RoofStar Guarantee''''' provided
<ol>
<li>the design and installation details are submitted in writing to the '''''Guarantor''''' prior to the tendering of documents, and
<li>a written Variance is issued by the '''''Guarantor''''' prior to close of tender.
</li></ol>
</li></ol>

====2.1.3.2. Roof Slope for New Construction====

<ol>
<li>Roofs with a designed slope
<ol>
<li>equal to or greater than 1:6 (2" in 12") do not require a written Variance from the '''''Guarantor''''' and must be designed to conform to the requirements in this Standard, howsoever they apply,
<li>less than 1:6 (2" in 12")
<ol>
<li>are permissible only through a written Variance from the '''''Guarantor''''',
<li>shall be designed to conform to the requirements in this Standard, and
<li>shall comply with any and all requirements or conditions stipulated in the Variance.
</li></ol>
</li></ol>
<li>When the designed slope is less than 1:4 (3" in 12"), the engineered shop drawing package must be accompanied by manufacturer’s literature confirming that this application is acceptable.
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is a requirement for a '''''RoofStar 15-year Guarantee''''' (See [[#2.1.2.2. RoofStar 15-Year Guarantee | Article 2.1.2.2.]]).|| 2022-February-5 }}
</li></ol>

====2.1.3.3. Roof Slope for Replacement Roofing====

<ol>
<li>{{hilite | The requirements in || 2023-June-16 }} [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]] {{hilite | and || 2023-June-16 }} [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] {{hilite | apply to replacement roofing. || 2023-June-16 }}
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Roofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''roof system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.1.| Note A-2.1.5.1.]])

<ol>
<li>Steel ''decks'' must be acceptable to the roof system manufacturer and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
</li></ol>

====2.1.5.2. Concrete Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Direct contact between metal roofing and concrete, light concrete, stone and mortar '''must be avoided'''.
<li>The selection of a suitable underlay, insulation, and method of attachment to a concrete ''deck'' or ''wall'' is the responsibility of the ''Design Authority''.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.3.| Note A-2.1.5.3.]])

<ol>
<li>Wood decks
<ol>
<li>must conform to the material requirements of the Code (see "British Columbia Building Code", Division B, Part 9, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s923 Article 9.23.16.2.. "Material Standards"]),
<li>shall be free of loose knots or cracks,
<li>{{hilite | shall have a moisture content acceptable to the ''manufacturer'' (for self-adhered or adhered membranes, moisture content shall not exceed 19%; Ref. Canadian Wood Council, || 2023-October-28 }} [https://cwc.ca/en/why-build-with-wood/durability/durability-hazards/moisture-and-wood/ "Moisture and Wood"]), and
<li>{{hilite |shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction || 2021-February-7 }}; specifying the structural suitability of fasteners is the responsibility of the ''Design Authority''.
</li></ol>
<li>Differential edge movements or deflection exceeding 1/360 of the span must be prevented
<ol>
<li>by constructing the ''deck'' with tongue-and-groove plywood, and supporting the non-grooved edges with joists or solid blocking, or
<li>by supporting butt joints at unsupported edges with solid blocking.
</li></ol>
<li>All wood decks shall be
<ol>
<li>at least 15.88 mm (5/8") thick, and
<li>capable of the required pull-out resistance for expected fasteners (knotholes and cracks in decks shall be considered defects and must be covered with sheet metal, mechanically fastened in place),
</li></ol>
<li>{{hilite | All mass timber or wood board ''decks'' must be covered with a properly secured, suitable overlay to || 2021-February-7 }}
<ol>
<li>ensure the integrity of the underlayment as mass timber elements contract and expand, and
<li>{{hilite | protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2021-February-7 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li>All types of wood ''decks'' should be roofed promptly after installation.
</li></ol>

====2.1.5.4. Plywood Roof Decks====

<ol>
<li>Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to ASM Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All non-ferrous (i.e. copper, zinc) metal panel roof systems must be installed over tongue-and-groove plywood decks conforming to the minimum material properties and thicknesses stated in this Article.
<li>{{hilite | All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see || 2023-June-16 }} [[#2.1.5.5. Mass Timber Roof Decks | Article 2.1.5.5.]], [[#2.1.5.6. Non-veneered Panel Roof Decks | Article 2.1.5.6.]], and [[#2.1.5.7. Wood Board Roof Decks | Article 2.1.5.7.]]) {{hilite | shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be || 2023-June-16 }}
<ol>
<li>{{hilite | at least 15.88 mm (5/8") thick, unless exceeded by the specified securement design || 2023-June-16 }} (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>{{hilite | free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place, || 2023-June-16 }}
<li>{{hilite | securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing, || 2023-June-16 }}
<li>{{hilite | properly gapped between panels, and || 2023-June-16 }}
<li>{{hilite | fully supported along all panel edges. || 2023-June-16 }}
</li></ol>
</li></ol>

====2.1.5.5. Mass Timber Roof Decks====

<ol>
<li>{{hilite | Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated timbers (Glulam), are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in || 2023-June-16 }} [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
</li></ol>

====2.1.5.6. Non-veneered Panel Roof Decks====

<ol>
<li>{{hilite | Oriented Strand Board (OSB) is not acceptable deck material for Architectural Sheet Metal panel ''roof systems'' || 2023-June-16 }}.
</li></ol>

====2.1.5.7. Wood Board Roof Decks====

<ol>
<li>Wood board ''decks''
<ol>
<li>must be overlaid with plywood in keeping with the general requirements for wood ''decks'' in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
<li>{{hilite | must be removed and replaced with new material when they are damaged or excessively cupped (excessive cupping is considered 25.4 mm (1”) or more when measured against the mid-span deflection of the ''deck''). || 2023-June-16 }}
</li></ol>
</li></ol>

==={{hilite | 2.1.6. Reserved || 2024-October-20 }}===

===2.1.7. Walls===
(See [[Notes to ASM Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====

<ol>
<li>{{hilite | ''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials|| 2021-June-30 }}.
<li>{{hilite | Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings|| 2021-June-30 }}; {{hilite | when sheathing is unsuitable, it must be overlaid with an accepted wall overlay. || 2024-January-31 }}
<li>{{hilite | ''Sheathing''{{strike| , defined as a rigid panel material secured directly onto framing, || 2023-January-26 }} is considered a wall surface for the purpose of this Standard|| 2021-June-18 }}.
<li>{{hilite | ''Wall'' surfaces {{hilite | suitable for || 2024-January-31 }} receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the|| 2021-June-18 }} ''finished system surface'' {{hilite | (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]])|| 2021-June-18 }}.
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to ASM Standard#A-2.1.8.| Note A-2.1.8.]] concerning electrical systems, fire and shock hazards, and Rule 12-022 of the Canadian Electrical Code, Part I)

====2.1.8.1. New Construction====

<ol>
<li>Electrical cables, raceways or boxes shall not be installed within a ''roof assembly'' {{hilite | ({{hilite | '''Figure 2.1.8.1.-A''' || 2026-February-1 }})|| 2021-February-7 }}.
<li>Electrical cables, raceways or boxes shall not be installed on the underside of a ''roof assembly'', unless
<ol>
<li>the ''supporting deck'' structure equals or exceeds 76.2 mm (3”) in thickness {{hilite | ({{hilite | '''Figure 2.1.8.1.-B''' || 2026-February-1 }})|| 2021-February-7 }}, or
<li>the cables, raceways or boxes are installed and supported so there is a separation of not less than 38.1 mm (1-1/2") measured between the underside of the ''roof assembly'' and the electrical installation {{hilite | ({{hilite | '''Figure 2.1.8.1.-C''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
<li>Notwithstanding either (1) and (2), cables or raceways shall be permitted to pass through a ''roof assembly'' for connection to electrical equipment installed on the roof, provided that the passage through the roof is a part of the ''roof assembly'' design.
<li>{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing|| 2021-February-7 }} {{hilite | ({{hilite | '''Figure 2.1.8.1.-D''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A''' '''Prohibited Installation of Electrical Conduit''' Forming Part of Sentence 2.1.8.1.(1)|| 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B''' '''Roof Decks and Electrical Conduit Installation''' Forming Part of Clause 2.1.8.1.(2)(1) || 2026-February-1 }}(Click to expand)
|-
| [[File:Figure 2.1.8.1.-A (Electrical).jpg | link=https://rpm.rcabc.org/images/f/f5/Figure_2.1.8.1.-A_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-B (Electrical).jpg | link=https://rpm.rcabc.org/images/3/32/Figure_2.1.8.1.-B_%28Electrical%29.jpg | 350 px]]
|}
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-C''' '''Minimum Separation Between Roof Assembly and Electrical Conduit''' Forming Part of Clause 2.1.8.1.(2)(2) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D''' '''Electrical Conduit Elevated Above Roof Assembly''' Forming Part of Sentence 2.1.8.1.(4) || 2026-February-1 }} (Click to expand)
|-
| [[File:Figure 2.1.8.1.-C (Electrical).jpg | link=https://rpm.rcabc.org/images/d/db/Figure_2.1.8.1.-C_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-D (Electrical).jpg | link=https://rpm.rcabc.org/images/e/ef/Figure_2.1.8.1.-D_%28Electrical%29.jpg | 350 px]]
|}

<div class="col-md-12">
 
</div>

====2.1.8.2. Roof Replacement and Alterations====

<ol>
<li>If existing electrical cables or boxes do not conform to the requirements in [[#2.1.8.1. New Construction | Article 2.1.8.1.]], the ''Design Authority'' must consider the attachment of the ''roof system'' above the electrical system, and the requirements set out in [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]].
<li>The ''Design Authority'' should
<ol>
<li>specify protection of existing electrical cables and boxes (a 4.76 mm (3/16”) steel plate may be used to minimize the possibility of fastener penetration and cutter damage, {{hilite | but protection plates may interfere with mechanical fasteners used to secure the ''roof system'' against wind uplift, even for future replacement roofing)|| 2021-February-7 }}, and
<li>provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes.
</li></ol>
</li></ol>

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) {{hilite | (These panels are specifically {{hilite | designed to receive roof membranes|| 2021-June-30 }} and may be installed horizontally or vertically)|| 2021-June-30 }}.
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), or
<li>{{hilite | plywood, having a minimum thickness of 12.7 mm (1/2”)|| 2021-June-30 }}.
</li></ol>
<li>Where wall sheathing is unsuitable to receive roofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be constructed with a minimum slope of 1:6 (2” in 12”).
</li></ol>
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of deck and wall structures, and their suitability for the application of roofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Roof Assembly=
==Section 3.1. Design==
===3.1.1. General===
===={{hilite | 3.1.1.1. Scope || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>This Part applies to all new roofs, and to both full and partial replacement ''roof systems''.
<li>This Part sets out the requirements for
<ol>
<li>roofs that support ''overburden'', or fixed amenities and equipment, and
<li>roofs where only part of the ''system'' must be replaced.
</li></ol>
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.2. | Note A-3.1.1.2.]])

<ol>
<li>The requirements in this Part intend to support and conform to or exceed the Building Code.
</li></ol>

===={{hilite | 3.1.1.3. Limit of Liability under RoofStar Guarantee || 2023-June-16 }}====

<ol>
<li>{{hilite |Notwithstanding [[#3.1.1.2. Intent | Article 3.1.1.2.]], the materials presented herein are based on an interpretation of the Code and are not the Code itself; therefore, the reader is responsible to exercise good judgement, and to read, understand and comply with the Code, as and how it applies to the reader’s particular ''project'' and its design requirements.
<li>Where the Code can be shown to exceed the requirements, guiding principles, and recommendations of this Part or any related Part in this Standard, the Code shall prevail|| 2021-October-30 }}.
<li>{{hilite |Compliance with this Part or the Code does not guarantee that a roof will not succumb to forces exerted by wind, and therefore neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, a roof system caused by wind; too many variables beyond the control of this Standard affect the wind resistance performance of a ''roof system'', including (without limitation)|| 2021-October-30 }}
<ol>
<li>{{hilite | the ''continuity'' or discontinuity of air and vapour ''control layers'' of the entire building enclosure|| 2021-October-30 }},
<li>{{hilite | openings in the building (windows and doors, which are often occupant-controlled and not static)|| 2021-October-30 }}, and
<li>{{hilite | wind strength, which may exceed the codified numeric wind speed values used to calculate wind resistance for the ''roof system'' || 2021-October-30 }} (Ref. "British Columbia Building Code 2024", Division B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=762 Appendix C, "Table C-1"]).
</li></ol>
</li></ol>

===={{hilite | 3.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }} || 2023-June-16 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Registered Professional'' has the same meaning as that used in the "British Columbia Building Code 2024", Division C, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"].
<li>''Specified Wind Load'' means the calculated force of wind exerted on the roof of a specific building, according to the requirements in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=496 Section 4.1., "Structural Loads and Procedures"].
</li></ol>
</li></ol>

===3.1.2. Guarantee Term Requirements===
====3.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===3.1.3. All Systems===
===={{hilite | 3.1.3.1. Responsibility for Design || 2023-June-16 }}====

<ol>
<li>The ''Design Authority'' is responsible for determining ''Specified Wind Loads'' for each ''roof system'' and each roof area of a ''project'', including roofs that support ''Vegetated Roof Systems'' or any other ''overburden'', amenities, or equipment.
<li>Acceptance of a roof for a '''''RoofStar Guarantee''''' is predicated on the assumption that the ''Design Authority'' has performed Due Diligence with respect to ''Specified Wind Loads'' and has provided the ''Contractor'' with sufficient information to construct a ''roof system'' that complies with the Code.
</li></ol>

===={{hilite | 3.1.3.2. Calculation of Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
<ol>
<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
<li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to ASM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
</li></ol>
<li>Each roof area, at each level (elevation), shall be divided into three principal roof zones ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}), and the ''Design Authority'' shall be responsible for calculating the ''Specified Wind Loads'' for each zone (Ref. the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=535 Article 4.1.7.6., "External Pressure Coefficients for Low Buildings"]).
<li>Roof zones are defined in this Standard as follows:
<ol>
<li>'''Field (F)''' – the interior of the roof bounded by the ''Edge'' and the ''Corners''.
<li>'''Edge (E)''' – the perimeter zone (minus the corners), measured as either 10% of the smallest building width ("least horizontal dimension"), or 40% of the building height, whichever is less. Notwithstanding the requirements in the "British Columbia Building Code", the ''Edge'' zone shall not be less than 2.0 m (7').
<li>'''Corner (C)''' – part of the perimeter but not less than 2.0 m x 2.0 m (7’ x7’) in size, the ''Corner'' area is defined by the ''Edge'' in both directions at the corners. Where the roof geometry includes an inside corner, the ''corner'' zone dimensions shall be the same as those for an outside corner, applied equidistant in each direction from the inside corner ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}).
</li></ol>
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.1.-A Water-shedding Systems 2.jpg|link=https://rpm.rcabc.org/images/c/c7/Figure_3.1.-A_Water-shedding_Systems_2.jpg | 500 px]]
|}
 
<li>A roof area that is divided into smaller segments by means of ''control joints'' (roof dividers, i.e., a fire wall) or ''expansion joints'', shall be considered one roof area for the purpose of calculating the ''Specified Wind Loads'', unless the height of a ''control joint'' or ''expansion joint'' exceeds 1 m (39"), in which case the ''Specified Wind Loads'' for each roof segment shall be calculated separately (See {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When a building is designed with multiple roof levels (at different elevations), and the roofs are adjacent each other (having a common wall), the ''Specified Wind Loads'' for each level, and for each roof area on that level, shall be calculated separately from loads for the adjacent level, unless the elevation difference between adjacent roof levels is less than 1.524 m (5’).
<li>When the shape of a single-level roof varies in width or length, the smallest width dimensions shall be used in the calculation of ''Specified Wind Loads'' (Ref. “minimum effective width” as defined in the "British Columbia Building Code", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=530 Article 4.1.7.2., "Classification of Buildings"]).
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Divided by a Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(4) || 2026-February-1 }} (Click to expand illustration)
|-
| colspan="1"; style="text-align:center;width:450px;" | [[File:Figure 3.1.-B Water-shedding Systems.jpg|link=https://rpm.rcabc.org/images/8/8e/Figure_3.1.-B_Water-shedding_Systems.jpg | 500 px]]
|}
 
<li>When a roof area intersects the corner of a wall, the ''Edge'' zone on either side of the wall corner must be treated as a roof ''Corner'' (2 x C) {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When an existing roof system is specified for partial replacement, the ''Design Authority'' must
<ol>
<li>calculate the ''Specified Wind Loads'' for the roof,
<li>determine if securement of the remaining roof components (left in situ) is sufficient to resist the ''Specified Wind Loads'',
<li>determine a suitable method of securement or have the ''system'' of securement engineered, and
<li>calculate and design securement for any structures or equipment.
</ol></li>
<li>''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement (See also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., "Electrical Cables and Boxes"]]).
<li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
<li>Securement of an adjoining ''waterproofing system'' shall be made in accordance with the requirements in the applicable Standard.
</li></ol>
</li></ol>

===={{hilite | 3.1.3.3. Resistance to Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>The wind uplift resistance capabilities of the selected ''roof system'' must equal or exceed the ''Specified Wind Loads'' calculated for each roof zone to which the ''system'' will be applied (see [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]]).
<li>Engineered designs to resist wind uplift may refer to the "British Columbia Building Code", Div. B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=764 Appendix C, "Table C-2"], which lists various types of loads, including wind loads, for specific reference locations throughout the province.
<li>Each engineered design must include, without limitation, the following:
<ol>
<li>Metal panel profile and gauge
<li>Type of clips
<li>Bearing plates
<li>Drag load components
<li>Fasteners (type, size and spacing)
<li>Roof assembly components (i.e. underlayment, insulation)
<li>Deck Substrate
</li></ol>
</li></ol>

===={{hilite | 3.1.3.4. Resistance to Other Loads || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.3.4. | Note A-3.1.3.4.]])

<ol>
<li>In addition to its capacity to resist ''Specified Wind Loads'', the ''roof system'' must be capable of resisting or accommodating
<ol>
<li>all anticipated live and dead loads, including (without limitation) other environmental loads, such as rain and snow, expected for the building’s size and location,
<li>gravity ("drag") loads,
<li>loads from ''overburden'' (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
</li></ol>

====3.1.3.5. {{hilite | Reserved || 2026-February-1 }}====

===3.1.4. Insulated Roof Systems===
===={{hilite | 3.1.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>New and fully replaced ''insulated systems'' shall satisfy the requirements of the "British Columbia Building Code" and this Part, and shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.1.5. Uninsulated Roof Systems===
===={{hilite | 3.1.5.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be designed for securement directly to the ''roof deck''.
</li></ol>

===3.1.6. Reserved===

===3.1.7. Roof Replacement and Alterations===
===={{hilite | 3.1.7.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads'' and must follow the design requirements specified by the ''Design Authority''.
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===
===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The ''Design Authority'' should specify the correct type of fastener, keeping in mind
<ol>
<li>pull-out strength, and
<li>corrosion resistance (contributing factors to fastener corrosion may include dissimilar metal contact, excessive building humidity, corrosive chemicals within components of the ''roof system'', or corrosive elements provided within the building envelope etc.).
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Fasteners
<ol>
<li>used to secure metal panels or clips shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and
<li>used to secure linear metal flashings shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>
</li></ol>

==Section 3.3. Application==
===3.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''',
</li></ol>

===3.3.2. All Systems===
====3.3.2.1. Securing Systems with Mechanical Fasteners====
({{hilite | See '''Figure 3.3.2.1.-A''' || 2021-October-30 }})

<ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}
<ol>
<li>{{hilite | be secured to a firm support, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>Concealed fasteners should provide clearance for the underside of the metal panel and must be of a material compatible with the panel or metal clip.
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}

===3.3.3. Insulated Roof Systems===
===={{hilite | 3.3.3.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Insulated systems'' shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.3.4. Uninsulated Roof Systems===
===={{hilite | 3.3.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be secured with clips fastened to the ''roof deck'', in keeping with the engineered design requirements (Ref. [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]) and conforming to the material requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]
</li></ol>

===3.3.5. Reserved===
===3.3.6. Roof Replacement and Alterations===
===={{hilite | 3.3.6.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>''Roof systems'' that are removed and replaced in their entirety (excluding the air or vapour controls, which may be left in place at the discretion of the ''Design Authority'') must be secured following the requirements for new ''roof systems''.
</li></ol>

===={{hilite | 3.3.6.2. Partial Roof Replacement || 2023-June-16 }}====

<ol>
<li>When only a portion of an existing ''roof system'' is specified for replacement, the new materials must be secured to resist wind ''Specified Wind Loads'', following the design specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'' means a material used in a roof or grade-level waterproofing ''system'' that protects a building interior from water. ''Primary materials'' are often exposed to the weather (protected membranes are an exception), and therefore also protect ''secondary materials'' from damage. Membranes, metal panels, asphalt shingles, and cedar shakes and shingles, form the core body of materials classified as ''primary''.
<li>''Secondary Material'' means one which forms part of a ''waterproofing system'' or ''water-shedding system'', and which may affect the wind resistance characteristics of the entire ''assembly'' but is not necessarily exposed to the weather.
</li></ol>
</li></ol>

===4.1.2. Reserved===
===4.1.3. Reserved===

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the ''manufacturer'' of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>{{hilite | validated with a packing slip, retained in their original packaging, or their packaging must be retained on site, and made available to the observer for verification and documentation || 2026-February-1 }},
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the roof surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''roof system'' shall conform to the ''manufacturer's'' published requirements, unless stated otherwise in this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to ASM Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to ASM Standard#A-5.1.3.1.| Note A-5.1.3.1.]])

<ol>
<li>A deck or wall overlay must be specified
<ol>
<li>when a thermal layer is required by the Building Code, or
<li>when the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li>''Uninsulated systems'' designed for a steel deck require a ''deck overlay'' to support the underlayment.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>Deck and wall overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>{{hilite | suitable for the type of ''deck'' || 2023-October-28 }}, and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
<li>When plywood is used as a deck overlay, only tongue-and-groove plywood is acceptable and must be
<ol>
<li>at least 12.7 mm (1/2”) thick when installed over a mass timber deck, or
<li>at least 15.88 mm (5/8”) thick, when the roof supports overburden.
</li></ol>
</li></ol>

====5.2.1.2. Thermal Barrier====

<ol>
<li>When the Code having jurisdiction requires a thermal barrier, any material selected from [[Division_C | Division C]] must be suitable for the purpose.
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU), or
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), conforming to ASTM C1325 (latest edition), "Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units".
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Panel Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.3.2. All Systems===
====5.3.2.1. Support, Arrangement, and Securement of Deck Overlays====

<ol>
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>''Deck'' overlays shall be affixed to the ''deck'' with
<ol>
<li>mechanical fasteners conforming to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]],
<li>polyurethane foam adhesives acceptable to the ''manufacturer'' and conforming to the requirements in [[#3.2.2.2. Adhesives | Article 3.2.2.2.]], or
<li>a combination of mechanical fasteners and polyurethane foam adhesives.
</li></ol>
<li>When mechanical fasteners are used to secure deck overlays, the minimum number of fasteners (in combination with plates) shall be four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel ''deck'' panels must be overlaid with a suitable substrate to provide a smooth, uniform surface for roofing.
<li>RoofStar-accepted ''deck'' overlay boards used as a thermal barrier to achieve a specific fire rating must conform to the applicable code and insurance requirements for the ''roof system''.
<li>When the ''roof system'' is uninsulated, the ''deck'' must be overlaid with at least one 12.7 mm (1/2”) thick layer of
<ol>
<li>moisture resistant gypsum core ''deck'' overlay board, or
<li>plywood.
</li></ol>
</li></ol>

====5.3.2.3. Overlays on Concrete Decks====

<ol>
<li>While metal panels must be separated from a concrete ''deck'' to prevent corrosion, a ''deck overlay'' is not mandatory, and separation may be made with an underlayment.
</li></ol>

====5.3.2.4. Overlays on Wood Decks====

<ol>
<li>A mechanically fastened overlay board is required for any ''deck'' structure that does not meet the ''deck'' fastening criteria set out in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]].
</li></ol>

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>''Wall'' overlay panels must be
<ol>
<li>mechanically fastened with screw fasteners spaced no more than 304.8 mm (12”) O.C., both vertically and horizontally; fasteners must align with structural supports, and shall be placed
<ol>
<li>at the perimeters,
<li>at the corners, and
<li>in the field, or
</li></ol>
<li>adhered with a polyurethane adhesive, applied with a continuous z-patterned ribbon spaced no less than 304.8 mm (12”) apart.
</li></ol>
</li></ol>
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to ASM Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to ASM Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. {{hilite | Additionally, the following terms are used in this Part || 2024-June-15 }}:
<ol>
<li>{{hilite | ''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material || 2024-June-15 }}.
<li>{{hilite | ''Continuity'' means a sealed, resistive, continuous connection || 2024-June-15 }}
<ol>
<li>{{hilite | between ''control layers'' that have the same function, and || 2024-June-15 }}
<li>{{hilite | between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration) || 2024-June-15 }}.
</li></ol>
<li>{{hilite | ''Control layer'' means a material used in a ''roof assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly || 2024-June-15 }}.
<li>{{hilite | ''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material || 2024-June-15 }}.
<li>{{hilite | ''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material, and is usually used in wall assemblies || 2024-June-15 }}.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible to specify
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''roof system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to ASM Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''roof system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity {{hilite | of Control Layers || 2024-June-15 }} {{strike| Between Building Enclosure Systems || 2023-June-15 }}====

<ol>
<li>The ''Design Authority'', and trades constructing walls and roofs, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between ''wall systems'' and ''roof systems''.
<li>{{hilite | Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor'' || 2024-June-15 }}.
<li>{{hilite | ''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials ({{hilite |some air ''control layers'' are considered vapour permeable, others vapour-impermeable || 2020-October-22 }}); ''roof systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>{{hilite | All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B, || 2024-June-15 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. High-humidity Building Interiors====

<ol>
<li>Careful consideration should be given to the performance characteristics of air and vapour ''control layers'' when specifying such a membrane for ''roof systems'' constructed over high-humidity building interiors, which may be susceptible to the accumulation of moisture within the ''roof system'' unless effective air and vapour controls are installed; these building interiors include (but are not limited to)
<ol>
<li>swimming pools,
<li>commercial laundry facilities,
<li>large aquariums, and
<li>paper mills.
</li></ol>
</li></ol>

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the roof or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to ASM Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a roof designed and built to qualify for a '''''RoofStar Guarantee''''' shall not include
<ol>
<li>polyethylene sheet plastic, or
<li>bitumen-impregnated kraft paper.
</li></ol>
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick {{hilite | self-adhering bituminous or butyl-based membrane || 2026-February-1 }} is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>{{hilite | Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard|| 2020-July-3 }}.
<li>{{hilite | A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited|| 2020-July-3 }}.
</li></ol>

====6.2.1.5. Vapour Controls for Concrete Decks====

<ol>
<li>Because curing concrete releases considerable moisture that can compromise the performance of a ''roof system'', a vapour ''control layer'' installed on new concrete ''decks'' (28 days or older) must be selected to prevent condensation inside the ''roof system''.
<li>A membrane with a permeability of 0.01 perms (Class I) is recommended for applications on concrete substrates, but the selection of vapour control materials is nevertheless the responsibility of the ''Design Authority''.
</li></ol>

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' in the ''roof system'' field, and at perimeters, are installed to provide at least 101.6 mm (4”) of overlap, for continuity of matching layers in adjacent assemblies,
<li>{{hilite | ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', || 2023-June-16 }} and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., walls), when a roof is replaced.
</li></ol>
<li>Installation of all air and vapour control materials must be {{hilite | smooth and uniform, without wrinkles or fish-mouths|| 2020-July-3 }}, and must {{hilite | also|| 2020-July-3 }} conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>{{hilite | When self-adhered membranes are applied directly to a steel supporting ''deck'',|| 2021-February-7 }}
<ol>
<li>{{hilite | membranes should be oriented parallel to the direction of ''deck'' flutes|| 2021-February-7 }}, and
<li>{{hilite | membrane laps and changes in plane must be supported by deck flutes, or by flat metal supports secured to the deck to span gaps|| 2021-February-7 }}.
</ol></li>
<li>When metal supports are used to span gaps between steel deck flutes, they must be
<ol>
<li>{{hilite | fabricated from pre-finished steel with a thickness no less than 24-gauge|| 2021-February-7 }}, and
<li>{{hilite | secured to the ''deck'' with no fewer than two (2) compatible screw fasteners per flute|| 2021-February-7 }} ({{hilite | See {{hilite | '''Figure 6.3.2.1.-A''' || 2026-February-1 }} and {{hilite | '''Figure 6.3.2.1.-B''' || 2026-February-1 }}|| 2021-February-7 }}).
</ol></li>
<li>{{hilite | ''Roof drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity'' || 2024-June-15 }}.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck With Metal Support''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck With Deck Overlay Panel''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }}
|-
| [[File:Figure 6.3.1-1.jpg | link=https://rpm.rcabc.org/images/5/54/Figure_6.3.1-1.jpg | 350 px]] || [[File:Figure 6.3.1-2.jpg | link=https://rpm.rcabc.org/images/d/d0/Figure_6.3.1-2.jpg | 350 px]]
|}

====6.3.2.2. Torch-applied Materials====

<ol>
<li>{{hilite | The application of materials to an unprotected combustible material, using a torch, is strictly prohibited|| 2020-July-3 }}.
<li>{{hilite | All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials|| 2020-July-3 }}
<ol>
<li>{{hilite | on ''decks'', ''walls'', blocking, and canted edges|| 2020-July-3 }}, and
<li>{{hilite | that are hidden or obscured within voids, cracks, or orifices|| 2020-July-3 }}.
</li></ol>
<li>{{hilite | When a torch-applied membrane is specified over combustible materials, all joints between overlay panels, and at roof-wall transitions, must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes|| 2020-July-3 }}.
<li>{{hilite | Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]|| 2020-July-3 }}.
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====
<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including {{hilite | heat from|| 2021-June-30 }} liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate and mineral wool. Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral wool insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to ASM Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements, with respect to
<ol>
<li>the use of a thermal barrier between the ''roof deck'' and the insulation ''system'', and
<li>the minimum required thermal resistance of the insulation ''system''.
</li></ol>
</li></ol>

====7.1.3.2. General Requirements====
(See [[Notes to ASM Standard#A-7.1.3.2. | Note A-7.1.3.2.]])

<ol>
<li>{{hilite | Selected board insulation products may be used within an architectural sheet metal panel ''roof systems'', provided the panels are listed in || 2023-June-16 }} [[Division_C | Division C]], {{hilite | and conform to the material specifications in || 2023-June-16 }} [[#Section 7.2. Materials | Section 7.2.]]
<li>{{hilite | Insulation may be used below the ''roof deck'' (not part of the ''roof assembly''), provided a ventilation space no less than 63.5 mm (2-1/2"), measured between the underside of the ''roof deck'' and the top face of insulation, is retained beneath the ''deck'' to keep it cool (Ref. the "British Columbia Building Code", Division B, || 2023-June-16 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.1., "Required venting"], and [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]).
<li>{{hilite | Spray foam insulation may not be used directly beneath a wood ''roof deck'' that supports an architectural sheet metal panel ''roof system'', unless the ''manufacturer'', and the '''''Guarantor''''', jointly agree in writing that moisture in the ''roof deck'' can be adequately vented out of the ''roof assembly''. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>{{hilite | Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee'''''), provided || 2023-June-16 }}
<ol>
<li>{{hilite | the ''Design Authority'' has specified its reuse, and || 2023-June-16 }}
<li>{{hilite | the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
(See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>Insulation ''assemblies'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See {{hilite | '''Figure 7.1.3.4.-A'''|| 2026-February-1 }}).
<li>{{hilite | At intersections with insulated curbs and walls, insulation joints at the roof-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See {{hilite | '''Figure 7.3.2.2.-A)'''|| 2026-February-1 }}. || 2023-June-16 }}
<li>{{hilite | ''Insulated systems'' || 2027-February-1 }}{{strike| that utilize metal panel clips shall specify clip attachment|| 2026-January-31 }} {{hilite | should utilize methods of panel clip attachment that minimize thermal bridging and the potential for condensation (See || 2027-February-1 }}[[Notes to ASM Standard#A-7.1.3.4.(4)| {{hilite | Note A-7.1.3.4.(4))|| 2026-February-1 }}]]{{hilite |, including the use of || 2027-February-1 }}
<ol>
<li>{{hilite | mechanically fastened bearing plates which are installed on the top surface of the insulation layers|| 2027-February-1 }}, {{strike| to thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or || 2026-January-31 }}
<li>{{hilite | metal girts placed in the top layer of insulation, secured to the deck with screws penetrating lower layers of insulation|| 2027-February-1 }}, or
<li>{{hilite | thermally non-conductive intermediate or continuous supports that pass through the insulation ''assembly''|| 2027-February-1 }}. {{strike| to mechanically fastened bearing plates which are installed on the top surface of the insulation.|| 2026-January-31 }}
</li></ol>
<li>{{hilite | Where spray foam is specified for use in the roof system, it shall conform to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2027-February-1 }}]] {{hilite |(Also, see Sentence (4), || 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.) || 2027-February-1 }}]].
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Insulated Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.4.1. Reuse of Insulation for Panel Replacement====

<ol>
<li>{{hilite | When a roof is specified for panel replacement only, the existing insulation may be left in place (Subject to the requirements in || 2023-June-16 }} [[#1.1.4.3. Partial Roof Replacement | Article 1.1.4.3.]]), {{hilite | but will be excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
</li></ol>

====7.1.4.2. Protection of Heat-sensitive Insulation====

<ol>
<li>When ''heat-sensitive insulation'' is used in the primary thermal ''assembly'', it must be covered with a ''heat-resistant insulation'' at least 50.8 mm (2”) thick (See [[Notes to ASM Standard#A-7.1.4.2. | Note A-7.1.4.2.]]).
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>The maximum width and length of insulation boards installed with mechanical fasteners is limited only by the ''manufacturer''.
<li>{{hilite | While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''roof system'' from a material handling perspective and consider specifying a thicker panel|| 2021-June-30 }}.
</li></ol>
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.2. Expanded Polystyrene Insulation====

<ol>
<li>Expanded polystyrene ("EPS") is ''heat-sensitive'' and shall conform to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.3. Polyisocyanurate Insulation====
(See [[Notes to ASM Standard#A-7.2.2.3. | Note A-7.2.2.3.]])

<ol>
<li>Polyisocyanurate insulation ("Polyiso") is ''heat-resistant'' and
<ol>
<li>shall conform to CAN/ULC-S704, "Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced", and to ASTM C-1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board",
<li>shall be manufactured with non-organic facers, and
<li>shall be labeled to identify the manufacturer and the date of manufacture.
</li></ol>
</li></ol>

====7.2.2.4. Mineral Fibre Insulation====

<ol>
<li>Mineral fibre insulation ("Mineral wool") is ''heat-resistant'' and shall conform to ASTM C726-17, "Standard Specification for Mineral Wool Roof Insulation Board".
</li></ol>

===={{hilite | 7.2.2.5. Spray Foam Insulation || 2027-February-1 }}====
<ol>
<li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2027-February-1 }}.
<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling minor gaps {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
<li>must be offset at least 304.8 mm (12"), both for adjacent layers and for adjacent row (a minus offset tolerance of 50.8 mm (2") maximum is permissible; see '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2026-February-1 }} {{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.3 Insulation Offset and Staggered.jpg|link=http://rpm.rcabc.org/images/2/28/7.3_Insulation_Offset_and_Staggered.jpg | 500 px]]
|}
 
<li>{{hilite | On exterior insulated walls, insulation joints at the roof-wall interface must be offset and staggered to eliminate thermal bridging|| 2022-February-5 }} ({{hilite | See {{hilite | '''Figure 7.3.2.2.-B''' || 2026-February-1 }}|| 2022-February-5 }}).
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.3.2.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-B (ASM).jpg| link=https://rpm.rcabc.org/images/7/7e/Figure_7.3.2.-B_%28ASM%29.jpg | 500 px]]
|}
 
<li>{{hilite | Where penetrations pass through an insulation system, or where thermally non-conductive intermediate or continuous supports for clips are used, any minor voids less than 25.4 mm (1”) around them must be insulated with a spray foam conforming to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5.|| 2027-February-1 }}]]{{hilite |, to reduce the potential for condensation || 2027-February-1 }}.
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''roof assembly'', calculated to resist the ''Specified Wind Loads'' for the ''roof system''.
<li>{{hilite | When thermally non-conductive clips or bars are utilized on a ''low slope'' roof to retain insulation and support panel clips, they must be embedded in, and fastened through, a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7.]])|| 2021-June-30 }}.
</li></ol>

====7.3.2.4. Protection of Heat-sensitive Insulation====

<ol>
<li>{{hilite | Heat-sensitive insulation must be protected from high temperatures, both during construction and when placed in service, and therefore it must be overlaid with heat-resistant insulation no less than 50.8 mm (2") thick || 2023-June-16 }} (See [[#7.1.4.2. Protection of Heat-sensitive Insulation | Article 7.1.4.2.]]).
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Eave, Valley, and Field Underlayment=
==Section 8.1. Design==

===8.1.1. General===
====8.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====8.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Eave and Valley Protection'' means a self-adhering sheet membrane applied in valleys and in parallel courses {{hilite | on the roof ''deck''|| 2021-June-30 }} along the eaves, up the roof slope to a point measured vertically from the inside of the exterior wall, and intended to block the ingress of water that may leak behind shingles or metal roof panels as the result of snow or ice buildup on the roof surface.
<li>{{hilite | ''Separation Layer'' (sometimes referred to as a "slip sheet") means a roll material installed directly below metal roof panels to|| 2021-June-30 }}
<ol>
<li>{{hilite | inhibit bonding of the metal panels to underlying materials, such as bitumen-based underlayments or ''eave protection'' membranes, or|| 2021-June-30}}
<li>{{hilite | permit the passage of vapour out of the roof system|| 2021-June-30 }} ({{hilite | A ''separation layer'' by itself does not function as a ''ventilation layer''|| 2021-June-30 }}).
</li></ol>
<li>''Underlayment'' means a sheet (rolled) material that is either self-adhering or mechanically fastened (typically with large head nails), and which is installed
<ol>
<li>{{hilite | immediately over the supporting ''deck'' or ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | to provide secondary protection between the ''water-shedding system'' materials and the building interior|| 2021-June-30 }}, and
<li>{{hilite | to keep ''water-shedding system'' materials from adhering to the ''deck''.|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | ''Ventilation Layer''|| 2021-June-30 }} means a layer of roll material, usually comprised of stiff, synthetic entangled mesh, installed directly beneath the metal panels in place of, or in addition to, a ''separation layer''; it forms a ventilation space intended to
<ol>
<li>facilitate the {{hilite | drying|| 2021-June-30 }} of condensation that collects on the bottom surface of metal roof panels, and
<li>inhibit bonding of metal roof panels with underlying materials.
</li></ol>
</li></ol>
</li></ol>

===8.1.2. Guarantee Term Requirements===
====8.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.1.3. All Systems===
====8.1.3.1. Eave Protection====

<ol>
<li>{{hilite | Sheet membrane ''eave protection'' is required on all ''Common Slope'', ''Steep Slope'', and ''Extreme Slope'' roofs, but is not required || 2023-June-16 }}
<ol>
<li>{{hilite | over unheated spaces, and || 2023-June-16 }}
<li>{{hilite | where the roof overhang exceeds 914.4 mm (36") measured along the roof slope from the edge of the roof to the inner face of the exterior ''wall''. || 2023-June-16 }}
</li></ol>
<li>{{hilite |Sheet membrane ''eave protection''|| 2021-June-30 }}
<ol>
<li>must conform to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<li>{{hilite | must be installed on the ''supporting deck'' or on a ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | may also serve as an air barrier or vapour retarder, or as both, when installed in combination with an ''underlayment'' sharing the same performance characteristics|| 2021-June-30 }},
<li>{{hilite | must be at least 1 mm thick when the roof slope exceeds 1:6 (2” in 12”)|| 2021-June-30 }},
<li>{{hilite | shall be at least 3 mm thick when the roof slope is less than 1:6 (2” in 12”)|| 2021-June-30 }}. and
<li>must be carried
<ol>
<li>a minimum of 609.6 mm (24") up inside interior walls (914.4 mm (36") in heavy snow load conditions, and
<li>down the vertical face of the eave and rake edges by at least 50.8 mm (2").
</li></ol>
</li></ol>
</li></ol>

====8.1.3.2. Valley Protection====

<ol>
<li>Valley Protection is required on all ''projects'', shall conform to the requirements for eave protection in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]], and shall be specified to cover the entire valley, even where eave protection is exempt.
</li></ol>

====8.1.3.3. Field Underlayment====

<ol>
<li>''Underlayments'' are required on all Architectural Sheet Metal Panel Systems, and
<ol>
<li>must be self-adhering when the roof slope is equal to or greater than 1:6 (2" in 12") but is less than 1:3 (4" in 12"), and
<li>may be nail-applied or self-adhered when the roof slope is 1:3 (4" in 12") or greater.
</li></ol>
<li>{{hilite | Self-adhered membranes specified for ''low slope'' roofs (slopes less than 1:3 (4" in 12")) must || 2023-June-16 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2023-June-16 }} [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]{{hilite | , and || 2023-June-16 }}
<li>{{hilite | achieve a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")) || 2023-June-16 }}
</li></ol>
<li>{{hilite |Multiple layers of self-adhering ''eave protection'' membrane may be specified to achieve the minimum thickness requirement in this Article, but|| 2021-June-30 }}
<ol>
<li>{{hilite |each layer must be at least 1.4 mm thick,|| 2021-June-30 }} and
<li>{{hilite |layering must be permitted by the '''''Guarantor''''' through a written Variance (Ref. [[#1.1.3.6. Variances | Article 1.1.3.6.]])|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Underlayments for roofs in high snow load conditions are governed by the requirements in || 2026-February-1 }} [[#9.1.3.3. Panel Seams | {{hilite | Article 9.1.3.5. || 2026-February-1 }}]].
</li></ol>

====8.1.3.4. Separation Layer Between Materials====

<ol>
<li>A separation layer {{strike| material || 2026-January-28 }} is required
<ol>
<li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or
<li>{{hilite |when soldering is to be done|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), a|| 2027-February-1 }} {{hilite |vapour-permeable ''separation layer'' {{hilite | conforming to the requirements in [[#8.2.1.4. Separation Materials | Article 8.2.1.4.]]|| 2027-February-1 }} is required between metal panels and insulation.|| 2021-June-30 }}
<li>{{hilite | Self-adhered underlayments that are impermeable, that are used in an uninsulated ''roof assembly'' and which are manufactured with a non-bonding top facer, do not require an additional separation layer|| 2027-February-1 }}.
</li></ol>

====8.1.3.5. Ventilation Beneath Panels====
{{hilite | (See [[Notes to ASM Standard#A-8.1.3.5. | Note A-8.1.3.5.]]. || 2024-January-31 }} {{hilite | Also see [[#8.3.2.6. Ventilation Materials | Article 8.3.2.6.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] for installation requirements) || 2027-February-1 }}

<ol>
<li>{{hilite | A ''ventilation'' {{hilite | (drying) || 2027-February-1 }} ''space'' beneath metal roof panels|| 2021-October-30 }}
<ol>
<li>{{hilite | is required on slopes less than 1:3 (4” in 12”)|| 2021-October-30 }},
<li>is required beneath curved panel ''systems'', and
<li>{{hilite | is recommended when the roof slope exceeds 1:3 (4” in 12”)|| 2021-June-30 }}.
</li></ol>
<li>{{strike| {{hilite | Ventilation beneath panels shall be incorporated into the ''roof system'' design|| 2021-October-30 }} || 2026-January-27 }}{{hilite | A ''ventilation'' (drying) ''space'' beneath panels shall conform to the installation requirements in this Standard and shall be achieved by || 2027-February-1 }}
<ol>
<li>{{hilite | {{strike| by || 2026-January-27 }} supporting the metal panels with entangled mesh {{hilite | conforming to the material requirements in [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]|| 2027-February-1 }}{{strike| that is at least 6.35 mm (1/4”) thick, and by securing the panels using standard panel clips supported on EPDM pads equal in thickness to the entangled mesh (Ref. [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])|| 2021-October-30 }}|| 2026-January-27 }}, or
<li>{{hilite | {{strike| by || 2026-January-27 }} elevating unsupported metal panels above the underlying substrate materials by at least 9.53 mm (3/8”), {{hilite | provided the panels satisfy the requirements in Article 1.1.3.1., Sentence (2)|| 2027-February-1 }}. {{strike| and securing the panels with tall panel clips; this approach does not require EPDM pads and entangled mesh, and is acceptable provided {{strike| the ''Design Authority'' supplies the '''''Guarantor''''' with written engineering certification that || 2023-January-26 }}|| 2021-October-30 }} || 2026-January-27 }}
{{strike| <ol>
<li>{{hilite | the ''Contractor'' provides the '''''Guarantor''''' with written assurance concerning the load-bearing capacity of the panel system (Ref. || 2024-January-31 }} [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], "Submittals"),
<li>{{hilite | clips are fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | bearing plates (when used) are embedded in an acceptable sealant, to prevent water ingress around the screws. || 2024-January-31 }}
</li></ol>
</li></ol>
<li>{{hilite | When tall clips are used as an alternative to EPDM pads, the clips shall be fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | but when bearing plates are used without EPDM pads and support tall clips, the bearing plates shall also be embedded in sealant, to prevent water ingress around the screws. || 2024-January-31 }}

{{strike| <li>{{hilite | the clips will adequately secure and support the elevated panels|| 2021-October-30 }}.
<li>{{hilite | the panels are suitable as spanning members and will support anticipated live loads, including loads during construction|| 2021-October-30 }}. || 2023-January-26 }} || 2026-January-27 }}
</li></ol>
</li></ol>

==Section 8.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===8.2.1. Material Properties===
====8.2.1.1. Suitability of Materials====

<ol>
<li>{{hilite | All materials specified for use in a ''roof system'' must be expressly manufactured for use in a roof and must be listed in Division C (Ref. || 2024-June-15 }} [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.).]]
<li>{{hilite | Materials used for ''eave or valley protection'', as an ''underlayment'', or as a ''separation layer'', must not damage the painted finish of roof panels (a scratched or marred finish may result in panel corrosion)|| 2020-July-3 }}.
<li>{{hilite | When a material not listed in [[Division_C | Division C]] is specified for application in an Architectural Sheet Metal Roof System, the ''Design Authority'' must request a written Variance from the '''''Guarantor'''''|| 2020-July-3 }}.
<li>{{hilite | The ''Design Authority'' must select the most suitable material for eave protection, a separation layer, or as an underlayment, based on || 2024-June-22 }}
<ol>
<li>{{hilite | where the material will be located within the roof assembly, || 2024-June-15 }}
<li>{{hilite | the anticipated service temperature for the material, and || 2024-June-15 }}
<li>{{hilite | the material's published service temperature rating (see || 2024-June-15 }} [[Notes to ASM Standard#A-8.2.1.1.(3) | Note A-8.2.1.1.(3)]]).
</li></ol>
<li>All membranes must be supplied with proprietary sealants, mastics, tapes, and primers, each one suitable for the application of the ''underlayment''.
</li></ol>

====8.2.1.2. Eave and Valley Protection====

<ol>
<li>{{hilite |{{hilite | Bituminous || 2026-February-1 }} sheet membranes used for ''eave and valley protection'' must|| 2021-June-30 }}
<ol>
<li>{{hilite | conform to the requirements in CSA-A123.22, "Self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection," || 2023-June-16 }}
<li>{{hilite | be made of bitumen with a high softening point and a minimum flow temperature of 87.7°C (190°F) when they are used immediately below any metal panels or flashing (Ref. ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material"), || 2023-June-16 }}
<li>be self-adhering, and
<li>{{hilite | have a sanded or synthetic, non-bonding top surface|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Butyl-based sheet membranes used for eave and valley protection shall || 2026-February-1 }}
<ol>
<li>{{hilite | be self-adhering and || 2026-February-1 }}
<li>{{hilite | have a synthetic, non-bonding top surface|| 2026-February-1 }}.
</li></ol>
</li></ol>

====8.2.1.3. Underlayment====

<ol>
<li>{{hilite | Mechanically attached polymeric ("synthetic") fabric underlayments shall conform to the criteria in || 2023-June-16 }} [http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf RGC ACWS-PUL, "RGC Acceptance Criteria for Mechanically Attached Polymeric Roof Underlayments Used in Water-shedding Systems"].
<li>{{hilite | {{hilite | Self-adhering modified bituminous or butyl-based || 2026-February-1 }} sheet membrane underlayments must conform to the requirements in [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]] {{hilite | and || 2024-January-31 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]|| 2022-June-17 }}
</li></ol>
</li></ol>

====8.2.1.4. Separation Layer====

<ol>
<li>{{hilite | Separation layer materials || 2027-February-1 }}
<ol>
<li>{{hilite | must be manufactured as rolled goods and shall resist bonding with the underside of metal panels, and || 2027-February-1 }}
<li>{{hilite | may be self-adhered or loose laid || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Breathable separation layers shall be manufactured to allow the passage of water vapour through the material and therefore shall have a minimum permeability rating of 5 perms, tested and validated using ASTM E96/E96M-22a, "Standard Test Method for Gravimetric Determination of Water Vapour Transmission Rate of Materials" (products with a US permeability rating less than 5 perms are considered impermeable and therefore unsuitable as separation materials in insulated roof systems) || 2027-February-1 }}.
<li>{{hilite | Entangled mesh || 2023-June-16 }} (See [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]), {{hilite | which is commonly used for ventilation immediately beneath metal panels, may also serve as a separation (bond-breaking) material. || 2023-June-16 }}
</li></ol>

====8.2.1.5. Ventilation Materials====

<ol>
<li>{{hilite | Entangled mesh used in a ventilation cavity must {{strike| be || 2025-February-1 }}|| 2021-October-30 }}
<ol>
<li>{{hilite | be manufactured from polymeric filaments that fuse where they intersect|| 2026-February-1 }},
<li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
<li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.
</li></ol>

====8.2.1.6. Fasteners====

<ol>
<li>Mechanical fasteners used to secure nail-applied underlayments must conform to the underlayment manufacturer’s requirements.
<li>Staples are not permitted.
</li></ol>

==Section 8.3. Application==
===8.3.1. Guarantee Term Requirements===
====8.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.3.2. All Systems===
====8.3.2.1. Installation of Eave Protection====

<ol>
<li>{{hilite | Where ''eave protection'' is required, it must || 2023-June-22 }}
<ol>
<li>{{hilite | overhang the fascia by at least 25.4 mm (1”), || 2023-June-22 }}
<li>{{hilite | extend up the slope at least 914.4 mm (36"), or to a line not less than 609.6 mm (24") inside the inner face of the exterior wall || 2023-June-22 }} (914.4 mm (36") in regions with heavy snow; see {{hilite | '''Figure 8.3.2.1.-A''' || 2026-February-1 }}), and
<li>{{hilite | extend up all abutments (walls, skylights, etc.) at least 152.4 mm (6″) above the surface of the ''finished system surface''. || 2023-June-22 }}
</li></ol>
<li>{{hilite | Horizontal runs of ''eave protection'' must be positively lapped at least 50.8 mm (2″) and end laps (vertical joints) must be at least 152.4 mm (6″). || 2023-June-22 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 8.3.2.1.-A Eave Protection Requirements''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 8.3.2.1.(1) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File: Figure 8.3.2.-A (ASM).jpg | link=https://rpm.rcabc.org/images/1/17/Figure_8.3.2.-A_%28ASM%29.jpg | 500 px]]
|}

====8.3.2.2. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membranes must|| 2021-June-30 }}
<ol>
<li>{{hilite | be the same materials used for ''eave protection'', conforming to the requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],|| 2021-June-30 }},
<li>{{hilite | be centred on,|| 2021-June-30 }} and installed parallel to, the valley line, extending from the eave edge past the upper end of the valley metal flashing, at least 50.8 mm (2”),
<li>{{hilite | be at least 990.6 mm (39”) wide and centred on the valley|| 2021-June-30 }},
<li>positively overlap lower runs of valley membrane by no less than 152.4 mm (6”), rolled to ensure even, full adhesion, and
<li>{{hilite | positively lap and seal to the ''eave protection'' membrane|| 2021-June-30 }}.
</li></ol>
</li></ol>

====8.3.2.3. Underlayment for Common and Steep Slopes====

<ol>
<li>All nail-applied polymeric ("synthetic") ''underlayments'' installed on slopes less than 2:3 (8” in 12”)
<ol>
<li>shall be installed using fasteners acceptable to the manufacturer of the ''underlayment'',
<li>shall be secured to conform to the ''underlayment'' manufacturer's published instructions,
<li>must run parallel to the eave,
<li>shall positively overlap adjacent material by
<ol>
<li>at least 76.2 mm (3″) along the sides, unless exceeded by the ''manufacturer’s'' instructions, and
<li>at least 152.4 mm (6″) at the ends, unless exceeded by the ''manufacturer’s'' instructions,
</li></ol>
<li>must run beneath all ''water-shedding system'' materials, irrespective of slope,
<li>must extend beneath all perimeter ''linear metal flashing'',
<li>shall cover the roof deck beneath all penetration flashings, and
<li>must be carried up vertical surfaces at least 152.4 mm (6”) above the ''roof deck'', where roofing materials and flashings adjoin walls or curbs.
</li></ol>
<li>"Negative" laps that are unavoidable in horizontally applied courses of ''underlayment'' are permissible, but only when
<ol>
<li>the ''underlayment'' is a self-adhering membrane (Ref. [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]),
<li>the membrane runs overlap at least 152.4 mm (6"), and
<li>lapped seams are roller-pressed and sealed with a compatible sealant along the seam edge.
</li></ol>
<li>Installing nail-applied polymeric ("synthetic"), self-adhered bituminous, or butyl ''underlayments'' perpendicular to the eave is permissible but the laps must be self-sealing or must be sealed with a suitable lap cement provided by the underlay manufacturer.
<li>When an ''underlayment'' is installed perpendicular to the eave and the roof slope exceeds 2:3 (8” in 12”), the ''underlayment''
<ol>
<li>shall be self-adhering,
<li>must extend beyond the furthermost edge of the flashing at least 101.6 mm (4"), and
<li>shall positively laps beneath other vertical membranes.
</li></ol>
</li></ol>
</li></ol>

====8.3.2.4. Underlayment for Slopes Less Than 1:3====

<ol>
<li>All roofs sloped less than 1:3 (4" in 12") must be covered with one or more layers of self-adhered or thermally fused ''underlayment'' membrane,
<ol>
<li>conforming to the material requirements in [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>achieving a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")), and
<li>installed to conform to the requirements in [[#8.3.2.4. Underlayment for Slopes Less Than 1:3 | Article 8.3.2.4.]]
</li></ol>
<li>{{hilite |Applying multiple layers of self-adhering ''eave protection'' membrane to achieve the minimum thickness requirement is permissible, provided|| 2021-June-30 }}
<ol>
<li>layering is acceptable to the underlayment manufacturer,
<li>{{hilite |the second layer is offset from the first by at least 304.8 mm (12"), both horizontally and vertically,|| 2021-June-30 }} and
<li>{{hilite | the ''Design Authority'' has obtained a written Variance from the '''''Guarantor''''' permitting multiple layers. || 2023-June-16 }}
</li></ol>
</li></ol>

====8.3.2.5. Separation Materials====

<ol>
<li>Horizontal runs of separation materials must be positively lapped at least 50.8 mm (2"), and vertical end joints must be lapped at least 152.4 mm (6").
</li></ol>

====8.3.2.6. Ventilation Materials====

<ol>
<li>{{strike| ''Roof systems'' that require a ventilation space shall conform to the design specifications and required in [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]] || 2026-January-27 }}{{hilite | Ventilation materials shall be installed to conform to [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] || 2027-February-1 }}
</li></ol>

<hr>
<div id=PART_9></div>

=Part 9 - Roof Field (Panel Systems)=

==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary roof covering, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed using only RoofStar-accepted panels (or panels manufactured with a RoofStar-accepted roll forming machine) secured with a hidden clip system; flange-fastened panels may not be specified or installed.
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====
(See [[Notes to ASM Standard#A-9.1.3.1.| Note A-9.1.3.1.]])

<ol>
<li>Shop drawings for each ''project'' detail, which may be drawn by the ''Contractor'', must be reviewed by the Accepted observer and returned to the ''Guarantor'', verifying conformity to the '''''RoofStar Guarantee Standards''''' prior to the start of construction.
<li>Each construction detail must be reviewed during a field review and documented in the observer's RGC field review report, to verify conformity to the '''''RoofStar Guarantee Standards'''''.
<li>A system designed with a slope less than 1:6 (2" in 12") must conform to the limitations and conditions in [[#2.1.3. All Systems | Subsection 2.1.3.]]

<li>{{hilite | Metal panel seam types must conform to the following permissible applications and length limitations, to '''Table 9.1.3.3.-A''', and to any other seam requirements in this Part, to qualify for a '''''RoofStar Guarantee'''''|| 2027-June-11 }}:
<ol>
<li>{{hilite | Mechanically locked standing seams utilizing concealed clips ('''Figure 9.1.3.1.-A''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used on roof slopes 1:6 (2” in 12”) or greater (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies || 2027-June-22 }},
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]]|| 2027-June-11 }},
<li>{{hilite | may be permitted for slopes less than 1:6, but this is subject to a Variance review (See Variance requirements in [[#2.1.3. All Systems | Subsection 2.1.3.]])|| 2027-June-11 }},
<li>{{hilite | shall be seamed with butyl when the primary slope is 1:4 (3” in 12”) or less (See '''Table 9.1.3.3.-A'''; also see [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]] and '''Figure 9.3.2.4.-A''') and|| 2027-June-11 }}
<li>{{hilite | are the only seams permitted in locations with high snow loads (for more about high snow load conditions, see [[#9.1.3.5. Roofs in High Snow Load Conditions | Article 9.1.3.5.]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams utilizing concealed clips ('''Figure 9.1.3.1.-B''') || 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-cap seams utilizing concealed clips ('''Figure 9.1.3.1.-C''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams on flange-fastened panels ('''Figure 9.1.3.1.-D''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be installed only in uninsulated assemblies|| 2027-June-11 }},
<li>{{hilite | are permissible only on roof slopes greater than 1:3 (4" in 12"), and|| 2027-June-11 }}
<li>{{hilite | are limited to a maximum length of 9144 mm (30’)|| 2027-June-11 }}.
</li></ol>
<li>The ''Design Authority'' must calculate the maximum panel length based on
<ol>
<li>the material type,
<li>the direction of expansion and contraction that is determined by the location of drag load fasteners, and
<li>the amount of expansion and contraction provided by
<ol>
<li>the fastener slot on the fastening flange, or
<li>the concealed expansion clip slot.
</li></ol>
</li></ol>
<li>Panels must be able to withstand loads as required in [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>Panels must be solidly supported (See '''Figure 9.1.3.1.-A''' (1 and 2)), unless
<ol>
<li>the panel is made to be self-supporting (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]; also see [[#9.2.1.1. Panel Grade, Gauge, and Fabrication | Sentence 9.2.1.1.(9)]]), or
<li>a ventilation space is required and the panels are suitably supported with entangled mesh (See [[#8.1.3.5. Ventilation Beneath Panels
| Article 8.1.3.5.]]; also see '''Figures 9.3.2.5-A''' through '''F''' in [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration) || colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]] || [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|-
|}

====9.1.3.2. System Securement====

<ol>
<li>{{hilite | Panel shape and securement must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]).
<li>Metal panels must be pinned to the structure with fasteners, to prevent slippage down the roof because of the weight of the ''roof system'' ("drag loads").
</li></ol>

====9.1.3.3. Panel Seams====

<ol>
<li>Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}.
</li></ol>
 
::::::::::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights''' || 2026-February-1 }} {{hilite | Forming Part of Article 9.1.3.3. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! {{hilite | Conditions || 2026-February-1 }} (see also Part 2) !! Seam Height Minimums !! Permissible Seam Types
|-
| 1:3 (4" in 12") or greater || 25.4 mm (1") || All
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 1:6 (2" in 12") to (less than) 1:3 (4" in 12") || 38.1 mm ( 1-1/2”) || Mechanical Lock only (single or double)
|-
| 41.28 mm ( 1-5/8”) || Snap Lock (male seam)
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender) || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || Mechanical Lock only (single or double)
|-
| 50.8 mm (2”) || Mechanical Lock only (double)
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | Power-curved panels (reviewed by RGC prior to tender) || 38.1 mm (1-1/2”) + butyl sealant in seam || Mechanical Lock only (single or double)
|-
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | {{hilite | Locations with High Snow Loads (defined in Article 1.1.3.3.) || 2026-February-1 }} || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || {{hilite | Mechanical Lock only (double) || 2026-February-1 }}
|}

====9.1.3.4. Curved Panel Systems====
(See [[#9.3.2.8. Curved Panels | Article 9.3.2.8.]])

<ol>
<li>Curved panel systems
<ol>
<li>are permissible, but because a curved system diminishes in slope to a zenith of 0°, the design must be submitted to the '''''Guarantor''''' prior to tender (See [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>may be specified with a minimum seam height of 38.1 mm (1-1/2") (subject to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>must continuously cover a curved substrate; segmented panels are not permissible, and
<li>must incorporate a ventilation space (see [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]).
</li></ol>
<li>{{hilite | Stiffeners are optional for curved panels, and when they are desired, the ''Design Authority'' should consult with the ''Contractor'' about stiffener profiles that can be power-curved. || 2023-June-16 }}
</li></ol>

===={{hilite | 9.1.3.5. Roofs in High Snow Load Conditions || 2026-February-1 }}====
<ol>
<li>Roofs subject to high snow loads ([[#1.1.3.3. Snow Loads | Article 1.1.3.3.]]) require
<ol>
<li>full support for metal panels,
<li>a self-adhered underlayment conforming to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] and [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>metal panels seams
<ol>
<li>with a height no less than 50.8 mm (2”) (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>that are double-locked, and
<li>sealed with butyl (See [[#9.3.2.4. Panel Securement and Seam | Sentence 9.3.2.4.(7)]]),
</li></ol>
<li>valleys conforming to [[#10.1.5.3. Valleys for Heavy Snow Load | Article 10.1.5.3.]], and
<li>placement of penetrations near the ridge line of the roof.
</li></ol>
<li>Insulated (above the roof deck; see [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]]) architectural sheet metal roofs must be designed to conform to the requirements in Sentence (1) and shall be designed with slopes equal to or greater than 1:1.5 (8” in 12”) and must permit the free discharge of snow from the roof, except where life safety is concerned.
<li>A roof with slopes less than 1:1.5 (8” in 12”) shall conform to the requirements in Sentence (1) and must be designed as a vented (cold) roof in which
<ol>
<li>the vented space above the insulation assembly shall be determined by a Building Envelope Consultant but shall not be less than 76.2 mm (3”)
<li>the supporting deck for the metal panel system is plywood with a minimum thickness of 19.05 mm (3/4”) (thickness is subject to the engineering requirements in Sentence (2)),
<li>the underlayment is self-adhering and possesses a minimum thickness of
<ol>
<li>1.0 mm when it is butyl-based,
<li>1.5 mm when it is bituminous, or
<li>3.0 mm when the slope is less than 1:6 (2” in 12”) (See [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]]), and
</li></ol>
<li>entangled mesh and EPDM pads are capable of supporting the anticipated loads from snow and other service conditions, without deformation (See [[#8.2.1.5. Ventilation Materials | Articles 8.2.1.5.]] and [[#9.2.1.6. EPDM Pads | Article 9.2.1.6.]]).
</li></ol>
</li></ol>

===9.1.4. Insulated Systems===
====9.1.4.1. General Requirements====

<ol>
<li>{{hilite | Insulated ''Architectural Sheet Metal Roof Systems'' || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-22 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]),
<li>{{hilite | shall conform to all other requirements in this Standard, || 2023-June-16 }} and
<li>{{hilite | shall minimize or eliminate thermal bridging, using thermally non-conductive clips or bars, or by using mechanically fastened bearing plates || 2023-June-16 }} (see [[#Part 7 - Insulation | Part 7, "Insulation"]]).
</li></ol>
</li></ol>

===9.1.5. Uninsulated Systems===
====9.1.5.1. General Requirements====

<ol>
<li>{{hilite | Uninsulated Architectural Sheet Metal Roof Systems || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]), and
<li>{{hilite | shall conform to all other requirements in this Standard. || 2023-June-16 }}
</li></ol>
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===9.2.1. Material Properties===
====9.2.1.1. Panel Grade, Gauge, and {{strike| Selection || 2025-February-1 }} {{hilite | Fabrication || 2026-February-1 }}====

<ol>
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06, CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06, ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
<li>'''Aluminum-Zinc alloy-coated steel''': 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06, CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>{{hilite | All panels must be factory-manufactured, or site-fabricated by an accepted ''Contractor'', and listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Metal panels must be fabricated to fully span the distance from eave to ridge, unless interrupted by ''curbs'', ''walls'', or penetrations || 2026-February-1 }}.
<li>{{hilite | Notwithstanding Sentence (4), curved metal panels, including metal panels over barrel-shaped structures (See|| 2026-February-1 }} [[#2.1.3.1. General Requirements for Roof Slope | {{hilite | Sentence 2.1.3.1.(3)|| 2026-February-1 }}]] {{hilite | concerning pre-tender reviews by the '''''Guarantor'''''), may be manufactured in segments when || 2026-February-1 }}
<ol>
<li>{{hilite | panel lengths are too long to be practicable (for example, on a barreled roof), or|| 2026-February-1 }}
<li>{{hilite | the panel material’s coefficient of thermal expansion will induce movement that exceeds the capacity of panel clips (See also|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) | {{hilite | Note A-9.2.1.1.(5)(2))|| 2026-February-1 }}]],
{{hilite | but this is permissible only when|| 2026-February-1 }}
<ol>
<li>{{hilite | the ''Design Authority'' requests a written Variance from the '''''Guarantor''''' prior to tendering the project|| 2026-February-1 }},
<li>{{hilite | the roof slope at the point of division is not less than 1:2 (6” in 12”) (See '''Figure 9.2.1.1.-A'''; also see|| 2026-February-1 }} [[Notes to ASM Standard#Note A-9.2.1.1.(5)(4) | {{hilite | Note A-9.2.1.1.(5)(4)|| 2026-February-1 }}]]{{hilite | ), || 2026-February-1 }}
<li>{{hilite | the transition flashing between panel segments has a slope of at least 1:3 (4” in 12”) (See '''Figure 9.2.1.1.-B'''), and || 2026-February-1 }}
<li>{{hilite | the ''Contractor'' has submitted to the '''''Guarantor''''' the engineered shop drawings showing the detailing of the division of metal panels, as part of the request for a written Variance|| 2026-February-1 }}.
</li></ol>
</li></ol>
<li>Sheet steel, copper and zinc roof panels may be roll-formed to a maximum width of 500 mm (20”).
<li>All metal roof panels over 304.8 mm (12”) in width must be roll-formed or factory-fabricated with stiffening ribs or striations.
<li>Panels fabricated with perforated fastening holes or slots must not exceed 9144 mm (30’) in length.
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath the panels that are not supported by a ''ventilation layer'', and tall clips are used to support the raised panels, the panels must be engineered to support anticipated live loads without permanent deformation (Ref. [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-A Segmented Curved Metal Panels Showing Transition Flashing''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-B Minimum Slope Requirements for Segmenting Curved Metal Panels''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 9.2.1.1.-A.png | link=https://rpm.rcabc.org/images/e/ef/ASM_Figure_9.2.1.1.-A.png | 450 px]] || [[File:ASM Figure 9.2.1.1.-B.png | link=https://rpm.rcabc.org/images/c/ca/ASM_Figure_9.2.1.1.-B.png | 450 px]]
|}

====9.2.1.2. Roll Forming Machines and Mill Certificate====

<ol>
<li>All machines used by a ''Contractor'' to fabricate metal panels shall be owned by a ''Contractor'', and shall be accepted by the '''''Guarantor'''''.
<li>Site-forming metal panel machines
<ol>
<li>must be certified annually by a third-party engineer,
<li>must be serviceable, maintained and calibrated with supporting documentation, and
<li>records documenting the serviceable condition of the machine must be submitted annually to the '''''Guarantor'''''.
</ol></li>
<li>''Contractors'' who own metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.
<li>the ''Contractor'' must provide a mill certification for all metal roofing ''projects'' installed under the '''''RoofStar Guarantee Program'''''.
<li>Mill certificates must confirm that the sheet metal used for forming metal panels and ''linear metal flashings'' conform to or exceeds the requirements in [[#9.2.1.1. Panel Grade, Gauge, and Selection | Article 9.2.1.1.]]
</ol></li>

====9.2.1.3.{{hilite | Pre-painted Finishes|| 2022-February-5 }}====

<ol>
<li>{{hilite | When a painted finish on G90 galvanized or AL-Zn alloy coated steel panels is specified, SMP pre-painted finishes are permissible but|| 2022-February-5 }} {{hilite | PVDF (polyvinylidene fluoride, also referred to as PVF2) is strongly recommended for durability and resilience|| 2022-February-5 }}.
</li></ol>

====9.2.1.4.{{hilite | Fasteners|| 2022-February-5 }}====
(See also [[#3.2.2.1. Fasteners | Article 3.2.2.1.]])

<ol>
<li>Fasteners used to secure metal panels or clips must be
<ol>
<li>specified by the ''Design Authority'',
<li>compatible with the material they contact,
<li>appropriately sized, in both length and thread type, for the material to which they will be secured, and
<li>corrosion-resistant screws with a low-profile head.
</li></ol>
</li></ol>

====9.2.1.5.{{hilite | Clips {{hilite | and Bearing Plates || 2025-January-31 }}|| 2022-February-5 }}====
(See [[Notes to ASM Standard#A-9.2.1.5.| Note A-9.2.1.5.]])

<ol>
<li>Clips must be
<ol>
<li>{{strike| proprietary (not shop fabricated) || 2024-February-1 }} {{hilite | engineered || 2025-January-31 }} and must be acceptable to the roll form machine manufacturer, for use with Architectural Sheet Metal Roof Systems, and
<li>compatible with the metal panel and other materials they contact.
</li></ol>
<li>Attachment clips for Architectural Sheet Metal Roof Systems shall be manufactured with evenly spaced indents or guide holes for fastener placement, and {{strike| must || 2024-February-1 }} {{hilite | may || 2025-January-31 }} be formed from
<ol>
<li>Steel (Z275 or G90)(AZ50 or AZM150),
<li>Aluminum, or
<li>Stainless Steel.
</li></ol>
<li>{{hilite | Bearing plates shall be || 2025-January-31 }}
<ol>
<li>{{hilite | sufficiently rigid to resist distortion in service, and || 2025-January-31 }}
<li>{{hilite | engineered and suitable to support all expected loads, including compression loads || 2025-January-31 }}.
</li></ol>
</li></ol>

===={{hilite | 9.2.1.6. {{strike| Bearing Plates and || 2024-February-1 }} EPDM Pads || 2025-January-31 }}====

<ol>
{{strike| <li>{{hilite | Bearing plates shall be || 2023-June-16 }}
<ol>
<li>{{hilite | manufactured from corrosion-resistant steel, || 2023-June-16 }}
<li>{{hilite | of sufficient gauge to resist distortion under load, conforming to the engineered shop drawings, || 2023-June-16 }}
<li>{{hilite | formed with recesses for fasteners, || 2023-June-16 }} and
<li>{{hilite | press-formed to bevel the edges, for load distribution over the substrate. || 2023-June-16 }}
</li></ol> || 2024-February-1 }}
<li>{{hilite | EPDM pads used to support panel clips|| 2021-June-30 }}
<ol>
<li>{{hilite | must be sufficiently dense and thick (after compression)|| 2021-June-30 }}
<ol>
<li>{{hilite | to equal the thickness of the ventilation layer (Ref. [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]),|| 2021-June-30 }} and
<li>to resist curling when placed under load.
</li></ol>
<li>shall extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
</li></ol>

====9.2.1.7. {{hilite |Sealants|| 2022-February-5 }}====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</li></ol>
<li>Sealants shall conform to any one of the following standards:
<ol>
<li>CGSB 19-GP-5M, "Sealing Compound, One Component, Acrylic Base, Solvent Curing"
<li>CAN/CGSB-19.13, "Sealing Compound, One Component, Elastomeric, Chemical Curing"
<li>CGSB 19-GP-14M, "Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing"
<li>CAN/CGSB-19.24, "Multi-Component, Chemical Curing Sealing Compound"
</li></ol>
</li></ol>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the roof surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1., "Use of Accepted Materials"]]).
<li>The ''Contractor'' must retain factory packaging or provide other adequate covering for metal panels, to protect them from condensation between adjacent surfaces, until the panels are installed.
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Roof Panel Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer''.
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite | be constructed only with RoofStar-accepted panels secured by hidden clips; flange-fastened panels are not permitted|| 2022-February-5 }}.
</li></ol>
</li></ol>

===9.3.2. All Systems===
===={{hilite | 9.3.2.1. Preparation of Substrate || 2023-June-16 }}====

<ol>
<li>All supporting decks must be acceptable to the ''manufacturer'' and must be
<ol>
<li>made suitable for roofing by others (trades other than the ''Contractor''),
<li>dimensionally stable,
<li>structurally sound,
<li>capable of accommodating ''roof system'' component movement,
<li>clean,
<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[ASM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
<li>reasonably smooth and free of abrupt elevation changes, and
<li>absolutely free of
<ol>
<li>dust,
<li>dirt,
<li>voids,
<li>open cracks,
<li>sharp projections,
<li>contaminants,
<li>objectionable surface treatments,
<li>laitance (concrete must be “native”),
<li>oil, and
<li>grease
</li></ol>
</li></ol>
<li>All concrete decks must cure at least 28 days before receiving adhered membranes, but this limitation may be reduced if both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record ("adhered", as used in this requirement, means fully or intermittently bonding any membrane to the deck with an adhesive, hot asphalt (bitumen), or heat),
<li>Plywood decks with cracks or loose knots must be filled or overlaid with plywood (See [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]).
<li>Joints between plywood deck panels must be prepared and reinforced according to the manufacturer’s published requirements.
<li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
</li></ol>

====9.3.2.2. Preparation of Roofing Materials====

<ol>
<li>{{hilite | Roofing materials must be prepared for installation as required by the ''manufacturer''. || 2023-June-16 }}
</li></ol>

====9.3.2.3. General Requirements for Panel Installation====

<ol>
<li>Panels must be handled with non-marring slings and hoisted using a spreader bar.
<li>Sheet steel, copper, and zinc roof panels must be installed with a continuous minimum tolerance gap of 1/8” between the heels of the panels.
</li></ol>

====9.3.2.4. Panel Securement and Seams====

<ol>
<li>Panels must be secured to resist
<ol>
<li>{{hilite | ''Specified Wind Loads'' calculated for the ''roof system'' and shall conform to the specified design for the ''roof assembly'', and || 2023-June-16 }}
<li>{{hilite |gravitational (drag) loads|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All panels must be secured to a firm support, and when clips are used to secure metal panels, the clips must be firmly supported by the roof deck, bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' || 2023-June-16 }} (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>{{hilite | Clips that are unsupported by EPDM pads must be sealed against water intrusion by embedding the clips in a compatible sealant (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
<li>Unless otherwise permitted by the '''''Guarantor''''', clips must be attached by at least two fasteners (Ref. [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>Concealed fasteners shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and should provide clearance for the underside of the metal panel.
<li>Seam height shall conform to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }} of this Part.
<li>{{hilite | Where sealant is required in panel seams (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}), it shall be applied to evenly engage the top of the seam where panels join, as illustrated in '''Figure 9.3.2.4.-A.''' || 2025-January-31 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.3.2.4.-A Butyl Sealant in Seams''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 9.3.2.4.(7) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:ASM Figure 9.3.2.4.-A.png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6b/ASM_Figure_9.3.2.4.-A.png | 500 px]]
|}

====9.3.2.5. Panels Over Ventilation Materials or Voids====
(See [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])

<ol>
<li>When the roof is designed and constructed with {{hilite | a void or ventilation materials immediately beneath the metal panels, panels must be secured using|| 2021-June-30 }}
<ol>
<li>standard-height clips (matching the height of panel seams), which must be {{strike| fully supported || 2024-January-25 }} {{hilite | installed || 2025-January-31 }} {{hilite | on engineered bearing plates fully supported by appropriately sized || 2025-January-31 }} closed-cell {{hilite | EPDM {{strike| foam || 2024-January-24 }} pads|| 2025-January-31 }}, or
<li>{{hilite |tall clips, which must be|| 2021-June-30 }}
<ol>
<li>{{hilite |fabricated to match the combined height of the {{hilite | bearing plate || 2025-January-31 }}, EPDM {{strike| foam || 2024-January-24 }} pad, and the panel seam,|| 2021-June-30 }}
<li>secured with fasteners into their supports, and
<li>fully embedded in a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7., "Sealants"]]).
</li></ol>
</li></ol>
<li>EPDM foam pads employed to support standard-height panel clips are not a RoofStar-accepted material but nevertheless must
<ol>
<li>be fabricated with sufficient density and thickness (after compression) to equal the thickness of the ''ventilation layer'', and
<li>extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath panels that are not supported by a ''ventilation layer'', panels shall be supported by tall clips secured in keeping with the requirements in this Part|| 2021-June-30 }}.
</li></ol>

====9.3.2.6. Panel Terminations====

<ol>
<li>Metal panels must be secured at, {{hilite | and engaged to|| 2021-June-30 }}, the eaves by a continuous metal hook strip (see [http://rpm.rcabc.org/index.php?title=ASM_10.1.1_Eave_%26_Rake_Flashing_(Mechanical_Seam) ASM 10.1.1 Eave & Rake Flashing (Mechanical Seam)]).
<li>{{hilite | All panel terminations at the top of a slope must be|| 2021-June-30 }}
<ol>
<li>turned up (bread-panned) to {{hilite | match the panel seam|| 2021-June-30 }} height, and shall not be cut, and
<li>{{hilite |flashed with a positively shedding cap, hip or ''wall'' flashing (see [[#10.3.4. Perimeter Details, Walls, and Openings | Subsection 10.3.4., "Perimeter Details, Walls, and Openings"]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |When panels terminate at the top of a ''common slope'' or ''low slope'' roof (slopes up to and less than 1:1 (12” in 12”)), they must be closed with additional metal Z-closure|| 2021-June-30 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened to the metal roof panel, or fastened through the panel into the ''deck'' when the fasteners also serve as drag load securement|| 2021-June-30 }}.
</li></ol>
</li></ol>

====9.3.2.7. Reserved====
====9.3.2.8. Curved Panels====
(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])

<ol>
<li>All panels manufactured for a curved substrate
<ol>
<li>must be supported by a Variance issued by the '''''Guarantor''''' prior to tender (see [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>must be power-curved as a continuous panel, without segments,
<li>shall be manufactured with seams conforming to [[#9.1.3.3. Panel Seams | Article 9.1.3.3.]], and
<li>must continuously cover a curved substrate (segmented panels are not permissible).
</li></ol>
<li>Roofs constructed with curved panels must incorporate a ventilation space in keeping with [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]
</li></ol>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify {{hilite | the connections between the ''roof system'' and ''walls'' or other building components, particularly where the continuity of air, vapour and water-resistive layers is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]|| 2021-October-30 }}).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>{{hilite | Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Where the roof deck and an adjoining wall are constructed of dissimilar materials (i.e., steel deck joined to concrete wall), differing expansion and contraction rates for the two materials may adversely affect the roof system and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular roof-wall intersection || 2023-June-16 }} (See [[Notes to ASM Standard#A-10.1.3.1. | Note A-10.1.3.1. ]]).
<li>{{hilite | When EIFS cladding is cut to permit roofing work, the exposed insulation must be restored with back-wrapped mesh, a base coat and finish coat, or with another method that is equal or superior|| 2022-October-22 }} (See [[Notes to ASM Standard#A-10.1.2.2| Note A-10.1.2.2]]).
<li>Fascia may be covered with metal flashing and specified as part of the ''roof system''.
</li></ol>

====10.1.3.2. Flashing====

<ol>
<li>All changes in plane in the ''roof system'', and all intersections between the roof field and roof edges, ''walls'', or ''parapets'', must be flashed with {{hilite | material conforming to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]] {{strike| self-adhering sheet membrane eave protection, and with metal flashing || 2023-January-26 }}
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings designed for ''common slope'' and ''low slope'' roofs (slopes up to and including 1:1 (12” in 12”)) must be secured with hooked metal Z-closures which are || 2021-June-23 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Cap and hip flashings designed for ''steep slopes'' (roofs with a slope greater than 1:1 (12” in 12”)) may be|| 2021-June-30 }}
<ol>
<li>{{hilite | secured with metal Z-closures installed in keeping with the requirements in [[#10.3.4.1. Ridges | Article 10.3.4.1.]]|| 2021-June-30 }}, or
<li>{{hilite | secured to the standing seams with acceptable fasteners (flashing may be turned down between panel ribs to close off openings, to provide further protection from the weather)|| 2021-June-30 }}.
</li></ol>
</li></ol>

====10.1.4.2. Eave and Rake Edges====

<ol>
<li>Eave and rake edge details shall
<ol>
<li>be designed to resist wind uplift loads, and shall conform to the requirements in [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]], and
<li>{{hilite | permit the drainage of any liquid water out of the roof system (Ref. || 2023-October-28 }} [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====10.1.4.3. Walls====

<ol>
<li>Roof-to-wall flashings must
<ol>
<li>be engineer-designed to resist wind uplift, and
<li>allow for expansion and contraction.
</li></ol>
<li>All connecting flashings must be firmly secured
<ol>
<li>{{hilite |to a ''wall'' using a concealed continuous clip fastened at intervals not exceeding 304.8 mm (12”) O.C. (exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite |to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape, and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
</li></ol>

====10.1.4.4. Reserved====
====10.1.4.5. Windows and Wall Openings====

<ol>
<li>{{hilite | Windows and other wall openings adjacent an Architectural Sheet Metal Roof System shall conform to the relevant requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", || 2023-June-16 }} [[SBS_Roof_Systems_Standard#10.1.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.1.4.5.]].
</li></ol>

===10.1.5. Valleys===
====10.1.5.1. {{hilite | General Requirements for Valleys || 2026-February-1 }}{{strike| Valley Protection Membrane || 2025-February-1 }}====

<ol>
<li>{{hilite | Valleys should not terminate downslope at a wall or curb || 2026-February-1 }}.
<li>{{hilite | When the slope of a valley is less than 1:6 (2” in 12”) the ''Design Authority'' should consider designing the valley with a waterproofing membrane system rather than with a self-adhering underlayment and metal valley flashing || 2026-February-1 }} {{hilite | (See|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) (Metal Panels and the Coefficient of Thermal Expansion) | {{hilite | Note A-10.1.5.1.(2)|| 2026-February-1 }}]]).
{{strike| <li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]] || 2025-February-1 }}
</li></ol>

====10.1.5.2. Valley {{hilite | Protection || 2026-February-1 }}{{strike| Flashing || 2025-February-1 }}====

<ol>
<li>All valleys must be designed with both membrane flashing and metal valley flashing.
<li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]]
<li>Metal flashing must
<ol>
<li>incorporate a divider measuring at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider, and
<li>be secured to resist gravitational ("drag") loads.
</li></ol>
<li>Metal valley flashing shall be at least 127 mm (5") wide, measured between the divider and the edge of the metal roof panel, and may be either hooked or unhooked (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]).
</li></ol>

====10.1.5.3. Valleys for Heavy Snow Loads====

<ol>
<li>In regions with high snow loads, the minimum valley width should be increased and flared to widen at the eave (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]], and [[#10.1.5.1. Valley Protection Membrane | Article 10.1.5.1.]]).
</li></ol>

====10.1.5.4. Reserved====
====10.1.5.5. {{hilite | Crickets and|| 2026-February-1 }} Dead Valleys====
{{hilite | (See '''Figure 10.1.5.5.-A''' and '''Figure 10.1.5.5.-B''')|| 2026-February-1 }}

<ol>
<li>{{hilite | When terminating a valley at a ''wall'' or ''curb'' is unavoidable, the design must incorporate a cricket covered with a ''waterproofing roof system'', to divert water off the roof|| 2026-February-1 }}.
<li>{{hilite | Dead valleys should be avoided|| 2023-June-16 }}{{hilite |, but {{hilite | when a cricket is not practicable and|| 2026-February-1 }} roof slope terminates in a dead valley, it must be designed as a ''waterproofing roof system'' {{strike| the design must conform to the Application requirements in || 2023-June-16 }} [[#10.3.5.7. Dead Valleys | Article in 10.3.5.7.]] || 2025-February-1 }}
<li>{{hilite | All ''waterproofing roof systems'' used on crickets or in dead valleys must be carried up the vertical face of ''wall'' and ''curbs'' at least 304.8 mm (12”) when measured vertically from the ''drainage plane'', and any ''wall'' finishes must be terminated at least 203.2 mm (8”) above the cricket or dead valley, when measured vertically from the ''drainage plane'' || 2026-February-1 }} (See [[#10.3.5.7. Dead Valleys | {{hilite | Article in 10.3.5.7.|| 2026-February-1 }}]] and [[#10.3.7.2. Intersections with Waterproofing Roof Systems | {{hilite | Article 10.3.7.2.|| 2026-February-1 }}]]).
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5.-A Crickets and Dead Valleys''' Forming Part of Sentence 10.1.5.5.(1) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5-B Crickets and Waterproofing to Improve Drainage''' Forming Part of Sentence 10.1.5.5.(2) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 10.1.5.5.-A.png | link=https://rpm.rcabc.org/images/0/0e/ASM_Figure_10.1.5.5.-A.png | 400 px]] || [[File:ASM Figure 10.1.5.5.-B.png | link=https://rpm.rcabc.org/images/5/51/ASM_Figure_10.1.5.5.-B.png | 400 px]]
|}

==={{hilite | 10.1.6. Expansion and Control Joints || 2024-October-20 }}===
====10.1.6.1. Reserved====

====10.1.6.2. Control Joints====

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (roof dividers), and
<li>to specify their location and design.
</li></ol>
<li>{{hilite | Unless otherwise approved by the '''''Guarantor''''', ''control joints'' must be specified to divide a new ''roof system'' (addition) from existing ''roof systems'' || 2023-June-16 }} (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Roof Systems===
====10.1.7.1. Intersections with Waterproofing Roof Systems====

<ol>
<li>Intersections with ''water-shedding roofs'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Intersections with Membrane Gutters====

<ol>
<li>Refer to [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membrane====

<ol>
<li>{{hilite | Where a self-adhered membrane is required for flashing, it shall conform to the requirements for eave and valley protection in || 2024-January-31 }}{{hilite | {{strike| See || 2023-January-25 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] {{strike| for sheet membrane requirements. || 2023-January-26 }}|| 2021-June-30 }}
<li>{{hilite | Where the ''roof assembly'' adjoins a ''wall'', the ''wall'' must be flashed to provide continuity with the wall ''control layers'', and with the ''roof system'' underlayment using materials accepted by the '''''Guarantor''''' and having the following properties: || 2024-January-31 }}
<ol>
<li>{{hilite | When the primary slope of the roof is less than 1:6 (2" in 12"), flashing must be a self-adhered membrane with a minimum thickness of 3 mm (118 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is 1:6 (2" in 12") or greater but less than 1:3 (4" in 12"), flashing must be an exterior-reinforced self-adhered membrane with a minimum thickness of 1 mm (39 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is greater than 1:3 (4" in 12"), flashing material may be self-adhered or nail-applied. || 2024-January-31 }}
</li></ol>
{{strike| <li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm. || 2023-January-26 }}
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into roof perimeters and walls must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, ''Linear Metal Flashing'']]
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''linear metal flashing'' shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====
<ol>
<li>All wall surfaces to which roofing materials must be installed (including Concrete Masonry Unit (CMU)) must be declared suitable by the ''manufacturer'', or they must be covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membrane flashing shall be prepared following the ''manufacturer's'' published requirements.
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>All changes in plane in the ''roof assembly'' must be waterproofed beneath metal flashing with a self-adhering eave protection sheet membrane acceptable to the '''''Guarantor'''''.
<li>''Projects'' must follow proper sequencing so that materials, ''systems'', or ''assemblies'', installed by the ''Contractor'' correctly interface with materials, ''systems'', or ''assemblies'' installed by other trades, to establish or preserve continuity and ensure positive waterproofing connections (overlapping, “shingle fashion”).
<li>When coordination with other trades requires some adaptation to the requirements in this Standard, any variance to proper detail sequencing must be approved in writing by the ''Design Authority''.
<li>{{hilite | All sheet membrane flashing must be installed to conform to the ''manufacturer's'' published instructions, and must|| 2021-October-30 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]],
<li>{{hilite | be ''fully bonded'' to an acceptable substrate,|| 2021-October-30 }}
<li>{{hilite | be installed without fish-mouths or wrinkles|| 2021-October-30 }},
<li>{{hilite | be hand-rolled with a ''manufacturer’s'' accepted roller and ''fully bonded'' to an acceptable, prepared substrate|| 2021-October-30 }},
<li>be reinforced at all inside and outside corners with membrane gussets, measuring at least 101.6 mm x 152.4 mm (4” x 6”), excluding the tapered ends,
<li>overlap any wall membranes or finishes by at least 50.8 mm (2”), and
<li>underlap any wall membranes or finishes by at least 76.2 mm (3").
</li></ol>
<li>{{hilite | The upper termination of sheet membrane flashing must be protected from damage, and from water intrusion, || 2023-June-16 }}
<ol>
<li>{{hilite | with linear metal flashing installed in keeping with || 2023-June-16 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]], or
<li>{{hilite | with a wall finish installed by others. || 2023-June-16 }}
</li></ol>
<li>When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination.
<li>When sheet membrane flashing is mechanically secured with a termination bar or a metal flashing, fasteners must be spaced no more than 304.8 mm (12”) O.C.
<li>When a second metal flashing is installed to protect a termination bar or flashing used to secure the sheet membrane flashing, it may be fastened no more than 609.6 mm (24”) O.C., provided the ''linear metal flashing'' maintains continuous contact with the substrate.
<li>When closer fastener spacing is required by the ''manufacturer'', the wall must be constructed or modified to facilitate solid fastener securement.
<li>''Linear metal flashings'' must be secured in keeping with the requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]]
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>Membrane flashing must be protected from damage with full-coverage ''linear metal flashing''.
</li></ol>

===10.3.3. Reserved===
===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings installed on slopes 1:6 (2" in 12") up to and less than 1:1 (12” in 12”)|| 2021-June-30}} must be hooked to metal Z-closures which are
<ol>
<li>set in two (2) rows of gunnable sealant or sealant tape, and
<li>fastened through the metal roof panel into the deck.
</li></ol>
<li>{{hilite | Cap and hip flashings installed on roofs with a slope greater than 1:1 (12” in 12”) (''Steep Slopes'') may be|| 2021-June-30}}
<ol>
<li>{{hilite | hooked to a metal Z-closure|| 2021-June-30}}, and
<li>{{hilite | mechanically fastened to the standing seam with an acceptable fastener|| 2021-June-30 }}.
</li></ol>
<li>For roof slopes
<ol>
<li>up to 2:3 (8” in 12”), metal cap/hip flashing must extend a minimum of 152.4 mm (6") over metal roof panels, measured from the back pan, and extending on each side of the ridge/hip.
<li>equal to or greater than 2:3 (8” in 12”), the metal cap/hip flashing may be reduced by 76.2 mm (3”) over metal roof panels, measured from the back pan and extending on each side of the ridge/hip.
<li>greater than 1:1 (12” in 12”), an underlying support at the centre of the ridge is required to support the ridge cap flashing.
</li></ol>
</li></ol>

====10.3.4.2. Eaves and Rake Edges====
(See Construction Detail [[ASM Eave and Rake Edges (Mechanical Seams) | "Eave and Rake Edges (Mechanical Seams)"]])

<ol>
<li>All linear metal flashing installed at the eave or rake edges must
<ol>
<li>be completely separated from a wood ''deck'' with eave protection sheet membrane (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]), and
<li>allow for metal panel expansion and contraction.
</li></ol>
<li>Eave protection sheet membrane installed to separate eave and rake edge metal flashing from a wood ''deck'' shall extend past the edges of a flashing by at least 6.35 mm (1/4").
<li>Eave metal flashing
<ol>
<li>must be fabricated to secure the eave edge of the panel in place,
<li>shall extend onto the sloped ''deck'' or supporting member at least 76.2 mm (3”),
<li>shall be secured
<ol>
<li>along the top flange with screws spaced in accordance with the engineered design but no further apart than 304.8 mm (12”) O.C.,
<li>on the fascia metal flashing, utilizing a continuous clip fastened a maximum of 304.8 mm (12") O.C., and
<li>shall be covered with eave protection sheet membrane.
</li></ol>
<li>When external metal gutters are installed (See [[#11.3.3.9. External Gutters | Article 11.3.3.9.]]), linear metal eave flashing with a face less than 50.8 mm (2”) do not require a clip but must be securely fastened with an alternative method acceptable to ''Design Authority''.
</li></ol>
<li>Rake edge metal flashing must be firmly secured
<ol>
<li>{{hilite | to a ''wall'' using a concealed continuous clip fastened a maximum of 304.8 mm (12”) O.C. (Ref. [[#Part 13 - Linear Metal Flashing | Part 13]] for clip requirements; exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite | to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Where external metal gutters will be installed, the eave metal flashing should be installed to accommodate the gutter and hangar.
<li>When gutter hangars are to be fastened behind the eave flashing, the eave flashing does not require a continuous clip and may be face-screwed together with the gutter hangar.
</li></ol>
</li></ol>

====10.3.4.3. Reserved====
====10.3.4.4. Reserved====
====10.3.4.5. Windows and Wall Openings====

<ol>
<li>Windows and other wall openings that intersect with the ''roof system'' shall be flashed with membrane and metal conforming to the requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.3.4.5.]]
</li></ol>

===10.3.5. Valleys===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.5.1. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membrane must be installed in keeping with the requirements in [[#8.3.2.2. Valley Protection | Article 8.3.2.2.]]|| 2021-June-30 }}
</li></ol>

====10.3.5.2. General Requirements for Valley Metal Flashing====

<ol>
<li>Drag load fastening is mandatory on all valleys.
<li>Metal valley panels must
<ol>
<li>be installed shingle fashion,
<li>overlap the adjacent lower panel at least 203.2 mm (8"), and
<li>be sealed at the lapped joint with two horizontal rows of approved sealant.
</li></ol>
<li>Valley dividers are required and must be at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider.
<li>Exposed valleys must be at least 254 mm (10") wide (no less than 127 mm (5") per side, measured from the divider to the metal roof panel); wider valleys are recommended in high snow load areas (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]] and [[#10.1.5.3. Valleys for Heavy Snow Loads | Article 10.1.5.3.]]).
<li>{{hilite | Metal valley sections (hooked or unhooked) || 2023-June-16 }}
<ol>
<li>must overlap the section immediately down-slope at least 203.2 mm (8"),
<li>shall be embedded in at least two rows of an acceptable sealant or butyl tape where they overlap,
<li>shall be secured in keeping with the specified design, and
<li>shall be flashed ("stripped in") and sealed to the ''valley protection'' membrane with eave protection sheet membrane conforming to [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<ol>
<li>measuring at least a 304.8 mm (12”) in width, and
<li>applied to extend past the flashing fasteners by at least 38.1 mm (1-1/2”).
</li></ol>
</li></ol>
<li>Reverse laps must be sealed with a membrane-compatible sealant.
</li></ol>

====10.3.5.3. Hooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.1_Hooked_Valley_Flashing ASM 10.3.1 Hooked Valley Flashing])

<ol>
<li>Hooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.3. Hooked Metal Valleys | Article 10.3.5.3.]],
<ol>
<li>be fabricated with a built-in hook strip returned 38.1 mm (1-1/2") to
<ol>
<li>form a water cut-off, and
<li>hook onto the valley metal panel, and
</li></ol>
<li>incorporate a flange measuring at least 76.2 mm (3”) wide, to secure the metal valley flashing to its substrate.
</li></ol>
</li></ol>

====10.3.5.4. Unhooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.2_Unhooked_Valley_Flashing ASM 10.3.2 Unhooked Valley Flashing])

<ol>
<li>Unhooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.4. Unhooked Metal Valleys | Article 10.3.5.4.]],
<ol>
<li>be hemmed with a return measuring at least 38.1 mm (1-1/2") to form a water cut-off, and
<li>secured with continuous cleats
<ol>
<li>be fabricated from 26-gauge flat metal stock (min. thickness), and
<li>be fabricated with a leg measuring at least 76.2 mm (3”) wide.
</li></ol>
</li></ol>
</li></ol>

====10.3.5.5. Reserved====
====10.3.5.6. Reserved====
====10.3.5.7. Dead Valleys====

<ol>
<li>Dead valleys must be
<ol>
<li>waterproofed to conform to the requirements for membrane gutters (See [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]), and
<li>sloped at least 1:50 (2%, or 1/4” in 12”), to positively drain
<ol>
<li>into one or more roof drains{{hilite |, or || 2021-February-7 }}
<li>onto a lower ''water-shedding'' roof.
</li></ol>
</li></ol>
<li>{{hilite | Transitions from a dead valley to the metal panel system must conform to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]], and where a wall is present, a diverter shall be incorporated to protect the ''wall system''.|| 2021-February-7 }}.
</li></ol>

===10.3.6. Reserved===

===10.3.7. Intersections with Other Roof Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where two ''roof systems'' intersect, materials must be compatible with each other, or must be separated from contact by an intermediate separation layer.
</li></ol>

====10.3.7.2. Intersections with Waterproofing Roof Systems====

<ol>
<li>When a ''waterproofing roof system'' transitions down a slope onto a lower ''water-shedding roof system'', the ''waterproofing roof system'' membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the maximum water level,
<li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'', or
<li>304.8 mm (12”) plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'' or maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing roof system'' sheet membrane flashing on the slope must be mechanically secured, separately from the water-shedding ''roof system'',
<li>''underlayment'' must overlap the ''waterproofing roof system'' sheet membrane flashing by no less than 101.6 mm (4”),
<li>{{hilite |metal panels must overlap the ''waterproofing roof system'' sheet membrane flashing by at least 152.4 mm (6”) (A metal counter-flashing with an exposure of at least 101.6 mm (4”) is required at the bottom termination of the metal panels|| 2021-June-30}}), and
<li>fasteners for the ''water-shedding roof system'' must be at least 203.2 mm (8”) above the ''finished system surface'' of the ''waterproofing roof system'' (when measured vertically), or 304.8 mm (12”) for regions with heavy snow.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Intersections with Membrane Gutters====

<ol>
<li>Refer to the requirements in [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</li></ol>

===10.3.8. Reserved===

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=

==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary roof drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''roof assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a drain leader and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and
<li>{{hilite |which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.|| 2020-July-3 }}
</li></ol>
<li>''Primary roof drain'' means the primary means of draining water from the roof.
<li>''Roof drain'' means “A fitting or device that is installed in the roof to permit storm water to discharge into a ''leader''.” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("Scupper") means an open or closed roof drain that conveys water laterally from one roof area to another, or from the roof directly to the exterior of the building.
<li>''Secondary roof drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary roof drain''. An ''overflow drain'' is a type of ''secondary roof drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 15-year Guarantee''''' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
<li>The ''Design Authority'' is responsible for the design of roof drainage.
<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} {{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }} {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
<li>{{hilite |The size (flow rate) of roof drains and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }} {{hilite | (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location)|| 2027-February-1 }}.
<li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li>drain type, size, flow rate, and
<li>size and placement of the ''overflow drain''.
</ol></li>
<li>{{hilite |The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation) || 2021-October-23 }}
<ol>
<li>roof slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>{{hilite | the location of the ''drainage plane''|| 2021-October-30 }} {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished system surface'', {{hilite | and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design|| 2021-October-30 }}).
</li></ol>
<li>Roofs may drain off a roof edge, or by means of internal plumbing (both are permissible under the '''''RoofStar Guarantee Program''''').
<li>When a roof is designed to drain off an edge, water may drain freely, it may be diverted to a lower roof area, or it may be collected and diverted into a drainage system (plumbing) by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]).
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.
<li>When a roof is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow restrictor is present in an existing cast drain leader, the restrictor should be reinstalled.
</li></ol>

====11.1.3.2. Roof Drain Function and Location====

<ol>
<li>Roof drains must be used only for draining water.
<li>''Roof drains'' on new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>When existing ''roof drain'' and penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3.,"All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast-iron Roof Drains====

<ol>
<li>Only cast-iron roof drains, and existing external couplers used to connect drains to leaders, may be re-used for roof replacement ''projects''.
<li>Drain extensions for cast-iron roof drains should be avoided, since the connection with the cast drain is not sealed; the result is a leak into the roof system.
</li></ol>

====11.1.4.2. Scuppers and Overflows====
(See [[Notes to ASM Standard#A-11.1.4.2. | Note A-11.1.4.2.]])

<ol>
<li>A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}..
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the roof, in the event of ''primary roof drain'' failure.
<li>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be
<ol>
<li>located no higher than 101.6 mm (4”) above {{hilite | the ''drainage plane''|| 2021-October-30 }},
<li>situated so that they freely and visibly discharge storm water, and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====11.1.4.3. Membrane Gutters====
(See [[Notes to ASM Standard#A-11.1.4.3. | Note A-11.1.4.3.]])

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' {{hilite | (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) || 2023-June-16 }} only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>{{hilite | The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to|| 2020-July-3 }}
<ol>
<li>{{hilite | rainfall and snow load calculations for the building location|| 2020-July-3 }},
<li>{{hilite | drain type, size, and flow rate|| 2020-July-3 }}, and
<li>{{hilite | size and placement of the ''overflow drain''|| 2020-July-3 }}.
</li></ol>
<li>New membrane ''gutters'' shall be designed with a minimum width of 304.8 mm (12”) and a depth not exceeding the ''gutter’s'' width.
<li>At least 101.6 mm (4") clearance on the horizontal plane is required between any membrane ''gutter'' wall and the
<ol>
<li>the edge of the drain bowl for spun drains, and
<li>the edge of the drain leader for flat spun or welded drains.
</ol></li>
<li>Only fully-adhered membranes may be used in membrane ''gutters''.
<li>Metal ''gutter'' liners are permissible, provided they are designed to fit over acceptable waterproofing, and the liners conform to the material requirements in [[#11.2.1.3. Membrane Gutters and Gutter Liners | Article 11.2.1.3.]]
<li>''Conventionally insulated systems'' that drain into a membrane ''gutter'' must abut solid blocking at the ''gutter'' edge, which provides
<ol>
<li>a stop for the insulation ''assembly'', and
<li>a solid substrate for the securement of flashings and membranes.
</ol></li>
<li>An ''overflow drain'' must be located at least
<ol>
<li>101.6 mm (4”) above the primary membrane ''gutter'' drain, and
<li>25.4 mm (1”) below any mechanical fasteners used to secure the adjoining ''roof system''.
</ol></li>
<li>In roof replacement applications, existing membrane ''gutters'' may qualify for a '''''RoofStar Guarantee''''', but should be redesigned if their capacity is undersized, and must incorporate an overflow drain in keeping with the requirements in this Part.
<li>Where the primary drain in an existing membrane ''gutter'' is undersized for its capacity, the primary drain must be replaced with one that is properly sized.
<li>When a membrane ''gutter'' adjoins a RoofStar-guaranteed ''water-shedding system'', the transition from gutter to ''roof system'' shall conform to [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</ol></li>

====11.1.4.4. External Gutters====

<ol>
<li>{{hilite | External gutters and downspouts are not covered by the '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | Notwithstanding other requirements in this Part, when a roof drains onto another roof, the drainage of water must be controlled to eliminate or mitigate damage from water flow || 2021-June-22 }}; {{hilite | the use of splash pads, when appropriate for the location, is strongly recommended|| 2021-June-30 }}.
<li>{{hilite |Downspouts, installed by the ''Contractor'' or other trades and laid directly against the slope of the roof to connect an upper roof drainage to lower gutters, is acceptable under the '''''RoofStar Guarantee Program''''', provided the material is strongly secured both at the top and the bottom, and the issue of dissimilar metal corrosion can be eliminated|| 2021-June-30 }}.
</li></ol>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>{{hilite | Except for cast-iron roof drains, which are usually supplied and installed by others, only new drains and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>{{hilite | All roof drains and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''|| 2026-July-1 }}.
<li>Reuse of any penetration flashing or drain (except serviceable cast iron drains) is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]])|| 2021-February-5 }}.
<li>{{hilite | Where drains or overflows are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}.
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to ASM Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All roof drains
<ol>
<li>must be designed and manufactured for roof applications only, and shall not be floor drains, and
<li>shall be made so that the roof membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast-iron ''primary roof drains''
<ol>
<li>must be supplied with a sump receiver and under-deck clamp,
<li>should separate securement of the under-deck clamp and clamping ring from securement for the strainer, and
<li>{{hilite | must be installed by the trade supplying the roof drain. || 2023-June-16 }}
</li></ol>
<li>{{hilite | Cast-iron ''scupper drains'' must be || 2023-June-16 }}
<ol>
<li>{{hilite | supplied with a clamping strainer, || 2023-June-16 }} and
<li>{{hilite | designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable). || 2023-June-16 }}
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li> must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li> must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>should incorporate a clamping ring (a clamping ring is recommended for ''primary flanged insert drains'' specified on any ''project''), but clamping rings are required when ''primary flanged insert drains'' are specified for a '''''RoofStar 15-year Guarantee'''''.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that connect with plumbing inside the building|| 2026-July-1 }} (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that drain directly to the exterior of the building|| 2026-July-1 }} (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the drain to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the scupper,
<ol>
<li>equal in capacity to the main drain leader opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>{{hilite | must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but || 2026-July-1 }}
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>{{hilite | may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and|| 2026-July-1 }}
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.{{strike|, and || 2025-May-29 }}
</li></ol>
</li></ol>

====11.2.1.3. Membrane Gutters and Gutter Liners====

<ol>
<li>Membrane gutter membranes shall be
<ol>
<li>accepted by the '''''Guarantor''''',
<li>acceptable to the ''manufacturer'',
<li>compatible with the adjoining ''roof system'', and
<li>manufactured for full adhesion (semi-adhesion and mechanical securement are not permissible).
</ol></li>
<li>A reinforced liquid membrane systems (PMMA or PUMA) approved for field use and applied to an accepted SBS-modified base membrane is acceptable as a ''gutter'' membrane.
<li>A metal ''gutter'' liner
<ol>
<li>may be fabricated from
<ol>
<li>copper sheet material, incorporating soldered seams, or
<li>stainless steel, incorporating welded seams, and
</ol></li>
<li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</ol></li>
</ol></li>

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure the roof membrane and penetration flashings, or related accessories, must be
<ol>
<li>properly sized in accordance with ''roof system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>{{hilite | Only a RoofStar-accepted|| 2021-February-7 }} reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} liquid membrane flashing system may be used on the water plane to flash roof drains, scuppers, and overflows.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Roof Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Roof Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>Roof drains for new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The 304.8 mm (12”) spacing requirement for roof drains does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>Roof drains and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the drain.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All roof drains must be supplied and installed with a secured strainer to prevent debris from blocking the drain.
</ol></li>

====11.3.2.4. Membrane Flashing====

<ol>
<li>Drains must be flashed using the membrane specified and installed to waterproof a gutter, and shall be acceptable to the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} may be used on the ''drainage plane'' to flash roof drains, ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains and Membrane Gutters===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====
====11.3.3.2. General Requirements for Cast-iron Roof Drains====

<ol>
<li>Cast-iron roof drains must be installed by the plumbing/mechanical trade.
<li>When cast-iron roof drains are used, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain.
<li>Drain extensions for cast-iron roof drains should be avoided.
<li>Existing flow restrictors removed during roof construction should be reinstalled.
<li>All cast-iron roof drains must be
<ol>
<li>new or clean,
<li>unbroken (this applies to the clamping ring also), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The continuity of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast-iron Drains Installed with Lead Flashing====

<ol>
<li>Cast-iron roof drains installed with lead flashing shall conform to the requirements of Article 11.3.3.3. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.4. Cast-iron Drains Installed with Membrane Flashing====

<ol>
<li>Cast-iron roof drains installed with sheet membrane flashing shall conform to the requirements of Article 11.3.3.4. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Cast-iron roof drains retrofitting shall conform to the requirements of Article 11.3.3.5. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flange-type roof drain installation shall conform to the requirements of Article 11.3.3.6. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>''Scupper'' and ''overflow'' installation shall conform to the requirements of Article 11.3.3.7. in the Standard for the membrane used to waterproof their installation.
</li></ol>

====11.3.3.8. Membrane Gutters====

<ol>
<li>All ''gutter'' membrane construction shall conform to the requirements of Article 11.3.3.8. in the Standard for the membrane used in related waterproofing applications.
</ol></li>

====11.3.3.9. External Gutters====

<ol>
<li>When external gutters are attached to an Architectural Sheet Metal Roof System, they shall not interfere with the free movement of water or air away from the ''roof system''.
</ol></li>

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |be designed to utilize the split panel detail; flexible boot flashings secured with gasketed screws are not permitted|| 2022-February-5 }}, and
<li>{{hilite |specify two storm collars separated by no more than 76.2 mm (3”), for all penetration flashings that do not incorporate a settlement cap|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>{{hilite | Where a roof design includes openings through the ''roof assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall || 2024-June-15 }}
<ol>
<li>{{hilite | provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and || 2024-June-15 }}
<li>{{hilite | require a ''curb'' or an acceptable penetration flashing to enclose and seal each roof opening. || 2024-June-15 }} {{strike| must be enclosed and sealed with a ''curb'', or a penetration flashing || 2023-June-15 }}
</li></ol>
<li>{{hilite | Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others. || 2023-June-16 }}
<li>{{hilite | Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head|| 2020-July-3 }}.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration, and
<li>properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form a seal || 2023-January-25 }} {{hilite | around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2") || 2024-January-31 }}, or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration; the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>{{hilite | Cylindrical ("pipe-type") penetrations must be sealed with|| 2020-July-3 }}
<ol>
<li>{{hilite | the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,|| 2020-July-3 }}
<li>{{hilite | a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. "SBS" Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | 2-Part Retrofit Flashing (Cable Penetration)]])|| 2020-July-3 }}, or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Flexible boot flashings for pipe-type penetrations
<ol>
<li>may be used for penetrations up to 152.4 mm (6”) in diameter,
<li>should be located near the upper end of a slope for long panels,
<li>must not be located on the ''drainage plane'' when the roof slope is less than 1:6 (2” in 12”),
<li>must be located at or near the centre of metal roof panels, measured between the upstands, to avoid interference with standing seams or panel ribs, or in the alternative (when interference is unavoidable) on a raised panel above seam height,
<li>must be fastened with high-domed gasketed cladding screws placed no more than 38.1 mm (1-1/2") O.C., and
<li>must be set in a bed of sealant.
</li></ol>
</li></ol>

====12.1.3.2. Reserved====

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }}
<li>When a roof is replaced and existing penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, as specified in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</li></ol>

====12.1.3.4. Curbs and Sleepers====

<ol>
<li>The design and placement of curbs and sleepers shall be the responsibility of the ''Design Authority'', but shall in any event conform to the application requirements in [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]
<li>''Curbs''
<ol>
<li>must be designed for securement directly to the ''deck'' structure, or to intermediate blocking (they must not be situated on top of the ''roof system''), and
<li>shall be designed to achieve a minimum height of 203.2 mm (8”), measured from the surface of the ''drainage plane'' (not including panel seam upstands), or from the highest point of a ''curb cricket''.
</li></ol>
<li>''Curbs'' with a width
<ol>
<li>less than 914.4 mm (36”) may be designed with a ''cricket'' but require, as a minimum, a back-pan flashing,
<li>between 914.4 mm (36”) and 2438.4 mm (96") require an architectural metal ''cricket'' with rigid support, to prevent metal distortion, and
<li>greater than 2438.4 mm (96") must
<ol>
<li>be designed to divert and drain the anticipated volume of water above the ''curb'',
<li>incorporate a ''cricket'', fully supported with insulation or framing and designed to direct water and snow to either side of the ''curb'', and
<li>incorporate a waterproofed gutter membrane installed over the ''cricket'' (Also see [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3., ''Membrane Gutters'']]).
</li></ol>
</li></ol>
<li>A waterproofed gutter membrane around a ''curb''
<ol>
<li>shall have a minimum slope of 2%, along the up-slope face of the ''curb'', to direct water around the ''curb'' and toward the eaves,
<li>should be continuous along the sides of the ''curb'', as dictated by the ''curb'' size and roof slope, or fall, and
<li>must direct water onto the lower metal panels.
</li></ol>
<li>Equipment isolators are not considered part of the ''roof system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''Guarantee'''''.
</li></ol>

====12.1.3.5. Attic Ventilation====

<ol>
<li>{{hilite | See || 2027-February-1 }} [[#1.1.3.4. Ventilation |{{hilite | Article 1.1.3.4. "Ventilation" || 2027-February-1 }}]].
</li></ol>

{{strike| <ol>
<li>{{hilite | The design and selection of the ventilation system is the responsibility of the ''Design Authority'', and may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents,|| 2021-June-30 }}
<li>{{hilite | gable end vents,|| 2021-June-30 }}
<li>{{hilite | hip vents,|| 2021-June-30 }}
<li>{{hilite | static vents,|| 2021-June-30 }}
<li>{{hilite | ridge vents, and|| 2021-June-30 }}
<li>{{hilite | cupolas.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation|| 2021-June-30 }}
<ol>
<li>{{hilite | must meet the minimum requirements of the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]) (Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee''''')|| 2021-June-30 }}, and
<li>{{hilite | shall be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite |the slope of the roof|| 2021-June-30 }},
<li>{{hilite |the vented area|| 2021-June-30 }}, and
<li>{{hilite |the design and configuration of the roof structure|| 2021-June-30 }}, and
</li></ol>
<li>{{hilite | shall be provided for roofs over cathedral ceilings.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | are acceptable and are recommended for all areas with vaulted ceilings|| 2021-June-30}}.
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
</li></ol> || 2026-January-27 }}

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed to metal panels and should be designed for attachment to vertical surfaces only.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>{{hilite | See [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] for sheet membrane requirements.|| 2021-June-30 }}
<li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm.
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>{{hilite | manufactured from sheet metal conforming to the material requirements in || 2023-June-16 }} [[#Section 13.2. Materials | Section 13.2.]], {{hilite | when the flashing is custom-made or fabricated by the ''Contractor'', || 2023-June-16 }}
<li>{{hilite | compatible with the ''roof system'', || 2023-June-16 }}
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>{{hilite | of sufficient height to extend vertically (when measured from the up-slope base of the flashing upstand to the opening at the top) at least || 2022-October-22 }}
<ol>
<li>{{hilite | 203.2 mm (8”), for slopes 0 to 1:6 (2” in 12”) || 2022-October-22 }},
<li>{{hilite | 152.4 mm (6”), for slopes greater than 1:6 and equal to 1:3 (4” in 12”) || 2022-October-22 }}, or
<li>{{hilite | 101.6 mm (4”), for slopes greater than 1:3 || 2022-October-22 }}.
</li></ol>
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
<li>{{hilite | plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer. || 2023-June-16}}
</li></ol>
<li>{{hilite | In regions that experience high snow accumulations, penetration flashings taller than the stated minimums in this Article are strongly recommended || 2022-October-22 }}.
<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} {{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }} {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>{{hilite | must slope downward from the penetration approximately 45°,|| 2021-June-30 }}
<li>{{hilite | shall be at least 50.8 mm (2”) wide|| 2021-June-30 }},
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
<ol>
<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
</li></ol>
<li>{{hilite | Chimney chase caps must be || 2021-June-30 }}
<ol>
<li>{{hilite | galvanized metal conforming to the requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]|| 2021-June-30 }},
<li>{{hilite | fabricated with penetration collars at least 152.4 mm (6") in height|| 2021-October-30 }},
<li>{{hilite | soldered at all joints in the ''drainage plane''|| 2021-June-30 }}, and
<li>{{hilite | fabricated with slope to shed water|| 2021-June-30 }}.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing Systems Penetrations====

<ol>
<li>{{hilite | Lead plumbing vent flashings must each be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated with sheet lead material weighing no less than 14.65 Kg/m2 (3lb/sf)|| 2021-June-30 }},
<li>{{hilite | properly sized for the pipe|| 2021-June-30 }}, and
<li>{{hilite | supplied with a settlement cap made from the same materials (the inside collar of the settlement cap must fit vertically inside the pipe opening by at least 25.4 mm (1”))|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be|| 2021-June-30 }}
<ol>
<li>properly sized for the penetration, both in diameter and height,
<li>flexible or sloped to suit the roof slope, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Air Vents====
{{hilite | (See [[#Article 1.1.3.4. Ventilation | Article 1.1.3.4., "Ventilation"]]) || 2027-February-1 }}

<ol>
<li>{{hilite | Vents, regardless of their type, must be either|| 2021-June-30 }}
<ol>
<li>{{hilite | proprietary to, or privately labeled for, the panel manufacturer, or|| 2021-June-30 }}
<li>{{hilite | specifically accepted by the '''''RoofStar Guarantee Program''''' (See [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ridge vents must be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated from a compatible metal|| 2021-June-30 }},
<li>{{hilite | acceptable to the metal panel manufacturer|| 2021-June-30 }},
<li>{{hilite | suitable for slopes 1:4 and greater|| 2021-June-30 }}, and
<li>{{hilite | constructed with internal baffles to prohibit the intrusion of|| 2021-June-30 }}
<ol>
<li>{{hilite | insects|| 2021-June-30 }},
<li>{{hilite | vermin|| 2021-June-30 }},
<li>{{hilite | snow|| 2021-June-30 }}, and
<li>{{hilite | debris|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Natural air flow vents must be
<ol>
<li>Type B or C ventilators conforming to CAN3-A93-M82 (R2003), "Natural Airflow Ventilator for Buildings", and permanently marked with the standard number,
<li>tested by an accredited third party to verify compliance with the required Standard,
<li>fabricated from plastic or corrosion-resistant metal (painted or unfinished), and
<li>manufactured with a base flange that measures
<ol>
<li>at least 76.2 mm (3”) wide on the up-slope side of the flashing, or
<li>at least 50.8 mm (2”) along the vertical sides, and along the bottom side of the flashing.
</li></ol>
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |incorporate only the split panel detail for flashing penetrations (use of a flexible boot flashing secured with gasketed screws is not permitted)|| 2022-February-5 }}, and
<li>{{hilite |incorporate no fewer than two storm collars for each penetration flashing that does not include a settlement cap; each collar must be separated from the other by no more than 76.2 mm (3”)|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}====

<ol>
<li>All penetration flashing materials must be new.
<li>All penetrations must be flashed to seal the penetration where it passes through the deck and underlayment and must prevent water ingress at least 203.2 mm (8") above the ''finished system surface''.
<li>{{hilite | Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing|| 2021-June-30 }}
<ol>
<li>{{hilite | must be suitable for the slope and penetration|| 2021-June-30 }}, and
<li>{{hilite | must be properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form or permit a seal || 2023-January-26 }} around the penetration {{hilite | to permit a seal|| 2024-January-31 }}|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All penetration flashings suitable for application on an architectural metal panel ''roof system'' || 2026-February-1 }}
<ol>
<li>{{hilite | must be secured to the metal panel system with mechanical fasteners|| 2026-February-1 }},
<li>{{hilite | shall maintain a drainage space around all sides of at least 12.7 mm (1/2”) and shall not impede the flow of water along a panel|| 2026-February-1 }},
<li>{{hilite | shall be oriented to promote positive drainage, and|| 2026-February-1 }}
<li>{{hilite | shall be sealed to the panel or to split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for split pan requirements) with an acceptable sealant applied to both the underside of a flange and around its edges|| 2026-February-1 }}.
</li></ol>
<li>A flexible boot flashing {{hilite | may be|| 2026-February-1 }} used with cylindrical penetration {{strike| is permissible || 2025-February-1 }}, provided
<ol>
<li>the flexible boot flashing
<ol>
<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
<li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
<li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,
<li>is fastened with gasketed screws spaced no more than 38.1 mm (1-1/2") O.C.,
<li>is secured around the penetration with a stainless-steel clamping ring{{hilite |, but when a clamping ring cannot be installed, the top of the flashing must be protected with a caulked, galvanized storm collar|| 2021-October-30 }}, and
<li>is sealed around the penetration joint with a bead of sealant
</li></ol>
<li>{{hilite | the penetration is fitted with a properly sized and caulked galvanized storm collar|| 2021-June-30 }}, and
<li>{{hilite | the plumbing trade (for new construction only) ensures|| 2021-June-30 }}
<ol>
<li>{{hilite | the flashing is not distorted|| 2021-June-30 }}, and
<li>{{hilite | a storm collar is securely fitted and caulked with sealant|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>{{hilite | Plastic flashings, vents, and related fittings shall not be used on an architectural sheet metal roof|| 2026-February-1 }}.
<li>A cylindrical penetration flashing (i.e., for a pipe)
<ol>
<li>with a maximum opening diameter equal to or less than 152.4 mm (6”) may be installed on a curb, but shall in any case be flashed with a flexible boot flashing, or with a rigid metal pipe flashing.
<li>with a maximum opening diameter greater than 152.4 mm (6”), and all exhaust flues (B-vents), may not be flashed at the ''drainage plane'' and instead must be installed on a curb (see [http://rpm.rcabc.org/index.php?title=ASM_11.2.1_Curb,_Split_Panel ASM 11.2.1 Curb, Split Panel]).
</li></ol>
<li>{{hilite | When a cylindrical penetration extends above the top edge of its flashing so that it cannot be sealed with a settlement cap, the penetration must be fitted with at least one properly fitted, level, galvanized clamping storm collar placed immediately above the top opening of the flashing.|| 2021-June-30 }}
<li>{{hilite | All installed storm collars must be sealed with a continuous, untooled bead of acceptable sealant at least 9.53 mm (3/8”) wide, applied to and centered over the joint between the collar and the penetration|| 2020-July-3 }}.
<li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head), or
<li>a curb waterproofed with sheet membrane and flashed with sheet metal, and fitted with a customized sheet metal hood (shaped to function like a weather head).
</li></ol>
<li>Cables passing through a penetration flashing should be drooped, and horizontal pipes should be fitted with a capillary-breaking collar, to prevent water from tracking along the cable or pipe, into the building; {{hilite | water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | Where a purpose-made flashing does not fit the penetration (i.e., a penetration that is a square post), or when a penetration extends above the top edge of the flashing so that it cannot be enclosed with a cap or protected with a storm collar {{hilite | {{strike| (Ref. Figure 12.3.2.-A)|| 2025-February-1 }}{{hilite | (See '''Figure 12.3.2.1.-A''')|| 2026-February-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}|| 2020-July-3 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of {{hilite |semi-cured EPDM (or its equivalent)|| 2020-July-3 }},
<ol>
<li>{{hilite | loosely wrapped around the penetration and the flashing at least 1-1/2 times, or adhered to itself and overlapped at least 50.8 mm (2") ||2021-February-7 }},
<li>{{hilite | installed free of wrinkles or fish-mouths ||2021-February-7 }},
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>{{hilite | clamped at the top and at the bottom using stainless steel clamps set back from the membrane edge no more than 6.35 mm (1/4") ||2021-February-7 }}, or
</ol></li>
<li>with {{hilite | heat- ||2021-February-7 }}shrink tubing that
<ol>
<li>{{hilite | {{hilite | extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2") ||2021-February-7 }},
<li>is secured with stainless steel mechanical clamps installed at each end of the tubing, and
<li>{{hilite | is caulked with an acceptable sealant (when adhesive-lined heat-shrink tubing is used, the sealant may be omitted). || 2023-October-28 }}
</ol></li>
</ol></li>
<li>{{hilite | Unshielded flexible mechanical ("MJ") couplings || 2024-January-31 }}
<ol>
<li>{{hilite | shall be clamped to the penetration and its flashing, and sealed along the top edge with an acceptable sealant, and || 2024-January-31 }}
<li>{{hilite | are suitable for use only with penetrations that will not expand, contract, or move with anticipated building settlement, i.e., fall protection anchors. || 2024-January-31 }}
</ol></li>
<li>{{hilite | Chimney chase caps that are included in the scope of roofing work|| 2021-October-30 }}
<ol>
<li>{{hilite | shall be fabricated to meet the requirements set out in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]|| 2021-October-30 }},
<li>{{hilite | must be fully supported beneath the flashing|| 2021-October-30 }},
<li>{{hilite | must be waterproofed beneath the cap flashing with a RoofStar-accepted self-adhered eave protection membrane installed according to the membrane manufacturer’s written instructions (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]])|| 2021-October-30 }}, and
<li>{{hilite | shall be sealed at the penetration collars with the waterproofing membrane|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Cylindrical penetrations through chimney chase caps that form part of the roofing work must be fitted with a properly sized galvanized storm collar, caulked with sealant|| 2021-October-30 }}.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.1.-A Alternate Flashing of Pipe Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.1.(14) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.1.3.1-A (B).png | link=https://rpm.rcabc.org/images/4/49/Figure_12.1.3.1-A_%28B%29.png | 400 px]]
|}

====12.3.2.2. Reserved====
====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16}}
<li>{{hilite | Penetrations that are closer together than the allowable minimum distance must be supported by a written Variance issued by the '''''Guarantor'''''. || 2023-June-16 }}
</li></ol>

====12.3.2.4. Curbs and Sleepers====

<ol>
<li>All ''curb'' flashing shall be constructed on a split pan and affixed to the pan with blind rivets.
<li>Split pans must be
<ol>
<li>secured to the roof structure, and to adjacent panels, with cleats that are fashioned from compatible metal and fastened to the structure with screws.
<li>hooked to the cleats, and to adjacent roof panels, shingle fashion with positive laps, and
<li>sealed at each lap with two parallel untooled beads of sealant.
</li></ol>
<li>{{hilite | All curbs or penetrations that can be flashed with sheet membrane shall, regardless of their geometry, be flashed with a high-temperature rated membrane which must positively lap field underlayment, and must be carried|| 2026-February-1 }}
<ol>
<li>{{hilite | at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies)|| 2026-February-1 }},
<li>{{hilite | no higher than the top of a flexible boot penetration|| 2026-February-1 }},
<li>{{hilite | to the top inside edge of curbs, and|| 2026-February-1 }}
<li>{{hilite | onto field by at least 152.4 mm (6”)|| 2026-February-1 }}.
</li></ol>
{{strike| <li>All ''curbs'' must be fully flashed with the same membrane used for eave protection and valleys, and must extend to the top of the ''curb''. || 2025-February-1 }}
<li>Where possible, membrane flashing should extend across the top of the ''curb'' and terminate on the vertical inside face.
<li>{{hilite | Skylights installed on ''curbs'' meeting the minimum height requirements (see [[#12.1.3.4. Curbs and Sleepers | Article 12.1.3.4.]]) must be waterproofed with membrane and flashed with sheet metal in keeping with the requirements for ''curbs''|| 2021-June-30 }}.
<li>{{hilite | Skylights with proprietary ''curbs'', regardless of their height, must be sealed to the ''roof deck'' following the requirements for penetration and vent flashings|| 2021-June-30 }}.
<li>Back pan membrane flashing must extend
<ol>
<li>at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies),
<li>to the top inside edge of ''curbs'',
<li>914.4 mm (36") up the slope from the ''curb'' transition, and
<li>onto the field, past the ''curb'' at least 152.4 mm (6”).
</li></ol>
<li>Back-pan metal flashings for curbs up to 914.4 mm (36”) in width must extend
<ol>
<li>past the edges of a ''curb'' by 101.6 mm (4”) but project no closer to the adjacent seam than 51 mm (2”), and
<li>up the slope beneath the metal panels, to a point at least 150 mm (6”) (when measured vertically) from the base of the ''curb''.
</li></ol>
<li>''Curbs'' with widths 914.4 mm (36”) to 2438.4 mm (96") must be constructed with a metal ''cricket''
<ol>
<li>that is supported by rigid material to prevent metal distortion,
<li>that is integrated with the ''curb'' flashing panels,
<li>that extends up-slope from the back of the ''curb'', beneath the metal panels to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>fabricated with flanges that lap under the metal ''curb'' flashing at least 50.8 mm (2”), and
<li>that is closed at all seams, using
<ol>
<li>welds, or
<li>blind rivets, incorporating two beads/rows of sealant.
</li></ol>
</li></ol>
<li>Waterproofed gutter membranes for ''curbs'' wider than 2438.4 mm (96") must slope toward the eaves at least 2%, and shall
<ol>
<li>extend up the slope at the back of the ''curb'', beneath the metal panels, to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>extend horizontally from the ''curb'' at least 254 mm (10”), to the nearest metal panel upstand,
<li>lap continuously on either side of the ''curb'', and onto the down-slope metal panels, and
<li>extend a minimum of 152.4 mm (6") over the lower metal roof panels, measured from the back pan.
</li></ol>
<li>Fasteners for metal panels installed above the back of the ''curb'' must be placed 101.6 mm (4") or more above the curb base, when measured vertically.
</li></ol>

====12.3.2.5. Air Vents====

<ol>
<li>Air vents
<ol>
<li>{{hilite | shall be installed on a curb, using the split pan method (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements) || 2027-February-1 }},
<li>{{hilite | shall be installed within 609.6 mm (24”) of a ridge, and evenly spaced along the ridgeline, and || 2027-February-1 }}
<li>{{hilite | must be installed on only one side of a ridge or hip line (vents installed on opposite or adjacent sides of a roof plane will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
</li></ol>

{{strike| <ol>
<li>{{hilite |Air vents shall be installed in keeping with the requirements in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]]|| 2021-June-30 }}
</li></ol> || 2026-January-27 }}

====12.3.2.6. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]], and
<ol>
<li>may be used
<ol>
<li>{{hilite | on the ''drainage plane''|| 2021-February-7 }},
<li>where sheet membrane flashing may not be practical or even possible,
<li>{{hilite | to terminate the top edge|| 2021-February-7 }} of sheet membrane flashing,
<li>{{hilite | for sheet membrane reinforcement (i.e., at corners)|| 2021-February-7 }},
<li>{{hilite | where abrasion resistance is desirable|| 2021-February-7 }},
<li>{{hilite | where resistance to contamination of sheet membrane is necessary|| 2021-February-7 }}, or
<li>{{hilite | where the ''Design Authority'' specifies its application. || 2023-June-16 }}
</ol></li>
<li>must be compatible with the primary sheet membrane flashing,
<li>shall be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, all as required by the ''manufacturer'' in their published instructions,
<li>must be applied within masked boundaries to produce clean, straight, plumb edges, and
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece {{hilite | is cut to|| 2021-February-7 }} cover the masked area, to within 3.78 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") (See {{hilite | '''Figure 12.3.2.6.-A''' || 2026-February-1 }}).
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane.
<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing ''system''|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>{{hilite | may be used|| 2021-February-7 }}
<ol>
<li>{{hilite | to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]]|| 2021-February-7 }},
<li>{{hilite | to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes|| 2021-February-7 }}, or
<li>{{hilite | to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]])|| 2021-February-7 }}.
</ol></li>
<li>{{hilite | must not be used in the ''drainage plane'', or to reinforce membranes against abrasion|| 2021-February-7 }},
<li>{{hilite | must be applied in two cured coats, unless otherwise permitted in this Standard|| 2021-February-7 }}, and
<li>{{hilite | must be fleece-reinforced between coats where|| 2021-February-7 }}
<ol>
<li>{{hilite | the application is considered permanent, || 2023-June-16 }}
<li>{{hilite | a change in plane (angle) occurs|| 2021-February-7 }}, or
<li>{{hilite | there is a joint between two supports and the liquid membrane must serve as a bridge|| 2021-February-7 }}.
</ol></li>
</ol></li>
<li>{{hilite | Accessory PMMA detailing products|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>{{hilite | must be|| 2021-October-30 }} reinforced with chopped or loose fibres,
<li>{{hilite | shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted|| 2021-February-7 }},
<li>{{hilite | must be used at locations 101.6 mm (4”) or more above the ''drainage plane''|| 2021-February-7 }}, {{hilite | except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system|| 2021-October-30 }}, and
<li>{{hilite | must not be used where movement is expected|| 2021-February-7 }}.
</ol></li>
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Acceptable Application of 2-Component PMMA Around Roof Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.6.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg | link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of walls must be located at least 88.9 mm (3-1/2") above the ''drainage plane''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''roof assembly'' (i.e., on top of a parapet) shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
</li></ol>

====12.3.2.8. Reserved====

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>{{hilite | ''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counter-flashing (also see the Glossary for a colloquial use of the term). || 2023-June-16 }}
<li>{{hilite | ''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge"). || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the ''Architectural Sheet Metal Manual'' published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>{{hilite | Design drawings must detail metal flashing profiles desired for the ''project''|| 2021-June-30 }}.
<li>{{hilite | Roof materials that are UV-sensitive must be protected with metal flashings|| 2021-June-30 }}.
<li>{{hilite | Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the design specifications for ''linear metal flashing'' shall conform to the design requirements in the applicable ''waterproofing roof system'' Standard|| 2021-June-30 }}.
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 24-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
<li>{{hilite | Except for metal valley flashings (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]), ''linear metal flashings'' may be overlapped rather than seamed; each overlap must be no less than|| 2021-June-30 }}
<ol>
<li>{{hilite | 101.6 mm (4”) when fully caulked in the lap|| 2021-June-30 }}, or
<li>{{hilite | 152.4 mm (6”) when installed without caulking in the lap|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Sealants used in exposed locations must be tooled to positively shed water|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-A Minimum Required Gauge and Length for Pre-finished Galvanized Steel Cap (Coping) Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Horizontal Span !! style="width:50px;" | Minimum Slope !! style="width:50px;" | Gauge !! style="width:150px;" | Maximum Flashing Segment Length !! style="width:200px;" | Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 300 - 900 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 900 mm or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|}
::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-B Minimum Required Gauge and Length for Pre-finished Galvanized Steel Vertical Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Vertical Face !! style="width:50px;" | Gauge !! style="width:175px;" | Segment Length !! style="width:250px;" | Vertical Seam Options
|-
| Up to 152.4 mm (6") || 24 || 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || 3048 mm (120") || Butt Seams*
|}

::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]]).
<li>{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}{{hilite | (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
</li></ol>

====13.1.3.6. Cap and Counter-flashing====

<ol>
<li>{{hilite | Cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the design requirements in the applicable ''waterproofing roof system'' or gutter membrane Standard || 2023-June-16 }}.
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Refer to [[#10.3.7.2. Intersections with Waterproofing Roof | Article 10.3.7.2.]]
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>{{hilite | ''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.|| 2022-February-5 }}
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>{{hilite | When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below|| 2026-July-1 }}.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ''ASTM A653'' / ''A653M-06'' CS Type B, Z275 (G90) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel {{hilite | Grade 304|| 2026-July-1 }}''': {{hilite | minimum 0.38 mm (0.014", 28-gauge)|| 2026-July-1 }} stainless steel, Grade {{strike| Type 302, || 2025-June-3 }} 304, {{strike| 316, 2B finish to ASTM A167-82 || 2025-June-3 }} {{hilite | conforming to ASTM {{strike| A167-82 || 2025-June-3 }} A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet {{hilite | (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2) | {{hilite | Note A-13.2.1.2.(3)(2)]]) || 2026-July-1 }}.
<li>{{hilite | '''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge)) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. || 2026-July-1 }}
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ''ASTM A792''/''A792M-06'' CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Stainless Steel''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Type 302, 304, 316, 2B finish to ''ASTM A167-82''. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ''ASTM B370-81''. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard ''EN 988-1996''. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards.
<li>{{hilite | Where a ''waterproofing system'' adjoins and Architectural Sheet Metal System, ''linear metal flashings'' must be fabricated from 24-gauge steel stock|| 2021-June-30 }}.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>{{hilite | threaded screws, {{hilite | friction-type pins (i.e., for masonry or concrete), plug (inserts), || 2024-January-31 }}or rivets (where permitted), || 2023-October-28 }}
<li>{{hilite | compatible with materials they contact, || 2023-October-28 }}
<li>{{hilite | corrosion-resistant, || 2023-October-28}}
<li>{{hilite | identified in the engineered design, when part of the roof system’s wind resistance calculations (Ref. Article 3.1.3.3., “Resistance to Specified Wind Loads”), || 2023-October-28 }}
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>{{hilite | Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings || 2023-October-28 }}
<ol>
<li>{{hilite | in concealed locations must be at least No. 8 (larger if required by the engineered design), with a low-profile head. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10. (larger if required by the engineered design), shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.|| 2023-October-28 }}
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to any one of the following:
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”.
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”.
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”.
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted otherwise, all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
<li>Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the fabrication of ''linear metal flashing'' shall conform to the requirements in the applicable ''waterproofing roof system'' Standard.
<li>Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break.
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed,
<li>shall conform to the minimum requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }},
<li>shall incorporate seams conforming to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }}, and
<li>may not exceed the maximum length of 3048 mm (120").
</ol></li>
<li>{{hilite |The vertical leg of any metal flashing that overlaps roofing material must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break|| 2021-June-30 }}.
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems''),
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.1.3. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous {{hilite | or butyl-based || 2026-February-1 }} membrane used as eave protection in a ''water-shedding roof system'') (Ref. [[#Section 8.2. Materials | Section 8.2.]]).
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}
<ol>
<li>{{hilite | shall conform to the fasteners requirements in || 2024-January-31 }} [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>{{hilite | shall be firmly fastened, without distorting secured materials, || 2024-January-31 }}
<li>{{hilite | must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate || 2024-January-31 }} {{strike| must penetrate the substrate as specified in [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]], and || 2023-January-26 }}
<ol>
<li>{{hilite | through the back surface of steel framing at least 19.05 mm (3/4"), || 2024-January-31 }}
<li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
<li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
{{strike| <li>Where hidden metal clips are required, they must
<ol>
<li>be at least 24-gauge,
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 76.2 mm (3") from the bottom edge (hook), and
<li>engage drip or safety edges by a minimum of 12.7 mm (1/2").
</li></ol>
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centred between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol> || 2023-January-26 }}
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the roof side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing|| 2022-February-5 }}.
<li>{{hilite | All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article|| 2022-February-5 }}.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ({{hilite | '''Figure 13.3.2.2.-A''' || 2026-February-1 }}) or S-lock ({{hilite | '''Figure 13.3.2.S.-B''' || 2026-February-1 }} (Single) and {{hilite | '''Figure 13.3.2.S.-C''' || 2026-February-1 }} (Double)), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }},
<li>{{hilite | continuous eave flashing to which the metal panels are secured || 2023-June-16 }}, or
<li>{{hilite | the vertical face of any flashing that is concealed by a ''wall assembly'', counter-flashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap|| 2021-October-30 }}
<ol>
<li>{{hilite | is no less than 101.6 mm (4”) when fully caulked in the lap|| 2021-October-30 }}, or
<li>{{hilite | is no less than 152.4 mm (6”) when installed without caulking in the lap.|| 2021-October-30 }}
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (closed with a "rat tail").
<li>When the face of vertically-oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically-oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See {{hilite | '''Figure 13.2.2.2.-A''' || 2026-February-1 }}) must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>
<li>'''S-locked seams''' ({{hilite | '''Figures 13.2.2.2.-B''' || 2026-February-1 }} and {{hilite | '''13.2.2.2.-C''' || 2026-February-1 }}) must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
<li>'''Flat butt seams'''
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
<li>The saddle for flat butt seams must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-A''' '''Mechanical Locking Standing Seam''' Forming Part of Sentence 13.2.2.2.(11) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-B''' '''Single S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-C''' '''Double S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]] || [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 300 px]] || [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]]
|}

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | The installation of cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the application requirements in the applicable ''waterproofing roof system'' Standard || 2023-June-16 }}.
</li></ol>

<hr>
<div id=PART_14></div>

={{hilite | Part 14 - The Roof as a Platform || 2023-June-16}}=
==Section 14.1. Design==
===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. {{strike| Definitions || 2024-December-23 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. RoofStar 15-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any covering, amenity space, structure or live loads superimposed upon the ''roof system''.
</li></ol>

====14.1.3.3. Securement of Supported Structures and Equipment====

<ol>
<li>The ''Design Authority'' is responsible to specify the appropriate securement design of roof coverings, structures, and equipment, to resist ''Specified Wind Loads''.
<li>Where structural securement is desirable or required, the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12,"Penetrations and Curbs"]], and [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]).
</li></ol>

====14.1.3.4. Snow Guards====

<ol>
<li>While snow guards are not part of the ''roof system'', snow guards
<ol>
<li>must not penetrate the metal ''roof system'', and
<li>shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>The decision to use snow guards, and their selection, is the responsibility of the ''Design Authority'' and neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the roof ''system'' caused by the use or absence of snow guards.
</li></ol>

====14.1.3.5. Photovoltaic Panels====

<ol>
<li>Photovoltaic panels are considered "equipment" within the definitions used in this Standard, are not part of the ''roof system'', and therefore photovoltaic panels
<ol>
<li>must not penetrate the metal ''roof system'', and
shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>All electrical connections, distribution cables, and related systems that penetrate the ''roof system'' must be flashed with purpose-made flashings incorporating weather-head fittings (see [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]; see also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., ''Electrical Cables and Boxes'']]).
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to ASM Standard | Notes to Standard]]=

</div>
</div>
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[[RCABC Roofing Practices Manual | Home]]
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Material Classification and Application for Acceptance

2026-06-22T21:14:08Z

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<big><big>Division C - Accepted Materials</big></big>
<hr>
<big><big><big><big><big><big>Material Classification and Application for Acceptance</big></big></big></big></big></big>

=Part 1 - General=
==Section 1.1. Purpose==
===1.1.1. Accepted Materials and Systems in RoofStar Guarantee Program===
====1.1.1.1. General====
The '''''RoofStar Guarantee Program''''' is comprised of five integral components, explained in [https://rpm.rcabc.org/index.php?title=Guarantee '''The RoofStar™ Guarantee Program''']:
*'''Membership'''
*'''Training'''
*'''Accepted Materials'''
*'''Guarantee Standards'''
*'''Independent Observations'''
 
''Accepted Materials'' (also referred to in this Manual as "Materials", "Accepted Products" or simply as "Products") and accepted systems (such as ''vegetated roof systems'') are critical to the integrity of the '''''The RoofStar™ Guarantee Program'''''. Not every material in the marketplace may be specified and installed in a ''project'' for which a '''''RoofStar Guarantee''''' is required – only those that are accepted by the '''''RGC''''' qualify for a '''''RoofStar Guarantee'''''.

The '''''RGC''''' accepts materials and systems. The '''''RGC''''' does not approve them, endorse them, recommend them, or promote them. They are "accepted" because they are made by RCABC Member manufacturers who support their materials and systems with a bond. Furthermore, those materials and systems conform to objective, published, accepted criteria, including acceptance criteria specifications published by the '''''RGC'''''. Consequently, acceptance of materials or systems should not be construed as an indication of the quality or performance of other materials not listed in this ''Manual''. Tables and lists in the RPM are not intended for use as a comparison of material performance or quality. It is the sole responsibility of the ''Design Authority'' to assess the performance capability and material suitability for specific design requirements.

Applications for material acceptance are received and reviewed three times per calendar year – January, May and September. Applications must be received three weeks in advance of the scheduled Technical Committee meeting, or they will be deferred to the next meeting in the rotation. See the [http://www.rcabc.org/events/ '''Events Calendar'''] for the next scheduled Technical Committee meetings.

====1.1.1.2. Qualified Applicants====
Only Members of the '''Roofing Contractors Association of British Columbia''' may apply for Material Acceptance in the '''''RoofStar™ Guarantee Program'''''. To become a member of the RCABC, visit our [http://www.rcabc.org/members/become-a-member/ '''website'''].
<hr>

=Part 2 - Roofing Materials=
==Section 2.1. Roofing Material Classification==

==={{hilite |2.1.1. Material Acceptance Criteria || 2022-June-17 }}===
The RCABC classifies accepted roofing materials (ref. Policy A-041) using three criteria, each with specific Material Application requirements: Primary materials, Secondary materials, and Accessories. Vegetated roofing is classified by system type (extensive, semi-intensive, and intensive), although each constituent material is accepted by the RGC.

====2.1.1.1. Primary Roofing Materials====
<ol>
<li>A ''primary material'' is a waterproofing or water-shedding material which that is usually exposed to the weather and is primarily responsible for protecting ''secondary materials'' and the building interior from water and weather.
<li>Membranes, metal panels, or shingles are typical materials classified as primary but the category “primary material” also includes (without limitation)
<ol>
<li>liquid membrane flashing systems,
<li>vents,
<li>r''oof drains'',
<li>plaza deck drains, and
<li>flashings that enclose penetrations and are integrated with a membrane, metal panel, or shingles.
</li></ol>
<li>An application for acceptance of a ''primary material'' must be supported by
<ol>
<li>a ''manufacturer’s'' material bond (ref. RGC Policy A-078, “Material Acceptance Agreement”, and
<li>RGC Policy A-055, “Associate Member Commitment” (also see RGC Policy A-006, “Active Member Criteria”).
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>Current Technical Data Sheet (TDS); each TDS must be dated and show the current ASTM and or CSA related required tests, including numerical values;
<li>Current application specifications;
<li>Proof of material testing, where required:
<ol>
<li>For all waterproofing roof membranes, this must include current testing using the test method, CSA-A123.21.
<li>All ''Tested Assembly'' reports must be included as a PDF with the application.
</li></ol>
<li>Verifiable marketplace installation in British Columbia, over a period of no less than a two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required);
<li>Independent inspection reports by an accepted Observation Firm and ''Observer'', confirming the performance of the material named on the "RGC Application for Material Acceptance"; and
<li>Approvals (any and all jurisdictions).
</li></ol>
<li>All ''primary materials'' must be supported by the ''manufacturer'' with a local technical representative.
</li></ol>

====2.1.1.2. Secondary Roofing Materials====

<ol>
<li>A ''secondary material'' is one which forms part of a the waterproofing or water-shedding assembly and which may affect the wind resistance characteristics of the entire assembly, but is not necessarily exposed to the weather.
<li>The term secondary material includes (without limitation)
<ol>
<li>deck overlays,
<li>roof underlayment,
<li>eave protection,
<li>insulation,
<li>insulation board overlays,
<li>joint tapes,
<li>fasteners and stress plates,
<li>adhesives, and
<li>primers.
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>A current Technical Data Sheet (TDS),
<li>Current installation/application specifications,
<li>Material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>Verifiable marketplace installation in British Columbia, over a period of no less than two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required).
</li></ol>
</li></ol>

====2.1.1.3. Roofing Accessories====

<ol>
<li>A ''roof system accessory'' is a material that joins ''primary'' or ''secondary materials'' together or is connected to/with a ''primary material'' or ''secondary material'' but does not by its nature (apart from its installation) directly affect the water or wind resistance of the ''waterproofing'' or ''water-shedding assembly''.
<li>The term accessory may include (without limitation)
<ol>
<li>caulking,
<li>sealants, and
<li>mastics.
</li></ol>
<li>''Roof system accessories'' currently are not ‘accepted’ in the '''''RoofStar Guarantee Program'''''. However, ''manufacturers'' or suppliers wishing to have their accessories listed in [[Division C]] of the "RCABC Roofing Practices Manual" must, as a condition for listing, provide the RGC with
<ol>
<li>a current Technical Data Sheet (TDS),
<li>material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>current installation/application specifications.
</li></ol>
</li></ol>

==Section 2.2. Roofing Material Acceptance Criteria==
===2.2.1. General===
====2.2.1.1. Purpose====

Acceptance Criteria created by the '''''RGC''''' ('''''Guarantor''''') are intended solely to establish objective requirements for materials used in the '''''RoofStar™ Guarantee Program''''' (property of the RCABC Guarantee Corp. ('''''RGC''''')) through which the RGC issues the '''''RoofStar Guarantee''''' for ''waterproofing'' and ''water-shedding systems''.
Materials used in the construction of ''waterproofing'' or ''water-shedding systems'' must be accepted by the RGC (Refer to other resources on this page or in this Manual, as they related to acceptance criteria and the application and approval process). RGC Acceptance Criteria are made available only as part of the administrative acceptance process for the '''''RoofStar Guarantee Program''''', for products manufactured by Associate Members of the RCABC. Use of this Acceptance Criteria for any other purpose than that which is stated above shall be at the sole discretion of the user and is not endorsed or condoned by the RGC. Furthermore, this Acceptance Criteria, and the term “accepted”, shall not be construed as a measure of a material’s efficacy or its suitability for any application outside the '''''RoofStar Guarantee Program''''', nor shall it be construed to mean that the '''''Guarantor''''' endorses a product conforming to the requirements set out in this document.

RGC Acceptance Criteria provide guidelines for the material and performance characteristics to which an accepted material must conform. Acceptance is confirmed by the Guarantor through a review of the applicant’s submission and is finally endorsed by the RGC Board of Directors. Accepted materials are periodically reviewed by the '''''RGC''''' for conformity to these criteria, and acceptance may be revoked at any time should the product change so that it no longer conforms.

RGC Acceptance Criteria documents are evaluated periodically by the RGC Technical Committee, which meets throughout the year. The RGC reserves the right under policy to change Acceptance Criteria at any time, and any changes to this Acceptance Criteria shall be effective on the date shown on each Criteria document. Changes will be highlighted for a period of twelve (12) months. Previous versions of this Acceptance Criteria can be requested in writing from the '''''Guarantor'''''.

In the event that a product listed in the '''''RoofStar Guarantee Program''''' is rendered non-conforming by a change in an Acceptance Criteria, the ''manufacturer'' will have up to twelve (12) months from the date of the change to conform to the Acceptance Criteria and resubmit the material for acceptance by the RGC. Non-conforming materials will be removed from the RoofStar Guarantee Program.

The following RGC Acceptance Criteria specifications are available for download and are referenced in one or more Standards published in this ''Manual''. Submitters presenting applications to the RGC for material acceptance must use the RGC Application forms (F-090 or F-090 VRS) for Material Acceptance, available in Part 5 below.

===2.2.2. Acceptance Criteria Specifications===
====2.2.2.1. Acceptance Criteria for Roof Waterproofing System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/9/9e/Acceptance_Criteria_RGC_ACWP-MOD.pdf '''RGC ACWP-MOD'''], "RGC ACCEPTANCE CRITERIA for MANUFACTURED POLYMER-MODIFIED, REINFORCED BITUMINOUS SHEET MEMBRANES Used in Roof Waterproofing and Grade-level Waterproofing Systems"
<li>For acceptance criteria applicable to other roof membranes, refer to Article 9.2.1.1. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for EPDM Membrane Roofs, [https://rpm.rcabc.org/index.php?title=EPDM_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for TPO Membrane Roofs, [https://rpm.rcabc.org/index.php?title=TPO_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for PVC Membrane Roofs, [https://rpm.rcabc.org/index.php?title=PVC_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_SelectionArticle 9.2.1.1.]
:*RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs, [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
</li></ol>

====2.2.2.2. Acceptance Criteria for Roof Water-Shedding System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/7/73/Acceptance_Criteria_RGC_ACWS-ASH.pdf '''RGC ACWS-ASH'''], "RGC ACCEPTANCE CRITERIA for INORGANIC FIBREGLASS-REINFORCED ASPHALT SHINGLES Used in Water-shedding Systems" See also [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#9.2.1.2._Shingles_Acceptable_for_RoofStar_Guarantee Article 9.2.1.2.] in the RGC Standard for Asphalt Shingle Roofs.
<li>For acceptance criteria applicable to metal roof panels, refer to [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.1._Panel_Grade.2C_Gauge.2C_and_Fabrication Article 9.2.1.1.] and (with respect to site-formed panels by RCABC Active (Contractor) Members, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.2._Roll_Forming_Machines_and_Mill_Certificate Article 9.2.1.2.], in the RGC Standard for Architectural Sheet Metal (ASM) Roofs.
</li></ol>

'''Secondary Materials'''
<ol>
<li>[http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf '''RGC ACWS-PUL'''], "RGC ACCEPTANCE CRITERIA for MECHANICALLY ATTACHED POLYMERIC ROOF UNDERLAYMENTS Used in Water-shedding Systems".
<li>For acceptance criteria applicable to self-adhered membranes used as eave and valley protection, refer to Article 8.2.1.2. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for Architectural Sheet Metal (ASM) Roofs, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
:*RGC Standard for Asphalt Shingle Roofs, [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
</li></ol>

====2.2.2.3. Acceptance Criteria for Roof Grade-level Waterproofing System materials====
:Under development

<hr>

=Part 3 - Vegetated Roof Systems=
==Section 3.1. Classification and Basis of Acceptance==
===3.1.1. Categories===
''Vegetated Roof Systems'' are classified in three broad categories: ''Extensive Systems'', ''Semi-intensive Systems'', and ''Intensive Systems''. There are no ‘hard and fast’ ways to define these, but there are principles and parameters that help the reader to understand what each category means. What is explained below is borrowed from both the “RGC Standard for Vegetated Roofs” (the Standard) and the Notes for the Standard.

====3.1.1.1. Extensive Vegetated Roof Systems====

<ol>
<li>The term ''Extensive Vegetated Roof'', "extensive green roof", and variations thereof, refers to a relatively light-weight ''green roof'' that is often inaccessible, is typically shallow (''growing media'' no deeper than 203.2 mm (8”), is comprised of limited plant diversity (often, plant species of the same genus), and requires minimal maintenance (adapted from the Standard, [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.1.4._Defined_Terms Article 1.1.1.4. Defined Terms]).
<li>When ''extensive vegetated roof systems'' are comprised of either pre-grown trays or mats, both the ''vegetated roof system manufacturer'' and the RGC jointly agree to cover the vegetation (as described on the Guarantee Certificate and in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1. of Division A]). The system manufacturer’s warranty is the primary responder to any claim for inadequate surface coverage, and for any failure of the system components.
</li></ol>

====3.1.1.2. Semi-Intensive Vegetated Roof Systems====

<ol>
<li>The term ''semi-intensive green roof'' (also referred to as "semi-intensive vegetated system", "semi-intensive assembly", or "semi-intensive") means a mid-weight, moderate height ''green roof'' that may be accessible to people, is generally of moderate depth (growing media depth ranging from 152.4 mm (6”) to 355.6 mm (14”), is typified by increased plant diversity, and requires moderate maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.3. Intensive Vegetated Roof Systems====

<ol>
<li>The term ''intensive green roof'' (Also referred to as "intensive vegetated roof system", "intensive assembly", or "intensive") means a heavier ''green roof'' that is usually accessible to people, is generally deep (growing media greater than 355.6 mm (14”)), supports a very diverse plant profile that may include trees, and requires considerable maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.4. Hybrid Vegetated Roof Systems====

<ol>
<li>Hybrid ''green roof'' systems combine a ''green roof system'' (usually ''extensive'') with water retention or detention, either captured in purpose-made materials or free-standing in a reservoir beneath the ''green roof''.
<li>Hybrid systems are permitted only on ''protected membrane roof assemblies'' and while some manufacturers offer them on ''conventionally insulated'' roofs, they must be redesigned to conform to the RGC Standard or submitted to the '''''Guarantor''''' for consideration under a written Variance.
<li>Roof membrane selection is a key point of consideration for these systems, since hydrostatic pressures may be higher than those expected on any other iteration of a ''protected roof''.
</li></ol>

====3.1.1.5. Other Systems====

<ol>
<li>The category "Other Systems" simply refers to ''green roofs'' that may be designed for purposes other than (or in addition to) their usual functions, such as stormwater management (For example, some vegetated systems are designed by the manufacturer as ballast for a photovoltaic assembly).
<li>While the '''''RGC''''' does not accept photovoltaics as a system or materials covered by a '''''RoofStar Guarantee''''', the ''vegetated roof system'' itself can be accepted and is listed in the ''Manual'' under the category heading, "Other Systems."
</li></ol>

===3.1.2. Systems and Materials===
====3.1.2.1. Systems Proprietary to Manufacturer====
<ol>
<li>''Vegetated roof systems'' must be produced, distributed, and warrantied by a ''vegetated roof system manufacturer''.
<li>A ''vegetated roof system manufacturer'' is defined in the Standard as “an Associate or Affiliate member of the RCABC who manufactures the ''vegetated roof system''”, but when the ''vegetated roof system manufacturer'' is an Affiliate member of the RCABC, the Affiliate Member must obtain and provide to the roofing ''Contractor'' (RCABC Active Member) “a formalized single source warranty agreement with a roof system ''manufacturer'' who is an Associate member of the RCABC).
<li>A ''single source warranty agreement'' “means an agreement between an RCABC Associate member and an RCABC Affiliate member, in which the Associate member permits the Affiliate member’s ''vegetated roof system'' on the Associate member’s primary roof covering without compromising coverage under the '''''RoofStar Guarantee Program'''''.
<li>A ''single source warranty agreement'' may be a standing agreement with a ''manufacturer'', or it may be project-specific.
<li>For a ''single source warranty agreement'' to be valid, the agreement must be formalized and the signed, dated document shall form part of the '''''Guarantor’s''''' records.
</li></ol>

===3.1.3. Warranties===
====3.1.3.1. Vegetated Roof System Manufacturer Warranties====
<ol>
<li>The ''vegetated roof system manufacturer’s'' warranty forms the primary basis of coverage under the '''''RoofStar Guarantee Program''''' and is required for a ''project'' intended to qualify for a '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

<hr>

=Part 4 - Labeling and Branding=
==Section 4.1. General==
===4.1.1. Product Criteria===
Product labeling impacts both RCABC membership requirements and the way in which the material application is considered for acceptance. The '''''RoofStar Guarantee Program''''' uses the criteria explained below for the evaluation and acceptance of materials.

====4.1.1.1. Branded (or Proprietary) Materials====
<ol>
<li>Branded, or "proprietary", is the term used to indicate that a product has been made by, and labeled exclusively with the name of, the ''manufacturer''.
<li>These products are packaged with the explicit identification of the ''manufacturer'', they have been tested by the ''manufacturer'', and the technical data sheet will show that the ''manufacturer'' has undertaken this Due Diligence.
<li>When a material is said to be branded, the ''manufacturer'' carries the liability for the product and, as such, the material bond attaches to any of the ''manufacturer’s'' products accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>

====4.1.1.2. Private Labeled Materials====
<ol>
<li>The term “private labeled” means a product manufactured by one company for another ''manufacturer'', distributor, or installer (the distributor or seller), and where the product packaging (and on the product itself, if the product is amenable to labeling) shows only the name of the distributor or seller.
<li>When a material is said to be private labeled, the material specifications may be substantively different from those of its ‘cousin’ product; it is the distributor or seller whose name the private labelled material carries, not the original ''manufacturer'',
<ol>
<li>who is legally liable for the product, and
<li>who is responsible for testing.
</li></ol>
<li>The technical data sheet will carry only the distributor’s or seller’s name on it, as if they had manufactured it, which means the actual ''manufacturer’s'' material bond will not attach to the product, should it fail.
<li>For private labeled materials, a new material application is required, regardless of the ''manufacturer'' or the material’s similarities to an Accepted Material. Furthermore, all bond requirements apply to the distributor or seller regardless of who manufactured the product.
</li></ol>

====4.1.1.3. Co-Branded Materials====
<ol>
<li>The term “co-branded” means products labeled both with the ''manufacturer’s'' name and with the name of a distributor/installer who wishes to use it for advertising.
<li>When a material is said to be co-branded,
<ol>
<li>the material packaging identifies the ''manufacturer'' (though perhaps not always exclusively), and
<li>the ''manufacturer'' pays for the tests and is fully liable for any product failures, which means the material bond posted by the ''manufacturer'' attaches to a co-branded product.
</li></ol>
<li>For ''manufacturers'' whose product already has acceptance in the '''''RoofStar Guarantee Program''''', no new Accepted Material application is required for an identical co-branded product.
<li>Notwithstanding the foregoing, the '''''RGC''''' reserves the right to examine the technical data of a co-branded product to verify its acceptability.
</li></ol>

<hr>

=Part 5 - Acceptance and Changes=
==Section 5.1. General==
===5.1.1. Application Process===
====5.1.1.1. General Requirements====
Most applicants submit an application for acceptance of a new product – something that has not already been accepted by the '''''RGC'''''. However, accepted materials or systems sometimes undergo a name change, or they are discontinued and replaced. It may also happen that a Member has produced a new product substantially similar to one already accepted by the '''''RGC''''' and is promoted by the ''manufacturer'' as an improvement. The '''''RGC''''' provides simplified, transparent options for applying for material and system acceptance, and all of these options are covered in this Part. The following general conditions apply to material or system acceptance and changes.

<ol>
<li>Every applicant must ensure that they have already completed the basic administrative forms and signed the appropriate policies.
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>A product or system that is not replacing a material or system already accepted by the '''''RGC''''' is considered a new material or system and therefore must be submitted for acceptance by the '''''Guarantor''''' with a completed set of forms, either as a new Member (See Sub-section 4.1.3.) or as an existing RCABC Member (Sub-section 5.1.3.).
</li></ol>
</li></ol>

===5.1.2. All RCABC Member Manufacturers===
====5.1.2.1. General====
<ol>
<li>Applications for material acceptance will be handled on the basis of “first come, first served”, but the RGC Administration reserves the right to cap the number of applications and give priority to new material applications.
<li>Documents, including but not limited to Technical Data Sheets, Application (installation) Guides, and third-party field reviews, must not be locked or password protected; locked or password protected documents will be rejected and the application package will be labelled "Incomplete".
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>To use the forms linked below,
<ol>
<li>Download and save a blank copy to your computer or server,
<li>Reopen the file with [https://get.adobe.com/reader/ '''Adobe Acrobat'''] or another PDF reading/writing program to activate the fillable field function,
<li>Complete the form and save it, and
<li>Submit completed forms electronically to the [mailto:technical@rcabc.org '''''RoofStar Guarantee Program'''''] and indicate “New Material Acceptance application” in the Subject line.
</li></ol>
</li></ol>

====5.1.2.2. RCABC Policies====
<ol>
<li>Acceptance of materials and systems for installation in a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee''''', is governed by RCABC policies.
<li>Every Associate Member manufacturer making application for acceptance of a new waterproofing or water-shedding material or system agrees to abide by the following RCABC policies and must complete and submit RCABC Policy A-078, "Material Acceptance Agreement" (one time only, unless a signed updated version is required).
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>Every Associate or Affiliate Member manufacturer making application for acceptance of a new ''vegetated roof system'' agrees to abide by the following RCABC policies and must complete and submit Policy A-078 (one time only, unless a signed updated version is required):
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>In addition to the policies listed in Sentence (3), every Affiliate Member of the RCABC who manufactures an accepted ''vegetated roof system'' must abide by Policy A-316, "Affiliate Membership Criteria."
<li>Member copies of RCABC policies can be procured from [mailto:rkoppen@rcabc.org '''RCABC Member Services'''].
</li></ol>
</li></ol>

====5.1.2.3. Bonding====
<ol>
<li>All primary materials, and all ''vegetated roof systems'', must be covered by an annually-renewable bond procured by the RCABC Member manufacturer and presented to the '''''RGC''''' for safekeeping in the Member's records.
<li>Member bonding is covered by RCABC Policy A-080, "Material Bond"; see the bond amount requirements in RCABC Policy A-078 for Associate Members, and RCABC Policy A-316 for Affiliate Members (with respect to ''vegetated roof systems'').
<li>Bonds will be exercised only if and when an RCABC Member manufacturer defaults in their obligations under RCABC policy to respond to a claim against the manufacturer's material or system, when that material or system is part of a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

====5.1.2.4. Forms for Water-proofing and Water-shedding Systems and Materials====

<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms specifically relate to applications for acceptance of materials and systems used in waterproofing and water-shedding projects:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application):
<ol>
<li>For F-090 is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.5. Forms for Vegetated Roof Systems====
<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms pertain to applications for acceptance of ''vegetated roof systems'' and their component materials:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<ol>
<li>Form F-090 VRS is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 VRS must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.6. Applications by RCABC Manufacturers of Current Accepted Materials or Systems====
<ol>
<li>RCABC Members whose materials or systems are already accepted by the '''''RGC''''' and listed in [[Division C]] of the RPM do not need to resubmit signed policies or forms that constitute a first-time application (unless those policies have been renewed and a new commitment by the Member is required).
<li>All applications for the acceptance of water-proofing or water-shedding materials or systems must include the following forms:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application)
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
<li>All applications for the acceptance of ''vegetated roof systems'' must include the following forms:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

===5.1.3. Application Review and Acceptance===
====5.1.3.1. Product and System Samples====
<ol>
<li>At least one product sample must accompany an application for acceptance of a new material submitted for examination by the RGC Technical Committee.
<li>Samples must be submitted with an application for acceptance. Failure to supply a sample may result in the rejection of the application.
</li></ol>

====5.1.3.2. Administrative Review Process====
<ol>
<li>Applications for Material Acceptance are reviewed by the RCABC Technical Department of the '''''RoofStar Guarantee Program'''''; questions about the application process or acceptance criteria can be directed to the [mailto:guarantees@rcabc.org '''''RoofStar Guarantee Program'''''] via email, or by calling (604) 882-9734.
<li>The RCABC Technical Department occasionally processes acceptance of materials or systems under its administrative powers, for materials or systems that do not require formal review and consent by the RGC Technical Committee or the RGC Board of Directors, and administrative acceptance is granted at the discretion of the RCABC Technical Department and is subject to operational policy.
</li></ol>

====5.1.3.3. RGC Technical Committee====

<ol>
<li>Each completed application is reviewed by the RCABC Technical Department and subsequently presented to the RGC Technical Committee, which accepts or rejects the application.
<li>The RGC Technical Committee reports to the to the RGC Board of Directors and recommends acceptance or rejection of each material or assembly it reviews.
<li>The RGC Technical Committee meets three times per year to review applications for acceptance - January, May, and October. Cut-off dates for applications are published in the [https://www.rcabc.org/events/ '''''RCABC Calendar of Events'''''] on the RCABC website.
</li></ol>

====5.1.3.4. RGC Board of Directors====
<ol>
<li>Final acceptance of a material or system rests with the RGC Board of Directors, which meets several weeks after each of the RGC Technical Committee Meetings.
<li>Once a material or system has been accepted by the Board, the RCABC Technical Department lists the materials or systems in Division C of the RPM.
<li>If the applicant is a new RCABC Member, listing of accepted materials or systems will be on a new Member page in Division C.
<li>Any questions concerning the listing of materials or systems in Division C should be directed to the [mailto:technical@rcabc.org '''''RCABC Technical Department'''''].
</li></ol>

===5.1.4. Names Changes, Substitutions, and Discontinued Materials or Systems===
====5.1.4.1. General====

<ol>
<li>A change of product name, the introduction of a new product that is similar to one already accepted by the '''''RGC''''', or products that have been discontinued, all can materially affect the '''''RoofStar Guarantee Program''''', and are therefore managed by the '''''Guarantor''''' through the guidelines and procedures of this Subsection, with reference to and in support of RCABC Policy A-055, “Associate Member Commitment” and Policy A-316, “Affiliate Membership Criteria”.
</li></ol>

====5.1.4.2. Name Changes====

<ol>
<li>When a ''manufacturer'' notifies the '''''Guarantor''''' that an accepted material has been renamed, or when the '''''Guarantor''''' discovers that an accepted material has been renamed, the ''manufacturer'' must immediately support that claim with a new technical data sheet verifying that only the name has changed.
<li>A name change that is not supported by the ''manufacturer’s'' published technical literature will be deleted from result in the deletion of the product from the '''''RoofStar Guarantee Program''''' and [[Division C]] of the RPM.
</li></ol>

====5.1.4.3. Substitutions or Additions====

<ol>
<li>All applications for substitution or additions shall follow the typical process for a new material application.
<li>When an RCABC Member manufactures a material or system that replaces a material or system already accepted by the '''''RGC''''', and the replacement material or system is said to be equivalent to the old one, the RCABC Technical Department may grant the applicant permission to apply for acceptance through a shorter application process without requiring either documented marketplace experience or a formal review and acceptance by the RGC Technical Committee:
<ol>
<li>The shorter application process for the acceptance of materials is governed by RCABC Policy A-041 and is limited to materials offered by the ''manufacturer'' as
<ol>
<li>a substantially equivalent substitution for a material currently accepted for use in the '''''RoofStar Guarantee Program''''', but which has been discontinued from production by the manufacturer,
<li>an improved replacement for a material already accepted for use in the '''''RoofStar Guarantee Program''''', or
<li>an improved material substantially similar to, and intended as an addition to, a material already accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>
<li>To apply for a material substitution or addition, each RCABC Member manufacturer must (through its representative)
<ol>
<li>submit an F-090 Application form (requiring the RCABC Member manufacturer to provide a detailed explanation of the product changes or improvements) and make a declaration in the space provided, that the new material or system is substantially equivalent to the material or system it will replace or will improve upon and complement,
<li>submit the technical data sheets and other required documentation (independent test reports, if required by an RGC Acceptance Criteria specification), both for any discontinued product or system, and for newly submitted materials, and
<li>submit test data from a qualified lab/facility (where testing is required), demonstrating that the new material or system has met or exceeded specific test requirements (for example, that a sheet membrane has been tested under CSA-A123.21, or that a ''vegetated roof systems'' has been tested under CSA-A123.24).
</li></ol>
<li>Applications utilizing the shorter application process will be reviewed on an ongoing basis by the '''''Guarantor''''', and decisions presented to the RGC Technical Committee only for information purposes.
<li>Notwithstanding the foregoing, the '''''Guarantor''''' reserves the right to reject the applicant’s claims and to require an applicant to submit a full application complete with a marketplace product history.
</li></ol>
</li></ol>

====5.1.4.4. Material Discontinuance====
<ol>
<li>A ''manufacturer'' who has discontinued production or distribution of a material accepted by the '''''RGC''''' must, under the terms of RCABC Policy A-041, “Material Acceptance Criteria”, forthwith notify the '''''Guarantor''''' of that product’s discontinuance, at which time the '''''Guarantor''''' will remove it from its listing in [[Division C]] of the RPM.
</li></ol>

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Material Classification and Application for Acceptance

2026-06-22T21:13:00Z

James Klassen: /* 5.1.1.1. General Requirements */

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<big><big>Division C - Accepted Materials</big></big>
<hr>
<big><big><big><big><big><big>Material Classification and Application for Acceptance</big></big></big></big></big></big>

=Part 1 - General=
==Section 1.1. Purpose==
===1.1.1. Accepted Materials and Systems in RoofStar Guarantee Program===
====1.1.1.1. General====
The '''''RoofStar Guarantee Program''''' is comprised of five integral components, explained in [https://rpm.rcabc.org/index.php?title=Guarantee '''The RoofStar™ Guarantee Program''']:
*'''Membership'''
*'''Training'''
*'''Accepted Materials'''
*'''Guarantee Standards'''
*'''Independent Observations'''
 
''Accepted Materials'' (also referred to in this Manual as "Materials", "Accepted Products" or simply as "Products") and accepted systems (such as ''vegetated roof systems'') are critical to the integrity of the '''''The RoofStar™ Guarantee Program'''''. Not every material in the marketplace may be specified and installed in a ''project'' for which a '''''RoofStar Guarantee''''' is required – only those that are accepted by the '''''RGC''''' qualify for a '''''RoofStar Guarantee'''''.

The '''''RGC''''' accepts materials and systems. The '''''RGC''''' does not approve them, endorse them, recommend them, or promote them. They are "accepted" because they are made by RCABC Member manufacturers who support their materials and systems with a bond. Furthermore, those materials and systems conform to objective, published, accepted criteria, including acceptance criteria specifications published by the '''''RGC'''''. Consequently, acceptance of materials or systems should not be construed as an indication of the quality or performance of other materials not listed in this ''Manual''. Tables and lists in the RPM are not intended for use as a comparison of material performance or quality. It is the sole responsibility of the ''Design Authority'' to assess the performance capability and material suitability for specific design requirements.

Applications for material acceptance are received and reviewed three times per calendar year – January, May and September. Applications must be received three weeks in advance of the scheduled Technical Committee meeting, or they will be deferred to the next meeting in the rotation. See the [http://www.rcabc.org/events/ '''Events Calendar'''] for the next scheduled Technical Committee meetings.

====1.1.1.2. Qualified Applicants====
Only Members of the '''Roofing Contractors Association of British Columbia''' may apply for Material Acceptance in the '''''RoofStar™ Guarantee Program'''''. To become a member of the RCABC, visit our [http://www.rcabc.org/members/become-a-member/ '''website'''].
<hr>

=Part 2 - Roofing Materials=
==Section 2.1. Roofing Material Classification==

==={{hilite |2.1.1. Material Acceptance Criteria || 2022-June-17 }}===
The RCABC classifies accepted roofing materials (ref. Policy A-041) using three criteria, each with specific Material Application requirements: Primary materials, Secondary materials, and Accessories. Vegetated roofing is classified by system type (extensive, semi-intensive, and intensive), although each constituent material is accepted by the RGC.

====2.1.1.1. Primary Roofing Materials====
<ol>
<li>A ''primary material'' is a waterproofing or water-shedding material which that is usually exposed to the weather and is primarily responsible for protecting ''secondary materials'' and the building interior from water and weather.
<li>Membranes, metal panels, or shingles are typical materials classified as primary but the category “primary material” also includes (without limitation)
<ol>
<li>liquid membrane flashing systems,
<li>vents,
<li>r''oof drains'',
<li>plaza deck drains, and
<li>flashings that enclose penetrations and are integrated with a membrane, metal panel, or shingles.
</li></ol>
<li>An application for acceptance of a ''primary material'' must be supported by
<ol>
<li>a ''manufacturer’s'' material bond (ref. RGC Policy A-078, “Material Acceptance Agreement”, and
<li>RGC Policy A-055, “Associate Member Commitment” (also see RGC Policy A-006, “Active Member Criteria”).
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>Current Technical Data Sheet (TDS); each TDS must be dated and show the current ASTM and or CSA related required tests, including numerical values;
<li>Current application specifications;
<li>Proof of material testing, where required:
<ol>
<li>For all waterproofing roof membranes, this must include current testing using the test method, CSA-A123.21.
<li>All ''Tested Assembly'' reports must be included as a PDF with the application.
</li></ol>
<li>Verifiable marketplace installation in British Columbia, over a period of no less than a two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required);
<li>Independent inspection reports by an accepted Observation Firm and ''Observer'', confirming the performance of the material named on the "RGC Application for Material Acceptance"; and
<li>Approvals (any and all jurisdictions).
</li></ol>
<li>All ''primary materials'' must be supported by the ''manufacturer'' with a local technical representative.
</li></ol>

====2.1.1.2. Secondary Roofing Materials====

<ol>
<li>A ''secondary material'' is one which forms part of a the waterproofing or water-shedding assembly and which may affect the wind resistance characteristics of the entire assembly, but is not necessarily exposed to the weather.
<li>The term secondary material includes (without limitation)
<ol>
<li>deck overlays,
<li>roof underlayment,
<li>eave protection,
<li>insulation,
<li>insulation board overlays,
<li>joint tapes,
<li>fasteners and stress plates,
<li>adhesives, and
<li>primers.
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>A current Technical Data Sheet (TDS),
<li>Current installation/application specifications,
<li>Material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>Verifiable marketplace installation in British Columbia, over a period of no less than two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required).
</li></ol>
</li></ol>

====2.1.1.3. Roofing Accessories====

<ol>
<li>A ''roof system accessory'' is a material that joins ''primary'' or ''secondary materials'' together or is connected to/with a ''primary material'' or ''secondary material'' but does not by its nature (apart from its installation) directly affect the water or wind resistance of the ''waterproofing'' or ''water-shedding assembly''.
<li>The term accessory may include (without limitation)
<ol>
<li>caulking,
<li>sealants, and
<li>mastics.
</li></ol>
<li>''Roof system accessories'' currently are not ‘accepted’ in the '''''RoofStar Guarantee Program'''''. However, ''manufacturers'' or suppliers wishing to have their accessories listed in [[Division C]] of the "RCABC Roofing Practices Manual" must, as a condition for listing, provide the RGC with
<ol>
<li>a current Technical Data Sheet (TDS),
<li>material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>current installation/application specifications.
</li></ol>
</li></ol>

==Section 2.2. Roofing Material Acceptance Criteria==
===2.2.1. General===
====2.2.1.1. Purpose====

Acceptance Criteria created by the '''''RGC''''' ('''''Guarantor''''') are intended solely to establish objective requirements for materials used in the '''''RoofStar™ Guarantee Program''''' (property of the RCABC Guarantee Corp. ('''''RGC''''')) through which the RGC issues the '''''RoofStar Guarantee''''' for ''waterproofing'' and ''water-shedding systems''.
Materials used in the construction of ''waterproofing'' or ''water-shedding systems'' must be accepted by the RGC (Refer to other resources on this page or in this Manual, as they related to acceptance criteria and the application and approval process). RGC Acceptance Criteria are made available only as part of the administrative acceptance process for the '''''RoofStar Guarantee Program''''', for products manufactured by Associate Members of the RCABC. Use of this Acceptance Criteria for any other purpose than that which is stated above shall be at the sole discretion of the user and is not endorsed or condoned by the RGC. Furthermore, this Acceptance Criteria, and the term “accepted”, shall not be construed as a measure of a material’s efficacy or its suitability for any application outside the '''''RoofStar Guarantee Program''''', nor shall it be construed to mean that the '''''Guarantor''''' endorses a product conforming to the requirements set out in this document.

RGC Acceptance Criteria provide guidelines for the material and performance characteristics to which an accepted material must conform. Acceptance is confirmed by the Guarantor through a review of the applicant’s submission and is finally endorsed by the RGC Board of Directors. Accepted materials are periodically reviewed by the '''''RGC''''' for conformity to these criteria, and acceptance may be revoked at any time should the product change so that it no longer conforms.

RGC Acceptance Criteria documents are evaluated periodically by the RGC Technical Committee, which meets throughout the year. The RGC reserves the right under policy to change Acceptance Criteria at any time, and any changes to this Acceptance Criteria shall be effective on the date shown on each Criteria document. Changes will be highlighted for a period of twelve (12) months. Previous versions of this Acceptance Criteria can be requested in writing from the '''''Guarantor'''''.

In the event that a product listed in the '''''RoofStar Guarantee Program''''' is rendered non-conforming by a change in an Acceptance Criteria, the ''manufacturer'' will have up to twelve (12) months from the date of the change to conform to the Acceptance Criteria and resubmit the material for acceptance by the RGC. Non-conforming materials will be removed from the RoofStar Guarantee Program.

The following RGC Acceptance Criteria specifications are available for download and are referenced in one or more Standards published in this ''Manual''. Submitters presenting applications to the RGC for material acceptance must use the RGC Application forms (F-090 or F-090 VRS) for Material Acceptance, available in Part 5 below.

===2.2.2. Acceptance Criteria Specifications===
====2.2.2.1. Acceptance Criteria for Roof Waterproofing System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/9/9e/Acceptance_Criteria_RGC_ACWP-MOD.pdf '''RGC ACWP-MOD'''], "RGC ACCEPTANCE CRITERIA for MANUFACTURED POLYMER-MODIFIED, REINFORCED BITUMINOUS SHEET MEMBRANES Used in Roof Waterproofing and Grade-level Waterproofing Systems"
<li>For acceptance criteria applicable to other roof membranes, refer to Article 9.2.1.1. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for EPDM Membrane Roofs, [https://rpm.rcabc.org/index.php?title=EPDM_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for TPO Membrane Roofs, [https://rpm.rcabc.org/index.php?title=TPO_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for PVC Membrane Roofs, [https://rpm.rcabc.org/index.php?title=PVC_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_SelectionArticle 9.2.1.1.]
:*RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs, [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
</li></ol>

====2.2.2.2. Acceptance Criteria for Roof Water-Shedding System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/7/73/Acceptance_Criteria_RGC_ACWS-ASH.pdf '''RGC ACWS-ASH'''], "RGC ACCEPTANCE CRITERIA for INORGANIC FIBREGLASS-REINFORCED ASPHALT SHINGLES Used in Water-shedding Systems" See also [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#9.2.1.2._Shingles_Acceptable_for_RoofStar_Guarantee Article 9.2.1.2.] in the RGC Standard for Asphalt Shingle Roofs.
<li>For acceptance criteria applicable to metal roof panels, refer to [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.1._Panel_Grade.2C_Gauge.2C_and_Fabrication Article 9.2.1.1.] and (with respect to site-formed panels by RCABC Active (Contractor) Members, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.2._Roll_Forming_Machines_and_Mill_Certificate Article 9.2.1.2.], in the RGC Standard for Architectural Sheet Metal (ASM) Roofs.
</li></ol>

'''Secondary Materials'''
<ol>
<li>[http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf '''RGC ACWS-PUL'''], "RGC ACCEPTANCE CRITERIA for MECHANICALLY ATTACHED POLYMERIC ROOF UNDERLAYMENTS Used in Water-shedding Systems".
<li>For acceptance criteria applicable to self-adhered membranes used as eave and valley protection, refer to Article 8.2.1.2. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for Architectural Sheet Metal (ASM) Roofs, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
:*RGC Standard for Asphalt Shingle Roofs, [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
</li></ol>

====2.2.2.3. Acceptance Criteria for Roof Grade-level Waterproofing System materials====
:Under development

<hr>

=Part 3 - Vegetated Roof Systems=
==Section 3.1. Classification and Basis of Acceptance==
===3.1.1. Categories===
''Vegetated Roof Systems'' are classified in three broad categories: ''Extensive Systems'', ''Semi-intensive Systems'', and ''Intensive Systems''. There are no ‘hard and fast’ ways to define these, but there are principles and parameters that help the reader to understand what each category means. What is explained below is borrowed from both the “RGC Standard for Vegetated Roofs” (the Standard) and the Notes for the Standard.

====3.1.1.1. Extensive Vegetated Roof Systems====

<ol>
<li>The term ''Extensive Vegetated Roof'', "extensive green roof", and variations thereof, refers to a relatively light-weight ''green roof'' that is often inaccessible, is typically shallow (''growing media'' no deeper than 203.2 mm (8”), is comprised of limited plant diversity (often, plant species of the same genus), and requires minimal maintenance (adapted from the Standard, [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.1.4._Defined_Terms Article 1.1.1.4. Defined Terms]).
<li>When ''extensive vegetated roof systems'' are comprised of either pre-grown trays or mats, both the ''vegetated roof system manufacturer'' and the RGC jointly agree to cover the vegetation (as described on the Guarantee Certificate and in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1. of Division A]). The system manufacturer’s warranty is the primary responder to any claim for inadequate surface coverage, and for any failure of the system components.
</li></ol>

====3.1.1.2. Semi-Intensive Vegetated Roof Systems====

<ol>
<li>The term ''semi-intensive green roof'' (also referred to as "semi-intensive vegetated system", "semi-intensive assembly", or "semi-intensive") means a mid-weight, moderate height ''green roof'' that may be accessible to people, is generally of moderate depth (growing media depth ranging from 152.4 mm (6”) to 355.6 mm (14”), is typified by increased plant diversity, and requires moderate maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.3. Intensive Vegetated Roof Systems====

<ol>
<li>The term ''intensive green roof'' (Also referred to as "intensive vegetated roof system", "intensive assembly", or "intensive") means a heavier ''green roof'' that is usually accessible to people, is generally deep (growing media greater than 355.6 mm (14”)), supports a very diverse plant profile that may include trees, and requires considerable maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.4. Hybrid Vegetated Roof Systems====

<ol>
<li>Hybrid ''green roof'' systems combine a ''green roof system'' (usually ''extensive'') with water retention or detention, either captured in purpose-made materials or free-standing in a reservoir beneath the ''green roof''.
<li>Hybrid systems are permitted only on ''protected membrane roof assemblies'' and while some manufacturers offer them on ''conventionally insulated'' roofs, they must be redesigned to conform to the RGC Standard or submitted to the '''''Guarantor''''' for consideration under a written Variance.
<li>Roof membrane selection is a key point of consideration for these systems, since hydrostatic pressures may be higher than those expected on any other iteration of a ''protected roof''.
</li></ol>

====3.1.1.5. Other Systems====

<ol>
<li>The category "Other Systems" simply refers to ''green roofs'' that may be designed for purposes other than (or in addition to) their usual functions, such as stormwater management (For example, some vegetated systems are designed by the manufacturer as ballast for a photovoltaic assembly).
<li>While the '''''RGC''''' does not accept photovoltaics as a system or materials covered by a '''''RoofStar Guarantee''''', the ''vegetated roof system'' itself can be accepted and is listed in the ''Manual'' under the category heading, "Other Systems."
</li></ol>

===3.1.2. Systems and Materials===
====3.1.2.1. Systems Proprietary to Manufacturer====
<ol>
<li>''Vegetated roof systems'' must be produced, distributed, and warrantied by a ''vegetated roof system manufacturer''.
<li>A ''vegetated roof system manufacturer'' is defined in the Standard as “an Associate or Affiliate member of the RCABC who manufactures the ''vegetated roof system''”, but when the ''vegetated roof system manufacturer'' is an Affiliate member of the RCABC, the Affiliate Member must obtain and provide to the roofing ''Contractor'' (RCABC Active Member) “a formalized single source warranty agreement with a roof system ''manufacturer'' who is an Associate member of the RCABC).
<li>A ''single source warranty agreement'' “means an agreement between an RCABC Associate member and an RCABC Affiliate member, in which the Associate member permits the Affiliate member’s ''vegetated roof system'' on the Associate member’s primary roof covering without compromising coverage under the '''''RoofStar Guarantee Program'''''.
<li>A ''single source warranty agreement'' may be a standing agreement with a ''manufacturer'', or it may be project-specific.
<li>For a ''single source warranty agreement'' to be valid, the agreement must be formalized and the signed, dated document shall form part of the '''''Guarantor’s''''' records.
</li></ol>

===3.1.3. Warranties===
====3.1.3.1. Vegetated Roof System Manufacturer Warranties====
<ol>
<li>The ''vegetated roof system manufacturer’s'' warranty forms the primary basis of coverage under the '''''RoofStar Guarantee Program''''' and is required for a ''project'' intended to qualify for a '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

<hr>

=Part 4 - Labeling and Branding=
==Section 4.1. General==
===4.1.1. Product Criteria===
Product labeling impacts both RCABC membership requirements and the way in which the material application is considered for acceptance. The '''''RoofStar Guarantee Program''''' uses the criteria explained below for the evaluation and acceptance of materials.

====4.1.1.1. Branded (or Proprietary) Materials====
<ol>
<li>Branded, or "proprietary", is the term used to indicate that a product has been made by, and labeled exclusively with the name of, the ''manufacturer''.
<li>These products are packaged with the explicit identification of the ''manufacturer'', they have been tested by the ''manufacturer'', and the technical data sheet will show that the ''manufacturer'' has undertaken this Due Diligence.
<li>When a material is said to be branded, the ''manufacturer'' carries the liability for the product and, as such, the material bond attaches to any of the ''manufacturer’s'' products accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>

====4.1.1.2. Private Labeled Materials====
<ol>
<li>The term “private labeled” means a product manufactured by one company for another ''manufacturer'', distributor, or installer (the distributor or seller), and where the product packaging (and on the product itself, if the product is amenable to labeling) shows only the name of the distributor or seller.
<li>When a material is said to be private labeled, the material specifications may be substantively different from those of its ‘cousin’ product; it is the distributor or seller whose name the private labelled material carries, not the original ''manufacturer'',
<ol>
<li>who is legally liable for the product, and
<li>who is responsible for testing.
</li></ol>
<li>The technical data sheet will carry only the distributor’s or seller’s name on it, as if they had manufactured it, which means the actual ''manufacturer’s'' material bond will not attach to the product, should it fail.
<li>For private labeled materials, a new material application is required, regardless of the ''manufacturer'' or the material’s similarities to an Accepted Material. Furthermore, all bond requirements apply to the distributor or seller regardless of who manufactured the product.
</li></ol>

====4.1.1.3. Co-Branded Materials====
<ol>
<li>The term “co-branded” means products labeled both with the ''manufacturer’s'' name and with the name of a distributor/installer who wishes to use it for advertising.
<li>When a material is said to be co-branded,
<ol>
<li>the material packaging identifies the ''manufacturer'' (though perhaps not always exclusively), and
<li>the ''manufacturer'' pays for the tests and is fully liable for any product failures, which means the material bond posted by the ''manufacturer'' attaches to a co-branded product.
</li></ol>
<li>For ''manufacturers'' whose product already has acceptance in the '''''RoofStar Guarantee Program''''', no new Accepted Material application is required for an identical co-branded product.
<li>Notwithstanding the foregoing, the '''''RGC''''' reserves the right to examine the technical data of a co-branded product to verify its acceptability.
</li></ol>

<hr>

=Part 5 - Acceptance and Changes=
==Section 5.1. General==
===5.1.1. Application Process===
====5.1.1.1. General Requirements====
Most applicants submit an application for acceptance of a new product – something that has not already been accepted by the '''''RGC'''''. However, accepted materials or systems sometimes undergo a name change, or they are discontinued and replaced. It may also happen that a Member has produced a new product substantially similar to one already accepted by the '''''RGC''''' and is promoted by the ''manufacturer'' as an improvement. The '''''RGC''''' provides simplified, transparent options for applying for material and system acceptance, and all of these options are covered in this Part. The following general conditions apply to material or system changes, substitutions, discontinuations, or name changes.

<ol>
<li>Every applicant must ensure that they have already completed the basic administrative forms and signed the appropriate policies.
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>A product or system that is not replacing a material or system already accepted by the '''''RGC''''' is considered a new material or system and therefore must be submitted for acceptance by the '''''Guarantor''''' with a completed set of forms, either as a new Member (See Sub-section 4.1.3.) or as an existing RCABC Member (Sub-section 5.1.3.).
</li></ol>
</li></ol>

===5.1.2. All RCABC Member Manufacturers===
====5.1.2.1. General====
<ol>
<li>Applications for material acceptance will be handled on the basis of “first come, first served”, but the RGC Administration reserves the right to cap the number of applications and give priority to new material applications.
<li>Documents, including but not limited to Technical Data Sheets, Application (installation) Guides, and third-party field reviews, must not be locked or password protected; locked or password protected documents will be rejected and the application package will be labelled "Incomplete".
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>To use the forms linked below,
<ol>
<li>Download and save a blank copy to your computer or server,
<li>Reopen the file with [https://get.adobe.com/reader/ '''Adobe Acrobat'''] or another PDF reading/writing program to activate the fillable field function,
<li>Complete the form and save it, and
<li>Submit completed forms electronically to the [mailto:technical@rcabc.org '''''RoofStar Guarantee Program'''''] and indicate “New Material Acceptance application” in the Subject line.
</li></ol>
</li></ol>

====5.1.2.2. RCABC Policies====
<ol>
<li>Acceptance of materials and systems for installation in a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee''''', is governed by RCABC policies.
<li>Every Associate Member manufacturer making application for acceptance of a new waterproofing or water-shedding material or system agrees to abide by the following RCABC policies and must complete and submit RCABC Policy A-078, "Material Acceptance Agreement" (one time only, unless a signed updated version is required).
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>Every Associate or Affiliate Member manufacturer making application for acceptance of a new ''vegetated roof system'' agrees to abide by the following RCABC policies and must complete and submit Policy A-078 (one time only, unless a signed updated version is required):
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>In addition to the policies listed in Sentence (3), every Affiliate Member of the RCABC who manufactures an accepted ''vegetated roof system'' must abide by Policy A-316, "Affiliate Membership Criteria."
<li>Member copies of RCABC policies can be procured from [mailto:rkoppen@rcabc.org '''RCABC Member Services'''].
</li></ol>
</li></ol>

====5.1.2.3. Bonding====
<ol>
<li>All primary materials, and all ''vegetated roof systems'', must be covered by an annually-renewable bond procured by the RCABC Member manufacturer and presented to the '''''RGC''''' for safekeeping in the Member's records.
<li>Member bonding is covered by RCABC Policy A-080, "Material Bond"; see the bond amount requirements in RCABC Policy A-078 for Associate Members, and RCABC Policy A-316 for Affiliate Members (with respect to ''vegetated roof systems'').
<li>Bonds will be exercised only if and when an RCABC Member manufacturer defaults in their obligations under RCABC policy to respond to a claim against the manufacturer's material or system, when that material or system is part of a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

====5.1.2.4. Forms for Water-proofing and Water-shedding Systems and Materials====

<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms specifically relate to applications for acceptance of materials and systems used in waterproofing and water-shedding projects:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application):
<ol>
<li>For F-090 is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.5. Forms for Vegetated Roof Systems====
<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms pertain to applications for acceptance of ''vegetated roof systems'' and their component materials:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<ol>
<li>Form F-090 VRS is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 VRS must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.6. Applications by RCABC Manufacturers of Current Accepted Materials or Systems====
<ol>
<li>RCABC Members whose materials or systems are already accepted by the '''''RGC''''' and listed in [[Division C]] of the RPM do not need to resubmit signed policies or forms that constitute a first-time application (unless those policies have been renewed and a new commitment by the Member is required).
<li>All applications for the acceptance of water-proofing or water-shedding materials or systems must include the following forms:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application)
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
<li>All applications for the acceptance of ''vegetated roof systems'' must include the following forms:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

===5.1.3. Application Review and Acceptance===
====5.1.3.1. Product and System Samples====
<ol>
<li>At least one product sample must accompany an application for acceptance of a new material submitted for examination by the RGC Technical Committee.
<li>Samples must be submitted with an application for acceptance. Failure to supply a sample may result in the rejection of the application.
</li></ol>

====5.1.3.2. Administrative Review Process====
<ol>
<li>Applications for Material Acceptance are reviewed by the RCABC Technical Department of the '''''RoofStar Guarantee Program'''''; questions about the application process or acceptance criteria can be directed to the [mailto:guarantees@rcabc.org '''''RoofStar Guarantee Program'''''] via email, or by calling (604) 882-9734.
<li>The RCABC Technical Department occasionally processes acceptance of materials or systems under its administrative powers, for materials or systems that do not require formal review and consent by the RGC Technical Committee or the RGC Board of Directors, and administrative acceptance is granted at the discretion of the RCABC Technical Department and is subject to operational policy.
</li></ol>

====5.1.3.3. RGC Technical Committee====

<ol>
<li>Each completed application is reviewed by the RCABC Technical Department and subsequently presented to the RGC Technical Committee, which accepts or rejects the application.
<li>The RGC Technical Committee reports to the to the RGC Board of Directors and recommends acceptance or rejection of each material or assembly it reviews.
<li>The RGC Technical Committee meets three times per year to review applications for acceptance - January, May, and October. Cut-off dates for applications are published in the [https://www.rcabc.org/events/ '''''RCABC Calendar of Events'''''] on the RCABC website.
</li></ol>

====5.1.3.4. RGC Board of Directors====
<ol>
<li>Final acceptance of a material or system rests with the RGC Board of Directors, which meets several weeks after each of the RGC Technical Committee Meetings.
<li>Once a material or system has been accepted by the Board, the RCABC Technical Department lists the materials or systems in Division C of the RPM.
<li>If the applicant is a new RCABC Member, listing of accepted materials or systems will be on a new Member page in Division C.
<li>Any questions concerning the listing of materials or systems in Division C should be directed to the [mailto:technical@rcabc.org '''''RCABC Technical Department'''''].
</li></ol>

===5.1.4. Names Changes, Substitutions, and Discontinued Materials or Systems===
====5.1.4.1. General====

<ol>
<li>A change of product name, the introduction of a new product that is similar to one already accepted by the '''''RGC''''', or products that have been discontinued, all can materially affect the '''''RoofStar Guarantee Program''''', and are therefore managed by the '''''Guarantor''''' through the guidelines and procedures of this Subsection, with reference to and in support of RCABC Policy A-055, “Associate Member Commitment” and Policy A-316, “Affiliate Membership Criteria”.
</li></ol>

====5.1.4.2. Name Changes====

<ol>
<li>When a ''manufacturer'' notifies the '''''Guarantor''''' that an accepted material has been renamed, or when the '''''Guarantor''''' discovers that an accepted material has been renamed, the ''manufacturer'' must immediately support that claim with a new technical data sheet verifying that only the name has changed.
<li>A name change that is not supported by the ''manufacturer’s'' published technical literature will be deleted from result in the deletion of the product from the '''''RoofStar Guarantee Program''''' and [[Division C]] of the RPM.
</li></ol>

====5.1.4.3. Substitutions or Additions====

<ol>
<li>All applications for substitution or additions shall follow the typical process for a new material application.
<li>When an RCABC Member manufactures a material or system that replaces a material or system already accepted by the '''''RGC''''', and the replacement material or system is said to be equivalent to the old one, the RCABC Technical Department may grant the applicant permission to apply for acceptance through a shorter application process without requiring either documented marketplace experience or a formal review and acceptance by the RGC Technical Committee:
<ol>
<li>The shorter application process for the acceptance of materials is governed by RCABC Policy A-041 and is limited to materials offered by the ''manufacturer'' as
<ol>
<li>a substantially equivalent substitution for a material currently accepted for use in the '''''RoofStar Guarantee Program''''', but which has been discontinued from production by the manufacturer,
<li>an improved replacement for a material already accepted for use in the '''''RoofStar Guarantee Program''''', or
<li>an improved material substantially similar to, and intended as an addition to, a material already accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>
<li>To apply for a material substitution or addition, each RCABC Member manufacturer must (through its representative)
<ol>
<li>submit an F-090 Application form (requiring the RCABC Member manufacturer to provide a detailed explanation of the product changes or improvements) and make a declaration in the space provided, that the new material or system is substantially equivalent to the material or system it will replace or will improve upon and complement,
<li>submit the technical data sheets and other required documentation (independent test reports, if required by an RGC Acceptance Criteria specification), both for any discontinued product or system, and for newly submitted materials, and
<li>submit test data from a qualified lab/facility (where testing is required), demonstrating that the new material or system has met or exceeded specific test requirements (for example, that a sheet membrane has been tested under CSA-A123.21, or that a ''vegetated roof systems'' has been tested under CSA-A123.24).
</li></ol>
<li>Applications utilizing the shorter application process will be reviewed on an ongoing basis by the '''''Guarantor''''', and decisions presented to the RGC Technical Committee only for information purposes.
<li>Notwithstanding the foregoing, the '''''Guarantor''''' reserves the right to reject the applicant’s claims and to require an applicant to submit a full application complete with a marketplace product history.
</li></ol>
</li></ol>

====5.1.4.4. Material Discontinuance====
<ol>
<li>A ''manufacturer'' who has discontinued production or distribution of a material accepted by the '''''RGC''''' must, under the terms of RCABC Policy A-041, “Material Acceptance Criteria”, forthwith notify the '''''Guarantor''''' of that product’s discontinuance, at which time the '''''Guarantor''''' will remove it from its listing in [[Division C]] of the RPM.
</li></ol>

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Material Classification and Application for Acceptance

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<big><big>Division C - Accepted Materials</big></big>
<hr>
<big><big><big><big><big><big>Material Classification and Application for Acceptance</big></big></big></big></big></big>

=Part 1 - General=
==Section 1.1. Purpose==
===1.1.1. Accepted Materials and Systems in RoofStar Guarantee Program===
====1.1.1.1. General====
The '''''RoofStar Guarantee Program''''' is comprised of five integral components, explained in [https://rpm.rcabc.org/index.php?title=Guarantee '''The RoofStar™ Guarantee Program''']:
*'''Membership'''
*'''Training'''
*'''Accepted Materials'''
*'''Guarantee Standards'''
*'''Independent Observations'''
 
''Accepted Materials'' (also referred to in this Manual as "Materials", "Accepted Products" or simply as "Products") and accepted systems (such as ''vegetated roof systems'') are critical to the integrity of the '''''The RoofStar™ Guarantee Program'''''. Not every material in the marketplace may be specified and installed in a ''project'' for which a '''''RoofStar Guarantee''''' is required – only those that are accepted by the '''''RGC''''' qualify for a '''''RoofStar Guarantee'''''.

The '''''RGC''''' accepts materials and systems. The '''''RGC''''' does not approve them, endorse them, recommend them, or promote them. They are "accepted" because they are made by RCABC Member manufacturers who support their materials and systems with a bond. Furthermore, those materials and systems conform to objective, published, accepted criteria, including acceptance criteria specifications published by the '''''RGC'''''. Consequently, acceptance of materials or systems should not be construed as an indication of the quality or performance of other materials not listed in this ''Manual''. Tables and lists in the RPM are not intended for use as a comparison of material performance or quality. It is the sole responsibility of the ''Design Authority'' to assess the performance capability and material suitability for specific design requirements.

Applications for material acceptance are received and reviewed three times per calendar year – January, May and September. Applications must be received three weeks in advance of the scheduled Technical Committee meeting, or they will be deferred to the next meeting in the rotation. See the [http://www.rcabc.org/events/ '''Events Calendar'''] for the next scheduled Technical Committee meetings.

====1.1.1.2. Qualified Applicants====
Only Members of the '''Roofing Contractors Association of British Columbia''' may apply for Material Acceptance in the '''''RoofStar™ Guarantee Program'''''. To become a member of the RCABC, visit our [http://www.rcabc.org/members/become-a-member/ '''website'''].
<hr>

=Part 2 - Roofing Materials=
==Section 2.1. Roofing Material Classification==

==={{hilite |2.1.1. Material Acceptance Criteria || 2022-June-17 }}===
The RCABC classifies accepted roofing materials (ref. Policy A-041) using three criteria, each with specific Material Application requirements: Primary materials, Secondary materials, and Accessories. Vegetated roofing is classified by system type (extensive, semi-intensive, and intensive), although each constituent material is accepted by the RGC.

====2.1.1.1. Primary Roofing Materials====
<ol>
<li>A ''primary material'' is a waterproofing or water-shedding material which that is usually exposed to the weather and is primarily responsible for protecting ''secondary materials'' and the building interior from water and weather.
<li>Membranes, metal panels, or shingles are typical materials classified as primary but the category “primary material” also includes (without limitation)
<ol>
<li>liquid membrane flashing systems,
<li>vents,
<li>r''oof drains'',
<li>plaza deck drains, and
<li>flashings that enclose penetrations and are integrated with a membrane, metal panel, or shingles.
</li></ol>
<li>An application for acceptance of a ''primary material'' must be supported by
<ol>
<li>a ''manufacturer’s'' material bond (ref. RGC Policy A-078, “Material Acceptance Agreement”, and
<li>RGC Policy A-055, “Associate Member Commitment” (also see RGC Policy A-006, “Active Member Criteria”).
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>Current Technical Data Sheet (TDS); each TDS must be dated and show the current ASTM and or CSA related required tests, including numerical values;
<li>Current application specifications;
<li>Proof of material testing, where required:
<ol>
<li>For all waterproofing roof membranes, this must include current testing using the test method, CSA-A123.21.
<li>All ''Tested Assembly'' reports must be included as a PDF with the application.
</li></ol>
<li>Verifiable marketplace installation in British Columbia, over a period of no less than a two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required);
<li>Independent inspection reports by an accepted Observation Firm and ''Observer'', confirming the performance of the material named on the "RGC Application for Material Acceptance"; and
<li>Approvals (any and all jurisdictions).
</li></ol>
<li>All ''primary materials'' must be supported by the ''manufacturer'' with a local technical representative.
</li></ol>

====2.1.1.2. Secondary Roofing Materials====

<ol>
<li>A ''secondary material'' is one which forms part of a the waterproofing or water-shedding assembly and which may affect the wind resistance characteristics of the entire assembly, but is not necessarily exposed to the weather.
<li>The term secondary material includes (without limitation)
<ol>
<li>deck overlays,
<li>roof underlayment,
<li>eave protection,
<li>insulation,
<li>insulation board overlays,
<li>joint tapes,
<li>fasteners and stress plates,
<li>adhesives, and
<li>primers.
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>A current Technical Data Sheet (TDS),
<li>Current installation/application specifications,
<li>Material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>Verifiable marketplace installation in British Columbia, over a period of no less than two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required).
</li></ol>
</li></ol>

====2.1.1.3. Roofing Accessories====

<ol>
<li>A ''roof system accessory'' is a material that joins ''primary'' or ''secondary materials'' together or is connected to/with a ''primary material'' or ''secondary material'' but does not by its nature (apart from its installation) directly affect the water or wind resistance of the ''waterproofing'' or ''water-shedding assembly''.
<li>The term accessory may include (without limitation)
<ol>
<li>caulking,
<li>sealants, and
<li>mastics.
</li></ol>
<li>''Roof system accessories'' currently are not ‘accepted’ in the '''''RoofStar Guarantee Program'''''. However, ''manufacturers'' or suppliers wishing to have their accessories listed in [[Division C]] of the "RCABC Roofing Practices Manual" must, as a condition for listing, provide the RGC with
<ol>
<li>a current Technical Data Sheet (TDS),
<li>material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>current installation/application specifications.
</li></ol>
</li></ol>

==Section 2.2. Roofing Material Acceptance Criteria==
===2.2.1. General===
====2.2.1.1. Purpose====

Acceptance Criteria created by the '''''RGC''''' ('''''Guarantor''''') are intended solely to establish objective requirements for materials used in the '''''RoofStar™ Guarantee Program''''' (property of the RCABC Guarantee Corp. ('''''RGC''''')) through which the RGC issues the '''''RoofStar Guarantee''''' for ''waterproofing'' and ''water-shedding systems''.
Materials used in the construction of ''waterproofing'' or ''water-shedding systems'' must be accepted by the RGC (Refer to other resources on this page or in this Manual, as they related to acceptance criteria and the application and approval process). RGC Acceptance Criteria are made available only as part of the administrative acceptance process for the '''''RoofStar Guarantee Program''''', for products manufactured by Associate Members of the RCABC. Use of this Acceptance Criteria for any other purpose than that which is stated above shall be at the sole discretion of the user and is not endorsed or condoned by the RGC. Furthermore, this Acceptance Criteria, and the term “accepted”, shall not be construed as a measure of a material’s efficacy or its suitability for any application outside the '''''RoofStar Guarantee Program''''', nor shall it be construed to mean that the '''''Guarantor''''' endorses a product conforming to the requirements set out in this document.

RGC Acceptance Criteria provide guidelines for the material and performance characteristics to which an accepted material must conform. Acceptance is confirmed by the Guarantor through a review of the applicant’s submission and is finally endorsed by the RGC Board of Directors. Accepted materials are periodically reviewed by the '''''RGC''''' for conformity to these criteria, and acceptance may be revoked at any time should the product change so that it no longer conforms.

RGC Acceptance Criteria documents are evaluated periodically by the RGC Technical Committee, which meets throughout the year. The RGC reserves the right under policy to change Acceptance Criteria at any time, and any changes to this Acceptance Criteria shall be effective on the date shown on each Criteria document. Changes will be highlighted for a period of twelve (12) months. Previous versions of this Acceptance Criteria can be requested in writing from the '''''Guarantor'''''.

In the event that a product listed in the '''''RoofStar Guarantee Program''''' is rendered non-conforming by a change in an Acceptance Criteria, the ''manufacturer'' will have up to twelve (12) months from the date of the change to conform to the Acceptance Criteria and resubmit the material for acceptance by the RGC. Non-conforming materials will be removed from the RoofStar Guarantee Program.

The following RGC Acceptance Criteria specifications are available for download and are referenced in one or more Standards published in this ''Manual''. Submitters presenting applications to the RGC for material acceptance must use the RGC Application forms (F-090 or F-090 VRS) for Material Acceptance, available in Part 5 below.

===2.2.2. Acceptance Criteria Specifications===
====2.2.2.1. Acceptance Criteria for Roof Waterproofing System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/9/9e/Acceptance_Criteria_RGC_ACWP-MOD.pdf '''RGC ACWP-MOD'''], "RGC ACCEPTANCE CRITERIA for MANUFACTURED POLYMER-MODIFIED, REINFORCED BITUMINOUS SHEET MEMBRANES Used in Roof Waterproofing and Grade-level Waterproofing Systems"
<li>For acceptance criteria applicable to other roof membranes, refer to Article 9.2.1.1. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for EPDM Membrane Roofs, [https://rpm.rcabc.org/index.php?title=EPDM_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for TPO Membrane Roofs, [https://rpm.rcabc.org/index.php?title=TPO_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for PVC Membrane Roofs, [https://rpm.rcabc.org/index.php?title=PVC_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_SelectionArticle 9.2.1.1.]
:*RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs, [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
</li></ol>

====2.2.2.2. Acceptance Criteria for Roof Water-Shedding System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/7/73/Acceptance_Criteria_RGC_ACWS-ASH.pdf '''RGC ACWS-ASH'''], "RGC ACCEPTANCE CRITERIA for INORGANIC FIBREGLASS-REINFORCED ASPHALT SHINGLES Used in Water-shedding Systems" See also [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#9.2.1.2._Shingles_Acceptable_for_RoofStar_Guarantee Article 9.2.1.2.] in the RGC Standard for Asphalt Shingle Roofs.
<li>For acceptance criteria applicable to metal roof panels, refer to [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.1._Panel_Grade.2C_Gauge.2C_and_Fabrication Article 9.2.1.1.] and (with respect to site-formed panels by RCABC Active (Contractor) Members, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.2._Roll_Forming_Machines_and_Mill_Certificate Article 9.2.1.2.], in the RGC Standard for Architectural Sheet Metal (ASM) Roofs.
</li></ol>

'''Secondary Materials'''
<ol>
<li>[http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf '''RGC ACWS-PUL'''], "RGC ACCEPTANCE CRITERIA for MECHANICALLY ATTACHED POLYMERIC ROOF UNDERLAYMENTS Used in Water-shedding Systems".
<li>For acceptance criteria applicable to self-adhered membranes used as eave and valley protection, refer to Article 8.2.1.2. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for Architectural Sheet Metal (ASM) Roofs, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
:*RGC Standard for Asphalt Shingle Roofs, [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
</li></ol>

====2.2.2.3. Acceptance Criteria for Roof Grade-level Waterproofing System materials====
:Under development

<hr>

=Part 3 - Vegetated Roof Systems=
==Section 3.1. Classification and Basis of Acceptance==
===3.1.1. Categories===
''Vegetated Roof Systems'' are classified in three broad categories: ''Extensive Systems'', ''Semi-intensive Systems'', and ''Intensive Systems''. There are no ‘hard and fast’ ways to define these, but there are principles and parameters that help the reader to understand what each category means. What is explained below is borrowed from both the “RGC Standard for Vegetated Roofs” (the Standard) and the Notes for the Standard.

====3.1.1.1. Extensive Vegetated Roof Systems====

<ol>
<li>The term ''Extensive Vegetated Roof'', "extensive green roof", and variations thereof, refers to a relatively light-weight ''green roof'' that is often inaccessible, is typically shallow (''growing media'' no deeper than 203.2 mm (8”), is comprised of limited plant diversity (often, plant species of the same genus), and requires minimal maintenance (adapted from the Standard, [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.1.4._Defined_Terms Article 1.1.1.4. Defined Terms]).
<li>When ''extensive vegetated roof systems'' are comprised of either pre-grown trays or mats, both the ''vegetated roof system manufacturer'' and the RGC jointly agree to cover the vegetation (as described on the Guarantee Certificate and in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1. of Division A]). The system manufacturer’s warranty is the primary responder to any claim for inadequate surface coverage, and for any failure of the system components.
</li></ol>

====3.1.1.2. Semi-Intensive Vegetated Roof Systems====

<ol>
<li>The term ''semi-intensive green roof'' (also referred to as "semi-intensive vegetated system", "semi-intensive assembly", or "semi-intensive") means a mid-weight, moderate height ''green roof'' that may be accessible to people, is generally of moderate depth (growing media depth ranging from 152.4 mm (6”) to 355.6 mm (14”), is typified by increased plant diversity, and requires moderate maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.3. Intensive Vegetated Roof Systems====

<ol>
<li>The term ''intensive green roof'' (Also referred to as "intensive vegetated roof system", "intensive assembly", or "intensive") means a heavier ''green roof'' that is usually accessible to people, is generally deep (growing media greater than 355.6 mm (14”)), supports a very diverse plant profile that may include trees, and requires considerable maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.4. Hybrid Vegetated Roof Systems====

<ol>
<li>Hybrid ''green roof'' systems combine a ''green roof system'' (usually ''extensive'') with water retention or detention, either captured in purpose-made materials or free-standing in a reservoir beneath the ''green roof''.
<li>Hybrid systems are permitted only on ''protected membrane roof assemblies'' and while some manufacturers offer them on ''conventionally insulated'' roofs, they must be redesigned to conform to the RGC Standard or submitted to the '''''Guarantor''''' for consideration under a written Variance.
<li>Roof membrane selection is a key point of consideration for these systems, since hydrostatic pressures may be higher than those expected on any other iteration of a ''protected roof''.
</li></ol>

====3.1.1.5. Other Systems====

<ol>
<li>The category "Other Systems" simply refers to ''green roofs'' that may be designed for purposes other than (or in addition to) their usual functions, such as stormwater management (For example, some vegetated systems are designed by the manufacturer as ballast for a photovoltaic assembly).
<li>While the '''''RGC''''' does not accept photovoltaics as a system or materials covered by a '''''RoofStar Guarantee''''', the ''vegetated roof system'' itself can be accepted and is listed in the ''Manual'' under the category heading, "Other Systems."
</li></ol>

===3.1.2. Systems and Materials===
====3.1.2.1. Systems Proprietary to Manufacturer====
<ol>
<li>''Vegetated roof systems'' must be produced, distributed, and warrantied by a ''vegetated roof system manufacturer''.
<li>A ''vegetated roof system manufacturer'' is defined in the Standard as “an Associate or Affiliate member of the RCABC who manufactures the ''vegetated roof system''”, but when the ''vegetated roof system manufacturer'' is an Affiliate member of the RCABC, the Affiliate Member must obtain and provide to the roofing ''Contractor'' (RCABC Active Member) “a formalized single source warranty agreement with a roof system ''manufacturer'' who is an Associate member of the RCABC).
<li>A ''single source warranty agreement'' “means an agreement between an RCABC Associate member and an RCABC Affiliate member, in which the Associate member permits the Affiliate member’s ''vegetated roof system'' on the Associate member’s primary roof covering without compromising coverage under the '''''RoofStar Guarantee Program'''''.
<li>A ''single source warranty agreement'' may be a standing agreement with a ''manufacturer'', or it may be project-specific.
<li>For a ''single source warranty agreement'' to be valid, the agreement must be formalized and the signed, dated document shall form part of the '''''Guarantor’s''''' records.
</li></ol>

===3.1.3. Warranties===
====3.1.3.1. Vegetated Roof System Manufacturer Warranties====
<ol>
<li>The ''vegetated roof system manufacturer’s'' warranty forms the primary basis of coverage under the '''''RoofStar Guarantee Program''''' and is required for a ''project'' intended to qualify for a '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

<hr>

=Part 4 - Labeling and Branding=
==Section 4.1. General==
===4.1.1. Product Criteria===
Product labeling impacts both RCABC membership requirements and the way in which the material application is considered for acceptance. The '''''RoofStar Guarantee Program''''' uses the criteria explained below for the evaluation and acceptance of materials.

====4.1.1.1. Branded (or Proprietary) Materials====
<ol>
<li>Branded, or "proprietary", is the term used to indicate that a product has been made by, and labeled exclusively with the name of, the ''manufacturer''.
<li>These products are packaged with the explicit identification of the ''manufacturer'', they have been tested by the ''manufacturer'', and the technical data sheet will show that the ''manufacturer'' has undertaken this Due Diligence.
<li>When a material is said to be branded, the ''manufacturer'' carries the liability for the product and, as such, the material bond attaches to any of the ''manufacturer’s'' products accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>

====4.1.1.2. Private Labeled Materials====
<ol>
<li>The term “private labeled” means a product manufactured by one company for another ''manufacturer'', distributor, or installer (the distributor or seller), and where the product packaging (and on the product itself, if the product is amenable to labeling) shows only the name of the distributor or seller.
<li>When a material is said to be private labeled, the material specifications may be substantively different from those of its ‘cousin’ product; it is the distributor or seller whose name the private labelled material carries, not the original ''manufacturer'',
<ol>
<li>who is legally liable for the product, and
<li>who is responsible for testing.
</li></ol>
<li>The technical data sheet will carry only the distributor’s or seller’s name on it, as if they had manufactured it, which means the actual ''manufacturer’s'' material bond will not attach to the product, should it fail.
<li>For private labeled materials, a new material application is required, regardless of the ''manufacturer'' or the material’s similarities to an Accepted Material. Furthermore, all bond requirements apply to the distributor or seller regardless of who manufactured the product.
</li></ol>

====4.1.1.3. Co-Branded Materials====
<ol>
<li>The term “co-branded” means products labeled both with the ''manufacturer’s'' name and with the name of a distributor/installer who wishes to use it for advertising.
<li>When a material is said to be co-branded,
<ol>
<li>the material packaging identifies the ''manufacturer'' (though perhaps not always exclusively), and
<li>the ''manufacturer'' pays for the tests and is fully liable for any product failures, which means the material bond posted by the ''manufacturer'' attaches to a co-branded product.
</li></ol>
<li>For ''manufacturers'' whose product already has acceptance in the '''''RoofStar Guarantee Program''''', no new Accepted Material application is required for an identical co-branded product.
<li>Notwithstanding the foregoing, the '''''RGC''''' reserves the right to examine the technical data of a co-branded product to verify its acceptability.
</li></ol>

<hr>

=Part 5 - Acceptance and Changes=
==Section 5.1. General==
===5.1.1. Application Process===
====5.1.1.1. General Requirements====
The '''''RGC''''' provides simplified, transparent options for applying for material and system acceptance. Every applicant must ensure that they have already completed the basic administrative forms and signed the appropriate policies.

Most applicants submit an application for acceptance of a new product – something that has not already been accepted by the '''''RGC'''''. However, accepted materials or systems sometimes undergo a name change, or they are discontinued and replaced. It may also happen that a Member has produced a new product substantially similar to one already accepted by the '''''RGC''''' and is promoted by the ''manufacturer'' as an improvement. All of these options are covered in this Part.

When is a new application required by the '''''RGC'''''? A product or system that is not replacing a material or system already accepted by the '''''RGC''''' is considered a new material or system and therefore must be submitted for acceptance by the '''''Guarantor''''' with a completed set of forms, either as a new Member (See Sub-section 4.1.3.) or as an existing RCABC Member (Sub-section 5.1.3.).

===5.1.2. All RCABC Member Manufacturers===
====5.1.2.1. General====
<ol>
<li>Applications for material acceptance will be handled on the basis of “first come, first served”, but the RGC Administration reserves the right to cap the number of applications and give priority to new material applications.
<li>Documents, including but not limited to Technical Data Sheets, Application (installation) Guides, and third-party field reviews, must not be locked or password protected; locked or password protected documents will be rejected and the application package will be labelled "Incomplete".
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>To use the forms linked below,
<ol>
<li>Download and save a blank copy to your computer or server,
<li>Reopen the file with [https://get.adobe.com/reader/ '''Adobe Acrobat'''] or another PDF reading/writing program to activate the fillable field function,
<li>Complete the form and save it, and
<li>Submit completed forms electronically to the [mailto:technical@rcabc.org '''''RoofStar Guarantee Program'''''] and indicate “New Material Acceptance application” in the Subject line.
</li></ol>
</li></ol>

====5.1.2.2. RCABC Policies====
<ol>
<li>Acceptance of materials and systems for installation in a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee''''', is governed by RCABC policies.
<li>Every Associate Member manufacturer making application for acceptance of a new waterproofing or water-shedding material or system agrees to abide by the following RCABC policies and must complete and submit RCABC Policy A-078, "Material Acceptance Agreement" (one time only, unless a signed updated version is required).
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>Every Associate or Affiliate Member manufacturer making application for acceptance of a new ''vegetated roof system'' agrees to abide by the following RCABC policies and must complete and submit Policy A-078 (one time only, unless a signed updated version is required):
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>In addition to the policies listed in Sentence (3), every Affiliate Member of the RCABC who manufactures an accepted ''vegetated roof system'' must abide by Policy A-316, "Affiliate Membership Criteria."
<li>Member copies of RCABC policies can be procured from [mailto:rkoppen@rcabc.org '''RCABC Member Services'''].
</li></ol>
</li></ol>

====5.1.2.3. Bonding====
<ol>
<li>All primary materials, and all ''vegetated roof systems'', must be covered by an annually-renewable bond procured by the RCABC Member manufacturer and presented to the '''''RGC''''' for safekeeping in the Member's records.
<li>Member bonding is covered by RCABC Policy A-080, "Material Bond"; see the bond amount requirements in RCABC Policy A-078 for Associate Members, and RCABC Policy A-316 for Affiliate Members (with respect to ''vegetated roof systems'').
<li>Bonds will be exercised only if and when an RCABC Member manufacturer defaults in their obligations under RCABC policy to respond to a claim against the manufacturer's material or system, when that material or system is part of a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

====5.1.2.4. Forms for Water-proofing and Water-shedding Systems and Materials====

<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms specifically relate to applications for acceptance of materials and systems used in waterproofing and water-shedding projects:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application):
<ol>
<li>For F-090 is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.5. Forms for Vegetated Roof Systems====
<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms pertain to applications for acceptance of ''vegetated roof systems'' and their component materials:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<ol>
<li>Form F-090 VRS is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 VRS must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.6. Applications by RCABC Manufacturers of Current Accepted Materials or Systems====
<ol>
<li>RCABC Members whose materials or systems are already accepted by the '''''RGC''''' and listed in [[Division C]] of the RPM do not need to resubmit signed policies or forms that constitute a first-time application (unless those policies have been renewed and a new commitment by the Member is required).
<li>All applications for the acceptance of water-proofing or water-shedding materials or systems must include the following forms:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application)
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
<li>All applications for the acceptance of ''vegetated roof systems'' must include the following forms:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

===5.1.3. Application Review and Acceptance===
====5.1.3.1. Product and System Samples====
<ol>
<li>At least one product sample must accompany an application for acceptance of a new material submitted for examination by the RGC Technical Committee.
<li>Samples must be submitted with an application for acceptance. Failure to supply a sample may result in the rejection of the application.
</li></ol>

====5.1.3.2. Administrative Review Process====
<ol>
<li>Applications for Material Acceptance are reviewed by the RCABC Technical Department of the '''''RoofStar Guarantee Program'''''; questions about the application process or acceptance criteria can be directed to the [mailto:guarantees@rcabc.org '''''RoofStar Guarantee Program'''''] via email, or by calling (604) 882-9734.
<li>The RCABC Technical Department occasionally processes acceptance of materials or systems under its administrative powers, for materials or systems that do not require formal review and consent by the RGC Technical Committee or the RGC Board of Directors, and administrative acceptance is granted at the discretion of the RCABC Technical Department and is subject to operational policy.
</li></ol>

====5.1.3.3. RGC Technical Committee====

<ol>
<li>Each completed application is reviewed by the RCABC Technical Department and subsequently presented to the RGC Technical Committee, which accepts or rejects the application.
<li>The RGC Technical Committee reports to the to the RGC Board of Directors and recommends acceptance or rejection of each material or assembly it reviews.
<li>The RGC Technical Committee meets three times per year to review applications for acceptance - January, May, and October. Cut-off dates for applications are published in the [https://www.rcabc.org/events/ '''''RCABC Calendar of Events'''''] on the RCABC website.
</li></ol>

====5.1.3.4. RGC Board of Directors====
<ol>
<li>Final acceptance of a material or system rests with the RGC Board of Directors, which meets several weeks after each of the RGC Technical Committee Meetings.
<li>Once a material or system has been accepted by the Board, the RCABC Technical Department lists the materials or systems in Division C of the RPM.
<li>If the applicant is a new RCABC Member, listing of accepted materials or systems will be on a new Member page in Division C.
<li>Any questions concerning the listing of materials or systems in Division C should be directed to the [mailto:technical@rcabc.org '''''RCABC Technical Department'''''].
</li></ol>

===5.1.4. Names Changes, Substitutions, and Discontinued Materials or Systems===
====5.1.4.1. General====

<ol>
<li>A change of product name, the introduction of a new product that is similar to one already accepted by the '''''RGC''''', or products that have been discontinued, all can materially affect the '''''RoofStar Guarantee Program''''', and are therefore managed by the '''''Guarantor''''' through the guidelines and procedures of this Subsection, with reference to and in support of RCABC Policy A-055, “Associate Member Commitment” and Policy A-316, “Affiliate Membership Criteria”.
</li></ol>

====5.1.4.2. Name Changes====

<ol>
<li>When a ''manufacturer'' notifies the '''''Guarantor''''' that an accepted material has been renamed, or when the '''''Guarantor''''' discovers that an accepted material has been renamed, the ''manufacturer'' must immediately support that claim with a new technical data sheet verifying that only the name has changed.
<li>A name change that is not supported by the ''manufacturer’s'' published technical literature will be deleted from result in the deletion of the product from the '''''RoofStar Guarantee Program''''' and [[Division C]] of the RPM.
</li></ol>

====5.1.4.3. Substitutions or Additions====

<ol>
<li>All applications for substitution or additions shall follow the typical process for a new material application.
<li>When an RCABC Member manufactures a material or system that replaces a material or system already accepted by the '''''RGC''''', and the replacement material or system is said to be equivalent to the old one, the RCABC Technical Department may grant the applicant permission to apply for acceptance through a shorter application process without requiring either documented marketplace experience or a formal review and acceptance by the RGC Technical Committee:
<ol>
<li>The shorter application process for the acceptance of materials is governed by RCABC Policy A-041 and is limited to materials offered by the ''manufacturer'' as
<ol>
<li>a substantially equivalent substitution for a material currently accepted for use in the '''''RoofStar Guarantee Program''''', but which has been discontinued from production by the manufacturer,
<li>an improved replacement for a material already accepted for use in the '''''RoofStar Guarantee Program''''', or
<li>an improved material substantially similar to, and intended as an addition to, a material already accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>
<li>To apply for a material substitution or addition, each RCABC Member manufacturer must (through its representative)
<ol>
<li>submit an F-090 Application form (requiring the RCABC Member manufacturer to provide a detailed explanation of the product changes or improvements) and make a declaration in the space provided, that the new material or system is substantially equivalent to the material or system it will replace or will improve upon and complement,
<li>submit the technical data sheets and other required documentation (independent test reports, if required by an RGC Acceptance Criteria specification), both for any discontinued product or system, and for newly submitted materials, and
<li>submit test data from a qualified lab/facility (where testing is required), demonstrating that the new material or system has met or exceeded specific test requirements (for example, that a sheet membrane has been tested under CSA-A123.21, or that a ''vegetated roof systems'' has been tested under CSA-A123.24).
</li></ol>
<li>Applications utilizing the shorter application process will be reviewed on an ongoing basis by the '''''Guarantor''''', and decisions presented to the RGC Technical Committee only for information purposes.
<li>Notwithstanding the foregoing, the '''''Guarantor''''' reserves the right to reject the applicant’s claims and to require an applicant to submit a full application complete with a marketplace product history.
</li></ol>
</li></ol>

====5.1.4.4. Material Discontinuance====
<ol>
<li>A ''manufacturer'' who has discontinued production or distribution of a material accepted by the '''''RGC''''' must, under the terms of RCABC Policy A-041, “Material Acceptance Criteria”, forthwith notify the '''''Guarantor''''' of that product’s discontinuance, at which time the '''''Guarantor''''' will remove it from its listing in [[Division C]] of the RPM.
</li></ol>

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Material Classification and Application for Acceptance

2026-06-22T21:02:21Z

James Klassen: /* 5.1.4.2. Name Changes */

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<big><big>Division C - Accepted Materials</big></big>
<hr>
<big><big><big><big><big><big>Material Classification and Application for Acceptance</big></big></big></big></big></big>

=Part 1 - General=
==Section 1.1. Purpose==
===1.1.1. Accepted Materials and Systems in RoofStar Guarantee Program===
====1.1.1.1. General====
The '''''RoofStar Guarantee Program''''' is comprised of five integral components, explained in [https://rpm.rcabc.org/index.php?title=Guarantee '''The RoofStar™ Guarantee Program''']:
*'''Membership'''
*'''Training'''
*'''Accepted Materials'''
*'''Guarantee Standards'''
*'''Independent Observations'''
 
''Accepted Materials'' (also referred to in this Manual as "Materials", "Accepted Products" or simply as "Products") and accepted systems (such as ''vegetated roof systems'') are critical to the integrity of the '''''The RoofStar™ Guarantee Program'''''. Not every material in the marketplace may be specified and installed in a ''project'' for which a '''''RoofStar Guarantee''''' is required – only those that are accepted by the '''''RGC''''' qualify for a '''''RoofStar Guarantee'''''.

The '''''RGC''''' accepts materials and systems. The '''''RGC''''' does not approve them, endorse them, recommend them, or promote them. They are "accepted" because they are made by RCABC Member manufacturers who support their materials and systems with a bond. Furthermore, those materials and systems conform to objective, published, accepted criteria, including acceptance criteria specifications published by the '''''RGC'''''. Consequently, acceptance of materials or systems should not be construed as an indication of the quality or performance of other materials not listed in this ''Manual''. Tables and lists in the RPM are not intended for use as a comparison of material performance or quality. It is the sole responsibility of the ''Design Authority'' to assess the performance capability and material suitability for specific design requirements.

Applications for material acceptance are received and reviewed three times per calendar year – January, May and September. Applications must be received three weeks in advance of the scheduled Technical Committee meeting, or they will be deferred to the next meeting in the rotation. See the [http://www.rcabc.org/events/ '''Events Calendar'''] for the next scheduled Technical Committee meetings.

====1.1.1.2. Qualified Applicants====
Only Members of the '''Roofing Contractors Association of British Columbia''' may apply for Material Acceptance in the '''''RoofStar™ Guarantee Program'''''. To become a member of the RCABC, visit our [http://www.rcabc.org/members/become-a-member/ '''website'''].
<hr>

=Part 2 - Roofing Materials=
==Section 2.1. Roofing Material Classification==

==={{hilite |2.1.1. Material Acceptance Criteria || 2022-June-17 }}===
The RCABC classifies accepted roofing materials (ref. Policy A-041) using three criteria, each with specific Material Application requirements: Primary materials, Secondary materials, and Accessories. Vegetated roofing is classified by system type (extensive, semi-intensive, and intensive), although each constituent material is accepted by the RGC.

====2.1.1.1. Primary Roofing Materials====
<ol>
<li>A ''primary material'' is a waterproofing or water-shedding material which that is usually exposed to the weather and is primarily responsible for protecting ''secondary materials'' and the building interior from water and weather.
<li>Membranes, metal panels, or shingles are typical materials classified as primary but the category “primary material” also includes (without limitation)
<ol>
<li>liquid membrane flashing systems,
<li>vents,
<li>r''oof drains'',
<li>plaza deck drains, and
<li>flashings that enclose penetrations and are integrated with a membrane, metal panel, or shingles.
</li></ol>
<li>An application for acceptance of a ''primary material'' must be supported by
<ol>
<li>a ''manufacturer’s'' material bond (ref. RGC Policy A-078, “Material Acceptance Agreement”, and
<li>RGC Policy A-055, “Associate Member Commitment” (also see RGC Policy A-006, “Active Member Criteria”).
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>Current Technical Data Sheet (TDS); each TDS must be dated and show the current ASTM and or CSA related required tests, including numerical values;
<li>Current application specifications;
<li>Proof of material testing, where required:
<ol>
<li>For all waterproofing roof membranes, this must include current testing using the test method, CSA-A123.21.
<li>All ''Tested Assembly'' reports must be included as a PDF with the application.
</li></ol>
<li>Verifiable marketplace installation in British Columbia, over a period of no less than a two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required);
<li>Independent inspection reports by an accepted Observation Firm and ''Observer'', confirming the performance of the material named on the "RGC Application for Material Acceptance"; and
<li>Approvals (any and all jurisdictions).
</li></ol>
<li>All ''primary materials'' must be supported by the ''manufacturer'' with a local technical representative.
</li></ol>

====2.1.1.2. Secondary Roofing Materials====

<ol>
<li>A ''secondary material'' is one which forms part of a the waterproofing or water-shedding assembly and which may affect the wind resistance characteristics of the entire assembly, but is not necessarily exposed to the weather.
<li>The term secondary material includes (without limitation)
<ol>
<li>deck overlays,
<li>roof underlayment,
<li>eave protection,
<li>insulation,
<li>insulation board overlays,
<li>joint tapes,
<li>fasteners and stress plates,
<li>adhesives, and
<li>primers.
</li></ol>
<li>The following Documentation is the minimum requirements and must accompany form F-090, “Material Acceptance Application”:
<ol>
<li>A current Technical Data Sheet (TDS),
<li>Current installation/application specifications,
<li>Material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>Verifiable marketplace installation in British Columbia, over a period of no less than two (2) years, ending at the time of application (Note: this can be supplemented by marketplace ‘experience’ in similar regions, for the same specified period of time, but BC marketplace data is required).
</li></ol>
</li></ol>

====2.1.1.3. Roofing Accessories====

<ol>
<li>A ''roof system accessory'' is a material that joins ''primary'' or ''secondary materials'' together or is connected to/with a ''primary material'' or ''secondary material'' but does not by its nature (apart from its installation) directly affect the water or wind resistance of the ''waterproofing'' or ''water-shedding assembly''.
<li>The term accessory may include (without limitation)
<ol>
<li>caulking,
<li>sealants, and
<li>mastics.
</li></ol>
<li>''Roof system accessories'' currently are not ‘accepted’ in the '''''RoofStar Guarantee Program'''''. However, ''manufacturers'' or suppliers wishing to have their accessories listed in [[Division C]] of the "RCABC Roofing Practices Manual" must, as a condition for listing, provide the RGC with
<ol>
<li>a current Technical Data Sheet (TDS),
<li>material testing, demonstrating that the product conforms to generally accepted industry standards (valid testing must be noted on the current, valid Technical Data Sheet), and
<li>current installation/application specifications.
</li></ol>
</li></ol>

==Section 2.2. Roofing Material Acceptance Criteria==
===2.2.1. General===
====2.2.1.1. Purpose====

Acceptance Criteria created by the '''''RGC''''' ('''''Guarantor''''') are intended solely to establish objective requirements for materials used in the '''''RoofStar™ Guarantee Program''''' (property of the RCABC Guarantee Corp. ('''''RGC''''')) through which the RGC issues the '''''RoofStar Guarantee''''' for ''waterproofing'' and ''water-shedding systems''.
Materials used in the construction of ''waterproofing'' or ''water-shedding systems'' must be accepted by the RGC (Refer to other resources on this page or in this Manual, as they related to acceptance criteria and the application and approval process). RGC Acceptance Criteria are made available only as part of the administrative acceptance process for the '''''RoofStar Guarantee Program''''', for products manufactured by Associate Members of the RCABC. Use of this Acceptance Criteria for any other purpose than that which is stated above shall be at the sole discretion of the user and is not endorsed or condoned by the RGC. Furthermore, this Acceptance Criteria, and the term “accepted”, shall not be construed as a measure of a material’s efficacy or its suitability for any application outside the '''''RoofStar Guarantee Program''''', nor shall it be construed to mean that the '''''Guarantor''''' endorses a product conforming to the requirements set out in this document.

RGC Acceptance Criteria provide guidelines for the material and performance characteristics to which an accepted material must conform. Acceptance is confirmed by the Guarantor through a review of the applicant’s submission and is finally endorsed by the RGC Board of Directors. Accepted materials are periodically reviewed by the '''''RGC''''' for conformity to these criteria, and acceptance may be revoked at any time should the product change so that it no longer conforms.

RGC Acceptance Criteria documents are evaluated periodically by the RGC Technical Committee, which meets throughout the year. The RGC reserves the right under policy to change Acceptance Criteria at any time, and any changes to this Acceptance Criteria shall be effective on the date shown on each Criteria document. Changes will be highlighted for a period of twelve (12) months. Previous versions of this Acceptance Criteria can be requested in writing from the '''''Guarantor'''''.

In the event that a product listed in the '''''RoofStar Guarantee Program''''' is rendered non-conforming by a change in an Acceptance Criteria, the ''manufacturer'' will have up to twelve (12) months from the date of the change to conform to the Acceptance Criteria and resubmit the material for acceptance by the RGC. Non-conforming materials will be removed from the RoofStar Guarantee Program.

The following RGC Acceptance Criteria specifications are available for download and are referenced in one or more Standards published in this ''Manual''. Submitters presenting applications to the RGC for material acceptance must use the RGC Application forms (F-090 or F-090 VRS) for Material Acceptance, available in Part 5 below.

===2.2.2. Acceptance Criteria Specifications===
====2.2.2.1. Acceptance Criteria for Roof Waterproofing System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/9/9e/Acceptance_Criteria_RGC_ACWP-MOD.pdf '''RGC ACWP-MOD'''], "RGC ACCEPTANCE CRITERIA for MANUFACTURED POLYMER-MODIFIED, REINFORCED BITUMINOUS SHEET MEMBRANES Used in Roof Waterproofing and Grade-level Waterproofing Systems"
<li>For acceptance criteria applicable to other roof membranes, refer to Article 9.2.1.1. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for EPDM Membrane Roofs, [https://rpm.rcabc.org/index.php?title=EPDM_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for TPO Membrane Roofs, [https://rpm.rcabc.org/index.php?title=TPO_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
:*RGC Standard for PVC Membrane Roofs, [https://rpm.rcabc.org/index.php?title=PVC_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_SelectionArticle 9.2.1.1.]
:*RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs, [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.]
</li></ol>

====2.2.2.2. Acceptance Criteria for Roof Water-Shedding System materials====
'''Primary Materials'''
<ol>
<li>[https://rpm.rcabc.org/images/7/73/Acceptance_Criteria_RGC_ACWS-ASH.pdf '''RGC ACWS-ASH'''], "RGC ACCEPTANCE CRITERIA for INORGANIC FIBREGLASS-REINFORCED ASPHALT SHINGLES Used in Water-shedding Systems" See also [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#9.2.1.2._Shingles_Acceptable_for_RoofStar_Guarantee Article 9.2.1.2.] in the RGC Standard for Asphalt Shingle Roofs.
<li>For acceptance criteria applicable to metal roof panels, refer to [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.1._Panel_Grade.2C_Gauge.2C_and_Fabrication Article 9.2.1.1.] and (with respect to site-formed panels by RCABC Active (Contractor) Members, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#9.2.1.2._Roll_Forming_Machines_and_Mill_Certificate Article 9.2.1.2.], in the RGC Standard for Architectural Sheet Metal (ASM) Roofs.
</li></ol>

'''Secondary Materials'''
<ol>
<li>[http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf '''RGC ACWS-PUL'''], "RGC ACCEPTANCE CRITERIA for MECHANICALLY ATTACHED POLYMERIC ROOF UNDERLAYMENTS Used in Water-shedding Systems".
<li>For acceptance criteria applicable to self-adhered membranes used as eave and valley protection, refer to Article 8.2.1.2. of the applicable Standard published in Division B of the online Roofing Practices Manual:
:*RGC Standard for Architectural Sheet Metal (ASM) Roofs, [https://rpm.rcabc.org/index.php?title=ASM_Roof_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
:*RGC Standard for Asphalt Shingle Roofs, [https://rpm.rcabc.org/index.php?title=Asphalt_Shingle_Systems_Standard#8.2.1.2._Eave_and_Valley_Protection Article 8.2.1.2.]
</li></ol>

====2.2.2.3. Acceptance Criteria for Roof Grade-level Waterproofing System materials====
:Under development

<hr>

=Part 3 - Vegetated Roof Systems=
==Section 3.1. Classification and Basis of Acceptance==
===3.1.1. Categories===
''Vegetated Roof Systems'' are classified in three broad categories: ''Extensive Systems'', ''Semi-intensive Systems'', and ''Intensive Systems''. There are no ‘hard and fast’ ways to define these, but there are principles and parameters that help the reader to understand what each category means. What is explained below is borrowed from both the “RGC Standard for Vegetated Roofs” (the Standard) and the Notes for the Standard.

====3.1.1.1. Extensive Vegetated Roof Systems====

<ol>
<li>The term ''Extensive Vegetated Roof'', "extensive green roof", and variations thereof, refers to a relatively light-weight ''green roof'' that is often inaccessible, is typically shallow (''growing media'' no deeper than 203.2 mm (8”), is comprised of limited plant diversity (often, plant species of the same genus), and requires minimal maintenance (adapted from the Standard, [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.1.4._Defined_Terms Article 1.1.1.4. Defined Terms]).
<li>When ''extensive vegetated roof systems'' are comprised of either pre-grown trays or mats, both the ''vegetated roof system manufacturer'' and the RGC jointly agree to cover the vegetation (as described on the Guarantee Certificate and in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1. of Division A]). The system manufacturer’s warranty is the primary responder to any claim for inadequate surface coverage, and for any failure of the system components.
</li></ol>

====3.1.1.2. Semi-Intensive Vegetated Roof Systems====

<ol>
<li>The term ''semi-intensive green roof'' (also referred to as "semi-intensive vegetated system", "semi-intensive assembly", or "semi-intensive") means a mid-weight, moderate height ''green roof'' that may be accessible to people, is generally of moderate depth (growing media depth ranging from 152.4 mm (6”) to 355.6 mm (14”), is typified by increased plant diversity, and requires moderate maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.3. Intensive Vegetated Roof Systems====

<ol>
<li>The term ''intensive green roof'' (Also referred to as "intensive vegetated roof system", "intensive assembly", or "intensive") means a heavier ''green roof'' that is usually accessible to people, is generally deep (growing media greater than 355.6 mm (14”)), supports a very diverse plant profile that may include trees, and requires considerable maintenance (adapted from the Standard, Article 1.1.1.4. Defined Terms).
</li></ol>

====3.1.1.4. Hybrid Vegetated Roof Systems====

<ol>
<li>Hybrid ''green roof'' systems combine a ''green roof system'' (usually ''extensive'') with water retention or detention, either captured in purpose-made materials or free-standing in a reservoir beneath the ''green roof''.
<li>Hybrid systems are permitted only on ''protected membrane roof assemblies'' and while some manufacturers offer them on ''conventionally insulated'' roofs, they must be redesigned to conform to the RGC Standard or submitted to the '''''Guarantor''''' for consideration under a written Variance.
<li>Roof membrane selection is a key point of consideration for these systems, since hydrostatic pressures may be higher than those expected on any other iteration of a ''protected roof''.
</li></ol>

====3.1.1.5. Other Systems====

<ol>
<li>The category "Other Systems" simply refers to ''green roofs'' that may be designed for purposes other than (or in addition to) their usual functions, such as stormwater management (For example, some vegetated systems are designed by the manufacturer as ballast for a photovoltaic assembly).
<li>While the '''''RGC''''' does not accept photovoltaics as a system or materials covered by a '''''RoofStar Guarantee''''', the ''vegetated roof system'' itself can be accepted and is listed in the ''Manual'' under the category heading, "Other Systems."
</li></ol>

===3.1.2. Systems and Materials===
====3.1.2.1. Systems Proprietary to Manufacturer====
<ol>
<li>''Vegetated roof systems'' must be produced, distributed, and warrantied by a ''vegetated roof system manufacturer''.
<li>A ''vegetated roof system manufacturer'' is defined in the Standard as “an Associate or Affiliate member of the RCABC who manufactures the ''vegetated roof system''”, but when the ''vegetated roof system manufacturer'' is an Affiliate member of the RCABC, the Affiliate Member must obtain and provide to the roofing ''Contractor'' (RCABC Active Member) “a formalized single source warranty agreement with a roof system ''manufacturer'' who is an Associate member of the RCABC).
<li>A ''single source warranty agreement'' “means an agreement between an RCABC Associate member and an RCABC Affiliate member, in which the Associate member permits the Affiliate member’s ''vegetated roof system'' on the Associate member’s primary roof covering without compromising coverage under the '''''RoofStar Guarantee Program'''''.
<li>A ''single source warranty agreement'' may be a standing agreement with a ''manufacturer'', or it may be project-specific.
<li>For a ''single source warranty agreement'' to be valid, the agreement must be formalized and the signed, dated document shall form part of the '''''Guarantor’s''''' records.
</li></ol>

===3.1.3. Warranties===
====3.1.3.1. Vegetated Roof System Manufacturer Warranties====
<ol>
<li>The ''vegetated roof system manufacturer’s'' warranty forms the primary basis of coverage under the '''''RoofStar Guarantee Program''''' and is required for a ''project'' intended to qualify for a '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

<hr>

=Part 4 - Labeling and Branding=
==Section 4.1. General==
===4.1.1. Product Criteria===
Product labeling impacts both RCABC membership requirements and the way in which the material application is considered for acceptance. The '''''RoofStar Guarantee Program''''' uses the criteria explained below for the evaluation and acceptance of materials.

====4.1.1.1. Branded (or Proprietary) Materials====
<ol>
<li>Branded, or "proprietary", is the term used to indicate that a product has been made by, and labeled exclusively with the name of, the ''manufacturer''.
<li>These products are packaged with the explicit identification of the ''manufacturer'', they have been tested by the ''manufacturer'', and the technical data sheet will show that the ''manufacturer'' has undertaken this Due Diligence.
<li>When a material is said to be branded, the ''manufacturer'' carries the liability for the product and, as such, the material bond attaches to any of the ''manufacturer’s'' products accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>

====4.1.1.2. Private Labeled Materials====
<ol>
<li>The term “private labeled” means a product manufactured by one company for another ''manufacturer'', distributor, or installer (the distributor or seller), and where the product packaging (and on the product itself, if the product is amenable to labeling) shows only the name of the distributor or seller.
<li>When a material is said to be private labeled, the material specifications may be substantively different from those of its ‘cousin’ product; it is the distributor or seller whose name the private labelled material carries, not the original ''manufacturer'',
<ol>
<li>who is legally liable for the product, and
<li>who is responsible for testing.
</li></ol>
<li>The technical data sheet will carry only the distributor’s or seller’s name on it, as if they had manufactured it, which means the actual ''manufacturer’s'' material bond will not attach to the product, should it fail.
<li>For private labeled materials, a new material application is required, regardless of the ''manufacturer'' or the material’s similarities to an Accepted Material. Furthermore, all bond requirements apply to the distributor or seller regardless of who manufactured the product.
</li></ol>

====4.1.1.3. Co-Branded Materials====
<ol>
<li>The term “co-branded” means products labeled both with the ''manufacturer’s'' name and with the name of a distributor/installer who wishes to use it for advertising.
<li>When a material is said to be co-branded,
<ol>
<li>the material packaging identifies the ''manufacturer'' (though perhaps not always exclusively), and
<li>the ''manufacturer'' pays for the tests and is fully liable for any product failures, which means the material bond posted by the ''manufacturer'' attaches to a co-branded product.
</li></ol>
<li>For ''manufacturers'' whose product already has acceptance in the '''''RoofStar Guarantee Program''''', no new Accepted Material application is required for an identical co-branded product.
<li>Notwithstanding the foregoing, the '''''RGC''''' reserves the right to examine the technical data of a co-branded product to verify its acceptability.
</li></ol>

<hr>

=Part 5 - Acceptance and Changes=
==Section 5.1. General==
===5.1.1. Application Process===
====5.1.1.1. General Requirements====
The '''''RGC''''' provides simplified, transparent options for applying for material and system acceptance. Every applicant must ensure that they have already completed the basic administrative forms and signed the appropriate policies.

Most applicants submit an application for acceptance of a new product – something that has not already been accepted by the '''''RGC'''''. However, accepted materials or systems sometimes undergo a name change, or they are discontinued and replaced. It may also happen that a Member has produced a new product substantially similar to one already accepted by the '''''RGC''''' and is promoted by the ''manufacturer'' as an improvement. All of these options are covered in this Part.

When is a new application required by the '''''RGC'''''? A product or system that is not replacing a material or system already accepted by the '''''RGC''''' is considered a new material or system and therefore must be submitted for acceptance by the '''''Guarantor''''' with a completed set of forms, either as a new Member (See Sub-section 4.1.3.) or as an existing RCABC Member (Sub-section 5.1.3.).

===5.1.2. All RCABC Member Manufacturers===
====5.1.2.1. General====
<ol>
<li>Applications for material acceptance will be handled on the basis of “first come, first served”, but the RGC Administration reserves the right to cap the number of applications and give priority to new material applications.
<li>Documents, including but not limited to Technical Data Sheets, Application (installation) Guides, and third-party field reviews, must not be locked or password protected; locked or password protected documents will be rejected and the application package will be labelled "Incomplete".
<li>Unsigned forms constitute an incomplete application and will be rejected by the '''''RGC'''''.
<li>To use the forms linked below,
<ol>
<li>Download and save a blank copy to your computer or server,
<li>Reopen the file with [https://get.adobe.com/reader/ '''Adobe Acrobat'''] or another PDF reading/writing program to activate the fillable field function,
<li>Complete the form and save it, and
<li>Submit completed forms electronically to the [mailto:technical@rcabc.org '''''RoofStar Guarantee Program'''''] and indicate “New Material Acceptance application” in the Subject line.
</li></ol>
</li></ol>

====5.1.2.2. RCABC Policies====
<ol>
<li>Acceptance of materials and systems for installation in a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee''''', is governed by RCABC policies.
<li>Every Associate Member manufacturer making application for acceptance of a new waterproofing or water-shedding material or system agrees to abide by the following RCABC policies and must complete and submit RCABC Policy A-078, "Material Acceptance Agreement" (one time only, unless a signed updated version is required).
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>Every Associate or Affiliate Member manufacturer making application for acceptance of a new ''vegetated roof system'' agrees to abide by the following RCABC policies and must complete and submit Policy A-078 (one time only, unless a signed updated version is required):
<ol>
<li>RCABC Policy A-041, "Material Acceptance Criteria",
<li>RCABC Policy A-078,"Material Acceptance Agreement", and
<li>RCABC Policy A-055, "Associate Member Commitment."
</li></ol>
<li>In addition to the policies listed in Sentence (3), every Affiliate Member of the RCABC who manufactures an accepted ''vegetated roof system'' must abide by Policy A-316, "Affiliate Membership Criteria."
<li>Member copies of RCABC policies can be procured from [mailto:rkoppen@rcabc.org '''RCABC Member Services'''].
</li></ol>
</li></ol>

====5.1.2.3. Bonding====
<ol>
<li>All primary materials, and all ''vegetated roof systems'', must be covered by an annually-renewable bond procured by the RCABC Member manufacturer and presented to the '''''RGC''''' for safekeeping in the Member's records.
<li>Member bonding is covered by RCABC Policy A-080, "Material Bond"; see the bond amount requirements in RCABC Policy A-078 for Associate Members, and RCABC Policy A-316 for Affiliate Members (with respect to ''vegetated roof systems'').
<li>Bonds will be exercised only if and when an RCABC Member manufacturer defaults in their obligations under RCABC policy to respond to a claim against the manufacturer's material or system, when that material or system is part of a ''project'' covered by a '''''RoofStar Guarantee''''' or '''''RoofStar Vegetated Roof Guarantee'''''.
</li></ol>

====5.1.2.4. Forms for Water-proofing and Water-shedding Systems and Materials====

<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms specifically relate to applications for acceptance of materials and systems used in waterproofing and water-shedding projects:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application):
<ol>
<li>For F-090 is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.5. Forms for Vegetated Roof Systems====
<ol>
<li>In addition to the policies listed in Article 5.1.2.2., the following forms pertain to applications for acceptance of ''vegetated roof systems'' and their component materials:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<ol>
<li>Form F-090 VRS is used to list all the materials or systems submitted for review and acceptance.
<li>Each Form F-090 VRS must be signed, dated, and fully supported by the documentation listed on the respective form; incomplete documentation may result in the rejection of an application.
</li></ol>
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

====5.1.2.6. Applications by RCABC Manufacturers of Current Accepted Materials or Systems====
<ol>
<li>RCABC Members whose materials or systems are already accepted by the '''''RGC''''' and listed in [[Division C]] of the RPM do not need to resubmit signed policies or forms that constitute a first-time application (unless those policies have been renewed and a new commitment by the Member is required).
<li>All applications for the acceptance of water-proofing or water-shedding materials or systems must include the following forms:
<ol>
<li>[http://rpm.rcabc.org/images/1/18/RGC_Application_for_Material_Acceptance.pdf '''RGC Application for Material Acceptance (Form F-090)'''] (fillable, submitted with each application)
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
<li>All applications for the acceptance of ''vegetated roof systems'' must include the following forms:
<ol>
<li>[https://rpm.rcabc.org/images/f/fa/RGC_Application_for_VRS_Material_Acceptance_%28Form_F-090_VRS%29.pdf '''RGC Application for VRS System & Material Acceptance (Form F-090 VRS)'''] NEW
<li>[http://rpm.rcabc.org/images/6/60/Product_History_%28Fillable_Template_11x17%29.pdf '''Product History (Fillable Template, 11x17)'''] (fillable, submitted with each application)
</li></ol>
</li></ol>

===5.1.3. Application Review and Acceptance===
====5.1.3.1. Product and System Samples====
<ol>
<li>At least one product sample must accompany an application for acceptance of a new material submitted for examination by the RGC Technical Committee.
<li>Samples must be submitted with an application for acceptance. Failure to supply a sample may result in the rejection of the application.
</li></ol>

====5.1.3.2. Administrative Review Process====
<ol>
<li>Applications for Material Acceptance are reviewed by the RCABC Technical Department of the '''''RoofStar Guarantee Program'''''; questions about the application process or acceptance criteria can be directed to the [mailto:guarantees@rcabc.org '''''RoofStar Guarantee Program'''''] via email, or by calling (604) 882-9734.
<li>The RCABC Technical Department occasionally processes acceptance of materials or systems under its administrative powers, for materials or systems that do not require formal review and consent by the RGC Technical Committee or the RGC Board of Directors, and administrative acceptance is granted at the discretion of the RCABC Technical Department and is subject to operational policy.
</li></ol>

====5.1.3.3. RGC Technical Committee====

<ol>
<li>Each completed application is reviewed by the RCABC Technical Department and subsequently presented to the RGC Technical Committee, which accepts or rejects the application.
<li>The RGC Technical Committee reports to the to the RGC Board of Directors and recommends acceptance or rejection of each material or assembly it reviews.
<li>The RGC Technical Committee meets three times per year to review applications for acceptance - January, May, and October. Cut-off dates for applications are published in the [https://www.rcabc.org/events/ '''''RCABC Calendar of Events'''''] on the RCABC website.
</li></ol>

====5.1.3.4. RGC Board of Directors====
<ol>
<li>Final acceptance of a material or system rests with the RGC Board of Directors, which meets several weeks after each of the RGC Technical Committee Meetings.
<li>Once a material or system has been accepted by the Board, the RCABC Technical Department lists the materials or systems in Division C of the RPM.
<li>If the applicant is a new RCABC Member, listing of accepted materials or systems will be on a new Member page in Division C.
<li>Any questions concerning the listing of materials or systems in Division C should be directed to the [mailto:technical@rcabc.org '''''RCABC Technical Department'''''].
</li></ol>

===5.1.4. Names Changes, Substitutions, and Discontinued Materials or Systems===
====5.1.4.1. General====
A change of product name, the introduction of a new product that is similar to one already accepted by the '''''RGC''''', or products that have been discontinued, all can materially affect the '''''RoofStar Guarantee Program'''''. The '''''Guarantor''''' manages those potential risks with the following guidelines and procedures, all which support RCABC Policy A-055, “Associate Member Commitment” and Policy A-316, “Affiliate Membership Criteria”.

====5.1.4.2. Name Changes====

<ol>
<li>When a ''manufacturer'' notifies the '''''Guarantor''''' that an accepted material has been renamed, or when the '''''Guarantor''''' discovers that an accepted material has been renamed, the ''manufacturer'' must immediately support that claim with a new technical data sheet verifying that only the name has changed.
<li>A name change that is not supported by the ''manufacturer’s'' published technical literature will be deleted from result in the deletion of the product from the '''''RoofStar Guarantee Program''''' and [[Division C]] of the RPM.
</li></ol>

====5.1.4.3. Substitutions or Additions====

<ol>
<li>All applications for substitution or additions shall follow the typical process for a new material application.
<li>When an RCABC Member manufactures a material or system that replaces a material or system already accepted by the '''''RGC''''', and the replacement material or system is said to be equivalent to the old one, the RCABC Technical Department may grant the applicant permission to apply for acceptance through a shorter application process without requiring either documented marketplace experience or a formal review and acceptance by the RGC Technical Committee:
<ol>
<li>The shorter application process for the acceptance of materials is governed by RCABC Policy A-041 and is limited to materials offered by the ''manufacturer'' as
<ol>
<li>a substantially equivalent substitution for a material currently accepted for use in the '''''RoofStar Guarantee Program''''', but which has been discontinued from production by the manufacturer,
<li>an improved replacement for a material already accepted for use in the '''''RoofStar Guarantee Program''''', or
<li>an improved material substantially similar to, and intended as an addition to, a material already accepted for use in the '''''RoofStar Guarantee Program'''''.
</li></ol>
<li>To apply for a material substitution or addition, each RCABC Member manufacturer must (through its representative)
<ol>
<li>submit an F-090 Application form (requiring the RCABC Member manufacturer to provide a detailed explanation of the product changes or improvements) and make a declaration in the space provided, that the new material or system is substantially equivalent to the material or system it will replace or will improve upon and complement,
<li>submit the technical data sheets and other required documentation (independent test reports, if required by an RGC Acceptance Criteria specification), both for any discontinued product or system, and for newly submitted materials, and
<li>submit test data from a qualified lab/facility (where testing is required), demonstrating that the new material or system has met or exceeded specific test requirements (for example, that a sheet membrane has been tested under CSA-A123.21, or that a ''vegetated roof systems'' has been tested under CSA-A123.24).
</li></ol>
<li>Applications utilizing the shorter application process will be reviewed on an ongoing basis by the '''''Guarantor''''', and decisions presented to the RGC Technical Committee only for information purposes.
<li>Notwithstanding the foregoing, the '''''Guarantor''''' reserves the right to reject the applicant’s claims and to require an applicant to submit a full application complete with a marketplace product history.
</li></ol>
</li></ol>

====5.1.4.4. Material Discontinuance====
<ol>
<li>A ''manufacturer'' who has discontinued production or distribution of a material accepted by the '''''RGC''''' must, under the terms of RCABC Policy A-041, “Material Acceptance Criteria”, forthwith notify the '''''Guarantor''''' of that product’s discontinuance, at which time the '''''Guarantor''''' will remove it from its listing in [[Division C]] of the RPM.
</li></ol>

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(Draft) ASM Roof Systems Standard

2026-06-22T16:50:07Z

James Klassen: /* 9.1.3.1. General Requirements */

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<big><big>Division B - Standards</big></big> 
<big>Water-shedding Roof Systems: Metals</big> 
<hr>
<big><big><big><big><big>RGC Standard for Architectural Sheet Metal (ASM) Roofs</big></big></big></big></big>
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<div class="panel-heading"><big>'''About the Standard'''</big></div>
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{{hilite | This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for Architectural Metal Roofing (Tab 8). It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''', '''''RoofStar 10-Year Guarantee''''' or '''''RoofStar 15-year Guarantee'''''. Requirements to qualify for a '''''RoofStar 15-Year Guarantee''''' are listed in each relevant Part under Section 1. All '''''RoofStar 15-Year Guarantee''''' requirements must be read together with the General Requirements for each Part in this Standard. || 2020-July-3 }}

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. {{hilite |Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.|| 2021-February-7 }}

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the {{hilite | hyperlinks embedded || 2020-July-3 }} in the body of text.

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:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Roof Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Eave, Valley, and Field Underlayment]]
|-
| [[#PART_9 | Part 9 - Roof Field (Panel Systems)]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - The Roof as a Platform]]
|-
| <hr>
|-
| [[Notes to ASM Standard | Notes to Standard]]
|-
|}

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'''First Edition''': June 14, 2018
 '''Previous Edition''': June 12, 2025
 '''Current Edition''': Adopted January 20, 2026
 
All changes to this Standard are effective <big>'''February 1, 2026'''</big>
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<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>{{hilite | ''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''|| 2027-June-11 }}.
{{strike| {{hilite |''Finished roof system surface''|| 2020-February-3 }} {{hilite | means the top surface of any ''roof system'', inclusive of ballast or ''overburden''|| 2021-February-7 }}. || 2026-June-11 }}
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>{{hilite | ''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''|| 2027-June-11 }}.
{{strike| {{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.|| 2026-June-11 }}
<li>{{hilite | ''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''. || 2023-June-16 }}
<li>{{hilite | ''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy || 2025-October-25 }}.
<li>{{hilite | ''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure|| 2027-June-11 }}.
{{strike| ''Waterproofing roof system'' means an insulated or uninsulated ''roof system'', designed and constructed on roofs using a sheet or liquid-applied membrane, to exclude water. This type of ''system'' typically is installed on roof slopes less than 1:4 (3” in 12”). || 2026-June-11 }}
<li>''Water-shedding roof system'' means an insulated or uninsulated ''roof system'', designed and constructed to shed water away from a structure, not to waterproof it. This type of ''system'' typically is installed on roof slopes greater than 1:4 (3” in 12”) but may be installed on slopes as low as 1:6 (2" in 12").
</li></ol>
</li></ol>

===={{hilite | 1.1.1.5. Reserved || 2026-February-1 }}====

===={{hilite | 1.1.1.6. Objectives || 2026-February-1 }}====

<ol>
<li>Every ''roof system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.7. Responsibility for Design || 2026-February-1 }}====

<ol>
<li>Each design of a ''roof system'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.8. Pre-Design Requirements || 2026-February-1 }}====
<ol>
<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''roof assembly''.
<li>{{hilite | When any element of a ''roof system'' for a pre-fabricated building or building assembly is or will be installed off site , the ''Design Authority'' must consult with the '''''RGC''''' directly concerning '''''RoofStar Guarantee''''' coverage and wind load design (for further reference, see || 2027-February-1 }} [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee {{hilite | Article 3.2.1.2. || 2027-January-16 }}] {{hilite | in Division A of the ''Manual'' || 2027-February-1 }}.
</li></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2026-February-1 }}====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''roof assembly'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and the roof class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''roof assembly'',
<li>the potential effects of reflected heat on the ''roof assembly'',
<li>''roof system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>{{hilite | In addition to Sentence (1), all ''projects'' shall comply with || 2024-October-20 }}
<ol>
<li>{{hilite | the ''project'' specifications and drawings, and || 2024-October-20 }}
<li>{{hilite | the ''manufacturer's'' published installation requirements || 2024-October-20 }}.
</li></ol>
</li></ol>

====1.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>{{hilite | To qualify for a '''''RoofStar 15-year Guarantee''''', each ''project'' must be designed and constructed in compliance with the requirements published in this Standard, including the following standards which are linked to their referenced Parts || 2022-February-5 }}:
<ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is mandatory ([[#2.1.2.2. RoofStar 15-Year Guarantee |Article 2.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | Only panels with a hidden clip securement system may be used to qualify for a '''''RoofStar 15-year Guarantee'''''. Flange-fastened panels are not permitted ([[#9.1.2.2. RoofStar 15-Year Guarantee |Article 9.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | All penetrations must be flashed by using the split panel detail; flexible boot flashings secured with gasketed screws are not permitted ([[#12.1.2.2. RoofStar 15-Year Guarantee |Article 12.1.2.2.]])|| 2022-February-5 }}.
<li>{{hilite | All penetration flashings that do not incorporate a settlement cap must be fitted with two storm collars separated by no more than 75 mm (3”), and each storm collar must be sealed with an untooled bead of sealant [[#12.1.2.2. RoofStar 15-Year Guarantee | Article 12.1.2.2.]]|| 2022-February-5 }}
</li></ol>
</li></ol>

===={{hilite | 1.1.2.3. Quality Control || 2026-February-1 }}====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''roof assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for projects further away than 100 km),
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

===={{hilite | 1.1.2.4. Quality Assurance || 2026-February-1 }}====
(See [[Notes to ASM Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2026-February-1 }}]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''roof system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of roofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Roof Systems====
(See [[Notes to ASM Standard#A-1.1.3.1.| Note A-1.1.3.1.]])

<ol>
<li>{{hilite | This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as || 2023-June-16 }}
<ol>
<li>{{hilite | uninsulated ''systems'' in which metal panels are secured directly to the ''roof deck'' or an overlay, and || 2023-June-16 }}
<li>{{hilite | insulated ''systems'', in which metal panels are installed above insulation and other roof system materials, and|| 2023-June-16 }} {{hilite | should be secured to the ''roof deck'' using means and methods that reduce thermal bridging (e.g., thermally non-conductive clips, girts, or bearing plates) || 2027-February-1 }}{{hilite | (See|| 2027-February-1 }}[[#7.1.3.4. Thermal Resistance and Layering |{{hilite | Article 7.1.3.4., ||2027-February-1 }}]]{{hilite |Sentence (4) and|| 2027-February-1 }}[[Notes to ASM Standard#A-1.1.3.1.|{{hilite | Note A-7.1.3.4.)|| 2027-February-1 }}]].
</li></ol>
<li>Architectural metal roofing systems accepted for use in the '''''RoofStar Guarantee Program''''' must be roll-formed hydrokinetic (water-shedding) systems commonly installed over solid roof ''decks'' or rigid insulation panels, but may also be intermittently supported when engineered to resist anticipated live loads (metal panels designed for use as structural (spanning member) systems are accepted for a '''''RoofStar Guarantee''''' only as an architectural metal panel system).
</li></ol>

===={{hilite | 1.1.3.2. Accessibility for Maintenance || 2026-February-1 }}====

<ol>
<li><div class="recommended">All roofs with a field elevation greater than 7620 mm (25’) above grade should incorporate access to the roof by stairs and a doorway, or with a properly located roof hatch.
<li>Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, in a manner consistent with worker safety regulations, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations''.
</li></ol>

===={{hilite | 1.1.3.3. || 2026-February-1 }} Snow Loads====

<ol>
<li>In this Standard, a ''high snow load area'' is considered a regional area with a ''Specified Snow Load'' higher than 3.5 kPa (See [[Notes to ASM Standard#A-1.1.3.2.| Note A-1.1.3.2.]]).
<li>Roofs subject to high snow loads must be designed with a supporting deck structure thick enough to support the anticipated live loads, within the acceptable deflection limits defined by the "British Columbia Building Code".
<li>{{hilite | In locations where moderate to heavy snow cover or high snow load conditions are possible or expected, the ''Design Authority'' should give consideration to || 2026-February-1 }} {{strike| Consideration should be given to || 2025-February-1 }}
<ol>
<li>slope,
<li>entrances and exits,
<li>penetrations,
<li>valley construction,
<li>proper intake and exit ventilation, irrespective of snow cover and drifting, and
<li>penetrations and their functionality.
</li></ol>
<li>{{strike| Roofs subject to high snow loads should be designed || 2025-February-1 }}{{hilite | Where snow fences or guards are required by the ''Design Authority'', they should be utilized only where a hazard to the public or property exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid panel distortion and damage to the ''roof system'' || 2026-February-1 }}.
{{strike| <ol>
<li>with full support for metal panels,
<li>with generous slope to shed snow from the roof surface (a slope of at least 1:1.5 (8” in 12”) is strongly recommended),
<li>to utilize a RoofStar-accepted self-adhered eave protection membrane as underlayment over the entire deck surface, regardless of slope and the requirements published elsewhere in this Standard,
<li>with widening valleys (from peak to eave),
<li>so that penetrations are located near the ridge line, and
<li>to utilize snow fences or guards (if so required by the ''Design Authority'') only where a hazard to the public exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid disfigurement and damage to the roof system.
</li></ol> || 2025-February-1 }}
</li></ol>

===={{hilite | 1.1.3.4. || 2026-February-1 }} Ventilation====

<ol>
<li>{{hilite | Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | {{hilite | While the || 2027-February-1 }} design and selection of the ventilation system is the responsibility of the ''Design Authority'',|| 2021-June-30 }} attic ventilation
<ol>
<li>{{hilite | must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, Article 9.19.1.1., "Venting")|| 2027-February-1 }},
<li>{{hilite | must should promote proper convection, drawing cool air from the lowest point in and exhausting warm air out near the ridge, and || 2027-February-1 }}
<li>{{hilite | shall be designed so that exhaust vents are located on only one side of a ridge or hip line, within 609.6 mm (24”) of a ridge, evenly spaced along the ridgeline (vents installed on opposite or adjacent sides of a roof plane, or staggered across the plane of drainage, will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Tall exhaust vents are recommended in regions where snow cover is common || 2027-February-1 }}.
<li>Attic ventilation {{hilite |may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents|| 2021-June-30 }},
<li>{{hilite | gable end vents|| 2021-June-30 }} {{hilite | (for exhaust only)|| 2027-February-1 }},
<li>{{hilite | {{strike| hip || 2026-January-16 }} {{hilite | powered or turbine exhaust || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | static {{hilite | (passive) || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | ridge {{hilite | and hip || 2027-February-1 }} vents|| 2021-June-30 }}, or
<li>{{hilite | cupolas|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"])|| 2021-June-30 }}.
<li>{{hilite | Ventilation must be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite | the slope of the roof|| 2021-June-30 }},
<li>{{hilite | the vented area|| 2021-June-30 }}, and
<li>{{hilite | the design and configuration of the roof structure|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ventilation must be provided for|| 2021-June-30 }}
<ol>
<li>{{hilite | roofs over cathedral ceilings|| 2021-June-30 }}, and
<li>{{hilite | compact insulated roof assemblies|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | {{hilite | are {{strike| acceptable and are || 2026-January-16 }} recommended for all areas with vaulted ceilings|| 2021-June-30}}|| 2027-February-1 }}, and
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Vents shall conform to the material and product requirements in || 2027-February-1 }} [[#12.2.1.4. Air Vents | {{hilite | Article 12.2.1.4.|| 2027-February-1 }}]] {{hilite |and must be selected for their ability to resist intrusion by insects, vermin, wind-driven debris, rain, or snow; leaks attributed to roof vents are not covered by a '''''RoofStar Guarantee'''''|| 2027-February-1 }}.
</li></ol>

====1.1.3.5. Hot Works====
(See [[Notes to ASM Standard#A-1.1.3.5.| Note A-1.1.3.5.]])

<ol>
<li>{{hilite | The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]) || 2021-February-7 }}.
<li>{{hilite | When the ''project'' involves Hot Work, the ''Design Authority'' must either || 2021-February-7 }}
<ol>
<li>{{hilite |pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire sensitive by the ''Contractor'' as part of the risk assessment process || 2021-February-7 }}, or
<li>{{hilite | provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project'' || 2021-February-7 }}.
</li></ol>
</li></ol>

===={{hilite | 1.1.3.6. Variances || 2021-June-30 }}====

<ol>
<li>{{hilite | When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must|| 2021-June-30 }}
<ol>
<li>{{hilite | identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned)|| 2021-June-30 }},
<li>identify the ''Contractor'' (if awarded),
<li>{{hilite | articulate the nature of the design problem|| 2021-June-30 }},
<li>{{hilite | identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")), || 2023-June-16 }}
<li>{{hilite | cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.)|| 2021-June-30 }}, and
<li>provide design drawings, photographs, and roof plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>{{hilite |Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''|| 2021-June-30 }}.
<li>{{hilite |A Variance may be unrestricted in its scope, or it may include one or more conditions, or a restriction in coverage, that will affect the design and construction of the ''project'', to accommodate the varied standard, but this is at the discretion of the '''''Guarantor'''''|| 2021-June-30 }}.
<li>{{hilite |Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm|| 2021-June-30 }}.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)

(See [[Notes to ASM Standard#A-1.1.4.| Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>
</li></ol>

====1.1.4.2. Complete Roof System Replacement====

<ol>
<li>Complete roof system replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Roof system'' replacement means the complete removal and replacement of all ''roof system'' and metal flashing materials, exclusive of the air or vapour ''control layers'', and only new replacement materials shall be installed.
<li>Subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]], the decision to reuse and repair an existing air or vapour ''control layer'' remains the responsibility of the ''Design Authority''.
<li>''Roof system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Reserved====

====1.1.4.4. Reserved====

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a ''control joint'' securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If ''project'' conditions do not allow for a curb joint, the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (See [[#1.1.3.6._Variances |Article 1.1.3.6.]]); any alternative design must
<ol>
<li>include design specifications and construction details showing a positive water cut-off that fully isolates the existing roof from the new roof, and
<li>show how the new ''roof system'' will be easily distinguishable from the existing roof system.
</li></ol>
<li>{{hilite | Repairs or renovations to an existing ''roof system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''roof system''). || 2023-June-16 }}
<li>{{hilite | Modifications or additions to a guaranteed roof are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''. || 2023-June-16 }}
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: {{hilite | Contractor Requirements || 2021-February-7 }}====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====
(See [[Notes to ASM Standard#A-1.3.3.2. | Note A-1.3.3.2.]])

<ol>
<li>{{hilite | The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of {{hilite |the ''project''||2022-February-5 }}.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible to make a permanent seal or install overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]].) || 2021-February-7 }}.
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision, manufacturing, and installation of a RoofStar-guaranteed ''Architectural Sheet Metal Roof System'' shall be undertaken only by established employees of ''Contractors'', each having obtained a valid
<ol>
<li>Architectural Sheet Metal Journeyperson Certificate of Qualification, or
<li>Sheet Metal trade ticket, together with at least five (5) years of documented experience installing and supervising the installation of ASM roofing (ref. RCABC Policy A-248).
</li></ol>
</li></ol>

====1.3.2.4. {{hilite | Contractor Submittals || 2026-February-1 }}====
(See also [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] {{strike| and [[#9.2.1.2. Roll Forming Machines and Mill Certificate | Article 9.2.1.2.]] || 2025-February-1 }})

<ol>
<li>{{strike| {{hilite | To qualify for a '''''RoofStar Guarantee''''', the ''Design Authority'' must || 2023-June-16 }} || 2022-October-28 }}{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'' sealed engineered shop drawings conforming to the requirements in || 2023-October-28 }} [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | and || 2023-October-28 }} [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>{{hilite | When tall clips are used as an alternative to EPDM pads (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]), {{hilite | the ''Contractor'' must provide the '''''Guarantor''''' with stamped, written assurance from the ''Design Authority'' that || 2024-January-31 }}
<ol>
<li>{{hilite | the clips will adequately secure and support the elevated panels, and || 2024-January-31 }}
<li>{{hilite | the panels are suitable as spanning members, and will support anticipated live loads, including loads during construction. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The ''Contractor'' is responsible for providing to the '''''Guarantor''''' a copy of the mill certificate for the sheet metal used to form metal panels and related flashings (the certificate may be provided directly, or shown to the observer who shall take a photographic record of the certificate for the '''''Guarantor''''' || 2026-February-1 }} (See [[#9.2.1.2. Roll Forming Machines and Mill Certificate | {{hilite | Article 9.2.1.2. || 2026-February-1 }}]]).
{{strike| <ol>
<li>{{hilite | document the wind resistant design on a Schedule S form (Specialty engineering; see the "British Columbia Building Code", current edition), and || 2023-June-16 }}
<li>{{hilite | submit the Scheduled S form to the '''''Guarantor''''' as part of the ''project'' record. || 2023-June-16 }}
</li></ol> || 2022-October-28 }}
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>

====1.3.3.2. Complete Roof System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.3. Partial Roof Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.4. Reserved====

====1.3.3.5. Tie-ins and Additions to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a curb joint securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of curb joints, the new roof system must be fully isolated from the existing roof system with a positive water cut-off that renders the new roof system easily distinguishable from the existing ''roof system''.
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>{{hilite | When a ''roof system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation) || 2023-June-16 }}
<ol>
<li>{{hilite | the securement of new materials || 2023-June-16 }} ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>{{hilite | deck or wall overlays || 2023-June-16 }} ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>{{hilite | continuity of air and vapour controls || 2023-June-16 }} ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>{{hilite | thermal resistance || 2023-June-16 }} ([[#Part 7 - Insulation | Part 7]],
<li>{{hilite | eaves, valleys, and underlayment || 2023-June-16 }} ([[#PART 8 - Eave, Valley, and Field Underlayment | Part 8]]),
<li>{{hilite | metal panels || 2023-June-16 }} ([[#Part 9 - Roof Field (Panel Systems) | Part 9]]),
<li>{{hilite | perimeter details || 2023-June-16 }} ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>{{hilite | drains || 2023-June-16 }} ([[#Part 11 - Drainage | Part 11]]),
<li>{{hilite | penetrations and curbs || 2023-June-16 }} ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>{{hilite | linear metal flashings || 2023-June-16 }} ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>{{hilite | Modifications to an existing ''roof system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', drains, or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated. || 2023-June-16 }}
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to ASM Standard#A-2 | Note A-2]])
<div id="DECK_CONDITION"></div>

=={{hilite | Section 2.1. Design || 2021-June-30 }}==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====
({{hilite | See '''Figure 2.1.1.2.-A''' || 2026-February-1 }})

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a roof with a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>{{hilite | ''Deck overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials|| 2021-June-30 }}.
<li>''Extreme Slope'' means a roof with a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' (roof) means a roof with a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>{{hilite | ''Sheathing'' means a rigid panel material secured directly onto framing. || 2024-January-31 }}
<li>''Steep Slope'' means a roof with a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>{{hilite | ''Supporting deck'' ("deck")|| 2021-June-30 }} {{hilite | means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'')|| 2021-June-30 }}.
<li>{{hilite | ''Wall''|| 2021-June-30 }} {{hilite | means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions")|| 2021-June-30 }}.
<li>{{hilite | ''Wall overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials|| 2021-June-30 }}.
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2026-February-1 }} {{hilite | Forming Part of Article 2.1.1.2. || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 450 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed with a minimum slope of 1:6 (2” in 12”), which may not be reduced through a written Variance {{hilite | (Note: curved or barrel-shaped roofs may be permitted under a written Variance, subject to a review by the '''''Guarantor'''''). || 2023-June-16 }}
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a roof to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
{{strike| <li>Throughout this Standard, the defined terms of [[#2.1.1.2. Defined Terms | Article 2.1.1.2.]] apply (See '''Figure 2.1.1.2.-A''' for an illustrated guide to the above definitions). || 2025-February-1 }}
<li>Roofs with designed slopes less than the stated minimums in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.3.]] (i.e., curved applications; see also [[#9.1.3.4. Curved Panel Systems | Article 9.1.3.4.]]) will be considered for a '''''RoofStar Guarantee''''' provided
<ol>
<li>the design and installation details are submitted in writing to the '''''Guarantor''''' prior to the tendering of documents, and
<li>a written Variance is issued by the '''''Guarantor''''' prior to close of tender.
</li></ol>
</li></ol>

====2.1.3.2. Roof Slope for New Construction====

<ol>
<li>Roofs with a designed slope
<ol>
<li>equal to or greater than 1:6 (2" in 12") do not require a written Variance from the '''''Guarantor''''' and must be designed to conform to the requirements in this Standard, howsoever they apply,
<li>less than 1:6 (2" in 12")
<ol>
<li>are permissible only through a written Variance from the '''''Guarantor''''',
<li>shall be designed to conform to the requirements in this Standard, and
<li>shall comply with any and all requirements or conditions stipulated in the Variance.
</li></ol>
</li></ol>
<li>When the designed slope is less than 1:4 (3" in 12"), the engineered shop drawing package must be accompanied by manufacturer’s literature confirming that this application is acceptable.
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is a requirement for a '''''RoofStar 15-year Guarantee''''' (See [[#2.1.2.2. RoofStar 15-Year Guarantee | Article 2.1.2.2.]]).|| 2022-February-5 }}
</li></ol>

====2.1.3.3. Roof Slope for Replacement Roofing====

<ol>
<li>{{hilite | The requirements in || 2023-June-16 }} [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]] {{hilite | and || 2023-June-16 }} [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] {{hilite | apply to replacement roofing. || 2023-June-16 }}
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Roofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''roof system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.1.| Note A-2.1.5.1.]])

<ol>
<li>Steel ''decks'' must be acceptable to the roof system manufacturer and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
</li></ol>

====2.1.5.2. Concrete Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Direct contact between metal roofing and concrete, light concrete, stone and mortar '''must be avoided'''.
<li>The selection of a suitable underlay, insulation, and method of attachment to a concrete ''deck'' or ''wall'' is the responsibility of the ''Design Authority''.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.3.| Note A-2.1.5.3.]])

<ol>
<li>Wood decks
<ol>
<li>must conform to the material requirements of the Code (see "British Columbia Building Code", Division B, Part 9, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s923 Article 9.23.16.2.. "Material Standards"]),
<li>shall be free of loose knots or cracks,
<li>{{hilite | shall have a moisture content acceptable to the ''manufacturer'' (for self-adhered or adhered membranes, moisture content shall not exceed 19%; Ref. Canadian Wood Council, || 2023-October-28 }} [https://cwc.ca/en/why-build-with-wood/durability/durability-hazards/moisture-and-wood/ "Moisture and Wood"]), and
<li>{{hilite |shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction || 2021-February-7 }}; specifying the structural suitability of fasteners is the responsibility of the ''Design Authority''.
</li></ol>
<li>Differential edge movements or deflection exceeding 1/360 of the span must be prevented
<ol>
<li>by constructing the ''deck'' with tongue-and-groove plywood, and supporting the non-grooved edges with joists or solid blocking, or
<li>by supporting butt joints at unsupported edges with solid blocking.
</li></ol>
<li>All wood decks shall be
<ol>
<li>at least 15.88 mm (5/8") thick, and
<li>capable of the required pull-out resistance for expected fasteners (knotholes and cracks in decks shall be considered defects and must be covered with sheet metal, mechanically fastened in place),
</li></ol>
<li>{{hilite | All mass timber or wood board ''decks'' must be covered with a properly secured, suitable overlay to || 2021-February-7 }}
<ol>
<li>ensure the integrity of the underlayment as mass timber elements contract and expand, and
<li>{{hilite | protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2021-February-7 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li>All types of wood ''decks'' should be roofed promptly after installation.
</li></ol>

====2.1.5.4. Plywood Roof Decks====

<ol>
<li>Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to ASM Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All non-ferrous (i.e. copper, zinc) metal panel roof systems must be installed over tongue-and-groove plywood decks conforming to the minimum material properties and thicknesses stated in this Article.
<li>{{hilite | All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see || 2023-June-16 }} [[#2.1.5.5. Mass Timber Roof Decks | Article 2.1.5.5.]], [[#2.1.5.6. Non-veneered Panel Roof Decks | Article 2.1.5.6.]], and [[#2.1.5.7. Wood Board Roof Decks | Article 2.1.5.7.]]) {{hilite | shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be || 2023-June-16 }}
<ol>
<li>{{hilite | at least 15.88 mm (5/8") thick, unless exceeded by the specified securement design || 2023-June-16 }} (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>{{hilite | free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place, || 2023-June-16 }}
<li>{{hilite | securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing, || 2023-June-16 }}
<li>{{hilite | properly gapped between panels, and || 2023-June-16 }}
<li>{{hilite | fully supported along all panel edges. || 2023-June-16 }}
</li></ol>
</li></ol>

====2.1.5.5. Mass Timber Roof Decks====

<ol>
<li>{{hilite | Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated timbers (Glulam), are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in || 2023-June-16 }} [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
</li></ol>

====2.1.5.6. Non-veneered Panel Roof Decks====

<ol>
<li>{{hilite | Oriented Strand Board (OSB) is not acceptable deck material for Architectural Sheet Metal panel ''roof systems'' || 2023-June-16 }}.
</li></ol>

====2.1.5.7. Wood Board Roof Decks====

<ol>
<li>Wood board ''decks''
<ol>
<li>must be overlaid with plywood in keeping with the general requirements for wood ''decks'' in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
<li>{{hilite | must be removed and replaced with new material when they are damaged or excessively cupped (excessive cupping is considered 25.4 mm (1”) or more when measured against the mid-span deflection of the ''deck''). || 2023-June-16 }}
</li></ol>
</li></ol>

==={{hilite | 2.1.6. Reserved || 2024-October-20 }}===

===2.1.7. Walls===
(See [[Notes to ASM Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====

<ol>
<li>{{hilite | ''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials|| 2021-June-30 }}.
<li>{{hilite | Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings|| 2021-June-30 }}; {{hilite | when sheathing is unsuitable, it must be overlaid with an accepted wall overlay. || 2024-January-31 }}
<li>{{hilite | ''Sheathing''{{strike| , defined as a rigid panel material secured directly onto framing, || 2023-January-26 }} is considered a wall surface for the purpose of this Standard|| 2021-June-18 }}.
<li>{{hilite | ''Wall'' surfaces {{hilite | suitable for || 2024-January-31 }} receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the|| 2021-June-18 }} ''finished system surface'' {{hilite | (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]])|| 2021-June-18 }}.
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to ASM Standard#A-2.1.8.| Note A-2.1.8.]] concerning electrical systems, fire and shock hazards, and Rule 12-022 of the Canadian Electrical Code, Part I)

====2.1.8.1. New Construction====

<ol>
<li>Electrical cables, raceways or boxes shall not be installed within a ''roof assembly'' {{hilite | ({{hilite | '''Figure 2.1.8.1.-A''' || 2026-February-1 }})|| 2021-February-7 }}.
<li>Electrical cables, raceways or boxes shall not be installed on the underside of a ''roof assembly'', unless
<ol>
<li>the ''supporting deck'' structure equals or exceeds 76.2 mm (3”) in thickness {{hilite | ({{hilite | '''Figure 2.1.8.1.-B''' || 2026-February-1 }})|| 2021-February-7 }}, or
<li>the cables, raceways or boxes are installed and supported so there is a separation of not less than 38.1 mm (1-1/2") measured between the underside of the ''roof assembly'' and the electrical installation {{hilite | ({{hilite | '''Figure 2.1.8.1.-C''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
<li>Notwithstanding either (1) and (2), cables or raceways shall be permitted to pass through a ''roof assembly'' for connection to electrical equipment installed on the roof, provided that the passage through the roof is a part of the ''roof assembly'' design.
<li>{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing|| 2021-February-7 }} {{hilite | ({{hilite | '''Figure 2.1.8.1.-D''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A''' '''Prohibited Installation of Electrical Conduit''' Forming Part of Sentence 2.1.8.1.(1)|| 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B''' '''Roof Decks and Electrical Conduit Installation''' Forming Part of Clause 2.1.8.1.(2)(1) || 2026-February-1 }}(Click to expand)
|-
| [[File:Figure 2.1.8.1.-A (Electrical).jpg | link=https://rpm.rcabc.org/images/f/f5/Figure_2.1.8.1.-A_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-B (Electrical).jpg | link=https://rpm.rcabc.org/images/3/32/Figure_2.1.8.1.-B_%28Electrical%29.jpg | 350 px]]
|}
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-C''' '''Minimum Separation Between Roof Assembly and Electrical Conduit''' Forming Part of Clause 2.1.8.1.(2)(2) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D''' '''Electrical Conduit Elevated Above Roof Assembly''' Forming Part of Sentence 2.1.8.1.(4) || 2026-February-1 }} (Click to expand)
|-
| [[File:Figure 2.1.8.1.-C (Electrical).jpg | link=https://rpm.rcabc.org/images/d/db/Figure_2.1.8.1.-C_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-D (Electrical).jpg | link=https://rpm.rcabc.org/images/e/ef/Figure_2.1.8.1.-D_%28Electrical%29.jpg | 350 px]]
|}

<div class="col-md-12">
 
</div>

====2.1.8.2. Roof Replacement and Alterations====

<ol>
<li>If existing electrical cables or boxes do not conform to the requirements in [[#2.1.8.1. New Construction | Article 2.1.8.1.]], the ''Design Authority'' must consider the attachment of the ''roof system'' above the electrical system, and the requirements set out in [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]].
<li>The ''Design Authority'' should
<ol>
<li>specify protection of existing electrical cables and boxes (a 4.76 mm (3/16”) steel plate may be used to minimize the possibility of fastener penetration and cutter damage, {{hilite | but protection plates may interfere with mechanical fasteners used to secure the ''roof system'' against wind uplift, even for future replacement roofing)|| 2021-February-7 }}, and
<li>provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes.
</li></ol>
</li></ol>

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) {{hilite | (These panels are specifically {{hilite | designed to receive roof membranes|| 2021-June-30 }} and may be installed horizontally or vertically)|| 2021-June-30 }}.
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), or
<li>{{hilite | plywood, having a minimum thickness of 12.7 mm (1/2”)|| 2021-June-30 }}.
</li></ol>
<li>Where wall sheathing is unsuitable to receive roofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be constructed with a minimum slope of 1:6 (2” in 12”).
</li></ol>
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of deck and wall structures, and their suitability for the application of roofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Roof Assembly=
==Section 3.1. Design==
===3.1.1. General===
===={{hilite | 3.1.1.1. Scope || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>This Part applies to all new roofs, and to both full and partial replacement ''roof systems''.
<li>This Part sets out the requirements for
<ol>
<li>roofs that support ''overburden'', or fixed amenities and equipment, and
<li>roofs where only part of the ''system'' must be replaced.
</li></ol>
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.2. | Note A-3.1.1.2.]])

<ol>
<li>The requirements in this Part intend to support and conform to or exceed the Building Code.
</li></ol>

===={{hilite | 3.1.1.3. Limit of Liability under RoofStar Guarantee || 2023-June-16 }}====

<ol>
<li>{{hilite |Notwithstanding [[#3.1.1.2. Intent | Article 3.1.1.2.]], the materials presented herein are based on an interpretation of the Code and are not the Code itself; therefore, the reader is responsible to exercise good judgement, and to read, understand and comply with the Code, as and how it applies to the reader’s particular ''project'' and its design requirements.
<li>Where the Code can be shown to exceed the requirements, guiding principles, and recommendations of this Part or any related Part in this Standard, the Code shall prevail|| 2021-October-30 }}.
<li>{{hilite |Compliance with this Part or the Code does not guarantee that a roof will not succumb to forces exerted by wind, and therefore neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, a roof system caused by wind; too many variables beyond the control of this Standard affect the wind resistance performance of a ''roof system'', including (without limitation)|| 2021-October-30 }}
<ol>
<li>{{hilite | the ''continuity'' or discontinuity of air and vapour ''control layers'' of the entire building enclosure|| 2021-October-30 }},
<li>{{hilite | openings in the building (windows and doors, which are often occupant-controlled and not static)|| 2021-October-30 }}, and
<li>{{hilite | wind strength, which may exceed the codified numeric wind speed values used to calculate wind resistance for the ''roof system'' || 2021-October-30 }} (Ref. "British Columbia Building Code 2024", Division B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=762 Appendix C, "Table C-1"]).
</li></ol>
</li></ol>

===={{hilite | 3.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }} || 2023-June-16 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Registered Professional'' has the same meaning as that used in the "British Columbia Building Code 2024", Division C, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"].
<li>''Specified Wind Load'' means the calculated force of wind exerted on the roof of a specific building, according to the requirements in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=496 Section 4.1., "Structural Loads and Procedures"].
</li></ol>
</li></ol>

===3.1.2. Guarantee Term Requirements===
====3.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===3.1.3. All Systems===
===={{hilite | 3.1.3.1. Responsibility for Design || 2023-June-16 }}====

<ol>
<li>The ''Design Authority'' is responsible for determining ''Specified Wind Loads'' for each ''roof system'' and each roof area of a ''project'', including roofs that support ''Vegetated Roof Systems'' or any other ''overburden'', amenities, or equipment.
<li>Acceptance of a roof for a '''''RoofStar Guarantee''''' is predicated on the assumption that the ''Design Authority'' has performed Due Diligence with respect to ''Specified Wind Loads'' and has provided the ''Contractor'' with sufficient information to construct a ''roof system'' that complies with the Code.
</li></ol>

===={{hilite | 3.1.3.2. Calculation of Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
<ol>
<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
<li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to ASM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
</li></ol>
<li>Each roof area, at each level (elevation), shall be divided into three principal roof zones ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}), and the ''Design Authority'' shall be responsible for calculating the ''Specified Wind Loads'' for each zone (Ref. the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=535 Article 4.1.7.6., "External Pressure Coefficients for Low Buildings"]).
<li>Roof zones are defined in this Standard as follows:
<ol>
<li>'''Field (F)''' – the interior of the roof bounded by the ''Edge'' and the ''Corners''.
<li>'''Edge (E)''' – the perimeter zone (minus the corners), measured as either 10% of the smallest building width ("least horizontal dimension"), or 40% of the building height, whichever is less. Notwithstanding the requirements in the "British Columbia Building Code", the ''Edge'' zone shall not be less than 2.0 m (7').
<li>'''Corner (C)''' – part of the perimeter but not less than 2.0 m x 2.0 m (7’ x7’) in size, the ''Corner'' area is defined by the ''Edge'' in both directions at the corners. Where the roof geometry includes an inside corner, the ''corner'' zone dimensions shall be the same as those for an outside corner, applied equidistant in each direction from the inside corner ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}).
</li></ol>
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.1.-A Water-shedding Systems 2.jpg|link=https://rpm.rcabc.org/images/c/c7/Figure_3.1.-A_Water-shedding_Systems_2.jpg | 500 px]]
|}
 
<li>A roof area that is divided into smaller segments by means of ''control joints'' (roof dividers, i.e., a fire wall) or ''expansion joints'', shall be considered one roof area for the purpose of calculating the ''Specified Wind Loads'', unless the height of a ''control joint'' or ''expansion joint'' exceeds 1 m (39"), in which case the ''Specified Wind Loads'' for each roof segment shall be calculated separately (See {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When a building is designed with multiple roof levels (at different elevations), and the roofs are adjacent each other (having a common wall), the ''Specified Wind Loads'' for each level, and for each roof area on that level, shall be calculated separately from loads for the adjacent level, unless the elevation difference between adjacent roof levels is less than 1.524 m (5’).
<li>When the shape of a single-level roof varies in width or length, the smallest width dimensions shall be used in the calculation of ''Specified Wind Loads'' (Ref. “minimum effective width” as defined in the "British Columbia Building Code", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=530 Article 4.1.7.2., "Classification of Buildings"]).
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Divided by a Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(4) || 2026-February-1 }} (Click to expand illustration)
|-
| colspan="1"; style="text-align:center;width:450px;" | [[File:Figure 3.1.-B Water-shedding Systems.jpg|link=https://rpm.rcabc.org/images/8/8e/Figure_3.1.-B_Water-shedding_Systems.jpg | 500 px]]
|}
 
<li>When a roof area intersects the corner of a wall, the ''Edge'' zone on either side of the wall corner must be treated as a roof ''Corner'' (2 x C) {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When an existing roof system is specified for partial replacement, the ''Design Authority'' must
<ol>
<li>calculate the ''Specified Wind Loads'' for the roof,
<li>determine if securement of the remaining roof components (left in situ) is sufficient to resist the ''Specified Wind Loads'',
<li>determine a suitable method of securement or have the ''system'' of securement engineered, and
<li>calculate and design securement for any structures or equipment.
</ol></li>
<li>''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement (See also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., "Electrical Cables and Boxes"]]).
<li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
<li>Securement of an adjoining ''waterproofing system'' shall be made in accordance with the requirements in the applicable Standard.
</li></ol>
</li></ol>

===={{hilite | 3.1.3.3. Resistance to Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>The wind uplift resistance capabilities of the selected ''roof system'' must equal or exceed the ''Specified Wind Loads'' calculated for each roof zone to which the ''system'' will be applied (see [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]]).
<li>Engineered designs to resist wind uplift may refer to the "British Columbia Building Code", Div. B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=764 Appendix C, "Table C-2"], which lists various types of loads, including wind loads, for specific reference locations throughout the province.
<li>Each engineered design must include, without limitation, the following:
<ol>
<li>Metal panel profile and gauge
<li>Type of clips
<li>Bearing plates
<li>Drag load components
<li>Fasteners (type, size and spacing)
<li>Roof assembly components (i.e. underlayment, insulation)
<li>Deck Substrate
</li></ol>
</li></ol>

===={{hilite | 3.1.3.4. Resistance to Other Loads || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.3.4. | Note A-3.1.3.4.]])

<ol>
<li>In addition to its capacity to resist ''Specified Wind Loads'', the ''roof system'' must be capable of resisting or accommodating
<ol>
<li>all anticipated live and dead loads, including (without limitation) other environmental loads, such as rain and snow, expected for the building’s size and location,
<li>gravity ("drag") loads,
<li>loads from ''overburden'' (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
</li></ol>

====3.1.3.5. {{hilite | Reserved || 2026-February-1 }}====

===3.1.4. Insulated Roof Systems===
===={{hilite | 3.1.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>New and fully replaced ''insulated systems'' shall satisfy the requirements of the "British Columbia Building Code" and this Part, and shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.1.5. Uninsulated Roof Systems===
===={{hilite | 3.1.5.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be designed for securement directly to the ''roof deck''.
</li></ol>

===3.1.6. Reserved===

===3.1.7. Roof Replacement and Alterations===
===={{hilite | 3.1.7.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads'' and must follow the design requirements specified by the ''Design Authority''.
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===
===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The ''Design Authority'' should specify the correct type of fastener, keeping in mind
<ol>
<li>pull-out strength, and
<li>corrosion resistance (contributing factors to fastener corrosion may include dissimilar metal contact, excessive building humidity, corrosive chemicals within components of the ''roof system'', or corrosive elements provided within the building envelope etc.).
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Fasteners
<ol>
<li>used to secure metal panels or clips shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and
<li>used to secure linear metal flashings shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>
</li></ol>

==Section 3.3. Application==
===3.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''',
</li></ol>

===3.3.2. All Systems===
====3.3.2.1. Securing Systems with Mechanical Fasteners====
({{hilite | See '''Figure 3.3.2.1.-A''' || 2021-October-30 }})

<ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}
<ol>
<li>{{hilite | be secured to a firm support, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>Concealed fasteners should provide clearance for the underside of the metal panel and must be of a material compatible with the panel or metal clip.
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}

===3.3.3. Insulated Roof Systems===
===={{hilite | 3.3.3.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Insulated systems'' shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.3.4. Uninsulated Roof Systems===
===={{hilite | 3.3.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be secured with clips fastened to the ''roof deck'', in keeping with the engineered design requirements (Ref. [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]) and conforming to the material requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]
</li></ol>

===3.3.5. Reserved===
===3.3.6. Roof Replacement and Alterations===
===={{hilite | 3.3.6.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>''Roof systems'' that are removed and replaced in their entirety (excluding the air or vapour controls, which may be left in place at the discretion of the ''Design Authority'') must be secured following the requirements for new ''roof systems''.
</li></ol>

===={{hilite | 3.3.6.2. Partial Roof Replacement || 2023-June-16 }}====

<ol>
<li>When only a portion of an existing ''roof system'' is specified for replacement, the new materials must be secured to resist wind ''Specified Wind Loads'', following the design specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'' means a material used in a roof or grade-level waterproofing ''system'' that protects a building interior from water. ''Primary materials'' are often exposed to the weather (protected membranes are an exception), and therefore also protect ''secondary materials'' from damage. Membranes, metal panels, asphalt shingles, and cedar shakes and shingles, form the core body of materials classified as ''primary''.
<li>''Secondary Material'' means one which forms part of a ''waterproofing system'' or ''water-shedding system'', and which may affect the wind resistance characteristics of the entire ''assembly'' but is not necessarily exposed to the weather.
</li></ol>
</li></ol>

===4.1.2. Reserved===
===4.1.3. Reserved===

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the ''manufacturer'' of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>{{hilite | validated with a packing slip, retained in their original packaging, or their packaging must be retained on site, and made available to the observer for verification and documentation || 2026-February-1 }},
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the roof surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''roof system'' shall conform to the ''manufacturer's'' published requirements, unless stated otherwise in this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to ASM Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to ASM Standard#A-5.1.3.1.| Note A-5.1.3.1.]])

<ol>
<li>A deck or wall overlay must be specified
<ol>
<li>when a thermal layer is required by the Building Code, or
<li>when the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li>''Uninsulated systems'' designed for a steel deck require a ''deck overlay'' to support the underlayment.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>Deck and wall overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>{{hilite | suitable for the type of ''deck'' || 2023-October-28 }}, and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
<li>When plywood is used as a deck overlay, only tongue-and-groove plywood is acceptable and must be
<ol>
<li>at least 12.7 mm (1/2”) thick when installed over a mass timber deck, or
<li>at least 15.88 mm (5/8”) thick, when the roof supports overburden.
</li></ol>
</li></ol>

====5.2.1.2. Thermal Barrier====

<ol>
<li>When the Code having jurisdiction requires a thermal barrier, any material selected from [[Division_C | Division C]] must be suitable for the purpose.
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU), or
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), conforming to ASTM C1325 (latest edition), "Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units".
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Panel Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.3.2. All Systems===
====5.3.2.1. Support, Arrangement, and Securement of Deck Overlays====

<ol>
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>''Deck'' overlays shall be affixed to the ''deck'' with
<ol>
<li>mechanical fasteners conforming to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]],
<li>polyurethane foam adhesives acceptable to the ''manufacturer'' and conforming to the requirements in [[#3.2.2.2. Adhesives | Article 3.2.2.2.]], or
<li>a combination of mechanical fasteners and polyurethane foam adhesives.
</li></ol>
<li>When mechanical fasteners are used to secure deck overlays, the minimum number of fasteners (in combination with plates) shall be four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel ''deck'' panels must be overlaid with a suitable substrate to provide a smooth, uniform surface for roofing.
<li>RoofStar-accepted ''deck'' overlay boards used as a thermal barrier to achieve a specific fire rating must conform to the applicable code and insurance requirements for the ''roof system''.
<li>When the ''roof system'' is uninsulated, the ''deck'' must be overlaid with at least one 12.7 mm (1/2”) thick layer of
<ol>
<li>moisture resistant gypsum core ''deck'' overlay board, or
<li>plywood.
</li></ol>
</li></ol>

====5.3.2.3. Overlays on Concrete Decks====

<ol>
<li>While metal panels must be separated from a concrete ''deck'' to prevent corrosion, a ''deck overlay'' is not mandatory, and separation may be made with an underlayment.
</li></ol>

====5.3.2.4. Overlays on Wood Decks====

<ol>
<li>A mechanically fastened overlay board is required for any ''deck'' structure that does not meet the ''deck'' fastening criteria set out in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]].
</li></ol>

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>''Wall'' overlay panels must be
<ol>
<li>mechanically fastened with screw fasteners spaced no more than 304.8 mm (12”) O.C., both vertically and horizontally; fasteners must align with structural supports, and shall be placed
<ol>
<li>at the perimeters,
<li>at the corners, and
<li>in the field, or
</li></ol>
<li>adhered with a polyurethane adhesive, applied with a continuous z-patterned ribbon spaced no less than 304.8 mm (12”) apart.
</li></ol>
</li></ol>
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to ASM Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to ASM Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. {{hilite | Additionally, the following terms are used in this Part || 2024-June-15 }}:
<ol>
<li>{{hilite | ''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material || 2024-June-15 }}.
<li>{{hilite | ''Continuity'' means a sealed, resistive, continuous connection || 2024-June-15 }}
<ol>
<li>{{hilite | between ''control layers'' that have the same function, and || 2024-June-15 }}
<li>{{hilite | between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration) || 2024-June-15 }}.
</li></ol>
<li>{{hilite | ''Control layer'' means a material used in a ''roof assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly || 2024-June-15 }}.
<li>{{hilite | ''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material || 2024-June-15 }}.
<li>{{hilite | ''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material, and is usually used in wall assemblies || 2024-June-15 }}.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible to specify
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''roof system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to ASM Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''roof system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity {{hilite | of Control Layers || 2024-June-15 }} {{strike| Between Building Enclosure Systems || 2023-June-15 }}====

<ol>
<li>The ''Design Authority'', and trades constructing walls and roofs, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between ''wall systems'' and ''roof systems''.
<li>{{hilite | Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor'' || 2024-June-15 }}.
<li>{{hilite | ''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials ({{hilite |some air ''control layers'' are considered vapour permeable, others vapour-impermeable || 2020-October-22 }}); ''roof systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>{{hilite | All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B, || 2024-June-15 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. High-humidity Building Interiors====

<ol>
<li>Careful consideration should be given to the performance characteristics of air and vapour ''control layers'' when specifying such a membrane for ''roof systems'' constructed over high-humidity building interiors, which may be susceptible to the accumulation of moisture within the ''roof system'' unless effective air and vapour controls are installed; these building interiors include (but are not limited to)
<ol>
<li>swimming pools,
<li>commercial laundry facilities,
<li>large aquariums, and
<li>paper mills.
</li></ol>
</li></ol>

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the roof or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to ASM Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a roof designed and built to qualify for a '''''RoofStar Guarantee''''' shall not include
<ol>
<li>polyethylene sheet plastic, or
<li>bitumen-impregnated kraft paper.
</li></ol>
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick {{hilite | self-adhering bituminous or butyl-based membrane || 2026-February-1 }} is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>{{hilite | Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard|| 2020-July-3 }}.
<li>{{hilite | A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited|| 2020-July-3 }}.
</li></ol>

====6.2.1.5. Vapour Controls for Concrete Decks====

<ol>
<li>Because curing concrete releases considerable moisture that can compromise the performance of a ''roof system'', a vapour ''control layer'' installed on new concrete ''decks'' (28 days or older) must be selected to prevent condensation inside the ''roof system''.
<li>A membrane with a permeability of 0.01 perms (Class I) is recommended for applications on concrete substrates, but the selection of vapour control materials is nevertheless the responsibility of the ''Design Authority''.
</li></ol>

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' in the ''roof system'' field, and at perimeters, are installed to provide at least 101.6 mm (4”) of overlap, for continuity of matching layers in adjacent assemblies,
<li>{{hilite | ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', || 2023-June-16 }} and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., walls), when a roof is replaced.
</li></ol>
<li>Installation of all air and vapour control materials must be {{hilite | smooth and uniform, without wrinkles or fish-mouths|| 2020-July-3 }}, and must {{hilite | also|| 2020-July-3 }} conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>{{hilite | When self-adhered membranes are applied directly to a steel supporting ''deck'',|| 2021-February-7 }}
<ol>
<li>{{hilite | membranes should be oriented parallel to the direction of ''deck'' flutes|| 2021-February-7 }}, and
<li>{{hilite | membrane laps and changes in plane must be supported by deck flutes, or by flat metal supports secured to the deck to span gaps|| 2021-February-7 }}.
</ol></li>
<li>When metal supports are used to span gaps between steel deck flutes, they must be
<ol>
<li>{{hilite | fabricated from pre-finished steel with a thickness no less than 24-gauge|| 2021-February-7 }}, and
<li>{{hilite | secured to the ''deck'' with no fewer than two (2) compatible screw fasteners per flute|| 2021-February-7 }} ({{hilite | See {{hilite | '''Figure 6.3.2.1.-A''' || 2026-February-1 }} and {{hilite | '''Figure 6.3.2.1.-B''' || 2026-February-1 }}|| 2021-February-7 }}).
</ol></li>
<li>{{hilite | ''Roof drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity'' || 2024-June-15 }}.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck With Metal Support''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck With Deck Overlay Panel''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }}
|-
| [[File:Figure 6.3.1-1.jpg | link=https://rpm.rcabc.org/images/5/54/Figure_6.3.1-1.jpg | 350 px]] || [[File:Figure 6.3.1-2.jpg | link=https://rpm.rcabc.org/images/d/d0/Figure_6.3.1-2.jpg | 350 px]]
|}

====6.3.2.2. Torch-applied Materials====

<ol>
<li>{{hilite | The application of materials to an unprotected combustible material, using a torch, is strictly prohibited|| 2020-July-3 }}.
<li>{{hilite | All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials|| 2020-July-3 }}
<ol>
<li>{{hilite | on ''decks'', ''walls'', blocking, and canted edges|| 2020-July-3 }}, and
<li>{{hilite | that are hidden or obscured within voids, cracks, or orifices|| 2020-July-3 }}.
</li></ol>
<li>{{hilite | When a torch-applied membrane is specified over combustible materials, all joints between overlay panels, and at roof-wall transitions, must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes|| 2020-July-3 }}.
<li>{{hilite | Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]|| 2020-July-3 }}.
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====
<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including {{hilite | heat from|| 2021-June-30 }} liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate and mineral wool. Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral wool insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to ASM Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements, with respect to
<ol>
<li>the use of a thermal barrier between the ''roof deck'' and the insulation ''system'', and
<li>the minimum required thermal resistance of the insulation ''system''.
</li></ol>
</li></ol>

====7.1.3.2. General Requirements====
(See [[Notes to ASM Standard#A-7.1.3.2. | Note A-7.1.3.2.]])

<ol>
<li>{{hilite | Selected board insulation products may be used within an architectural sheet metal panel ''roof systems'', provided the panels are listed in || 2023-June-16 }} [[Division_C | Division C]], {{hilite | and conform to the material specifications in || 2023-June-16 }} [[#Section 7.2. Materials | Section 7.2.]]
<li>{{hilite | Insulation may be used below the ''roof deck'' (not part of the ''roof assembly''), provided a ventilation space no less than 63.5 mm (2-1/2"), measured between the underside of the ''roof deck'' and the top face of insulation, is retained beneath the ''deck'' to keep it cool (Ref. the "British Columbia Building Code", Division B, || 2023-June-16 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.1., "Required venting"], and [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]).
<li>{{hilite | Spray foam insulation may not be used directly beneath a wood ''roof deck'' that supports an architectural sheet metal panel ''roof system'', unless the ''manufacturer'', and the '''''Guarantor''''', jointly agree in writing that moisture in the ''roof deck'' can be adequately vented out of the ''roof assembly''. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>{{hilite | Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee'''''), provided || 2023-June-16 }}
<ol>
<li>{{hilite | the ''Design Authority'' has specified its reuse, and || 2023-June-16 }}
<li>{{hilite | the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
(See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>Insulation ''assemblies'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See {{hilite | '''Figure 7.1.3.4.-A'''|| 2026-February-1 }}).
<li>{{hilite | At intersections with insulated curbs and walls, insulation joints at the roof-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See {{hilite | '''Figure 7.3.2.2.-A)'''|| 2026-February-1 }}. || 2023-June-16 }}
<li>{{hilite | ''Insulated systems'' || 2027-February-1 }}{{strike| that utilize metal panel clips shall specify clip attachment|| 2026-January-31 }} {{hilite | should utilize methods of panel clip attachment that minimize thermal bridging and the potential for condensation (See || 2027-February-1 }}[[Notes to ASM Standard#A-7.1.3.4.(4)| {{hilite | Note A-7.1.3.4.(4))|| 2026-February-1 }}]]{{hilite |, including the use of || 2027-February-1 }}
<ol>
<li>{{hilite | mechanically fastened bearing plates which are installed on the top surface of the insulation layers|| 2027-February-1 }}, {{strike| to thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or || 2026-January-31 }}
<li>{{hilite | metal girts placed in the top layer of insulation, secured to the deck with screws penetrating lower layers of insulation|| 2027-February-1 }}, or
<li>{{hilite | thermally non-conductive intermediate or continuous supports that pass through the insulation ''assembly''|| 2027-February-1 }}. {{strike| to mechanically fastened bearing plates which are installed on the top surface of the insulation.|| 2026-January-31 }}
</li></ol>
<li>{{hilite | Where spray foam is specified for use in the roof system, it shall conform to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2027-February-1 }}]] {{hilite |(Also, see Sentence (4), || 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.) || 2027-February-1 }}]].
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Insulated Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.4.1. Reuse of Insulation for Panel Replacement====

<ol>
<li>{{hilite | When a roof is specified for panel replacement only, the existing insulation may be left in place (Subject to the requirements in || 2023-June-16 }} [[#1.1.4.3. Partial Roof Replacement | Article 1.1.4.3.]]), {{hilite | but will be excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
</li></ol>

====7.1.4.2. Protection of Heat-sensitive Insulation====

<ol>
<li>When ''heat-sensitive insulation'' is used in the primary thermal ''assembly'', it must be covered with a ''heat-resistant insulation'' at least 50.8 mm (2”) thick (See [[Notes to ASM Standard#A-7.1.4.2. | Note A-7.1.4.2.]]).
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>The maximum width and length of insulation boards installed with mechanical fasteners is limited only by the ''manufacturer''.
<li>{{hilite | While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''roof system'' from a material handling perspective and consider specifying a thicker panel|| 2021-June-30 }}.
</li></ol>
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.2. Expanded Polystyrene Insulation====

<ol>
<li>Expanded polystyrene ("EPS") is ''heat-sensitive'' and shall conform to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.3. Polyisocyanurate Insulation====
(See [[Notes to ASM Standard#A-7.2.2.3. | Note A-7.2.2.3.]])

<ol>
<li>Polyisocyanurate insulation ("Polyiso") is ''heat-resistant'' and
<ol>
<li>shall conform to CAN/ULC-S704, "Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced", and to ASTM C-1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board",
<li>shall be manufactured with non-organic facers, and
<li>shall be labeled to identify the manufacturer and the date of manufacture.
</li></ol>
</li></ol>

====7.2.2.4. Mineral Fibre Insulation====

<ol>
<li>Mineral fibre insulation ("Mineral wool") is ''heat-resistant'' and shall conform to ASTM C726-17, "Standard Specification for Mineral Wool Roof Insulation Board".
</li></ol>

===={{hilite | 7.2.2.5. Spray Foam Insulation || 2027-February-1 }}====
<ol>
<li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2027-February-1 }}.
<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling minor gaps {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
<li>must be offset at least 304.8 mm (12"), both for adjacent layers and for adjacent row (a minus offset tolerance of 50.8 mm (2") maximum is permissible; see '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2026-February-1 }} {{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.3 Insulation Offset and Staggered.jpg|link=http://rpm.rcabc.org/images/2/28/7.3_Insulation_Offset_and_Staggered.jpg | 500 px]]
|}
 
<li>{{hilite | On exterior insulated walls, insulation joints at the roof-wall interface must be offset and staggered to eliminate thermal bridging|| 2022-February-5 }} ({{hilite | See {{hilite | '''Figure 7.3.2.2.-B''' || 2026-February-1 }}|| 2022-February-5 }}).
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.3.2.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-B (ASM).jpg| link=https://rpm.rcabc.org/images/7/7e/Figure_7.3.2.-B_%28ASM%29.jpg | 500 px]]
|}
 
<li>{{hilite | Where penetrations pass through an insulation system, or where thermally non-conductive intermediate or continuous supports for clips are used, any minor voids less than 25.4 mm (1”) around them must be insulated with a spray foam conforming to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5.|| 2027-February-1 }}]]{{hilite |, to reduce the potential for condensation || 2027-February-1 }}.
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''roof assembly'', calculated to resist the ''Specified Wind Loads'' for the ''roof system''.
<li>{{hilite | When thermally non-conductive clips or bars are utilized on a ''low slope'' roof to retain insulation and support panel clips, they must be embedded in, and fastened through, a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7.]])|| 2021-June-30 }}.
</li></ol>

====7.3.2.4. Protection of Heat-sensitive Insulation====

<ol>
<li>{{hilite | Heat-sensitive insulation must be protected from high temperatures, both during construction and when placed in service, and therefore it must be overlaid with heat-resistant insulation no less than 50.8 mm (2") thick || 2023-June-16 }} (See [[#7.1.4.2. Protection of Heat-sensitive Insulation | Article 7.1.4.2.]]).
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Eave, Valley, and Field Underlayment=
==Section 8.1. Design==

===8.1.1. General===
====8.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====8.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Eave and Valley Protection'' means a self-adhering sheet membrane applied in valleys and in parallel courses {{hilite | on the roof ''deck''|| 2021-June-30 }} along the eaves, up the roof slope to a point measured vertically from the inside of the exterior wall, and intended to block the ingress of water that may leak behind shingles or metal roof panels as the result of snow or ice buildup on the roof surface.
<li>{{hilite | ''Separation Layer'' (sometimes referred to as a "slip sheet") means a roll material installed directly below metal roof panels to|| 2021-June-30 }}
<ol>
<li>{{hilite | inhibit bonding of the metal panels to underlying materials, such as bitumen-based underlayments or ''eave protection'' membranes, or|| 2021-June-30}}
<li>{{hilite | permit the passage of vapour out of the roof system|| 2021-June-30 }} ({{hilite | A ''separation layer'' by itself does not function as a ''ventilation layer''|| 2021-June-30 }}).
</li></ol>
<li>''Underlayment'' means a sheet (rolled) material that is either self-adhering or mechanically fastened (typically with large head nails), and which is installed
<ol>
<li>{{hilite | immediately over the supporting ''deck'' or ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | to provide secondary protection between the ''water-shedding system'' materials and the building interior|| 2021-June-30 }}, and
<li>{{hilite | to keep ''water-shedding system'' materials from adhering to the ''deck''.|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | ''Ventilation Layer''|| 2021-June-30 }} means a layer of roll material, usually comprised of stiff, synthetic entangled mesh, installed directly beneath the metal panels in place of, or in addition to, a ''separation layer''; it forms a ventilation space intended to
<ol>
<li>facilitate the {{hilite | drying|| 2021-June-30 }} of condensation that collects on the bottom surface of metal roof panels, and
<li>inhibit bonding of metal roof panels with underlying materials.
</li></ol>
</li></ol>
</li></ol>

===8.1.2. Guarantee Term Requirements===
====8.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.1.3. All Systems===
====8.1.3.1. Eave Protection====

<ol>
<li>{{hilite | Sheet membrane ''eave protection'' is required on all ''Common Slope'', ''Steep Slope'', and ''Extreme Slope'' roofs, but is not required || 2023-June-16 }}
<ol>
<li>{{hilite | over unheated spaces, and || 2023-June-16 }}
<li>{{hilite | where the roof overhang exceeds 914.4 mm (36") measured along the roof slope from the edge of the roof to the inner face of the exterior ''wall''. || 2023-June-16 }}
</li></ol>
<li>{{hilite |Sheet membrane ''eave protection''|| 2021-June-30 }}
<ol>
<li>must conform to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<li>{{hilite | must be installed on the ''supporting deck'' or on a ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | may also serve as an air barrier or vapour retarder, or as both, when installed in combination with an ''underlayment'' sharing the same performance characteristics|| 2021-June-30 }},
<li>{{hilite | must be at least 1 mm thick when the roof slope exceeds 1:6 (2” in 12”)|| 2021-June-30 }},
<li>{{hilite | shall be at least 3 mm thick when the roof slope is less than 1:6 (2” in 12”)|| 2021-June-30 }}. and
<li>must be carried
<ol>
<li>a minimum of 609.6 mm (24") up inside interior walls (914.4 mm (36") in heavy snow load conditions, and
<li>down the vertical face of the eave and rake edges by at least 50.8 mm (2").
</li></ol>
</li></ol>
</li></ol>

====8.1.3.2. Valley Protection====

<ol>
<li>Valley Protection is required on all ''projects'', shall conform to the requirements for eave protection in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]], and shall be specified to cover the entire valley, even where eave protection is exempt.
</li></ol>

====8.1.3.3. Field Underlayment====

<ol>
<li>''Underlayments'' are required on all Architectural Sheet Metal Panel Systems, and
<ol>
<li>must be self-adhering when the roof slope is equal to or greater than 1:6 (2" in 12") but is less than 1:3 (4" in 12"), and
<li>may be nail-applied or self-adhered when the roof slope is 1:3 (4" in 12") or greater.
</li></ol>
<li>{{hilite | Self-adhered membranes specified for ''low slope'' roofs (slopes less than 1:3 (4" in 12")) must || 2023-June-16 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2023-June-16 }} [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]{{hilite | , and || 2023-June-16 }}
<li>{{hilite | achieve a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")) || 2023-June-16 }}
</li></ol>
<li>{{hilite |Multiple layers of self-adhering ''eave protection'' membrane may be specified to achieve the minimum thickness requirement in this Article, but|| 2021-June-30 }}
<ol>
<li>{{hilite |each layer must be at least 1.4 mm thick,|| 2021-June-30 }} and
<li>{{hilite |layering must be permitted by the '''''Guarantor''''' through a written Variance (Ref. [[#1.1.3.6. Variances | Article 1.1.3.6.]])|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Underlayments for roofs in high snow load conditions are governed by the requirements in || 2026-February-1 }} [[#9.1.3.3. Panel Seams | {{hilite | Article 9.1.3.5. || 2026-February-1 }}]].
</li></ol>

====8.1.3.4. Separation Layer Between Materials====

<ol>
<li>A separation layer {{strike| material || 2026-January-28 }} is required
<ol>
<li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or
<li>{{hilite |when soldering is to be done|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), a|| 2027-February-1 }} {{hilite |vapour-permeable ''separation layer'' {{hilite | conforming to the requirements in [[#8.2.1.4. Separation Materials | Article 8.2.1.4.]]|| 2027-February-1 }} is required between metal panels and insulation.|| 2021-June-30 }}
<li>{{hilite | Self-adhered underlayments that are impermeable, that are used in an uninsulated ''roof assembly'' and which are manufactured with a non-bonding top facer, do not require an additional separation layer|| 2027-February-1 }}.
</li></ol>

====8.1.3.5. Ventilation Beneath Panels====
{{hilite | (See [[Notes to ASM Standard#A-8.1.3.5. | Note A-8.1.3.5.]]. || 2024-January-31 }} {{hilite | Also see [[#8.3.2.6. Ventilation Materials | Article 8.3.2.6.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] for installation requirements) || 2027-February-1 }}

<ol>
<li>{{hilite | A ''ventilation'' {{hilite | (drying) || 2027-February-1 }} ''space'' beneath metal roof panels|| 2021-October-30 }}
<ol>
<li>{{hilite | is required on slopes less than 1:3 (4” in 12”)|| 2021-October-30 }},
<li>is required beneath curved panel ''systems'', and
<li>{{hilite | is recommended when the roof slope exceeds 1:3 (4” in 12”)|| 2021-June-30 }}.
</li></ol>
<li>{{strike| {{hilite | Ventilation beneath panels shall be incorporated into the ''roof system'' design|| 2021-October-30 }} || 2026-January-27 }}{{hilite | A ''ventilation'' (drying) ''space'' beneath panels shall conform to the installation requirements in this Standard and shall be achieved by || 2027-February-1 }}
<ol>
<li>{{hilite | {{strike| by || 2026-January-27 }} supporting the metal panels with entangled mesh {{hilite | conforming to the material requirements in [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]|| 2027-February-1 }}{{strike| that is at least 6.35 mm (1/4”) thick, and by securing the panels using standard panel clips supported on EPDM pads equal in thickness to the entangled mesh (Ref. [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])|| 2021-October-30 }}|| 2026-January-27 }}, or
<li>{{hilite | {{strike| by || 2026-January-27 }} elevating unsupported metal panels above the underlying substrate materials by at least 9.53 mm (3/8”), {{hilite | provided the panels satisfy the requirements in Article 1.1.3.1., Sentence (2)|| 2027-February-1 }}. {{strike| and securing the panels with tall panel clips; this approach does not require EPDM pads and entangled mesh, and is acceptable provided {{strike| the ''Design Authority'' supplies the '''''Guarantor''''' with written engineering certification that || 2023-January-26 }}|| 2021-October-30 }} || 2026-January-27 }}
{{strike| <ol>
<li>{{hilite | the ''Contractor'' provides the '''''Guarantor''''' with written assurance concerning the load-bearing capacity of the panel system (Ref. || 2024-January-31 }} [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], "Submittals"),
<li>{{hilite | clips are fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | bearing plates (when used) are embedded in an acceptable sealant, to prevent water ingress around the screws. || 2024-January-31 }}
</li></ol>
</li></ol>
<li>{{hilite | When tall clips are used as an alternative to EPDM pads, the clips shall be fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | but when bearing plates are used without EPDM pads and support tall clips, the bearing plates shall also be embedded in sealant, to prevent water ingress around the screws. || 2024-January-31 }}

{{strike| <li>{{hilite | the clips will adequately secure and support the elevated panels|| 2021-October-30 }}.
<li>{{hilite | the panels are suitable as spanning members and will support anticipated live loads, including loads during construction|| 2021-October-30 }}. || 2023-January-26 }} || 2026-January-27 }}
</li></ol>
</li></ol>

==Section 8.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===8.2.1. Material Properties===
====8.2.1.1. Suitability of Materials====

<ol>
<li>{{hilite | All materials specified for use in a ''roof system'' must be expressly manufactured for use in a roof and must be listed in Division C (Ref. || 2024-June-15 }} [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.).]]
<li>{{hilite | Materials used for ''eave or valley protection'', as an ''underlayment'', or as a ''separation layer'', must not damage the painted finish of roof panels (a scratched or marred finish may result in panel corrosion)|| 2020-July-3 }}.
<li>{{hilite | When a material not listed in [[Division_C | Division C]] is specified for application in an Architectural Sheet Metal Roof System, the ''Design Authority'' must request a written Variance from the '''''Guarantor'''''|| 2020-July-3 }}.
<li>{{hilite | The ''Design Authority'' must select the most suitable material for eave protection, a separation layer, or as an underlayment, based on || 2024-June-22 }}
<ol>
<li>{{hilite | where the material will be located within the roof assembly, || 2024-June-15 }}
<li>{{hilite | the anticipated service temperature for the material, and || 2024-June-15 }}
<li>{{hilite | the material's published service temperature rating (see || 2024-June-15 }} [[Notes to ASM Standard#A-8.2.1.1.(3) | Note A-8.2.1.1.(3)]]).
</li></ol>
<li>All membranes must be supplied with proprietary sealants, mastics, tapes, and primers, each one suitable for the application of the ''underlayment''.
</li></ol>

====8.2.1.2. Eave and Valley Protection====

<ol>
<li>{{hilite |{{hilite | Bituminous || 2026-February-1 }} sheet membranes used for ''eave and valley protection'' must|| 2021-June-30 }}
<ol>
<li>{{hilite | conform to the requirements in CSA-A123.22, "Self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection," || 2023-June-16 }}
<li>{{hilite | be made of bitumen with a high softening point and a minimum flow temperature of 87.7°C (190°F) when they are used immediately below any metal panels or flashing (Ref. ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material"), || 2023-June-16 }}
<li>be self-adhering, and
<li>{{hilite | have a sanded or synthetic, non-bonding top surface|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Butyl-based sheet membranes used for eave and valley protection shall || 2026-February-1 }}
<ol>
<li>{{hilite | be self-adhering and || 2026-February-1 }}
<li>{{hilite | have a synthetic, non-bonding top surface|| 2026-February-1 }}.
</li></ol>
</li></ol>

====8.2.1.3. Underlayment====

<ol>
<li>{{hilite | Mechanically attached polymeric ("synthetic") fabric underlayments shall conform to the criteria in || 2023-June-16 }} [http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf RGC ACWS-PUL, "RGC Acceptance Criteria for Mechanically Attached Polymeric Roof Underlayments Used in Water-shedding Systems"].
<li>{{hilite | {{hilite | Self-adhering modified bituminous or butyl-based || 2026-February-1 }} sheet membrane underlayments must conform to the requirements in [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]] {{hilite | and || 2024-January-31 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]|| 2022-June-17 }}
</li></ol>
</li></ol>

====8.2.1.4. Separation Layer====

<ol>
<li>{{hilite | Separation layer materials || 2027-February-1 }}
<ol>
<li>{{hilite | must be manufactured as rolled goods and shall resist bonding with the underside of metal panels, and || 2027-February-1 }}
<li>{{hilite | may be self-adhered or loose laid || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Breathable separation layers shall be manufactured to allow the passage of water vapour through the material and therefore shall have a minimum permeability rating of 5 perms, tested and validated using ASTM E96/E96M-22a, "Standard Test Method for Gravimetric Determination of Water Vapour Transmission Rate of Materials" (products with a US permeability rating less than 5 perms are considered impermeable and therefore unsuitable as separation materials in insulated roof systems) || 2027-February-1 }}.
<li>{{hilite | Entangled mesh || 2023-June-16 }} (See [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]), {{hilite | which is commonly used for ventilation immediately beneath metal panels, may also serve as a separation (bond-breaking) material. || 2023-June-16 }}
</li></ol>

====8.2.1.5. Ventilation Materials====

<ol>
<li>{{hilite | Entangled mesh used in a ventilation cavity must {{strike| be || 2025-February-1 }}|| 2021-October-30 }}
<ol>
<li>{{hilite | be manufactured from polymeric filaments that fuse where they intersect|| 2026-February-1 }},
<li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
<li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.
</li></ol>

====8.2.1.6. Fasteners====

<ol>
<li>Mechanical fasteners used to secure nail-applied underlayments must conform to the underlayment manufacturer’s requirements.
<li>Staples are not permitted.
</li></ol>

==Section 8.3. Application==
===8.3.1. Guarantee Term Requirements===
====8.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.3.2. All Systems===
====8.3.2.1. Installation of Eave Protection====

<ol>
<li>{{hilite | Where ''eave protection'' is required, it must || 2023-June-22 }}
<ol>
<li>{{hilite | overhang the fascia by at least 25.4 mm (1”), || 2023-June-22 }}
<li>{{hilite | extend up the slope at least 914.4 mm (36"), or to a line not less than 609.6 mm (24") inside the inner face of the exterior wall || 2023-June-22 }} (914.4 mm (36") in regions with heavy snow; see {{hilite | '''Figure 8.3.2.1.-A''' || 2026-February-1 }}), and
<li>{{hilite | extend up all abutments (walls, skylights, etc.) at least 152.4 mm (6″) above the surface of the ''finished system surface''. || 2023-June-22 }}
</li></ol>
<li>{{hilite | Horizontal runs of ''eave protection'' must be positively lapped at least 50.8 mm (2″) and end laps (vertical joints) must be at least 152.4 mm (6″). || 2023-June-22 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 8.3.2.1.-A Eave Protection Requirements''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 8.3.2.1.(1) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File: Figure 8.3.2.-A (ASM).jpg | link=https://rpm.rcabc.org/images/1/17/Figure_8.3.2.-A_%28ASM%29.jpg | 500 px]]
|}

====8.3.2.2. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membranes must|| 2021-June-30 }}
<ol>
<li>{{hilite | be the same materials used for ''eave protection'', conforming to the requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],|| 2021-June-30 }},
<li>{{hilite | be centred on,|| 2021-June-30 }} and installed parallel to, the valley line, extending from the eave edge past the upper end of the valley metal flashing, at least 50.8 mm (2”),
<li>{{hilite | be at least 990.6 mm (39”) wide and centred on the valley|| 2021-June-30 }},
<li>positively overlap lower runs of valley membrane by no less than 152.4 mm (6”), rolled to ensure even, full adhesion, and
<li>{{hilite | positively lap and seal to the ''eave protection'' membrane|| 2021-June-30 }}.
</li></ol>
</li></ol>

====8.3.2.3. Underlayment for Common and Steep Slopes====

<ol>
<li>All nail-applied polymeric ("synthetic") ''underlayments'' installed on slopes less than 2:3 (8” in 12”)
<ol>
<li>shall be installed using fasteners acceptable to the manufacturer of the ''underlayment'',
<li>shall be secured to conform to the ''underlayment'' manufacturer's published instructions,
<li>must run parallel to the eave,
<li>shall positively overlap adjacent material by
<ol>
<li>at least 76.2 mm (3″) along the sides, unless exceeded by the ''manufacturer’s'' instructions, and
<li>at least 152.4 mm (6″) at the ends, unless exceeded by the ''manufacturer’s'' instructions,
</li></ol>
<li>must run beneath all ''water-shedding system'' materials, irrespective of slope,
<li>must extend beneath all perimeter ''linear metal flashing'',
<li>shall cover the roof deck beneath all penetration flashings, and
<li>must be carried up vertical surfaces at least 152.4 mm (6”) above the ''roof deck'', where roofing materials and flashings adjoin walls or curbs.
</li></ol>
<li>"Negative" laps that are unavoidable in horizontally applied courses of ''underlayment'' are permissible, but only when
<ol>
<li>the ''underlayment'' is a self-adhering membrane (Ref. [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]),
<li>the membrane runs overlap at least 152.4 mm (6"), and
<li>lapped seams are roller-pressed and sealed with a compatible sealant along the seam edge.
</li></ol>
<li>Installing nail-applied polymeric ("synthetic"), self-adhered bituminous, or butyl ''underlayments'' perpendicular to the eave is permissible but the laps must be self-sealing or must be sealed with a suitable lap cement provided by the underlay manufacturer.
<li>When an ''underlayment'' is installed perpendicular to the eave and the roof slope exceeds 2:3 (8” in 12”), the ''underlayment''
<ol>
<li>shall be self-adhering,
<li>must extend beyond the furthermost edge of the flashing at least 101.6 mm (4"), and
<li>shall positively laps beneath other vertical membranes.
</li></ol>
</li></ol>
</li></ol>

====8.3.2.4. Underlayment for Slopes Less Than 1:3====

<ol>
<li>All roofs sloped less than 1:3 (4" in 12") must be covered with one or more layers of self-adhered or thermally fused ''underlayment'' membrane,
<ol>
<li>conforming to the material requirements in [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>achieving a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")), and
<li>installed to conform to the requirements in [[#8.3.2.4. Underlayment for Slopes Less Than 1:3 | Article 8.3.2.4.]]
</li></ol>
<li>{{hilite |Applying multiple layers of self-adhering ''eave protection'' membrane to achieve the minimum thickness requirement is permissible, provided|| 2021-June-30 }}
<ol>
<li>layering is acceptable to the underlayment manufacturer,
<li>{{hilite |the second layer is offset from the first by at least 304.8 mm (12"), both horizontally and vertically,|| 2021-June-30 }} and
<li>{{hilite | the ''Design Authority'' has obtained a written Variance from the '''''Guarantor''''' permitting multiple layers. || 2023-June-16 }}
</li></ol>
</li></ol>

====8.3.2.5. Separation Materials====

<ol>
<li>Horizontal runs of separation materials must be positively lapped at least 50.8 mm (2"), and vertical end joints must be lapped at least 152.4 mm (6").
</li></ol>

====8.3.2.6. Ventilation Materials====

<ol>
<li>{{strike| ''Roof systems'' that require a ventilation space shall conform to the design specifications and required in [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]] || 2026-January-27 }}{{hilite | Ventilation materials shall be installed to conform to [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] || 2027-February-1 }}
</li></ol>

<hr>
<div id=PART_9></div>

=Part 9 - Roof Field (Panel Systems)=

==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary roof covering, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed using only RoofStar-accepted panels (or panels manufactured with a RoofStar-accepted roll forming machine) secured with a hidden clip system; flange-fastened panels may not be specified or installed.
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====
(See [[Notes to ASM Standard#A-9.1.3.1.| Note A-9.1.3.1.]])

<ol>
<li>Shop drawings for each ''project'' detail, which may be drawn by the ''Contractor'', must be reviewed by the Accepted observer and returned to the ''Guarantor'', verifying conformity to the '''''RoofStar Guarantee Standards''''' prior to the start of construction.
<li>Each construction detail must be reviewed during a field review and documented in the observer's RGC field review report, to verify conformity to the '''''RoofStar Guarantee Standards'''''.
<li>A system designed with a slope less than 1:6 (2" in 12") must conform to the limitations and conditions in [[#2.1.3. All Systems | Subsection 2.1.3.]]

<li>{{hilite | Metal panel seam types must conform to the following permissible applications and length limitations, to '''Table 9.1.3.3.-A''', and to any other seam requirements in this Part, to qualify for a '''''RoofStar Guarantee'''''|| 2027-June-11 }}:
<ol>
<li>{{hilite | Mechanically locked standing seams utilizing concealed clips ('''Figure 9.1.3.1.-A''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used on roof slopes 1:6 (2” in 12”) or greater (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies || 2027-June-22 }},
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]]|| 2027-June-11 }},
<li>{{hilite | may be permitted for slopes less than 1:6, but this is subject to a Variance review (See Variance requirements in [[#2.1.3. All Systems | Subsection 2.1.3.]])|| 2027-June-11 }},
<li>{{hilite | shall be seamed with butyl when the primary slope is 1:4 (3” in 12”) or less (See '''Table 9.1.3.3.-A'''; also see [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]] and '''Figure 9.3.2.4.-A''') and|| 2027-June-11 }}
<li>{{hilite | are the only seams permitted in locations with high snow loads (for more about high snow load conditions, see [[#9.1.3.5. Roofs in High Snow Load Conditions | Article 9.1.3.5.]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams utilizing concealed clips ('''Figure 9.1.3.1.-B''') || 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-cap seams utilizing concealed clips ('''Figure 9.1.3.1.-C''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams on flange-fastened panels ('''Figure 9.1.3.1.-D''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be installed only in uninsulated assemblies|| 2027-June-11 }},
<li>{{hilite | are permissible only on roof slopes greater than 1:3 (4" in 12"), and|| 2027-June-11 }}
<li>{{hilite | are limited to a maximum length of 9144 mm (30’)|| 2027-June-11 }}.
</li></ol>
<li>The ''Design Authority'' must calculate the maximum panel length based on
<ol>
<li>the material type,
<li>the direction of expansion and contraction that is determined by the location of drag load fasteners, and
<li>the amount of expansion and contraction provided by
<ol>
<li>the fastener slot on the fastening flange, or
<li>the concealed expansion clip slot.
</li></ol>
</li></ol>
<li>Panels must be able to withstand loads as required in [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>Panels must be solidly supported (See '''Figure 9.1.3.1.-A''' (1 and 2)), unless
<ol>
<li>the panel is made to be self-supporting (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]; also see [[#9.2.1.1. Panel Grade, Gauge, and Fabrication | Sentence 9.2.1.1.(9)]]), or
<li>a ventilation space is required and the panels are suitably supported with entangled mesh (See [[#8.1.3.5. Ventilation Beneath Panels
| Article 8.1.3.5.]]; also see '''Figures 9.3.2.5-A''' through '''F''' in [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration) || colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]] || [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|-
|}

====9.1.3.2. System Securement====

<ol>
<li>{{hilite | Panel shape and securement must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]).
<li>Metal panels must be pinned to the structure with fasteners, to prevent slippage down the roof because of the weight of the ''roof system'' ("drag loads").
</li></ol>

====9.1.3.3. Panel Seams====

<ol>
<li>Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}.
</li></ol>
 
::::::::::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights''' || 2026-February-1 }} {{hilite | Forming Part of Article 9.1.3.3. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! {{hilite | Conditions || 2026-February-1 }} (see also Part 2) !! Seam Height Minimums !! Permissible Seam Types
|-
| 1:3 (4" in 12") or greater || 25.4 mm (1") || All
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 1:6 (2" in 12") to (less than) 1:3 (4" in 12") || 38.1 mm ( 1-1/2”) || Mechanical Lock only (single or double)
|-
| 41.28 mm ( 1-5/8”) || Snap Lock (male seam)
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender) || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || Mechanical Lock only (single or double)
|-
| 50.8 mm (2”) || Mechanical Lock only (double)
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | Power-curved panels (reviewed by RGC prior to tender) || 38.1 mm (1-1/2”) + butyl sealant in seam || Mechanical Lock only (single or double)
|-
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | {{hilite | Locations with High Snow Loads (defined in Article 1.1.3.3.) || 2026-February-1 }} || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || {{hilite | Mechanical Lock only (double) || 2026-February-1 }}
|}

====9.1.3.4. Curved Panel Systems====
(See [[#9.3.2.8. Curved Panels | Article 9.3.2.8.]])

<ol>
<li>Curved panel systems
<ol>
<li>are permissible, but because a curved system diminishes in slope to a zenith of 0°, the design must be submitted to the '''''Guarantor''''' prior to tender (See [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>may be specified with a minimum seam height of 38.1 mm (1-1/2") (subject to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>must continuously cover a curved substrate; segmented panels are not permissible, and
<li>must incorporate a ventilation space (see [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]).
</li></ol>
<li>{{hilite | Stiffeners are optional for curved panels, and when they are desired, the ''Design Authority'' should consult with the ''Contractor'' about stiffener profiles that can be power-curved. || 2023-June-16 }}
</li></ol>

===={{hilite | 9.1.3.5. Roofs in High Snow Load Conditions || 2026-February-1 }}====
<ol>
<li>Roofs subject to high snow loads ([[#1.1.3.3. Snow Loads | Article 1.1.3.3.]]) require
<ol>
<li>full support for metal panels,
<li>a self-adhered underlayment conforming to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] and [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>metal panels seams
<ol>
<li>with a height no less than 50.8 mm (2”) (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>that are double-locked, and
<li>sealed with butyl (See [[#9.3.2.4. Panel Securement and Seam | Sentence 9.3.2.4.(7)]]),
</li></ol>
<li>valleys conforming to [[#10.1.5.3. Valleys for Heavy Snow Load | Article 10.1.5.3.]], and
<li>placement of penetrations near the ridge line of the roof.
</li></ol>
<li>Insulated (above the roof deck; see [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]]) architectural sheet metal roofs must be designed to conform to the requirements in Sentence (1) and shall be designed with slopes equal to or greater than 1:1.5 (8” in 12”) and must permit the free discharge of snow from the roof, except where life safety is concerned.
<li>A roof with slopes less than 1:1.5 (8” in 12”) shall conform to the requirements in Sentence (1) and must be designed as a vented (cold) roof in which
<ol>
<li>the vented space above the insulation assembly shall be determined by a Building Envelope Consultant but shall not be less than 76.2 mm (3”)
<li>the supporting deck for the metal panel system is plywood with a minimum thickness of 19.05 mm (3/4”) (thickness is subject to the engineering requirements in Sentence (2)),
<li>the underlayment is self-adhering and possesses a minimum thickness of
<ol>
<li>1.0 mm when it is butyl-based,
<li>1.5 mm when it is bituminous, or
<li>3.0 mm when the slope is less than 1:6 (2” in 12”) (See [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]]), and
</li></ol>
<li>entangled mesh and EPDM pads are capable of supporting the anticipated loads from snow and other service conditions, without deformation (See [[#8.2.1.5. Ventilation Materials | Articles 8.2.1.5.]] and [[#9.2.1.6. EPDM Pads | Article 9.2.1.6.]]).
</li></ol>
</li></ol>

===9.1.4. Insulated Systems===
====9.1.4.1. General Requirements====

<ol>
<li>{{hilite | Insulated ''Architectural Sheet Metal Roof Systems'' || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-22 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]),
<li>{{hilite | shall conform to all other requirements in this Standard, || 2023-June-16 }} and
<li>{{hilite | shall minimize or eliminate thermal bridging, using thermally non-conductive clips or bars, or by using mechanically fastened bearing plates || 2023-June-16 }} (see [[#Part 7 - Insulation | Part 7, "Insulation"]]).
</li></ol>
</li></ol>

===9.1.5. Uninsulated Systems===
====9.1.5.1. General Requirements====

<ol>
<li>{{hilite | Uninsulated Architectural Sheet Metal Roof Systems || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]), and
<li>{{hilite | shall conform to all other requirements in this Standard. || 2023-June-16 }}
</li></ol>
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===9.2.1. Material Properties===
====9.2.1.1. Panel Grade, Gauge, and {{strike| Selection || 2025-February-1 }} {{hilite | Fabrication || 2026-February-1 }}====

<ol>
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06, CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06, ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
<li>'''Aluminum-Zinc alloy-coated steel''': 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06, CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>{{hilite | All panels must be factory-manufactured, or site-fabricated by an accepted ''Contractor'', and listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Metal panels must be fabricated to fully span the distance from eave to ridge, unless interrupted by ''curbs'', ''walls'', or penetrations || 2026-February-1 }}.
<li>{{hilite | Notwithstanding Sentence (4), curved metal panels, including metal panels over barrel-shaped structures (See|| 2026-February-1 }} [[#2.1.3.1. General Requirements for Roof Slope | {{hilite | Sentence 2.1.3.1.(3)|| 2026-February-1 }}]] {{hilite | concerning pre-tender reviews by the '''''Guarantor'''''), may be manufactured in segments when || 2026-February-1 }}
<ol>
<li>{{hilite | panel lengths are too long to be practicable (for example, on a barreled roof), or|| 2026-February-1 }}
<li>{{hilite | the panel material’s coefficient of thermal expansion will induce movement that exceeds the capacity of panel clips (See also|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) | {{hilite | Note A-9.2.1.1.(5)(2))|| 2026-February-1 }}]],
{{hilite | but this is permissible only when|| 2026-February-1 }}
<ol>
<li>{{hilite | the ''Design Authority'' requests a written Variance from the '''''Guarantor''''' prior to tendering the project|| 2026-February-1 }},
<li>{{hilite | the roof slope at the point of division is not less than 1:2 (6” in 12”) (See '''Figure 9.2.1.1.-A'''; also see|| 2026-February-1 }} [[Notes to ASM Standard#Note A-9.2.1.1.(5)(4) | {{hilite | Note A-9.2.1.1.(5)(4)|| 2026-February-1 }}]]{{hilite | ), || 2026-February-1 }}
<li>{{hilite | the transition flashing between panel segments has a slope of at least 1:3 (4” in 12”) (See '''Figure 9.2.1.1.-B'''), and || 2026-February-1 }}
<li>{{hilite | the ''Contractor'' has submitted to the '''''Guarantor''''' the engineered shop drawings showing the detailing of the division of metal panels, as part of the request for a written Variance|| 2026-February-1 }}.
</li></ol>
</li></ol>
<li>Sheet steel, copper and zinc roof panels may be roll-formed to a maximum width of 500 mm (20”).
<li>All metal roof panels over 304.8 mm (12”) in width must be roll-formed or factory-fabricated with stiffening ribs or striations.
<li>Panels fabricated with perforated fastening holes or slots must not exceed 9144 mm (30’) in length.
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath the panels that are not supported by a ''ventilation layer'', and tall clips are used to support the raised panels, the panels must be engineered to support anticipated live loads without permanent deformation (Ref. [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-A Segmented Curved Metal Panels Showing Transition Flashing''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-B Minimum Slope Requirements for Segmenting Curved Metal Panels''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 9.2.1.1.-A.png | link=https://rpm.rcabc.org/images/e/ef/ASM_Figure_9.2.1.1.-A.png | 450 px]] || [[File:ASM Figure 9.2.1.1.-B.png | link=https://rpm.rcabc.org/images/c/ca/ASM_Figure_9.2.1.1.-B.png | 450 px]]
|}

====9.2.1.2. Roll Forming Machines and Mill Certificate====

<ol>
<li>All machines used by a ''Contractor'' to fabricate metal panels shall be owned by a ''Contractor'', and shall be accepted by the '''''Guarantor'''''.
<li>Site-forming metal panel machines
<ol>
<li>must be certified annually by a third-party engineer,
<li>must be serviceable, maintained and calibrated with supporting documentation, and
<li>records documenting the serviceable condition of the machine must be submitted annually to the '''''Guarantor'''''.
</ol></li>
<li>''Contractors'' who own metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.
<li>the ''Contractor'' must provide a mill certification for all metal roofing ''projects'' installed under the '''''RoofStar Guarantee Program'''''.
<li>Mill certificates must confirm that the sheet metal used for forming metal panels and ''linear metal flashings'' conform to or exceeds the requirements in [[#9.2.1.1. Panel Grade, Gauge, and Selection | Article 9.2.1.1.]]
</ol></li>

====9.2.1.3.{{hilite | Pre-painted Finishes|| 2022-February-5 }}====

<ol>
<li>{{hilite | When a painted finish on G90 galvanized or AL-Zn alloy coated steel panels is specified, SMP pre-painted finishes are permissible but|| 2022-February-5 }} {{hilite | PVDF (polyvinylidene fluoride, also referred to as PVF2) is strongly recommended for durability and resilience|| 2022-February-5 }}.
</li></ol>

====9.2.1.4.{{hilite | Fasteners|| 2022-February-5 }}====
(See also [[#3.2.2.1. Fasteners | Article 3.2.2.1.]])

<ol>
<li>Fasteners used to secure metal panels or clips must be
<ol>
<li>specified by the ''Design Authority'',
<li>compatible with the material they contact,
<li>appropriately sized, in both length and thread type, for the material to which they will be secured, and
<li>corrosion-resistant screws with a low-profile head.
</li></ol>
</li></ol>

====9.2.1.5.{{hilite | Clips {{hilite | and Bearing Plates || 2025-January-31 }}|| 2022-February-5 }}====
(See [[Notes to ASM Standard#A-9.2.1.5.| Note A-9.2.1.5.]])

<ol>
<li>Clips must be
<ol>
<li>{{strike| proprietary (not shop fabricated) || 2024-February-1 }} {{hilite | engineered || 2025-January-31 }} and must be acceptable to the roll form machine manufacturer, for use with Architectural Sheet Metal Roof Systems, and
<li>compatible with the metal panel and other materials they contact.
</li></ol>
<li>Attachment clips for Architectural Sheet Metal Roof Systems shall be manufactured with evenly spaced indents or guide holes for fastener placement, and {{strike| must || 2024-February-1 }} {{hilite | may || 2025-January-31 }} be formed from
<ol>
<li>Steel (Z275 or G90)(AZ50 or AZM150),
<li>Aluminum, or
<li>Stainless Steel.
</li></ol>
<li>{{hilite | Bearing plates shall be || 2025-January-31 }}
<ol>
<li>{{hilite | sufficiently rigid to resist distortion in service, and || 2025-January-31 }}
<li>{{hilite | engineered and suitable to support all expected loads, including compression loads || 2025-January-31 }}.
</li></ol>
</li></ol>

===={{hilite | 9.2.1.6. {{strike| Bearing Plates and || 2024-February-1 }} EPDM Pads || 2025-January-31 }}====

<ol>
{{strike| <li>{{hilite | Bearing plates shall be || 2023-June-16 }}
<ol>
<li>{{hilite | manufactured from corrosion-resistant steel, || 2023-June-16 }}
<li>{{hilite | of sufficient gauge to resist distortion under load, conforming to the engineered shop drawings, || 2023-June-16 }}
<li>{{hilite | formed with recesses for fasteners, || 2023-June-16 }} and
<li>{{hilite | press-formed to bevel the edges, for load distribution over the substrate. || 2023-June-16 }}
</li></ol> || 2024-February-1 }}
<li>{{hilite | EPDM pads used to support panel clips|| 2021-June-30 }}
<ol>
<li>{{hilite | must be sufficiently dense and thick (after compression)|| 2021-June-30 }}
<ol>
<li>{{hilite | to equal the thickness of the ventilation layer (Ref. [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]),|| 2021-June-30 }} and
<li>to resist curling when placed under load.
</li></ol>
<li>shall extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
</li></ol>

====9.2.1.7. {{hilite |Sealants|| 2022-February-5 }}====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</li></ol>
<li>Sealants shall conform to any one of the following standards:
<ol>
<li>CGSB 19-GP-5M, "Sealing Compound, One Component, Acrylic Base, Solvent Curing"
<li>CAN/CGSB-19.13, "Sealing Compound, One Component, Elastomeric, Chemical Curing"
<li>CGSB 19-GP-14M, "Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing"
<li>CAN/CGSB-19.24, "Multi-Component, Chemical Curing Sealing Compound"
</li></ol>
</li></ol>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the roof surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1., "Use of Accepted Materials"]]).
<li>The ''Contractor'' must retain factory packaging or provide other adequate covering for metal panels, to protect them from condensation between adjacent surfaces, until the panels are installed.
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Roof Panel Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer''.
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite | be constructed only with RoofStar-accepted panels secured by hidden clips; flange-fastened panels are not permitted|| 2022-February-5 }}.
</li></ol>
</li></ol>

===9.3.2. All Systems===
===={{hilite | 9.3.2.1. Preparation of Substrate || 2023-June-16 }}====

<ol>
<li>All supporting decks must be acceptable to the ''manufacturer'' and must be
<ol>
<li>made suitable for roofing by others (trades other than the ''Contractor''),
<li>dimensionally stable,
<li>structurally sound,
<li>capable of accommodating ''roof system'' component movement,
<li>clean,
<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[ASM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
<li>reasonably smooth and free of abrupt elevation changes, and
<li>absolutely free of
<ol>
<li>dust,
<li>dirt,
<li>voids,
<li>open cracks,
<li>sharp projections,
<li>contaminants,
<li>objectionable surface treatments,
<li>laitance (concrete must be “native”),
<li>oil, and
<li>grease
</li></ol>
</li></ol>
<li>All concrete decks must cure at least 28 days before receiving adhered membranes, but this limitation may be reduced if both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record ("adhered", as used in this requirement, means fully or intermittently bonding any membrane to the deck with an adhesive, hot asphalt (bitumen), or heat),
<li>Plywood decks with cracks or loose knots must be filled or overlaid with plywood (See [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]).
<li>Joints between plywood deck panels must be prepared and reinforced according to the manufacturer’s published requirements.
<li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
</li></ol>

====9.3.2.2. Preparation of Roofing Materials====

<ol>
<li>{{hilite | Roofing materials must be prepared for installation as required by the ''manufacturer''. || 2023-June-16 }}
</li></ol>

====9.3.2.3. General Requirements for Panel Installation====

<ol>
<li>Panels must be handled with non-marring slings and hoisted using a spreader bar.
<li>Sheet steel, copper, and zinc roof panels must be installed with a continuous minimum tolerance gap of 1/8” between the heels of the panels.
</li></ol>

====9.3.2.4. Panel Securement and Seams====

<ol>
<li>Panels must be secured to resist
<ol>
<li>{{hilite | ''Specified Wind Loads'' calculated for the ''roof system'' and shall conform to the specified design for the ''roof assembly'', and || 2023-June-16 }}
<li>{{hilite |gravitational (drag) loads|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All panels must be secured to a firm support, and when clips are used to secure metal panels, the clips must be firmly supported by the roof deck, bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' || 2023-June-16 }} (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>{{hilite | Clips that are unsupported by EPDM pads must be sealed against water intrusion by embedding the clips in a compatible sealant (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
<li>Unless otherwise permitted by the '''''Guarantor''''', clips must be attached by at least two fasteners (Ref. [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>Concealed fasteners shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and should provide clearance for the underside of the metal panel.
<li>Seam height shall conform to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }} of this Part.
<li>{{hilite | Where sealant is required in panel seams (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}), it shall be applied to evenly engage the top of the seam where panels join, as illustrated in '''Figure 9.3.2.4.-A.''' || 2025-January-31 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.3.2.4.-A Butyl Sealant in Seams''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 9.3.2.4.(7) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:ASM Figure 9.3.2.4.-A.png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6b/ASM_Figure_9.3.2.4.-A.png | 500 px]]
|}

====9.3.2.5. Panels Over Ventilation Materials or Voids====
(See [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])

<ol>
<li>When the roof is designed and constructed with {{hilite | a void or ventilation materials immediately beneath the metal panels, panels must be secured using|| 2021-June-30 }}
<ol>
<li>standard-height clips (matching the height of panel seams), which must be {{strike| fully supported || 2024-January-25 }} {{hilite | installed || 2025-January-31 }} {{hilite | on engineered bearing plates fully supported by appropriately sized || 2025-January-31 }} closed-cell {{hilite | EPDM {{strike| foam || 2024-January-24 }} pads|| 2025-January-31 }}, or
<li>{{hilite |tall clips, which must be|| 2021-June-30 }}
<ol>
<li>{{hilite |fabricated to match the combined height of the {{hilite | bearing plate || 2025-January-31 }}, EPDM {{strike| foam || 2024-January-24 }} pad, and the panel seam,|| 2021-June-30 }}
<li>secured with fasteners into their supports, and
<li>fully embedded in a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7., "Sealants"]]).
</li></ol>
</li></ol>
<li>EPDM foam pads employed to support standard-height panel clips are not a RoofStar-accepted material but nevertheless must
<ol>
<li>be fabricated with sufficient density and thickness (after compression) to equal the thickness of the ''ventilation layer'', and
<li>extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath panels that are not supported by a ''ventilation layer'', panels shall be supported by tall clips secured in keeping with the requirements in this Part|| 2021-June-30 }}.
</li></ol>

====9.3.2.6. Panel Terminations====

<ol>
<li>Metal panels must be secured at, {{hilite | and engaged to|| 2021-June-30 }}, the eaves by a continuous metal hook strip (see [http://rpm.rcabc.org/index.php?title=ASM_10.1.1_Eave_%26_Rake_Flashing_(Mechanical_Seam) ASM 10.1.1 Eave & Rake Flashing (Mechanical Seam)]).
<li>{{hilite | All panel terminations at the top of a slope must be|| 2021-June-30 }}
<ol>
<li>turned up (bread-panned) to {{hilite | match the panel seam|| 2021-June-30 }} height, and shall not be cut, and
<li>{{hilite |flashed with a positively shedding cap, hip or ''wall'' flashing (see [[#10.3.4. Perimeter Details, Walls, and Openings | Subsection 10.3.4., "Perimeter Details, Walls, and Openings"]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |When panels terminate at the top of a ''common slope'' or ''low slope'' roof (slopes up to and less than 1:1 (12” in 12”)), they must be closed with additional metal Z-closure|| 2021-June-30 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened to the metal roof panel, or fastened through the panel into the ''deck'' when the fasteners also serve as drag load securement|| 2021-June-30 }}.
</li></ol>
</li></ol>

====9.3.2.7. Reserved====
====9.3.2.8. Curved Panels====
(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])

<ol>
<li>All panels manufactured for a curved substrate
<ol>
<li>must be supported by a Variance issued by the '''''Guarantor''''' prior to tender (see [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>must be power-curved as a continuous panel, without segments,
<li>shall be manufactured with seams conforming to [[#9.1.3.3. Panel Seams | Article 9.1.3.3.]], and
<li>must continuously cover a curved substrate (segmented panels are not permissible).
</li></ol>
<li>Roofs constructed with curved panels must incorporate a ventilation space in keeping with [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]
</li></ol>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify {{hilite | the connections between the ''roof system'' and ''walls'' or other building components, particularly where the continuity of air, vapour and water-resistive layers is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]|| 2021-October-30 }}).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>{{hilite | Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Where the roof deck and an adjoining wall are constructed of dissimilar materials (i.e., steel deck joined to concrete wall), differing expansion and contraction rates for the two materials may adversely affect the roof system and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular roof-wall intersection || 2023-June-16 }} (See [[Notes to ASM Standard#A-10.1.3.1. | Note A-10.1.3.1. ]]).
<li>{{hilite | When EIFS cladding is cut to permit roofing work, the exposed insulation must be restored with back-wrapped mesh, a base coat and finish coat, or with another method that is equal or superior|| 2022-October-22 }} (See [[Notes to ASM Standard#A-10.1.2.2| Note A-10.1.2.2]]).
<li>Fascia may be covered with metal flashing and specified as part of the ''roof system''.
</li></ol>

====10.1.3.2. Flashing====

<ol>
<li>All changes in plane in the ''roof system'', and all intersections between the roof field and roof edges, ''walls'', or ''parapets'', must be flashed with {{hilite | material conforming to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]] {{strike| self-adhering sheet membrane eave protection, and with metal flashing || 2023-January-26 }}
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings designed for ''common slope'' and ''low slope'' roofs (slopes up to and including 1:1 (12” in 12”)) must be secured with hooked metal Z-closures which are || 2021-June-23 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Cap and hip flashings designed for ''steep slopes'' (roofs with a slope greater than 1:1 (12” in 12”)) may be|| 2021-June-30 }}
<ol>
<li>{{hilite | secured with metal Z-closures installed in keeping with the requirements in [[#10.3.4.1. Ridges | Article 10.3.4.1.]]|| 2021-June-30 }}, or
<li>{{hilite | secured to the standing seams with acceptable fasteners (flashing may be turned down between panel ribs to close off openings, to provide further protection from the weather)|| 2021-June-30 }}.
</li></ol>
</li></ol>

====10.1.4.2. Eave and Rake Edges====

<ol>
<li>Eave and rake edge details shall
<ol>
<li>be designed to resist wind uplift loads, and shall conform to the requirements in [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]], and
<li>{{hilite | permit the drainage of any liquid water out of the roof system (Ref. || 2023-October-28 }} [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====10.1.4.3. Walls====

<ol>
<li>Roof-to-wall flashings must
<ol>
<li>be engineer-designed to resist wind uplift, and
<li>allow for expansion and contraction.
</li></ol>
<li>All connecting flashings must be firmly secured
<ol>
<li>{{hilite |to a ''wall'' using a concealed continuous clip fastened at intervals not exceeding 304.8 mm (12”) O.C. (exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite |to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape, and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
</li></ol>

====10.1.4.4. Reserved====
====10.1.4.5. Windows and Wall Openings====

<ol>
<li>{{hilite | Windows and other wall openings adjacent an Architectural Sheet Metal Roof System shall conform to the relevant requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", || 2023-June-16 }} [[SBS_Roof_Systems_Standard#10.1.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.1.4.5.]].
</li></ol>

===10.1.5. Valleys===
====10.1.5.1. {{hilite | General Requirements for Valleys || 2026-February-1 }}{{strike| Valley Protection Membrane || 2025-February-1 }}====

<ol>
<li>{{hilite | Valleys should not terminate downslope at a wall or curb || 2026-February-1 }}.
<li>{{hilite | When the slope of a valley is less than 1:6 (2” in 12”) the ''Design Authority'' should consider designing the valley with a waterproofing membrane system rather than with a self-adhering underlayment and metal valley flashing || 2026-February-1 }} {{hilite | (See|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) (Metal Panels and the Coefficient of Thermal Expansion) | {{hilite | Note A-10.1.5.1.(2)|| 2026-February-1 }}]]).
{{strike| <li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]] || 2025-February-1 }}
</li></ol>

====10.1.5.2. Valley {{hilite | Protection || 2026-February-1 }}{{strike| Flashing || 2025-February-1 }}====

<ol>
<li>All valleys must be designed with both membrane flashing and metal valley flashing.
<li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]]
<li>Metal flashing must
<ol>
<li>incorporate a divider measuring at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider, and
<li>be secured to resist gravitational ("drag") loads.
</li></ol>
<li>Metal valley flashing shall be at least 127 mm (5") wide, measured between the divider and the edge of the metal roof panel, and may be either hooked or unhooked (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]).
</li></ol>

====10.1.5.3. Valleys for Heavy Snow Loads====

<ol>
<li>In regions with high snow loads, the minimum valley width should be increased and flared to widen at the eave (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]], and [[#10.1.5.1. Valley Protection Membrane | Article 10.1.5.1.]]).
</li></ol>

====10.1.5.4. Reserved====
====10.1.5.5. {{hilite | Crickets and|| 2026-February-1 }} Dead Valleys====
{{hilite | (See '''Figure 10.1.5.5.-A''' and '''Figure 10.1.5.5.-B''')|| 2026-February-1 }}

<ol>
<li>{{hilite | When terminating a valley at a ''wall'' or ''curb'' is unavoidable, the design must incorporate a cricket covered with a ''waterproofing roof system'', to divert water off the roof|| 2026-February-1 }}.
<li>{{hilite | Dead valleys should be avoided|| 2023-June-16 }}{{hilite |, but {{hilite | when a cricket is not practicable and|| 2026-February-1 }} roof slope terminates in a dead valley, it must be designed as a ''waterproofing roof system'' {{strike| the design must conform to the Application requirements in || 2023-June-16 }} [[#10.3.5.7. Dead Valleys | Article in 10.3.5.7.]] || 2025-February-1 }}
<li>{{hilite | All ''waterproofing roof systems'' used on crickets or in dead valleys must be carried up the vertical face of ''wall'' and ''curbs'' at least 304.8 mm (12”) when measured vertically from the ''drainage plane'', and any ''wall'' finishes must be terminated at least 203.2 mm (8”) above the cricket or dead valley, when measured vertically from the ''drainage plane'' || 2026-February-1 }} (See [[#10.3.5.7. Dead Valleys | {{hilite | Article in 10.3.5.7.|| 2026-February-1 }}]] and [[#10.3.7.2. Intersections with Waterproofing Roof Systems | {{hilite | Article 10.3.7.2.|| 2026-February-1 }}]]).
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5.-A Crickets and Dead Valleys''' Forming Part of Sentence 10.1.5.5.(1) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5-B Crickets and Waterproofing to Improve Drainage''' Forming Part of Sentence 10.1.5.5.(2) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 10.1.5.5.-A.png | link=https://rpm.rcabc.org/images/0/0e/ASM_Figure_10.1.5.5.-A.png | 400 px]] || [[File:ASM Figure 10.1.5.5.-B.png | link=https://rpm.rcabc.org/images/5/51/ASM_Figure_10.1.5.5.-B.png | 400 px]]
|}

==={{hilite | 10.1.6. Expansion and Control Joints || 2024-October-20 }}===
====10.1.6.1. Reserved====

====10.1.6.2. Control Joints====

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (roof dividers), and
<li>to specify their location and design.
</li></ol>
<li>{{hilite | Unless otherwise approved by the '''''Guarantor''''', ''control joints'' must be specified to divide a new ''roof system'' (addition) from existing ''roof systems'' || 2023-June-16 }} (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Roof Systems===
====10.1.7.1. Intersections with Waterproofing Roof Systems====

<ol>
<li>Intersections with ''water-shedding roofs'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Intersections with Membrane Gutters====

<ol>
<li>Refer to [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membrane====

<ol>
<li>{{hilite | Where a self-adhered membrane is required for flashing, it shall conform to the requirements for eave and valley protection in || 2024-January-31 }}{{hilite | {{strike| See || 2023-January-25 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] {{strike| for sheet membrane requirements. || 2023-January-26 }}|| 2021-June-30 }}
<li>{{hilite | Where the ''roof assembly'' adjoins a ''wall'', the ''wall'' must be flashed to provide continuity with the wall ''control layers'', and with the ''roof system'' underlayment using materials accepted by the '''''Guarantor''''' and having the following properties: || 2024-January-31 }}
<ol>
<li>{{hilite | When the primary slope of the roof is less than 1:6 (2" in 12"), flashing must be a self-adhered membrane with a minimum thickness of 3 mm (118 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is 1:6 (2" in 12") or greater but less than 1:3 (4" in 12"), flashing must be an exterior-reinforced self-adhered membrane with a minimum thickness of 1 mm (39 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is greater than 1:3 (4" in 12"), flashing material may be self-adhered or nail-applied. || 2024-January-31 }}
</li></ol>
{{strike| <li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm. || 2023-January-26 }}
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into roof perimeters and walls must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, ''Linear Metal Flashing'']]
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''linear metal flashing'' shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====
<ol>
<li>All wall surfaces to which roofing materials must be installed (including Concrete Masonry Unit (CMU)) must be declared suitable by the ''manufacturer'', or they must be covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membrane flashing shall be prepared following the ''manufacturer's'' published requirements.
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>All changes in plane in the ''roof assembly'' must be waterproofed beneath metal flashing with a self-adhering eave protection sheet membrane acceptable to the '''''Guarantor'''''.
<li>''Projects'' must follow proper sequencing so that materials, ''systems'', or ''assemblies'', installed by the ''Contractor'' correctly interface with materials, ''systems'', or ''assemblies'' installed by other trades, to establish or preserve continuity and ensure positive waterproofing connections (overlapping, “shingle fashion”).
<li>When coordination with other trades requires some adaptation to the requirements in this Standard, any variance to proper detail sequencing must be approved in writing by the ''Design Authority''.
<li>{{hilite | All sheet membrane flashing must be installed to conform to the ''manufacturer's'' published instructions, and must|| 2021-October-30 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]],
<li>{{hilite | be ''fully bonded'' to an acceptable substrate,|| 2021-October-30 }}
<li>{{hilite | be installed without fish-mouths or wrinkles|| 2021-October-30 }},
<li>{{hilite | be hand-rolled with a ''manufacturer’s'' accepted roller and ''fully bonded'' to an acceptable, prepared substrate|| 2021-October-30 }},
<li>be reinforced at all inside and outside corners with membrane gussets, measuring at least 101.6 mm x 152.4 mm (4” x 6”), excluding the tapered ends,
<li>overlap any wall membranes or finishes by at least 50.8 mm (2”), and
<li>underlap any wall membranes or finishes by at least 76.2 mm (3").
</li></ol>
<li>{{hilite | The upper termination of sheet membrane flashing must be protected from damage, and from water intrusion, || 2023-June-16 }}
<ol>
<li>{{hilite | with linear metal flashing installed in keeping with || 2023-June-16 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]], or
<li>{{hilite | with a wall finish installed by others. || 2023-June-16 }}
</li></ol>
<li>When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination.
<li>When sheet membrane flashing is mechanically secured with a termination bar or a metal flashing, fasteners must be spaced no more than 304.8 mm (12”) O.C.
<li>When a second metal flashing is installed to protect a termination bar or flashing used to secure the sheet membrane flashing, it may be fastened no more than 609.6 mm (24”) O.C., provided the ''linear metal flashing'' maintains continuous contact with the substrate.
<li>When closer fastener spacing is required by the ''manufacturer'', the wall must be constructed or modified to facilitate solid fastener securement.
<li>''Linear metal flashings'' must be secured in keeping with the requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]]
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>Membrane flashing must be protected from damage with full-coverage ''linear metal flashing''.
</li></ol>

===10.3.3. Reserved===
===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings installed on slopes 1:6 (2" in 12") up to and less than 1:1 (12” in 12”)|| 2021-June-30}} must be hooked to metal Z-closures which are
<ol>
<li>set in two (2) rows of gunnable sealant or sealant tape, and
<li>fastened through the metal roof panel into the deck.
</li></ol>
<li>{{hilite | Cap and hip flashings installed on roofs with a slope greater than 1:1 (12” in 12”) (''Steep Slopes'') may be|| 2021-June-30}}
<ol>
<li>{{hilite | hooked to a metal Z-closure|| 2021-June-30}}, and
<li>{{hilite | mechanically fastened to the standing seam with an acceptable fastener|| 2021-June-30 }}.
</li></ol>
<li>For roof slopes
<ol>
<li>up to 2:3 (8” in 12”), metal cap/hip flashing must extend a minimum of 152.4 mm (6") over metal roof panels, measured from the back pan, and extending on each side of the ridge/hip.
<li>equal to or greater than 2:3 (8” in 12”), the metal cap/hip flashing may be reduced by 76.2 mm (3”) over metal roof panels, measured from the back pan and extending on each side of the ridge/hip.
<li>greater than 1:1 (12” in 12”), an underlying support at the centre of the ridge is required to support the ridge cap flashing.
</li></ol>
</li></ol>

====10.3.4.2. Eaves and Rake Edges====
(See Construction Detail [[ASM Eave and Rake Edges (Mechanical Seams) | "Eave and Rake Edges (Mechanical Seams)"]])

<ol>
<li>All linear metal flashing installed at the eave or rake edges must
<ol>
<li>be completely separated from a wood ''deck'' with eave protection sheet membrane (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]), and
<li>allow for metal panel expansion and contraction.
</li></ol>
<li>Eave protection sheet membrane installed to separate eave and rake edge metal flashing from a wood ''deck'' shall extend past the edges of a flashing by at least 6.35 mm (1/4").
<li>Eave metal flashing
<ol>
<li>must be fabricated to secure the eave edge of the panel in place,
<li>shall extend onto the sloped ''deck'' or supporting member at least 76.2 mm (3”),
<li>shall be secured
<ol>
<li>along the top flange with screws spaced in accordance with the engineered design but no further apart than 304.8 mm (12”) O.C.,
<li>on the fascia metal flashing, utilizing a continuous clip fastened a maximum of 304.8 mm (12") O.C., and
<li>shall be covered with eave protection sheet membrane.
</li></ol>
<li>When external metal gutters are installed (See [[#11.3.3.9. External Gutters | Article 11.3.3.9.]]), linear metal eave flashing with a face less than 50.8 mm (2”) do not require a clip but must be securely fastened with an alternative method acceptable to ''Design Authority''.
</li></ol>
<li>Rake edge metal flashing must be firmly secured
<ol>
<li>{{hilite | to a ''wall'' using a concealed continuous clip fastened a maximum of 304.8 mm (12”) O.C. (Ref. [[#Part 13 - Linear Metal Flashing | Part 13]] for clip requirements; exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite | to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Where external metal gutters will be installed, the eave metal flashing should be installed to accommodate the gutter and hangar.
<li>When gutter hangars are to be fastened behind the eave flashing, the eave flashing does not require a continuous clip and may be face-screwed together with the gutter hangar.
</li></ol>
</li></ol>

====10.3.4.3. Reserved====
====10.3.4.4. Reserved====
====10.3.4.5. Windows and Wall Openings====

<ol>
<li>Windows and other wall openings that intersect with the ''roof system'' shall be flashed with membrane and metal conforming to the requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.3.4.5.]]
</li></ol>

===10.3.5. Valleys===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.5.1. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membrane must be installed in keeping with the requirements in [[#8.3.2.2. Valley Protection | Article 8.3.2.2.]]|| 2021-June-30 }}
</li></ol>

====10.3.5.2. General Requirements for Valley Metal Flashing====

<ol>
<li>Drag load fastening is mandatory on all valleys.
<li>Metal valley panels must
<ol>
<li>be installed shingle fashion,
<li>overlap the adjacent lower panel at least 203.2 mm (8"), and
<li>be sealed at the lapped joint with two horizontal rows of approved sealant.
</li></ol>
<li>Valley dividers are required and must be at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider.
<li>Exposed valleys must be at least 254 mm (10") wide (no less than 127 mm (5") per side, measured from the divider to the metal roof panel); wider valleys are recommended in high snow load areas (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]] and [[#10.1.5.3. Valleys for Heavy Snow Loads | Article 10.1.5.3.]]).
<li>{{hilite | Metal valley sections (hooked or unhooked) || 2023-June-16 }}
<ol>
<li>must overlap the section immediately down-slope at least 203.2 mm (8"),
<li>shall be embedded in at least two rows of an acceptable sealant or butyl tape where they overlap,
<li>shall be secured in keeping with the specified design, and
<li>shall be flashed ("stripped in") and sealed to the ''valley protection'' membrane with eave protection sheet membrane conforming to [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<ol>
<li>measuring at least a 304.8 mm (12”) in width, and
<li>applied to extend past the flashing fasteners by at least 38.1 mm (1-1/2”).
</li></ol>
</li></ol>
<li>Reverse laps must be sealed with a membrane-compatible sealant.
</li></ol>

====10.3.5.3. Hooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.1_Hooked_Valley_Flashing ASM 10.3.1 Hooked Valley Flashing])

<ol>
<li>Hooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.3. Hooked Metal Valleys | Article 10.3.5.3.]],
<ol>
<li>be fabricated with a built-in hook strip returned 38.1 mm (1-1/2") to
<ol>
<li>form a water cut-off, and
<li>hook onto the valley metal panel, and
</li></ol>
<li>incorporate a flange measuring at least 76.2 mm (3”) wide, to secure the metal valley flashing to its substrate.
</li></ol>
</li></ol>

====10.3.5.4. Unhooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.2_Unhooked_Valley_Flashing ASM 10.3.2 Unhooked Valley Flashing])

<ol>
<li>Unhooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.4. Unhooked Metal Valleys | Article 10.3.5.4.]],
<ol>
<li>be hemmed with a return measuring at least 38.1 mm (1-1/2") to form a water cut-off, and
<li>secured with continuous cleats
<ol>
<li>be fabricated from 26-gauge flat metal stock (min. thickness), and
<li>be fabricated with a leg measuring at least 76.2 mm (3”) wide.
</li></ol>
</li></ol>
</li></ol>

====10.3.5.5. Reserved====
====10.3.5.6. Reserved====
====10.3.5.7. Dead Valleys====

<ol>
<li>Dead valleys must be
<ol>
<li>waterproofed to conform to the requirements for membrane gutters (See [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]), and
<li>sloped at least 1:50 (2%, or 1/4” in 12”), to positively drain
<ol>
<li>into one or more roof drains{{hilite |, or || 2021-February-7 }}
<li>onto a lower ''water-shedding'' roof.
</li></ol>
</li></ol>
<li>{{hilite | Transitions from a dead valley to the metal panel system must conform to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]], and where a wall is present, a diverter shall be incorporated to protect the ''wall system''.|| 2021-February-7 }}.
</li></ol>

===10.3.6. Reserved===

===10.3.7. Intersections with Other Roof Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where two ''roof systems'' intersect, materials must be compatible with each other, or must be separated from contact by an intermediate separation layer.
</li></ol>

====10.3.7.2. Intersections with Waterproofing Roof Systems====

<ol>
<li>When a ''waterproofing roof system'' transitions down a slope onto a lower ''water-shedding roof system'', the ''waterproofing roof system'' membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the maximum water level,
<li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'', or
<li>304.8 mm (12”) plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'' or maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing roof system'' sheet membrane flashing on the slope must be mechanically secured, separately from the water-shedding ''roof system'',
<li>''underlayment'' must overlap the ''waterproofing roof system'' sheet membrane flashing by no less than 101.6 mm (4”),
<li>{{hilite |metal panels must overlap the ''waterproofing roof system'' sheet membrane flashing by at least 152.4 mm (6”) (A metal counter-flashing with an exposure of at least 101.6 mm (4”) is required at the bottom termination of the metal panels|| 2021-June-30}}), and
<li>fasteners for the ''water-shedding roof system'' must be at least 203.2 mm (8”) above the ''finished system surface'' of the ''waterproofing roof system'' (when measured vertically), or 304.8 mm (12”) for regions with heavy snow.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Intersections with Membrane Gutters====

<ol>
<li>Refer to the requirements in [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</li></ol>

===10.3.8. Reserved===

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=

==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary roof drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''roof assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a drain leader and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and
<li>{{hilite |which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.|| 2020-July-3 }}
</li></ol>
<li>''Primary roof drain'' means the primary means of draining water from the roof.
<li>''Roof drain'' means “A fitting or device that is installed in the roof to permit storm water to discharge into a ''leader''.” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("Scupper") means an open or closed roof drain that conveys water laterally from one roof area to another, or from the roof directly to the exterior of the building.
<li>''Secondary roof drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary roof drain''. An ''overflow drain'' is a type of ''secondary roof drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 15-year Guarantee''''' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
<li>The ''Design Authority'' is responsible for the design of roof drainage.
<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} {{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }} {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
<li>{{hilite |The size (flow rate) of roof drains and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }} {{hilite | (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location)|| 2027-February-1 }}.
<li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li>drain type, size, flow rate, and
<li>size and placement of the ''overflow drain''.
</ol></li>
<li>{{hilite |The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation) || 2021-October-23 }}
<ol>
<li>roof slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>{{hilite | the location of the ''drainage plane''|| 2021-October-30 }} {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished system surface'', {{hilite | and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design|| 2021-October-30 }}).
</li></ol>
<li>Roofs may drain off a roof edge, or by means of internal plumbing (both are permissible under the '''''RoofStar Guarantee Program''''').
<li>When a roof is designed to drain off an edge, water may drain freely, it may be diverted to a lower roof area, or it may be collected and diverted into a drainage system (plumbing) by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]).
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.
<li>When a roof is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow restrictor is present in an existing cast drain leader, the restrictor should be reinstalled.
</li></ol>

====11.1.3.2. Roof Drain Function and Location====

<ol>
<li>Roof drains must be used only for draining water.
<li>''Roof drains'' on new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>When existing ''roof drain'' and penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3.,"All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast-iron Roof Drains====

<ol>
<li>Only cast-iron roof drains, and existing external couplers used to connect drains to leaders, may be re-used for roof replacement ''projects''.
<li>Drain extensions for cast-iron roof drains should be avoided, since the connection with the cast drain is not sealed; the result is a leak into the roof system.
</li></ol>

====11.1.4.2. Scuppers and Overflows====
(See [[Notes to ASM Standard#A-11.1.4.2. | Note A-11.1.4.2.]])

<ol>
<li>A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}..
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the roof, in the event of ''primary roof drain'' failure.
<li>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be
<ol>
<li>located no higher than 101.6 mm (4”) above {{hilite | the ''drainage plane''|| 2021-October-30 }},
<li>situated so that they freely and visibly discharge storm water, and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====11.1.4.3. Membrane Gutters====
(See [[Notes to ASM Standard#A-11.1.4.3. | Note A-11.1.4.3.]])

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' {{hilite | (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) || 2023-June-16 }} only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>{{hilite | The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to|| 2020-July-3 }}
<ol>
<li>{{hilite | rainfall and snow load calculations for the building location|| 2020-July-3 }},
<li>{{hilite | drain type, size, and flow rate|| 2020-July-3 }}, and
<li>{{hilite | size and placement of the ''overflow drain''|| 2020-July-3 }}.
</li></ol>
<li>New membrane ''gutters'' shall be designed with a minimum width of 304.8 mm (12”) and a depth not exceeding the ''gutter’s'' width.
<li>At least 101.6 mm (4") clearance on the horizontal plane is required between any membrane ''gutter'' wall and the
<ol>
<li>the edge of the drain bowl for spun drains, and
<li>the edge of the drain leader for flat spun or welded drains.
</ol></li>
<li>Only fully-adhered membranes may be used in membrane ''gutters''.
<li>Metal ''gutter'' liners are permissible, provided they are designed to fit over acceptable waterproofing, and the liners conform to the material requirements in [[#11.2.1.3. Membrane Gutters and Gutter Liners | Article 11.2.1.3.]]
<li>''Conventionally insulated systems'' that drain into a membrane ''gutter'' must abut solid blocking at the ''gutter'' edge, which provides
<ol>
<li>a stop for the insulation ''assembly'', and
<li>a solid substrate for the securement of flashings and membranes.
</ol></li>
<li>An ''overflow drain'' must be located at least
<ol>
<li>101.6 mm (4”) above the primary membrane ''gutter'' drain, and
<li>25.4 mm (1”) below any mechanical fasteners used to secure the adjoining ''roof system''.
</ol></li>
<li>In roof replacement applications, existing membrane ''gutters'' may qualify for a '''''RoofStar Guarantee''''', but should be redesigned if their capacity is undersized, and must incorporate an overflow drain in keeping with the requirements in this Part.
<li>Where the primary drain in an existing membrane ''gutter'' is undersized for its capacity, the primary drain must be replaced with one that is properly sized.
<li>When a membrane ''gutter'' adjoins a RoofStar-guaranteed ''water-shedding system'', the transition from gutter to ''roof system'' shall conform to [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</ol></li>

====11.1.4.4. External Gutters====

<ol>
<li>{{hilite | External gutters and downspouts are not covered by the '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | Notwithstanding other requirements in this Part, when a roof drains onto another roof, the drainage of water must be controlled to eliminate or mitigate damage from water flow || 2021-June-22 }}; {{hilite | the use of splash pads, when appropriate for the location, is strongly recommended|| 2021-June-30 }}.
<li>{{hilite |Downspouts, installed by the ''Contractor'' or other trades and laid directly against the slope of the roof to connect an upper roof drainage to lower gutters, is acceptable under the '''''RoofStar Guarantee Program''''', provided the material is strongly secured both at the top and the bottom, and the issue of dissimilar metal corrosion can be eliminated|| 2021-June-30 }}.
</li></ol>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>{{hilite | Except for cast-iron roof drains, which are usually supplied and installed by others, only new drains and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>{{hilite | All roof drains and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''|| 2026-July-1 }}.
<li>Reuse of any penetration flashing or drain (except serviceable cast iron drains) is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]])|| 2021-February-5 }}.
<li>{{hilite | Where drains or overflows are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}.
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to ASM Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All roof drains
<ol>
<li>must be designed and manufactured for roof applications only, and shall not be floor drains, and
<li>shall be made so that the roof membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast-iron ''primary roof drains''
<ol>
<li>must be supplied with a sump receiver and under-deck clamp,
<li>should separate securement of the under-deck clamp and clamping ring from securement for the strainer, and
<li>{{hilite | must be installed by the trade supplying the roof drain. || 2023-June-16 }}
</li></ol>
<li>{{hilite | Cast-iron ''scupper drains'' must be || 2023-June-16 }}
<ol>
<li>{{hilite | supplied with a clamping strainer, || 2023-June-16 }} and
<li>{{hilite | designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable). || 2023-June-16 }}
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li> must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li> must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>should incorporate a clamping ring (a clamping ring is recommended for ''primary flanged insert drains'' specified on any ''project''), but clamping rings are required when ''primary flanged insert drains'' are specified for a '''''RoofStar 15-year Guarantee'''''.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that connect with plumbing inside the building|| 2026-July-1 }} (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that drain directly to the exterior of the building|| 2026-July-1 }} (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the drain to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the scupper,
<ol>
<li>equal in capacity to the main drain leader opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>{{hilite | must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but || 2026-July-1 }}
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>{{hilite | may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and|| 2026-July-1 }}
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.{{strike|, and || 2025-May-29 }}
</li></ol>
</li></ol>

====11.2.1.3. Membrane Gutters and Gutter Liners====

<ol>
<li>Membrane gutter membranes shall be
<ol>
<li>accepted by the '''''Guarantor''''',
<li>acceptable to the ''manufacturer'',
<li>compatible with the adjoining ''roof system'', and
<li>manufactured for full adhesion (semi-adhesion and mechanical securement are not permissible).
</ol></li>
<li>A reinforced liquid membrane systems (PMMA or PUMA) approved for field use and applied to an accepted SBS-modified base membrane is acceptable as a ''gutter'' membrane.
<li>A metal ''gutter'' liner
<ol>
<li>may be fabricated from
<ol>
<li>copper sheet material, incorporating soldered seams, or
<li>stainless steel, incorporating welded seams, and
</ol></li>
<li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</ol></li>
</ol></li>

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure the roof membrane and penetration flashings, or related accessories, must be
<ol>
<li>properly sized in accordance with ''roof system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>{{hilite | Only a RoofStar-accepted|| 2021-February-7 }} reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} liquid membrane flashing system may be used on the water plane to flash roof drains, scuppers, and overflows.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Roof Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Roof Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>Roof drains for new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The 304.8 mm (12”) spacing requirement for roof drains does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>Roof drains and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the drain.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All roof drains must be supplied and installed with a secured strainer to prevent debris from blocking the drain.
</ol></li>

====11.3.2.4. Membrane Flashing====

<ol>
<li>Drains must be flashed using the membrane specified and installed to waterproof a gutter, and shall be acceptable to the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} may be used on the ''drainage plane'' to flash roof drains, ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains and Membrane Gutters===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====
====11.3.3.2. General Requirements for Cast-iron Roof Drains====

<ol>
<li>Cast-iron roof drains must be installed by the plumbing/mechanical trade.
<li>When cast-iron roof drains are used, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain.
<li>Drain extensions for cast-iron roof drains should be avoided.
<li>Existing flow restrictors removed during roof construction should be reinstalled.
<li>All cast-iron roof drains must be
<ol>
<li>new or clean,
<li>unbroken (this applies to the clamping ring also), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The continuity of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast-iron Drains Installed with Lead Flashing====

<ol>
<li>Cast-iron roof drains installed with lead flashing shall conform to the requirements of Article 11.3.3.3. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.4. Cast-iron Drains Installed with Membrane Flashing====

<ol>
<li>Cast-iron roof drains installed with sheet membrane flashing shall conform to the requirements of Article 11.3.3.4. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Cast-iron roof drains retrofitting shall conform to the requirements of Article 11.3.3.5. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flange-type roof drain installation shall conform to the requirements of Article 11.3.3.6. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>''Scupper'' and ''overflow'' installation shall conform to the requirements of Article 11.3.3.7. in the Standard for the membrane used to waterproof their installation.
</li></ol>

====11.3.3.8. Membrane Gutters====

<ol>
<li>All ''gutter'' membrane construction shall conform to the requirements of Article 11.3.3.8. in the Standard for the membrane used in related waterproofing applications.
</ol></li>

====11.3.3.9. External Gutters====

<ol>
<li>When external gutters are attached to an Architectural Sheet Metal Roof System, they shall not interfere with the free movement of water or air away from the ''roof system''.
</ol></li>

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |be designed to utilize the split panel detail; flexible boot flashings secured with gasketed screws are not permitted|| 2022-February-5 }}, and
<li>{{hilite |specify two storm collars separated by no more than 76.2 mm (3”), for all penetration flashings that do not incorporate a settlement cap|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>{{hilite | Where a roof design includes openings through the ''roof assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall || 2024-June-15 }}
<ol>
<li>{{hilite | provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and || 2024-June-15 }}
<li>{{hilite | require a ''curb'' or an acceptable penetration flashing to enclose and seal each roof opening. || 2024-June-15 }} {{strike| must be enclosed and sealed with a ''curb'', or a penetration flashing || 2023-June-15 }}
</li></ol>
<li>{{hilite | Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others. || 2023-June-16 }}
<li>{{hilite | Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head|| 2020-July-3 }}.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration, and
<li>properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form a seal || 2023-January-25 }} {{hilite | around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2") || 2024-January-31 }}, or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration; the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>{{hilite | Cylindrical ("pipe-type") penetrations must be sealed with|| 2020-July-3 }}
<ol>
<li>{{hilite | the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,|| 2020-July-3 }}
<li>{{hilite | a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. "SBS" Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | 2-Part Retrofit Flashing (Cable Penetration)]])|| 2020-July-3 }}, or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Flexible boot flashings for pipe-type penetrations
<ol>
<li>may be used for penetrations up to 152.4 mm (6”) in diameter,
<li>should be located near the upper end of a slope for long panels,
<li>must not be located on the ''drainage plane'' when the roof slope is less than 1:6 (2” in 12”),
<li>must be located at or near the centre of metal roof panels, measured between the upstands, to avoid interference with standing seams or panel ribs, or in the alternative (when interference is unavoidable) on a raised panel above seam height,
<li>must be fastened with high-domed gasketed cladding screws placed no more than 38.1 mm (1-1/2") O.C., and
<li>must be set in a bed of sealant.
</li></ol>
</li></ol>

====12.1.3.2. Reserved====

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }}
<li>When a roof is replaced and existing penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, as specified in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</li></ol>

====12.1.3.4. Curbs and Sleepers====

<ol>
<li>The design and placement of curbs and sleepers shall be the responsibility of the ''Design Authority'', but shall in any event conform to the application requirements in [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]
<li>''Curbs''
<ol>
<li>must be designed for securement directly to the ''deck'' structure, or to intermediate blocking (they must not be situated on top of the ''roof system''), and
<li>shall be designed to achieve a minimum height of 203.2 mm (8”), measured from the surface of the ''drainage plane'' (not including panel seam upstands), or from the highest point of a ''curb cricket''.
</li></ol>
<li>''Curbs'' with a width
<ol>
<li>less than 914.4 mm (36”) may be designed with a ''cricket'' but require, as a minimum, a back-pan flashing,
<li>between 914.4 mm (36”) and 2438.4 mm (96") require an architectural metal ''cricket'' with rigid support, to prevent metal distortion, and
<li>greater than 2438.4 mm (96") must
<ol>
<li>be designed to divert and drain the anticipated volume of water above the ''curb'',
<li>incorporate a ''cricket'', fully supported with insulation or framing and designed to direct water and snow to either side of the ''curb'', and
<li>incorporate a waterproofed gutter membrane installed over the ''cricket'' (Also see [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3., ''Membrane Gutters'']]).
</li></ol>
</li></ol>
<li>A waterproofed gutter membrane around a ''curb''
<ol>
<li>shall have a minimum slope of 2%, along the up-slope face of the ''curb'', to direct water around the ''curb'' and toward the eaves,
<li>should be continuous along the sides of the ''curb'', as dictated by the ''curb'' size and roof slope, or fall, and
<li>must direct water onto the lower metal panels.
</li></ol>
<li>Equipment isolators are not considered part of the ''roof system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''Guarantee'''''.
</li></ol>

====12.1.3.5. Attic Ventilation====

<ol>
<li>{{hilite | See || 2027-February-1 }} [[#1.1.3.4. Ventilation |{{hilite | Article 1.1.3.4. "Ventilation" || 2027-February-1 }}]].
</li></ol>

{{strike| <ol>
<li>{{hilite | The design and selection of the ventilation system is the responsibility of the ''Design Authority'', and may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents,|| 2021-June-30 }}
<li>{{hilite | gable end vents,|| 2021-June-30 }}
<li>{{hilite | hip vents,|| 2021-June-30 }}
<li>{{hilite | static vents,|| 2021-June-30 }}
<li>{{hilite | ridge vents, and|| 2021-June-30 }}
<li>{{hilite | cupolas.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation|| 2021-June-30 }}
<ol>
<li>{{hilite | must meet the minimum requirements of the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]) (Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee''''')|| 2021-June-30 }}, and
<li>{{hilite | shall be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite |the slope of the roof|| 2021-June-30 }},
<li>{{hilite |the vented area|| 2021-June-30 }}, and
<li>{{hilite |the design and configuration of the roof structure|| 2021-June-30 }}, and
</li></ol>
<li>{{hilite | shall be provided for roofs over cathedral ceilings.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | are acceptable and are recommended for all areas with vaulted ceilings|| 2021-June-30}}.
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
</li></ol> || 2026-January-27 }}

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed to metal panels and should be designed for attachment to vertical surfaces only.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>{{hilite | See [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] for sheet membrane requirements.|| 2021-June-30 }}
<li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm.
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>{{hilite | manufactured from sheet metal conforming to the material requirements in || 2023-June-16 }} [[#Section 13.2. Materials | Section 13.2.]], {{hilite | when the flashing is custom-made or fabricated by the ''Contractor'', || 2023-June-16 }}
<li>{{hilite | compatible with the ''roof system'', || 2023-June-16 }}
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>{{hilite | of sufficient height to extend vertically (when measured from the up-slope base of the flashing upstand to the opening at the top) at least || 2022-October-22 }}
<ol>
<li>{{hilite | 203.2 mm (8”), for slopes 0 to 1:6 (2” in 12”) || 2022-October-22 }},
<li>{{hilite | 152.4 mm (6”), for slopes greater than 1:6 and equal to 1:3 (4” in 12”) || 2022-October-22 }}, or
<li>{{hilite | 101.6 mm (4”), for slopes greater than 1:3 || 2022-October-22 }}.
</li></ol>
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
<li>{{hilite | plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer. || 2023-June-16}}
</li></ol>
<li>{{hilite | In regions that experience high snow accumulations, penetration flashings taller than the stated minimums in this Article are strongly recommended || 2022-October-22 }}.
<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} {{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }} {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>{{hilite | must slope downward from the penetration approximately 45°,|| 2021-June-30 }}
<li>{{hilite | shall be at least 50.8 mm (2”) wide|| 2021-June-30 }},
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
<ol>
<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
</li></ol>
<li>{{hilite | Chimney chase caps must be || 2021-June-30 }}
<ol>
<li>{{hilite | galvanized metal conforming to the requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]|| 2021-June-30 }},
<li>{{hilite | fabricated with penetration collars at least 152.4 mm (6") in height|| 2021-October-30 }},
<li>{{hilite | soldered at all joints in the ''drainage plane''|| 2021-June-30 }}, and
<li>{{hilite | fabricated with slope to shed water|| 2021-June-30 }}.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing Systems Penetrations====

<ol>
<li>{{hilite | Lead plumbing vent flashings must each be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated with sheet lead material weighing no less than 14.65 Kg/m2 (3lb/sf)|| 2021-June-30 }},
<li>{{hilite | properly sized for the pipe|| 2021-June-30 }}, and
<li>{{hilite | supplied with a settlement cap made from the same materials (the inside collar of the settlement cap must fit vertically inside the pipe opening by at least 25.4 mm (1”))|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be|| 2021-June-30 }}
<ol>
<li>properly sized for the penetration, both in diameter and height,
<li>flexible or sloped to suit the roof slope, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Air Vents====
{{hilite | (See [[#Article 1.1.3.4. Ventilation | Article 1.1.3.4., "Ventilation"]]) || 2027-February-1 }}

<ol>
<li>{{hilite | Vents, regardless of their type, must be either|| 2021-June-30 }}
<ol>
<li>{{hilite | proprietary to, or privately labeled for, the panel manufacturer, or|| 2021-June-30 }}
<li>{{hilite | specifically accepted by the '''''RoofStar Guarantee Program''''' (See [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ridge vents must be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated from a compatible metal|| 2021-June-30 }},
<li>{{hilite | acceptable to the metal panel manufacturer|| 2021-June-30 }},
<li>{{hilite | suitable for slopes 1:4 and greater|| 2021-June-30 }}, and
<li>{{hilite | constructed with internal baffles to prohibit the intrusion of|| 2021-June-30 }}
<ol>
<li>{{hilite | insects|| 2021-June-30 }},
<li>{{hilite | vermin|| 2021-June-30 }},
<li>{{hilite | snow|| 2021-June-30 }}, and
<li>{{hilite | debris|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Natural air flow vents must be
<ol>
<li>Type B or C ventilators conforming to CAN3-A93-M82 (R2003), "Natural Airflow Ventilator for Buildings", and permanently marked with the standard number,
<li>tested by an accredited third party to verify compliance with the required Standard,
<li>fabricated from plastic or corrosion-resistant metal (painted or unfinished), and
<li>manufactured with a base flange that measures
<ol>
<li>at least 76.2 mm (3”) wide on the up-slope side of the flashing, or
<li>at least 50.8 mm (2”) along the vertical sides, and along the bottom side of the flashing.
</li></ol>
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |incorporate only the split panel detail for flashing penetrations (use of a flexible boot flashing secured with gasketed screws is not permitted)|| 2022-February-5 }}, and
<li>{{hilite |incorporate no fewer than two storm collars for each penetration flashing that does not include a settlement cap; each collar must be separated from the other by no more than 76.2 mm (3”)|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}====

<ol>
<li>All penetration flashing materials must be new.
<li>All penetrations must be flashed to seal the penetration where it passes through the deck and underlayment and must prevent water ingress at least 203.2 mm (8") above the ''finished system surface''.
<li>{{hilite | Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing|| 2021-June-30 }}
<ol>
<li>{{hilite | must be suitable for the slope and penetration|| 2021-June-30 }}, and
<li>{{hilite | must be properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form or permit a seal || 2023-January-26 }} around the penetration {{hilite | to permit a seal|| 2024-January-31 }}|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All penetration flashings suitable for application on an architectural metal panel ''roof system'' || 2026-February-1 }}
<ol>
<li>{{hilite | must be secured to the metal panel system with mechanical fasteners|| 2026-February-1 }},
<li>{{hilite | shall maintain a drainage space around all sides of at least 12.7 mm (1/2”) and shall not impede the flow of water along a panel|| 2026-February-1 }},
<li>{{hilite | shall be oriented to promote positive drainage, and|| 2026-February-1 }}
<li>{{hilite | shall be sealed to the panel or to split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for split pan requirements) with an acceptable sealant applied to both the underside of a flange and around its edges|| 2026-February-1 }}.
</li></ol>
<li>A flexible boot flashing {{hilite | may be|| 2026-February-1 }} used with cylindrical penetration {{strike| is permissible || 2025-February-1 }}, provided
<ol>
<li>the flexible boot flashing
<ol>
<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
<li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
<li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,
<li>is fastened with gasketed screws spaced no more than 38.1 mm (1-1/2") O.C.,
<li>is secured around the penetration with a stainless-steel clamping ring{{hilite |, but when a clamping ring cannot be installed, the top of the flashing must be protected with a caulked, galvanized storm collar|| 2021-October-30 }}, and
<li>is sealed around the penetration joint with a bead of sealant
</li></ol>
<li>{{hilite | the penetration is fitted with a properly sized and caulked galvanized storm collar|| 2021-June-30 }}, and
<li>{{hilite | the plumbing trade (for new construction only) ensures|| 2021-June-30 }}
<ol>
<li>{{hilite | the flashing is not distorted|| 2021-June-30 }}, and
<li>{{hilite | a storm collar is securely fitted and caulked with sealant|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>{{hilite | Plastic flashings, vents, and related fittings shall not be used on an architectural sheet metal roof|| 2026-February-1 }}.
<li>A cylindrical penetration flashing (i.e., for a pipe)
<ol>
<li>with a maximum opening diameter equal to or less than 152.4 mm (6”) may be installed on a curb, but shall in any case be flashed with a flexible boot flashing, or with a rigid metal pipe flashing.
<li>with a maximum opening diameter greater than 152.4 mm (6”), and all exhaust flues (B-vents), may not be flashed at the ''drainage plane'' and instead must be installed on a curb (see [http://rpm.rcabc.org/index.php?title=ASM_11.2.1_Curb,_Split_Panel ASM 11.2.1 Curb, Split Panel]).
</li></ol>
<li>{{hilite | When a cylindrical penetration extends above the top edge of its flashing so that it cannot be sealed with a settlement cap, the penetration must be fitted with at least one properly fitted, level, galvanized clamping storm collar placed immediately above the top opening of the flashing.|| 2021-June-30 }}
<li>{{hilite | All installed storm collars must be sealed with a continuous, untooled bead of acceptable sealant at least 9.53 mm (3/8”) wide, applied to and centered over the joint between the collar and the penetration|| 2020-July-3 }}.
<li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head), or
<li>a curb waterproofed with sheet membrane and flashed with sheet metal, and fitted with a customized sheet metal hood (shaped to function like a weather head).
</li></ol>
<li>Cables passing through a penetration flashing should be drooped, and horizontal pipes should be fitted with a capillary-breaking collar, to prevent water from tracking along the cable or pipe, into the building; {{hilite | water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | Where a purpose-made flashing does not fit the penetration (i.e., a penetration that is a square post), or when a penetration extends above the top edge of the flashing so that it cannot be enclosed with a cap or protected with a storm collar {{hilite | {{strike| (Ref. Figure 12.3.2.-A)|| 2025-February-1 }}{{hilite | (See '''Figure 12.3.2.1.-A''')|| 2026-February-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}|| 2020-July-3 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of {{hilite |semi-cured EPDM (or its equivalent)|| 2020-July-3 }},
<ol>
<li>{{hilite | loosely wrapped around the penetration and the flashing at least 1-1/2 times, or adhered to itself and overlapped at least 50.8 mm (2") ||2021-February-7 }},
<li>{{hilite | installed free of wrinkles or fish-mouths ||2021-February-7 }},
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>{{hilite | clamped at the top and at the bottom using stainless steel clamps set back from the membrane edge no more than 6.35 mm (1/4") ||2021-February-7 }}, or
</ol></li>
<li>with {{hilite | heat- ||2021-February-7 }}shrink tubing that
<ol>
<li>{{hilite | {{hilite | extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2") ||2021-February-7 }},
<li>is secured with stainless steel mechanical clamps installed at each end of the tubing, and
<li>{{hilite | is caulked with an acceptable sealant (when adhesive-lined heat-shrink tubing is used, the sealant may be omitted). || 2023-October-28 }}
</ol></li>
</ol></li>
<li>{{hilite | Unshielded flexible mechanical ("MJ") couplings || 2024-January-31 }}
<ol>
<li>{{hilite | shall be clamped to the penetration and its flashing, and sealed along the top edge with an acceptable sealant, and || 2024-January-31 }}
<li>{{hilite | are suitable for use only with penetrations that will not expand, contract, or move with anticipated building settlement, i.e., fall protection anchors. || 2024-January-31 }}
</ol></li>
<li>{{hilite | Chimney chase caps that are included in the scope of roofing work|| 2021-October-30 }}
<ol>
<li>{{hilite | shall be fabricated to meet the requirements set out in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]|| 2021-October-30 }},
<li>{{hilite | must be fully supported beneath the flashing|| 2021-October-30 }},
<li>{{hilite | must be waterproofed beneath the cap flashing with a RoofStar-accepted self-adhered eave protection membrane installed according to the membrane manufacturer’s written instructions (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]])|| 2021-October-30 }}, and
<li>{{hilite | shall be sealed at the penetration collars with the waterproofing membrane|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Cylindrical penetrations through chimney chase caps that form part of the roofing work must be fitted with a properly sized galvanized storm collar, caulked with sealant|| 2021-October-30 }}.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.1.-A Alternate Flashing of Pipe Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.1.(14) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.1.3.1-A (B).png | link=https://rpm.rcabc.org/images/4/49/Figure_12.1.3.1-A_%28B%29.png | 400 px]]
|}

====12.3.2.2. Reserved====
====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16}}
<li>{{hilite | Penetrations that are closer together than the allowable minimum distance must be supported by a written Variance issued by the '''''Guarantor'''''. || 2023-June-16 }}
</li></ol>

====12.3.2.4. Curbs and Sleepers====

<ol>
<li>All ''curb'' flashing shall be constructed on a split pan and affixed to the pan with blind rivets.
<li>Split pans must be
<ol>
<li>secured to the roof structure, and to adjacent panels, with cleats that are fashioned from compatible metal and fastened to the structure with screws.
<li>hooked to the cleats, and to adjacent roof panels, shingle fashion with positive laps, and
<li>sealed at each lap with two parallel untooled beads of sealant.
</li></ol>
<li>{{hilite | All curbs or penetrations that can be flashed with sheet membrane shall, regardless of their geometry, be flashed with a high-temperature rated membrane which must positively lap field underlayment, and must be carried|| 2026-February-1 }}
<ol>
<li>{{hilite | at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies)|| 2026-February-1 }},
<li>{{hilite | no higher than the top of a flexible boot penetration|| 2026-February-1 }},
<li>{{hilite | to the top inside edge of curbs, and|| 2026-February-1 }}
<li>{{hilite | onto field by at least 152.4 mm (6”)|| 2026-February-1 }}.
</li></ol>
{{strike| <li>All ''curbs'' must be fully flashed with the same membrane used for eave protection and valleys, and must extend to the top of the ''curb''. || 2025-February-1 }}
<li>Where possible, membrane flashing should extend across the top of the ''curb'' and terminate on the vertical inside face.
<li>{{hilite | Skylights installed on ''curbs'' meeting the minimum height requirements (see [[#12.1.3.4. Curbs and Sleepers | Article 12.1.3.4.]]) must be waterproofed with membrane and flashed with sheet metal in keeping with the requirements for ''curbs''|| 2021-June-30 }}.
<li>{{hilite | Skylights with proprietary ''curbs'', regardless of their height, must be sealed to the ''roof deck'' following the requirements for penetration and vent flashings|| 2021-June-30 }}.
<li>Back pan membrane flashing must extend
<ol>
<li>at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies),
<li>to the top inside edge of ''curbs'',
<li>914.4 mm (36") up the slope from the ''curb'' transition, and
<li>onto the field, past the ''curb'' at least 152.4 mm (6”).
</li></ol>
<li>Back-pan metal flashings for curbs up to 914.4 mm (36”) in width must extend
<ol>
<li>past the edges of a ''curb'' by 101.6 mm (4”) but project no closer to the adjacent seam than 51 mm (2”), and
<li>up the slope beneath the metal panels, to a point at least 150 mm (6”) (when measured vertically) from the base of the ''curb''.
</li></ol>
<li>''Curbs'' with widths 914.4 mm (36”) to 2438.4 mm (96") must be constructed with a metal ''cricket''
<ol>
<li>that is supported by rigid material to prevent metal distortion,
<li>that is integrated with the ''curb'' flashing panels,
<li>that extends up-slope from the back of the ''curb'', beneath the metal panels to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>fabricated with flanges that lap under the metal ''curb'' flashing at least 50.8 mm (2”), and
<li>that is closed at all seams, using
<ol>
<li>welds, or
<li>blind rivets, incorporating two beads/rows of sealant.
</li></ol>
</li></ol>
<li>Waterproofed gutter membranes for ''curbs'' wider than 2438.4 mm (96") must slope toward the eaves at least 2%, and shall
<ol>
<li>extend up the slope at the back of the ''curb'', beneath the metal panels, to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>extend horizontally from the ''curb'' at least 254 mm (10”), to the nearest metal panel upstand,
<li>lap continuously on either side of the ''curb'', and onto the down-slope metal panels, and
<li>extend a minimum of 152.4 mm (6") over the lower metal roof panels, measured from the back pan.
</li></ol>
<li>Fasteners for metal panels installed above the back of the ''curb'' must be placed 101.6 mm (4") or more above the curb base, when measured vertically.
</li></ol>

====12.3.2.5. Air Vents====

<ol>
<li>Air vents
<ol>
<li>{{hilite | shall be installed on a curb, using the split pan method (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements) || 2027-February-1 }},
<li>{{hilite | shall be installed within 609.6 mm (24”) of a ridge, and evenly spaced along the ridgeline, and || 2027-February-1 }}
<li>{{hilite | must be installed on only one side of a ridge or hip line (vents installed on opposite or adjacent sides of a roof plane will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
</li></ol>

{{strike| <ol>
<li>{{hilite |Air vents shall be installed in keeping with the requirements in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]]|| 2021-June-30 }}
</li></ol> || 2026-January-27 }}

====12.3.2.6. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]], and
<ol>
<li>may be used
<ol>
<li>{{hilite | on the ''drainage plane''|| 2021-February-7 }},
<li>where sheet membrane flashing may not be practical or even possible,
<li>{{hilite | to terminate the top edge|| 2021-February-7 }} of sheet membrane flashing,
<li>{{hilite | for sheet membrane reinforcement (i.e., at corners)|| 2021-February-7 }},
<li>{{hilite | where abrasion resistance is desirable|| 2021-February-7 }},
<li>{{hilite | where resistance to contamination of sheet membrane is necessary|| 2021-February-7 }}, or
<li>{{hilite | where the ''Design Authority'' specifies its application. || 2023-June-16 }}
</ol></li>
<li>must be compatible with the primary sheet membrane flashing,
<li>shall be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, all as required by the ''manufacturer'' in their published instructions,
<li>must be applied within masked boundaries to produce clean, straight, plumb edges, and
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece {{hilite | is cut to|| 2021-February-7 }} cover the masked area, to within 3.78 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") (See {{hilite | '''Figure 12.3.2.6.-A''' || 2026-February-1 }}).
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane.
<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing ''system''|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>{{hilite | may be used|| 2021-February-7 }}
<ol>
<li>{{hilite | to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]]|| 2021-February-7 }},
<li>{{hilite | to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes|| 2021-February-7 }}, or
<li>{{hilite | to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]])|| 2021-February-7 }}.
</ol></li>
<li>{{hilite | must not be used in the ''drainage plane'', or to reinforce membranes against abrasion|| 2021-February-7 }},
<li>{{hilite | must be applied in two cured coats, unless otherwise permitted in this Standard|| 2021-February-7 }}, and
<li>{{hilite | must be fleece-reinforced between coats where|| 2021-February-7 }}
<ol>
<li>{{hilite | the application is considered permanent, || 2023-June-16 }}
<li>{{hilite | a change in plane (angle) occurs|| 2021-February-7 }}, or
<li>{{hilite | there is a joint between two supports and the liquid membrane must serve as a bridge|| 2021-February-7 }}.
</ol></li>
</ol></li>
<li>{{hilite | Accessory PMMA detailing products|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>{{hilite | must be|| 2021-October-30 }} reinforced with chopped or loose fibres,
<li>{{hilite | shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted|| 2021-February-7 }},
<li>{{hilite | must be used at locations 101.6 mm (4”) or more above the ''drainage plane''|| 2021-February-7 }}, {{hilite | except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system|| 2021-October-30 }}, and
<li>{{hilite | must not be used where movement is expected|| 2021-February-7 }}.
</ol></li>
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Acceptable Application of 2-Component PMMA Around Roof Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.6.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg | link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of walls must be located at least 88.9 mm (3-1/2") above the ''drainage plane''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''roof assembly'' (i.e., on top of a parapet) shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
</li></ol>

====12.3.2.8. Reserved====

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>{{hilite | ''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counter-flashing (also see the Glossary for a colloquial use of the term). || 2023-June-16 }}
<li>{{hilite | ''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge"). || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the ''Architectural Sheet Metal Manual'' published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>{{hilite | Design drawings must detail metal flashing profiles desired for the ''project''|| 2021-June-30 }}.
<li>{{hilite | Roof materials that are UV-sensitive must be protected with metal flashings|| 2021-June-30 }}.
<li>{{hilite | Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the design specifications for ''linear metal flashing'' shall conform to the design requirements in the applicable ''waterproofing roof system'' Standard|| 2021-June-30 }}.
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 24-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
<li>{{hilite | Except for metal valley flashings (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]), ''linear metal flashings'' may be overlapped rather than seamed; each overlap must be no less than|| 2021-June-30 }}
<ol>
<li>{{hilite | 101.6 mm (4”) when fully caulked in the lap|| 2021-June-30 }}, or
<li>{{hilite | 152.4 mm (6”) when installed without caulking in the lap|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Sealants used in exposed locations must be tooled to positively shed water|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-A Minimum Required Gauge and Length for Pre-finished Galvanized Steel Cap (Coping) Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Horizontal Span !! style="width:50px;" | Minimum Slope !! style="width:50px;" | Gauge !! style="width:150px;" | Maximum Flashing Segment Length !! style="width:200px;" | Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 300 - 900 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 900 mm or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|}
::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-B Minimum Required Gauge and Length for Pre-finished Galvanized Steel Vertical Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Vertical Face !! style="width:50px;" | Gauge !! style="width:175px;" | Segment Length !! style="width:250px;" | Vertical Seam Options
|-
| Up to 152.4 mm (6") || 24 || 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || 3048 mm (120") || Butt Seams*
|}

::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]]).
<li>{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}{{hilite | (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
</li></ol>

====13.1.3.6. Cap and Counter-flashing====

<ol>
<li>{{hilite | Cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the design requirements in the applicable ''waterproofing roof system'' or gutter membrane Standard || 2023-June-16 }}.
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Refer to [[#10.3.7.2. Intersections with Waterproofing Roof | Article 10.3.7.2.]]
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>{{hilite | ''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.|| 2022-February-5 }}
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>{{hilite | When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below|| 2026-July-1 }}.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ''ASTM A653'' / ''A653M-06'' CS Type B, Z275 (G90) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel {{hilite | Grade 304|| 2026-July-1 }}''': {{hilite | minimum 0.38 mm (0.014", 28-gauge)|| 2026-July-1 }} stainless steel, Grade {{strike| Type 302, || 2025-June-3 }} 304, {{strike| 316, 2B finish to ASTM A167-82 || 2025-June-3 }} {{hilite | conforming to ASTM {{strike| A167-82 || 2025-June-3 }} A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet {{hilite | (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2) | {{hilite | Note A-13.2.1.2.(3)(2)]]) || 2026-July-1 }}.
<li>{{hilite | '''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge)) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. || 2026-July-1 }}
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ''ASTM A792''/''A792M-06'' CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Stainless Steel''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Type 302, 304, 316, 2B finish to ''ASTM A167-82''. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ''ASTM B370-81''. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard ''EN 988-1996''. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards.
<li>{{hilite | Where a ''waterproofing system'' adjoins and Architectural Sheet Metal System, ''linear metal flashings'' must be fabricated from 24-gauge steel stock|| 2021-June-30 }}.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>{{hilite | threaded screws, {{hilite | friction-type pins (i.e., for masonry or concrete), plug (inserts), || 2024-January-31 }}or rivets (where permitted), || 2023-October-28 }}
<li>{{hilite | compatible with materials they contact, || 2023-October-28 }}
<li>{{hilite | corrosion-resistant, || 2023-October-28}}
<li>{{hilite | identified in the engineered design, when part of the roof system’s wind resistance calculations (Ref. Article 3.1.3.3., “Resistance to Specified Wind Loads”), || 2023-October-28 }}
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>{{hilite | Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings || 2023-October-28 }}
<ol>
<li>{{hilite | in concealed locations must be at least No. 8 (larger if required by the engineered design), with a low-profile head. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10. (larger if required by the engineered design), shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.|| 2023-October-28 }}
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to any one of the following:
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”.
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”.
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”.
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted otherwise, all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
<li>Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the fabrication of ''linear metal flashing'' shall conform to the requirements in the applicable ''waterproofing roof system'' Standard.
<li>Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break.
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed,
<li>shall conform to the minimum requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }},
<li>shall incorporate seams conforming to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }}, and
<li>may not exceed the maximum length of 3048 mm (120").
</ol></li>
<li>{{hilite |The vertical leg of any metal flashing that overlaps roofing material must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break|| 2021-June-30 }}.
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems''),
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.1.3. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous {{hilite | or butyl-based || 2026-February-1 }} membrane used as eave protection in a ''water-shedding roof system'') (Ref. [[#Section 8.2. Materials | Section 8.2.]]).
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}
<ol>
<li>{{hilite | shall conform to the fasteners requirements in || 2024-January-31 }} [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>{{hilite | shall be firmly fastened, without distorting secured materials, || 2024-January-31 }}
<li>{{hilite | must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate || 2024-January-31 }} {{strike| must penetrate the substrate as specified in [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]], and || 2023-January-26 }}
<ol>
<li>{{hilite | through the back surface of steel framing at least 19.05 mm (3/4"), || 2024-January-31 }}
<li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
<li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
{{strike| <li>Where hidden metal clips are required, they must
<ol>
<li>be at least 24-gauge,
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 76.2 mm (3") from the bottom edge (hook), and
<li>engage drip or safety edges by a minimum of 12.7 mm (1/2").
</li></ol>
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centred between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol> || 2023-January-26 }}
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the roof side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing|| 2022-February-5 }}.
<li>{{hilite | All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article|| 2022-February-5 }}.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ({{hilite | '''Figure 13.3.2.2.-A''' || 2026-February-1 }}) or S-lock ({{hilite | '''Figure 13.3.2.S.-B''' || 2026-February-1 }} (Single) and {{hilite | '''Figure 13.3.2.S.-C''' || 2026-February-1 }} (Double)), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }},
<li>{{hilite | continuous eave flashing to which the metal panels are secured || 2023-June-16 }}, or
<li>{{hilite | the vertical face of any flashing that is concealed by a ''wall assembly'', counter-flashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap|| 2021-October-30 }}
<ol>
<li>{{hilite | is no less than 101.6 mm (4”) when fully caulked in the lap|| 2021-October-30 }}, or
<li>{{hilite | is no less than 152.4 mm (6”) when installed without caulking in the lap.|| 2021-October-30 }}
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (closed with a "rat tail").
<li>When the face of vertically-oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically-oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See {{hilite | '''Figure 13.2.2.2.-A''' || 2026-February-1 }}) must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>
<li>'''S-locked seams''' ({{hilite | '''Figures 13.2.2.2.-B''' || 2026-February-1 }} and {{hilite | '''13.2.2.2.-C''' || 2026-February-1 }}) must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
<li>'''Flat butt seams'''
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
<li>The saddle for flat butt seams must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-A''' '''Mechanical Locking Standing Seam''' Forming Part of Sentence 13.2.2.2.(11) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-B''' '''Single S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-C''' '''Double S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]] || [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 300 px]] || [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]]
|}

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | The installation of cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the application requirements in the applicable ''waterproofing roof system'' Standard || 2023-June-16 }}.
</li></ol>

<hr>
<div id=PART_14></div>

={{hilite | Part 14 - The Roof as a Platform || 2023-June-16}}=
==Section 14.1. Design==
===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. {{strike| Definitions || 2024-December-23 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. RoofStar 15-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any covering, amenity space, structure or live loads superimposed upon the ''roof system''.
</li></ol>

====14.1.3.3. Securement of Supported Structures and Equipment====

<ol>
<li>The ''Design Authority'' is responsible to specify the appropriate securement design of roof coverings, structures, and equipment, to resist ''Specified Wind Loads''.
<li>Where structural securement is desirable or required, the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12,"Penetrations and Curbs"]], and [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]).
</li></ol>

====14.1.3.4. Snow Guards====

<ol>
<li>While snow guards are not part of the ''roof system'', snow guards
<ol>
<li>must not penetrate the metal ''roof system'', and
<li>shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>The decision to use snow guards, and their selection, is the responsibility of the ''Design Authority'' and neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the roof ''system'' caused by the use or absence of snow guards.
</li></ol>

====14.1.3.5. Photovoltaic Panels====

<ol>
<li>Photovoltaic panels are considered "equipment" within the definitions used in this Standard, are not part of the ''roof system'', and therefore photovoltaic panels
<ol>
<li>must not penetrate the metal ''roof system'', and
shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>All electrical connections, distribution cables, and related systems that penetrate the ''roof system'' must be flashed with purpose-made flashings incorporating weather-head fittings (see [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]; see also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., ''Electrical Cables and Boxes'']]).
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to ASM Standard | Notes to Standard]]=

</div>
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[[RCABC Roofing Practices Manual | Home]]
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{{Template:RPM Page Footer with Copyright and Current Date}}

(Draft) ASM Roof Systems Standard

2026-06-22T16:43:34Z

James Klassen: /* 9.1.3.1. General Requirements */

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<big><big>Division B - Standards</big></big> 
<big>Water-shedding Roof Systems: Metals</big> 
<hr>
<big><big><big><big><big>RGC Standard for Architectural Sheet Metal (ASM) Roofs</big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
{{hilite | This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for Architectural Metal Roofing (Tab 8). It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''', '''''RoofStar 10-Year Guarantee''''' or '''''RoofStar 15-year Guarantee'''''. Requirements to qualify for a '''''RoofStar 15-Year Guarantee''''' are listed in each relevant Part under Section 1. All '''''RoofStar 15-Year Guarantee''''' requirements must be read together with the General Requirements for each Part in this Standard. || 2020-July-3 }}

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. {{hilite |Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.|| 2021-February-7 }}

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the {{hilite | hyperlinks embedded || 2020-July-3 }} in the body of text.

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:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Roof Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Eave, Valley, and Field Underlayment]]
|-
| [[#PART_9 | Part 9 - Roof Field (Panel Systems)]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - The Roof as a Platform]]
|-
| <hr>
|-
| [[Notes to ASM Standard | Notes to Standard]]
|-
|}

</div>
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<hr>
<div style="text-align:center">
'''First Edition''': June 14, 2018
 '''Previous Edition''': June 12, 2025
 '''Current Edition''': Adopted January 20, 2026
 
All changes to this Standard are effective <big>'''February 1, 2026'''</big>
</div>
<div style="text-align:center">
{{Template:RPM Page Footer with Copyright and Current Date}}
</div>
</div>
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</div>

<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>{{hilite | ''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''|| 2027-June-11 }}.
{{strike| {{hilite |''Finished roof system surface''|| 2020-February-3 }} {{hilite | means the top surface of any ''roof system'', inclusive of ballast or ''overburden''|| 2021-February-7 }}. || 2026-June-11 }}
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>{{hilite | ''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''|| 2027-June-11 }}.
{{strike| {{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.|| 2026-June-11 }}
<li>{{hilite | ''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''. || 2023-June-16 }}
<li>{{hilite | ''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy || 2025-October-25 }}.
<li>{{hilite | ''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure|| 2027-June-11 }}.
{{strike| ''Waterproofing roof system'' means an insulated or uninsulated ''roof system'', designed and constructed on roofs using a sheet or liquid-applied membrane, to exclude water. This type of ''system'' typically is installed on roof slopes less than 1:4 (3” in 12”). || 2026-June-11 }}
<li>''Water-shedding roof system'' means an insulated or uninsulated ''roof system'', designed and constructed to shed water away from a structure, not to waterproof it. This type of ''system'' typically is installed on roof slopes greater than 1:4 (3” in 12”) but may be installed on slopes as low as 1:6 (2" in 12").
</li></ol>
</li></ol>

===={{hilite | 1.1.1.5. Reserved || 2026-February-1 }}====

===={{hilite | 1.1.1.6. Objectives || 2026-February-1 }}====

<ol>
<li>Every ''roof system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.7. Responsibility for Design || 2026-February-1 }}====

<ol>
<li>Each design of a ''roof system'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

===={{hilite | 1.1.1.8. Pre-Design Requirements || 2026-February-1 }}====
<ol>
<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''roof assembly''.
<li>{{hilite | When any element of a ''roof system'' for a pre-fabricated building or building assembly is or will be installed off site , the ''Design Authority'' must consult with the '''''RGC''''' directly concerning '''''RoofStar Guarantee''''' coverage and wind load design (for further reference, see || 2027-February-1 }} [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee {{hilite | Article 3.2.1.2. || 2027-January-16 }}] {{hilite | in Division A of the ''Manual'' || 2027-February-1 }}.
</li></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2026-February-1 }}====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''roof assembly'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and the roof class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''roof assembly'',
<li>the potential effects of reflected heat on the ''roof assembly'',
<li>''roof system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>{{hilite | In addition to Sentence (1), all ''projects'' shall comply with || 2024-October-20 }}
<ol>
<li>{{hilite | the ''project'' specifications and drawings, and || 2024-October-20 }}
<li>{{hilite | the ''manufacturer's'' published installation requirements || 2024-October-20 }}.
</li></ol>
</li></ol>

====1.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>{{hilite | To qualify for a '''''RoofStar 15-year Guarantee''''', each ''project'' must be designed and constructed in compliance with the requirements published in this Standard, including the following standards which are linked to their referenced Parts || 2022-February-5 }}:
<ol>
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is mandatory ([[#2.1.2.2. RoofStar 15-Year Guarantee |Article 2.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | Only panels with a hidden clip securement system may be used to qualify for a '''''RoofStar 15-year Guarantee'''''. Flange-fastened panels are not permitted ([[#9.1.2.2. RoofStar 15-Year Guarantee |Article 9.1.2.2.]]) || 2022-February-5 }}.
<li>{{hilite | All penetrations must be flashed by using the split panel detail; flexible boot flashings secured with gasketed screws are not permitted ([[#12.1.2.2. RoofStar 15-Year Guarantee |Article 12.1.2.2.]])|| 2022-February-5 }}.
<li>{{hilite | All penetration flashings that do not incorporate a settlement cap must be fitted with two storm collars separated by no more than 75 mm (3”), and each storm collar must be sealed with an untooled bead of sealant [[#12.1.2.2. RoofStar 15-Year Guarantee | Article 12.1.2.2.]]|| 2022-February-5 }}
</li></ol>
</li></ol>

===={{hilite | 1.1.2.3. Quality Control || 2026-February-1 }}====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''roof assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for projects further away than 100 km),
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

===={{hilite | 1.1.2.4. Quality Assurance || 2026-February-1 }}====
(See [[Notes to ASM Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2026-February-1 }}]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''roof system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of roofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Roof Systems====
(See [[Notes to ASM Standard#A-1.1.3.1.| Note A-1.1.3.1.]])

<ol>
<li>{{hilite | This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as || 2023-June-16 }}
<ol>
<li>{{hilite | uninsulated ''systems'' in which metal panels are secured directly to the ''roof deck'' or an overlay, and || 2023-June-16 }}
<li>{{hilite | insulated ''systems'', in which metal panels are installed above insulation and other roof system materials, and|| 2023-June-16 }} {{hilite | should be secured to the ''roof deck'' using means and methods that reduce thermal bridging (e.g., thermally non-conductive clips, girts, or bearing plates) || 2027-February-1 }}{{hilite | (See|| 2027-February-1 }}[[#7.1.3.4. Thermal Resistance and Layering |{{hilite | Article 7.1.3.4., ||2027-February-1 }}]]{{hilite |Sentence (4) and|| 2027-February-1 }}[[Notes to ASM Standard#A-1.1.3.1.|{{hilite | Note A-7.1.3.4.)|| 2027-February-1 }}]].
</li></ol>
<li>Architectural metal roofing systems accepted for use in the '''''RoofStar Guarantee Program''''' must be roll-formed hydrokinetic (water-shedding) systems commonly installed over solid roof ''decks'' or rigid insulation panels, but may also be intermittently supported when engineered to resist anticipated live loads (metal panels designed for use as structural (spanning member) systems are accepted for a '''''RoofStar Guarantee''''' only as an architectural metal panel system).
</li></ol>

===={{hilite | 1.1.3.2. Accessibility for Maintenance || 2026-February-1 }}====

<ol>
<li><div class="recommended">All roofs with a field elevation greater than 7620 mm (25’) above grade should incorporate access to the roof by stairs and a doorway, or with a properly located roof hatch.
<li>Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, in a manner consistent with worker safety regulations, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations''.
</li></ol>

===={{hilite | 1.1.3.3. || 2026-February-1 }} Snow Loads====

<ol>
<li>In this Standard, a ''high snow load area'' is considered a regional area with a ''Specified Snow Load'' higher than 3.5 kPa (See [[Notes to ASM Standard#A-1.1.3.2.| Note A-1.1.3.2.]]).
<li>Roofs subject to high snow loads must be designed with a supporting deck structure thick enough to support the anticipated live loads, within the acceptable deflection limits defined by the "British Columbia Building Code".
<li>{{hilite | In locations where moderate to heavy snow cover or high snow load conditions are possible or expected, the ''Design Authority'' should give consideration to || 2026-February-1 }} {{strike| Consideration should be given to || 2025-February-1 }}
<ol>
<li>slope,
<li>entrances and exits,
<li>penetrations,
<li>valley construction,
<li>proper intake and exit ventilation, irrespective of snow cover and drifting, and
<li>penetrations and their functionality.
</li></ol>
<li>{{strike| Roofs subject to high snow loads should be designed || 2025-February-1 }}{{hilite | Where snow fences or guards are required by the ''Design Authority'', they should be utilized only where a hazard to the public or property exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid panel distortion and damage to the ''roof system'' || 2026-February-1 }}.
{{strike| <ol>
<li>with full support for metal panels,
<li>with generous slope to shed snow from the roof surface (a slope of at least 1:1.5 (8” in 12”) is strongly recommended),
<li>to utilize a RoofStar-accepted self-adhered eave protection membrane as underlayment over the entire deck surface, regardless of slope and the requirements published elsewhere in this Standard,
<li>with widening valleys (from peak to eave),
<li>so that penetrations are located near the ridge line, and
<li>to utilize snow fences or guards (if so required by the ''Design Authority'') only where a hazard to the public exists; in all other instances it is preferable to allow snow to freely discharge from the roof, to avoid disfigurement and damage to the roof system.
</li></ol> || 2025-February-1 }}
</li></ol>

===={{hilite | 1.1.3.4. || 2026-February-1 }} Ventilation====

<ol>
<li>{{hilite | Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | {{hilite | While the || 2027-February-1 }} design and selection of the ventilation system is the responsibility of the ''Design Authority'',|| 2021-June-30 }} attic ventilation
<ol>
<li>{{hilite | must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, Article 9.19.1.1., "Venting")|| 2027-February-1 }},
<li>{{hilite | must should promote proper convection, drawing cool air from the lowest point in and exhausting warm air out near the ridge, and || 2027-February-1 }}
<li>{{hilite | shall be designed so that exhaust vents are located on only one side of a ridge or hip line, within 609.6 mm (24”) of a ridge, evenly spaced along the ridgeline (vents installed on opposite or adjacent sides of a roof plane, or staggered across the plane of drainage, will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Tall exhaust vents are recommended in regions where snow cover is common || 2027-February-1 }}.
<li>Attic ventilation {{hilite |may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents|| 2021-June-30 }},
<li>{{hilite | gable end vents|| 2021-June-30 }} {{hilite | (for exhaust only)|| 2027-February-1 }},
<li>{{hilite | {{strike| hip || 2026-January-16 }} {{hilite | powered or turbine exhaust || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | static {{hilite | (passive) || 2027-February-1 }} vents|| 2021-June-30 }},
<li>{{hilite | ridge {{hilite | and hip || 2027-February-1 }} vents|| 2021-June-30 }}, or
<li>{{hilite | cupolas|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation must meet the minimum requirements set out by the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"])|| 2021-June-30 }}.
<li>{{hilite | Ventilation must be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite | the slope of the roof|| 2021-June-30 }},
<li>{{hilite | the vented area|| 2021-June-30 }}, and
<li>{{hilite | the design and configuration of the roof structure|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ventilation must be provided for|| 2021-June-30 }}
<ol>
<li>{{hilite | roofs over cathedral ceilings|| 2021-June-30 }}, and
<li>{{hilite | compact insulated roof assemblies|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | {{hilite | are {{strike| acceptable and are || 2026-January-16 }} recommended for all areas with vaulted ceilings|| 2021-June-30}}|| 2027-February-1 }}, and
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Vents shall conform to the material and product requirements in || 2027-February-1 }} [[#12.2.1.4. Air Vents | {{hilite | Article 12.2.1.4.|| 2027-February-1 }}]] {{hilite |and must be selected for their ability to resist intrusion by insects, vermin, wind-driven debris, rain, or snow; leaks attributed to roof vents are not covered by a '''''RoofStar Guarantee'''''|| 2027-February-1 }}.
</li></ol>

====1.1.3.5. Hot Works====
(See [[Notes to ASM Standard#A-1.1.3.5.| Note A-1.1.3.5.]])

<ol>
<li>{{hilite | The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]) || 2021-February-7 }}.
<li>{{hilite | When the ''project'' involves Hot Work, the ''Design Authority'' must either || 2021-February-7 }}
<ol>
<li>{{hilite |pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire sensitive by the ''Contractor'' as part of the risk assessment process || 2021-February-7 }}, or
<li>{{hilite | provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project'' || 2021-February-7 }}.
</li></ol>
</li></ol>

===={{hilite | 1.1.3.6. Variances || 2021-June-30 }}====

<ol>
<li>{{hilite | When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must|| 2021-June-30 }}
<ol>
<li>{{hilite | identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned)|| 2021-June-30 }},
<li>identify the ''Contractor'' (if awarded),
<li>{{hilite | articulate the nature of the design problem|| 2021-June-30 }},
<li>{{hilite | identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")), || 2023-June-16 }}
<li>{{hilite | cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.)|| 2021-June-30 }}, and
<li>provide design drawings, photographs, and roof plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>{{hilite |Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''|| 2021-June-30 }}.
<li>{{hilite |A Variance may be unrestricted in its scope, or it may include one or more conditions, or a restriction in coverage, that will affect the design and construction of the ''project'', to accommodate the varied standard, but this is at the discretion of the '''''Guarantor'''''|| 2021-June-30 }}.
<li>{{hilite |Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm|| 2021-June-30 }}.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)

(See [[Notes to ASM Standard#A-1.1.4.| Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>
</li></ol>

====1.1.4.2. Complete Roof System Replacement====

<ol>
<li>Complete roof system replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Roof system'' replacement means the complete removal and replacement of all ''roof system'' and metal flashing materials, exclusive of the air or vapour ''control layers'', and only new replacement materials shall be installed.
<li>Subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]], the decision to reuse and repair an existing air or vapour ''control layer'' remains the responsibility of the ''Design Authority''.
<li>''Roof system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Reserved====

====1.1.4.4. Reserved====

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a ''control joint'' securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If ''project'' conditions do not allow for a curb joint, the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (See [[#1.1.3.6._Variances |Article 1.1.3.6.]]); any alternative design must
<ol>
<li>include design specifications and construction details showing a positive water cut-off that fully isolates the existing roof from the new roof, and
<li>show how the new ''roof system'' will be easily distinguishable from the existing roof system.
</li></ol>
<li>{{hilite | Repairs or renovations to an existing ''roof system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''roof system''). || 2023-June-16 }}
<li>{{hilite | Modifications or additions to a guaranteed roof are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''. || 2023-June-16 }}
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: {{hilite | Contractor Requirements || 2021-February-7 }}====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====
(See [[Notes to ASM Standard#A-1.3.3.2. | Note A-1.3.3.2.]])

<ol>
<li>{{hilite | The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of {{hilite |the ''project''||2022-February-5 }}.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible to make a permanent seal or install overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]].) || 2021-February-7 }}.
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision, manufacturing, and installation of a RoofStar-guaranteed ''Architectural Sheet Metal Roof System'' shall be undertaken only by established employees of ''Contractors'', each having obtained a valid
<ol>
<li>Architectural Sheet Metal Journeyperson Certificate of Qualification, or
<li>Sheet Metal trade ticket, together with at least five (5) years of documented experience installing and supervising the installation of ASM roofing (ref. RCABC Policy A-248).
</li></ol>
</li></ol>

====1.3.2.4. {{hilite | Contractor Submittals || 2026-February-1 }}====
(See also [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] {{strike| and [[#9.2.1.2. Roll Forming Machines and Mill Certificate | Article 9.2.1.2.]] || 2025-February-1 }})

<ol>
<li>{{strike| {{hilite | To qualify for a '''''RoofStar Guarantee''''', the ''Design Authority'' must || 2023-June-16 }} || 2022-October-28 }}{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'' sealed engineered shop drawings conforming to the requirements in || 2023-October-28 }} [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | and || 2023-October-28 }} [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>{{hilite | When tall clips are used as an alternative to EPDM pads (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]), {{hilite | the ''Contractor'' must provide the '''''Guarantor''''' with stamped, written assurance from the ''Design Authority'' that || 2024-January-31 }}
<ol>
<li>{{hilite | the clips will adequately secure and support the elevated panels, and || 2024-January-31 }}
<li>{{hilite | the panels are suitable as spanning members, and will support anticipated live loads, including loads during construction. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The ''Contractor'' is responsible for providing to the '''''Guarantor''''' a copy of the mill certificate for the sheet metal used to form metal panels and related flashings (the certificate may be provided directly, or shown to the observer who shall take a photographic record of the certificate for the '''''Guarantor''''' || 2026-February-1 }} (See [[#9.2.1.2. Roll Forming Machines and Mill Certificate | {{hilite | Article 9.2.1.2. || 2026-February-1 }}]]).
{{strike| <ol>
<li>{{hilite | document the wind resistant design on a Schedule S form (Specialty engineering; see the "British Columbia Building Code", current edition), and || 2023-June-16 }}
<li>{{hilite | submit the Scheduled S form to the '''''Guarantor''''' as part of the ''project'' record. || 2023-June-16 }}
</li></ol> || 2022-October-28 }}
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>{{hilite | Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing in this Standard. || 2023-June-16 }}
<li>New metal panels and flashing, together with existing rainwater gutters, must be protected from incidental damage including, without limitation, damage caused by ladders.
<li>Existing self-adhered eave protection membrane may be left in place but must be covered with a new layer of RoofStar-accepted membrane, in keeping with the requirements in this Standard.
</li></ol>

====1.3.3.2. Complete Roof System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.3. Partial Roof Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a ''roof system''.
</li></ol>

====1.3.3.4. Reserved====

====1.3.3.5. Tie-ins and Additions to Existing Roofing====

<ol>
<li>Where a new roof adjoins and ties into an existing roof, the two areas must be isolated and separated by a curb joint securely attached to the structure; the curb must be
<ol>
<li>at least 127 mm (5”) in height, and
<li>sealed and flashed in keeping with the requirements for ''curbs'' ([[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]).
</li></ol>
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of curb joints, the new roof system must be fully isolated from the existing roof system with a positive water cut-off that renders the new roof system easily distinguishable from the existing ''roof system''.
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>{{hilite | When a ''roof system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation) || 2023-June-16 }}
<ol>
<li>{{hilite | the securement of new materials || 2023-June-16 }} ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>{{hilite | deck or wall overlays || 2023-June-16 }} ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>{{hilite | continuity of air and vapour controls || 2023-June-16 }} ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>{{hilite | thermal resistance || 2023-June-16 }} ([[#Part 7 - Insulation | Part 7]],
<li>{{hilite | eaves, valleys, and underlayment || 2023-June-16 }} ([[#PART 8 - Eave, Valley, and Field Underlayment | Part 8]]),
<li>{{hilite | metal panels || 2023-June-16 }} ([[#Part 9 - Roof Field (Panel Systems) | Part 9]]),
<li>{{hilite | perimeter details || 2023-June-16 }} ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>{{hilite | drains || 2023-June-16 }} ([[#Part 11 - Drainage | Part 11]]),
<li>{{hilite | penetrations and curbs || 2023-June-16 }} ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>{{hilite | linear metal flashings || 2023-June-16 }} ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>{{hilite | Modifications to an existing ''roof system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', drains, or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated. || 2023-June-16 }}
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to ASM Standard#A-2 | Note A-2]])
<div id="DECK_CONDITION"></div>

=={{hilite | Section 2.1. Design || 2021-June-30 }}==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====
({{hilite | See '''Figure 2.1.1.2.-A''' || 2026-February-1 }})

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a roof with a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>{{hilite | ''Deck overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials|| 2021-June-30 }}.
<li>''Extreme Slope'' means a roof with a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' (roof) means a roof with a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>{{hilite | ''Sheathing'' means a rigid panel material secured directly onto framing. || 2024-January-31 }}
<li>''Steep Slope'' means a roof with a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>{{hilite | ''Supporting deck'' ("deck")|| 2021-June-30 }} {{hilite | means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'')|| 2021-June-30 }}.
<li>{{hilite | ''Wall''|| 2021-June-30 }} {{hilite | means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions")|| 2021-June-30 }}.
<li>{{hilite | ''Wall overlay''|| 2021-June-30 }} {{hilite | means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials|| 2021-June-30 }}.
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2026-February-1 }} {{hilite | Forming Part of Article 2.1.1.2. || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 450 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed with a minimum slope of 1:6 (2” in 12”), which may not be reduced through a written Variance {{hilite | (Note: curved or barrel-shaped roofs may be permitted under a written Variance, subject to a review by the '''''Guarantor'''''). || 2023-June-16 }}
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a roof to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
{{strike| <li>Throughout this Standard, the defined terms of [[#2.1.1.2. Defined Terms | Article 2.1.1.2.]] apply (See '''Figure 2.1.1.2.-A''' for an illustrated guide to the above definitions). || 2025-February-1 }}
<li>Roofs with designed slopes less than the stated minimums in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and in [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.3.]] (i.e., curved applications; see also [[#9.1.3.4. Curved Panel Systems | Article 9.1.3.4.]]) will be considered for a '''''RoofStar Guarantee''''' provided
<ol>
<li>the design and installation details are submitted in writing to the '''''Guarantor''''' prior to the tendering of documents, and
<li>a written Variance is issued by the '''''Guarantor''''' prior to close of tender.
</li></ol>
</li></ol>

====2.1.3.2. Roof Slope for New Construction====

<ol>
<li>Roofs with a designed slope
<ol>
<li>equal to or greater than 1:6 (2" in 12") do not require a written Variance from the '''''Guarantor''''' and must be designed to conform to the requirements in this Standard, howsoever they apply,
<li>less than 1:6 (2" in 12")
<ol>
<li>are permissible only through a written Variance from the '''''Guarantor''''',
<li>shall be designed to conform to the requirements in this Standard, and
<li>shall comply with any and all requirements or conditions stipulated in the Variance.
</li></ol>
</li></ol>
<li>When the designed slope is less than 1:4 (3" in 12"), the engineered shop drawing package must be accompanied by manufacturer’s literature confirming that this application is acceptable.
<li>{{hilite | A minimum slope of 1:6 (2” in 12”) is a requirement for a '''''RoofStar 15-year Guarantee''''' (See [[#2.1.2.2. RoofStar 15-Year Guarantee | Article 2.1.2.2.]]).|| 2022-February-5 }}
</li></ol>

====2.1.3.3. Roof Slope for Replacement Roofing====

<ol>
<li>{{hilite | The requirements in || 2023-June-16 }} [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]] {{hilite | and || 2023-June-16 }} [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] {{hilite | apply to replacement roofing. || 2023-June-16 }}
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Roofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''roof system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.1.| Note A-2.1.5.1.]])

<ol>
<li>Steel ''decks'' must be acceptable to the roof system manufacturer and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
</li></ol>

====2.1.5.2. Concrete Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Direct contact between metal roofing and concrete, light concrete, stone and mortar '''must be avoided'''.
<li>The selection of a suitable underlay, insulation, and method of attachment to a concrete ''deck'' or ''wall'' is the responsibility of the ''Design Authority''.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to ASM Standard#A-2.1.5.3.| Note A-2.1.5.3.]])

<ol>
<li>Wood decks
<ol>
<li>must conform to the material requirements of the Code (see "British Columbia Building Code", Division B, Part 9, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s923 Article 9.23.16.2.. "Material Standards"]),
<li>shall be free of loose knots or cracks,
<li>{{hilite | shall have a moisture content acceptable to the ''manufacturer'' (for self-adhered or adhered membranes, moisture content shall not exceed 19%; Ref. Canadian Wood Council, || 2023-October-28 }} [https://cwc.ca/en/why-build-with-wood/durability/durability-hazards/moisture-and-wood/ "Moisture and Wood"]), and
<li>{{hilite |shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction || 2021-February-7 }}; specifying the structural suitability of fasteners is the responsibility of the ''Design Authority''.
</li></ol>
<li>Differential edge movements or deflection exceeding 1/360 of the span must be prevented
<ol>
<li>by constructing the ''deck'' with tongue-and-groove plywood, and supporting the non-grooved edges with joists or solid blocking, or
<li>by supporting butt joints at unsupported edges with solid blocking.
</li></ol>
<li>All wood decks shall be
<ol>
<li>at least 15.88 mm (5/8") thick, and
<li>capable of the required pull-out resistance for expected fasteners (knotholes and cracks in decks shall be considered defects and must be covered with sheet metal, mechanically fastened in place),
</li></ol>
<li>{{hilite | All mass timber or wood board ''decks'' must be covered with a properly secured, suitable overlay to || 2021-February-7 }}
<ol>
<li>ensure the integrity of the underlayment as mass timber elements contract and expand, and
<li>{{hilite | protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2021-February-7 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li>All types of wood ''decks'' should be roofed promptly after installation.
</li></ol>

====2.1.5.4. Plywood Roof Decks====

<ol>
<li>Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to ASM Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All non-ferrous (i.e. copper, zinc) metal panel roof systems must be installed over tongue-and-groove plywood decks conforming to the minimum material properties and thicknesses stated in this Article.
<li>{{hilite | All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see || 2023-June-16 }} [[#2.1.5.5. Mass Timber Roof Decks | Article 2.1.5.5.]], [[#2.1.5.6. Non-veneered Panel Roof Decks | Article 2.1.5.6.]], and [[#2.1.5.7. Wood Board Roof Decks | Article 2.1.5.7.]]) {{hilite | shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be || 2023-June-16 }}
<ol>
<li>{{hilite | at least 15.88 mm (5/8") thick, unless exceeded by the specified securement design || 2023-June-16 }} (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>{{hilite | free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place, || 2023-June-16 }}
<li>{{hilite | securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing, || 2023-June-16 }}
<li>{{hilite | properly gapped between panels, and || 2023-June-16 }}
<li>{{hilite | fully supported along all panel edges. || 2023-June-16 }}
</li></ol>
</li></ol>

====2.1.5.5. Mass Timber Roof Decks====

<ol>
<li>{{hilite | Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated timbers (Glulam), are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in || 2023-June-16 }} [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
</li></ol>

====2.1.5.6. Non-veneered Panel Roof Decks====

<ol>
<li>{{hilite | Oriented Strand Board (OSB) is not acceptable deck material for Architectural Sheet Metal panel ''roof systems'' || 2023-June-16 }}.
</li></ol>

====2.1.5.7. Wood Board Roof Decks====

<ol>
<li>Wood board ''decks''
<ol>
<li>must be overlaid with plywood in keeping with the general requirements for wood ''decks'' in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
<li>{{hilite | must be removed and replaced with new material when they are damaged or excessively cupped (excessive cupping is considered 25.4 mm (1”) or more when measured against the mid-span deflection of the ''deck''). || 2023-June-16 }}
</li></ol>
</li></ol>

==={{hilite | 2.1.6. Reserved || 2024-October-20 }}===

===2.1.7. Walls===
(See [[Notes to ASM Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====

<ol>
<li>{{hilite | ''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials|| 2021-June-30 }}.
<li>{{hilite | Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings|| 2021-June-30 }}; {{hilite | when sheathing is unsuitable, it must be overlaid with an accepted wall overlay. || 2024-January-31 }}
<li>{{hilite | ''Sheathing''{{strike| , defined as a rigid panel material secured directly onto framing, || 2023-January-26 }} is considered a wall surface for the purpose of this Standard|| 2021-June-18 }}.
<li>{{hilite | ''Wall'' surfaces {{hilite | suitable for || 2024-January-31 }} receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the|| 2021-June-18 }} ''finished system surface'' {{hilite | (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]])|| 2021-June-18 }}.
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to ASM Standard#A-2.1.8.| Note A-2.1.8.]] concerning electrical systems, fire and shock hazards, and Rule 12-022 of the Canadian Electrical Code, Part I)

====2.1.8.1. New Construction====

<ol>
<li>Electrical cables, raceways or boxes shall not be installed within a ''roof assembly'' {{hilite | ({{hilite | '''Figure 2.1.8.1.-A''' || 2026-February-1 }})|| 2021-February-7 }}.
<li>Electrical cables, raceways or boxes shall not be installed on the underside of a ''roof assembly'', unless
<ol>
<li>the ''supporting deck'' structure equals or exceeds 76.2 mm (3”) in thickness {{hilite | ({{hilite | '''Figure 2.1.8.1.-B''' || 2026-February-1 }})|| 2021-February-7 }}, or
<li>the cables, raceways or boxes are installed and supported so there is a separation of not less than 38.1 mm (1-1/2") measured between the underside of the ''roof assembly'' and the electrical installation {{hilite | ({{hilite | '''Figure 2.1.8.1.-C''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
<li>Notwithstanding either (1) and (2), cables or raceways shall be permitted to pass through a ''roof assembly'' for connection to electrical equipment installed on the roof, provided that the passage through the roof is a part of the ''roof assembly'' design.
<li>{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing|| 2021-February-7 }} {{hilite | ({{hilite | '''Figure 2.1.8.1.-D''' || 2026-February-1 }})|| 2021-February-7 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A''' '''Prohibited Installation of Electrical Conduit''' Forming Part of Sentence 2.1.8.1.(1)|| 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B''' '''Roof Decks and Electrical Conduit Installation''' Forming Part of Clause 2.1.8.1.(2)(1) || 2026-February-1 }}(Click to expand)
|-
| [[File:Figure 2.1.8.1.-A (Electrical).jpg | link=https://rpm.rcabc.org/images/f/f5/Figure_2.1.8.1.-A_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-B (Electrical).jpg | link=https://rpm.rcabc.org/images/3/32/Figure_2.1.8.1.-B_%28Electrical%29.jpg | 350 px]]
|}
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-C''' '''Minimum Separation Between Roof Assembly and Electrical Conduit''' Forming Part of Clause 2.1.8.1.(2)(2) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D''' '''Electrical Conduit Elevated Above Roof Assembly''' Forming Part of Sentence 2.1.8.1.(4) || 2026-February-1 }} (Click to expand)
|-
| [[File:Figure 2.1.8.1.-C (Electrical).jpg | link=https://rpm.rcabc.org/images/d/db/Figure_2.1.8.1.-C_%28Electrical%29.jpg | 350 px]] || [[File:Figure 2.1.8.1.-D (Electrical).jpg | link=https://rpm.rcabc.org/images/e/ef/Figure_2.1.8.1.-D_%28Electrical%29.jpg | 350 px]]
|}

<div class="col-md-12">
 
</div>

====2.1.8.2. Roof Replacement and Alterations====

<ol>
<li>If existing electrical cables or boxes do not conform to the requirements in [[#2.1.8.1. New Construction | Article 2.1.8.1.]], the ''Design Authority'' must consider the attachment of the ''roof system'' above the electrical system, and the requirements set out in [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]].
<li>The ''Design Authority'' should
<ol>
<li>specify protection of existing electrical cables and boxes (a 4.76 mm (3/16”) steel plate may be used to minimize the possibility of fastener penetration and cutter damage, {{hilite | but protection plates may interfere with mechanical fasteners used to secure the ''roof system'' against wind uplift, even for future replacement roofing)|| 2021-February-7 }}, and
<li>provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes.
</li></ol>
</li></ol>

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) {{hilite | (These panels are specifically {{hilite | designed to receive roof membranes|| 2021-June-30 }} and may be installed horizontally or vertically)|| 2021-June-30 }}.
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), or
<li>{{hilite | plywood, having a minimum thickness of 12.7 mm (1/2”)|| 2021-June-30 }}.
</li></ol>
<li>Where wall sheathing is unsuitable to receive roofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be constructed with a minimum slope of 1:6 (2” in 12”).
</li></ol>
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of deck and wall structures, and their suitability for the application of roofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Roof Assembly=
==Section 3.1. Design==
===3.1.1. General===
===={{hilite | 3.1.1.1. Scope || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>This Part applies to all new roofs, and to both full and partial replacement ''roof systems''.
<li>This Part sets out the requirements for
<ol>
<li>roofs that support ''overburden'', or fixed amenities and equipment, and
<li>roofs where only part of the ''system'' must be replaced.
</li></ol>
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.1.2. | Note A-3.1.1.2.]])

<ol>
<li>The requirements in this Part intend to support and conform to or exceed the Building Code.
</li></ol>

===={{hilite | 3.1.1.3. Limit of Liability under RoofStar Guarantee || 2023-June-16 }}====

<ol>
<li>{{hilite |Notwithstanding [[#3.1.1.2. Intent | Article 3.1.1.2.]], the materials presented herein are based on an interpretation of the Code and are not the Code itself; therefore, the reader is responsible to exercise good judgement, and to read, understand and comply with the Code, as and how it applies to the reader’s particular ''project'' and its design requirements.
<li>Where the Code can be shown to exceed the requirements, guiding principles, and recommendations of this Part or any related Part in this Standard, the Code shall prevail|| 2021-October-30 }}.
<li>{{hilite |Compliance with this Part or the Code does not guarantee that a roof will not succumb to forces exerted by wind, and therefore neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, a roof system caused by wind; too many variables beyond the control of this Standard affect the wind resistance performance of a ''roof system'', including (without limitation)|| 2021-October-30 }}
<ol>
<li>{{hilite | the ''continuity'' or discontinuity of air and vapour ''control layers'' of the entire building enclosure|| 2021-October-30 }},
<li>{{hilite | openings in the building (windows and doors, which are often occupant-controlled and not static)|| 2021-October-30 }}, and
<li>{{hilite | wind strength, which may exceed the codified numeric wind speed values used to calculate wind resistance for the ''roof system'' || 2021-October-30 }} (Ref. "British Columbia Building Code 2024", Division B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=762 Appendix C, "Table C-1"]).
</li></ol>
</li></ol>

===={{hilite | 3.1.1.4. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }} || 2023-June-16 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Registered Professional'' has the same meaning as that used in the "British Columbia Building Code 2024", Division C, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"].
<li>''Specified Wind Load'' means the calculated force of wind exerted on the roof of a specific building, according to the requirements in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=496 Section 4.1., "Structural Loads and Procedures"].
</li></ol>
</li></ol>

===3.1.2. Guarantee Term Requirements===
====3.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===3.1.3. All Systems===
===={{hilite | 3.1.3.1. Responsibility for Design || 2023-June-16 }}====

<ol>
<li>The ''Design Authority'' is responsible for determining ''Specified Wind Loads'' for each ''roof system'' and each roof area of a ''project'', including roofs that support ''Vegetated Roof Systems'' or any other ''overburden'', amenities, or equipment.
<li>Acceptance of a roof for a '''''RoofStar Guarantee''''' is predicated on the assumption that the ''Design Authority'' has performed Due Diligence with respect to ''Specified Wind Loads'' and has provided the ''Contractor'' with sufficient information to construct a ''roof system'' that complies with the Code.
</li></ol>

===={{hilite | 3.1.3.2. Calculation of Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
<ol>
<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
<li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to ASM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
</li></ol>
<li>Each roof area, at each level (elevation), shall be divided into three principal roof zones ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}), and the ''Design Authority'' shall be responsible for calculating the ''Specified Wind Loads'' for each zone (Ref. the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=535 Article 4.1.7.6., "External Pressure Coefficients for Low Buildings"]).
<li>Roof zones are defined in this Standard as follows:
<ol>
<li>'''Field (F)''' – the interior of the roof bounded by the ''Edge'' and the ''Corners''.
<li>'''Edge (E)''' – the perimeter zone (minus the corners), measured as either 10% of the smallest building width ("least horizontal dimension"), or 40% of the building height, whichever is less. Notwithstanding the requirements in the "British Columbia Building Code", the ''Edge'' zone shall not be less than 2.0 m (7').
<li>'''Corner (C)''' – part of the perimeter but not less than 2.0 m x 2.0 m (7’ x7’) in size, the ''Corner'' area is defined by the ''Edge'' in both directions at the corners. Where the roof geometry includes an inside corner, the ''corner'' zone dimensions shall be the same as those for an outside corner, applied equidistant in each direction from the inside corner ({{hilite | '''Figure 3.1.3.2.-A''' || 2026-February-1 }}).
</li></ol>
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.1.-A Water-shedding Systems 2.jpg|link=https://rpm.rcabc.org/images/c/c7/Figure_3.1.-A_Water-shedding_Systems_2.jpg | 500 px]]
|}
 
<li>A roof area that is divided into smaller segments by means of ''control joints'' (roof dividers, i.e., a fire wall) or ''expansion joints'', shall be considered one roof area for the purpose of calculating the ''Specified Wind Loads'', unless the height of a ''control joint'' or ''expansion joint'' exceeds 1 m (39"), in which case the ''Specified Wind Loads'' for each roof segment shall be calculated separately (See {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When a building is designed with multiple roof levels (at different elevations), and the roofs are adjacent each other (having a common wall), the ''Specified Wind Loads'' for each level, and for each roof area on that level, shall be calculated separately from loads for the adjacent level, unless the elevation difference between adjacent roof levels is less than 1.524 m (5’).
<li>When the shape of a single-level roof varies in width or length, the smallest width dimensions shall be used in the calculation of ''Specified Wind Loads'' (Ref. “minimum effective width” as defined in the "British Columbia Building Code", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=530 Article 4.1.7.2., "Classification of Buildings"]).
 
{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Divided by a Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.1.3.2.(4) || 2026-February-1 }} (Click to expand illustration)
|-
| colspan="1"; style="text-align:center;width:450px;" | [[File:Figure 3.1.-B Water-shedding Systems.jpg|link=https://rpm.rcabc.org/images/8/8e/Figure_3.1.-B_Water-shedding_Systems.jpg | 500 px]]
|}
 
<li>When a roof area intersects the corner of a wall, the ''Edge'' zone on either side of the wall corner must be treated as a roof ''Corner'' (2 x C) {{hilite | '''Figure 3.1.3.2.-B''' || 2026-February-1 }}).
<li>When an existing roof system is specified for partial replacement, the ''Design Authority'' must
<ol>
<li>calculate the ''Specified Wind Loads'' for the roof,
<li>determine if securement of the remaining roof components (left in situ) is sufficient to resist the ''Specified Wind Loads'',
<li>determine a suitable method of securement or have the ''system'' of securement engineered, and
<li>calculate and design securement for any structures or equipment.
</ol></li>
<li>''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement (See also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., "Electrical Cables and Boxes"]]).
<li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
<li>Securement of an adjoining ''waterproofing system'' shall be made in accordance with the requirements in the applicable Standard.
</li></ol>
</li></ol>

===={{hilite | 3.1.3.3. Resistance to Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>The wind uplift resistance capabilities of the selected ''roof system'' must equal or exceed the ''Specified Wind Loads'' calculated for each roof zone to which the ''system'' will be applied (see [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]]).
<li>Engineered designs to resist wind uplift may refer to the "British Columbia Building Code", Div. B, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=764 Appendix C, "Table C-2"], which lists various types of loads, including wind loads, for specific reference locations throughout the province.
<li>Each engineered design must include, without limitation, the following:
<ol>
<li>Metal panel profile and gauge
<li>Type of clips
<li>Bearing plates
<li>Drag load components
<li>Fasteners (type, size and spacing)
<li>Roof assembly components (i.e. underlayment, insulation)
<li>Deck Substrate
</li></ol>
</li></ol>

===={{hilite | 3.1.3.4. Resistance to Other Loads || 2023-June-16 }}====
(See [[Notes to ASM Standard#A-3.1.3.4. | Note A-3.1.3.4.]])

<ol>
<li>In addition to its capacity to resist ''Specified Wind Loads'', the ''roof system'' must be capable of resisting or accommodating
<ol>
<li>all anticipated live and dead loads, including (without limitation) other environmental loads, such as rain and snow, expected for the building’s size and location,
<li>gravity ("drag") loads,
<li>loads from ''overburden'' (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
</li></ol>

====3.1.3.5. {{hilite | Reserved || 2026-February-1 }}====

===3.1.4. Insulated Roof Systems===
===={{hilite | 3.1.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>New and fully replaced ''insulated systems'' shall satisfy the requirements of the "British Columbia Building Code" and this Part, and shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.1.5. Uninsulated Roof Systems===
===={{hilite | 3.1.5.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be designed for securement directly to the ''roof deck''.
</li></ol>

===3.1.6. Reserved===

===3.1.7. Roof Replacement and Alterations===
===={{hilite | 3.1.7.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads'' and must follow the design requirements specified by the ''Design Authority''.
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===
===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The ''Design Authority'' should specify the correct type of fastener, keeping in mind
<ol>
<li>pull-out strength, and
<li>corrosion resistance (contributing factors to fastener corrosion may include dissimilar metal contact, excessive building humidity, corrosive chemicals within components of the ''roof system'', or corrosive elements provided within the building envelope etc.).
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Fasteners
<ol>
<li>used to secure metal panels or clips shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and
<li>used to secure linear metal flashings shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>
</li></ol>

==Section 3.3. Application==
===3.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''',
</li></ol>

===3.3.2. All Systems===
====3.3.2.1. Securing Systems with Mechanical Fasteners====
({{hilite | See '''Figure 3.3.2.1.-A''' || 2021-October-30 }})

<ol>
<li>{{hilite | All metal panels must|| 2021-June-30 }}
<ol>
<li>{{hilite | be secured to a firm support, and || 2023-June-16 }}
<li>{{hilite |utilize concealed fasteners; exposed fastener securement is not acceptable|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | When clips are used to secure metal panels, the clips must be firmly supported and shall be secured by no fewer than two screw-type fasteners || 2023-June-16 }} (Ref. [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]).
<li>Concealed fasteners should provide clearance for the underside of the metal panel and must be of a material compatible with the panel or metal clip.
<li>{{hilite | Regardless of where fasteners are used in the ''roof system'', when they penetrate and secure another material to a substrate, mechanical fasteners must (unless exceeded by the fastener manufacturer’s published requirements)|| 2020-July-3 }}
<ol>
<li>{{hilite |penetrate through the bottom surface of|| 2021-October-30 }}
<ol>
<li>steel ''decks'' at least 19.05 mm (3/4") (fasteners should penetrate the top flutes only), and
<li>{{hilite | plywood sheathing by at least 19.05 mm (3/4")|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |penetrate into solid dimensional lumber or concrete by at least 25.4 mm (1")|| 2021-October-30 }}.
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.3.2.1.-A Fastener Penetration Into or Through Deck''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 3.3.2.1.(4). || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 3.5.jpg|link=http://rpm.rcabc.org/images/9/95/Figure_3.5.jpg| 500 px]]
|}

===3.3.3. Insulated Roof Systems===
===={{hilite | 3.3.3.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Insulated systems'' shall be secured with clips fastened to
<ol>
<li>thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or
<li>mechanically fastened bearing plates which are installed on the top surface of the insulation.
</li></ol>
</li></ol>

===3.3.4. Uninsulated Roof Systems===
===={{hilite | 3.3.4.1. Securement Against Specified Wind Loads || 2023-June-16 }}====

<ol>
<li>''Uninsulated systems'' shall be secured with clips fastened to the ''roof deck'', in keeping with the engineered design requirements (Ref. [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]) and conforming to the material requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]] and [[#9.2.1.5.Clips | Article 9.2.1.5.]]
</li></ol>

===3.3.5. Reserved===
===3.3.6. Roof Replacement and Alterations===
===={{hilite | 3.3.6.1. Complete Roof System Replacement || 2023-June-16 }}====

<ol>
<li>''Roof systems'' that are removed and replaced in their entirety (excluding the air or vapour controls, which may be left in place at the discretion of the ''Design Authority'') must be secured following the requirements for new ''roof systems''.
</li></ol>

===={{hilite | 3.3.6.2. Partial Roof Replacement || 2023-June-16 }}====

<ol>
<li>When only a portion of an existing ''roof system'' is specified for replacement, the new materials must be secured to resist wind ''Specified Wind Loads'', following the design specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'' means a material used in a roof or grade-level waterproofing ''system'' that protects a building interior from water. ''Primary materials'' are often exposed to the weather (protected membranes are an exception), and therefore also protect ''secondary materials'' from damage. Membranes, metal panels, asphalt shingles, and cedar shakes and shingles, form the core body of materials classified as ''primary''.
<li>''Secondary Material'' means one which forms part of a ''waterproofing system'' or ''water-shedding system'', and which may affect the wind resistance characteristics of the entire ''assembly'' but is not necessarily exposed to the weather.
</li></ol>
</li></ol>

===4.1.2. Reserved===
===4.1.3. Reserved===

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the ''manufacturer'' of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>{{hilite | validated with a packing slip, retained in their original packaging, or their packaging must be retained on site, and made available to the observer for verification and documentation || 2026-February-1 }},
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the roof surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====3.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====3.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''roof system'' shall conform to the ''manufacturer's'' published requirements, unless stated otherwise in this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to ASM Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to ASM Standard#A-5.1.3.1.| Note A-5.1.3.1.]])

<ol>
<li>A deck or wall overlay must be specified
<ol>
<li>when a thermal layer is required by the Building Code, or
<li>when the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li>''Uninsulated systems'' designed for a steel deck require a ''deck overlay'' to support the underlayment.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>Deck and wall overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>{{hilite | suitable for the type of ''deck'' || 2023-October-28 }}, and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
<li>When plywood is used as a deck overlay, only tongue-and-groove plywood is acceptable and must be
<ol>
<li>at least 12.7 mm (1/2”) thick when installed over a mass timber deck, or
<li>at least 15.88 mm (5/8”) thick, when the roof supports overburden.
</li></ol>
</li></ol>

====5.2.1.2. Thermal Barrier====

<ol>
<li>When the Code having jurisdiction requires a thermal barrier, any material selected from [[Division_C | Division C]] must be suitable for the purpose.
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU), or
<li>fibre-mat reinforced cement boards with a minimum thickness of 9.53 mm (3/8"), conforming to ASTM C1325 (latest edition), "Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units".
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Panel Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===5.3.2. All Systems===
====5.3.2.1. Support, Arrangement, and Securement of Deck Overlays====

<ol>
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>''Deck'' overlays shall be affixed to the ''deck'' with
<ol>
<li>mechanical fasteners conforming to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]],
<li>polyurethane foam adhesives acceptable to the ''manufacturer'' and conforming to the requirements in [[#3.2.2.2. Adhesives | Article 3.2.2.2.]], or
<li>a combination of mechanical fasteners and polyurethane foam adhesives.
</li></ol>
<li>When mechanical fasteners are used to secure deck overlays, the minimum number of fasteners (in combination with plates) shall be four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel ''deck'' panels must be overlaid with a suitable substrate to provide a smooth, uniform surface for roofing.
<li>RoofStar-accepted ''deck'' overlay boards used as a thermal barrier to achieve a specific fire rating must conform to the applicable code and insurance requirements for the ''roof system''.
<li>When the ''roof system'' is uninsulated, the ''deck'' must be overlaid with at least one 12.7 mm (1/2”) thick layer of
<ol>
<li>moisture resistant gypsum core ''deck'' overlay board, or
<li>plywood.
</li></ol>
</li></ol>

====5.3.2.3. Overlays on Concrete Decks====

<ol>
<li>While metal panels must be separated from a concrete ''deck'' to prevent corrosion, a ''deck overlay'' is not mandatory, and separation may be made with an underlayment.
</li></ol>

====5.3.2.4. Overlays on Wood Decks====

<ol>
<li>A mechanically fastened overlay board is required for any ''deck'' structure that does not meet the ''deck'' fastening criteria set out in [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]].
</li></ol>

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>''Wall'' overlay panels must be
<ol>
<li>mechanically fastened with screw fasteners spaced no more than 304.8 mm (12”) O.C., both vertically and horizontally; fasteners must align with structural supports, and shall be placed
<ol>
<li>at the perimeters,
<li>at the corners, and
<li>in the field, or
</li></ol>
<li>adhered with a polyurethane adhesive, applied with a continuous z-patterned ribbon spaced no less than 304.8 mm (12”) apart.
</li></ol>
</li></ol>
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to ASM Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to ASM Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. {{hilite | Additionally, the following terms are used in this Part || 2024-June-15 }}:
<ol>
<li>{{hilite | ''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material || 2024-June-15 }}.
<li>{{hilite | ''Continuity'' means a sealed, resistive, continuous connection || 2024-June-15 }}
<ol>
<li>{{hilite | between ''control layers'' that have the same function, and || 2024-June-15 }}
<li>{{hilite | between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration) || 2024-June-15 }}.
</li></ol>
<li>{{hilite | ''Control layer'' means a material used in a ''roof assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly || 2024-June-15 }}.
<li>{{hilite | ''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material || 2024-June-15 }}.
<li>{{hilite | ''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material, and is usually used in wall assemblies || 2024-June-15 }}.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible to specify
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''roof system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to ASM Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''roof system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity {{hilite | of Control Layers || 2024-June-15 }} {{strike| Between Building Enclosure Systems || 2023-June-15 }}====

<ol>
<li>The ''Design Authority'', and trades constructing walls and roofs, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between ''wall systems'' and ''roof systems''.
<li>{{hilite | Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor'' || 2024-June-15 }}.
<li>{{hilite | ''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials ({{hilite |some air ''control layers'' are considered vapour permeable, others vapour-impermeable || 2020-October-22 }}); ''roof systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>{{hilite | All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B, || 2024-June-15 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. High-humidity Building Interiors====

<ol>
<li>Careful consideration should be given to the performance characteristics of air and vapour ''control layers'' when specifying such a membrane for ''roof systems'' constructed over high-humidity building interiors, which may be susceptible to the accumulation of moisture within the ''roof system'' unless effective air and vapour controls are installed; these building interiors include (but are not limited to)
<ol>
<li>swimming pools,
<li>commercial laundry facilities,
<li>large aquariums, and
<li>paper mills.
</li></ol>
</li></ol>

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the roof or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to ASM Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a roof designed and built to qualify for a '''''RoofStar Guarantee''''' shall not include
<ol>
<li>polyethylene sheet plastic, or
<li>bitumen-impregnated kraft paper.
</li></ol>
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick {{hilite | self-adhering bituminous or butyl-based membrane || 2026-February-1 }} is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>{{hilite | Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard|| 2020-July-3 }}.
<li>{{hilite | A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited|| 2020-July-3 }}.
</li></ol>

====6.2.1.5. Vapour Controls for Concrete Decks====

<ol>
<li>Because curing concrete releases considerable moisture that can compromise the performance of a ''roof system'', a vapour ''control layer'' installed on new concrete ''decks'' (28 days or older) must be selected to prevent condensation inside the ''roof system''.
<li>A membrane with a permeability of 0.01 perms (Class I) is recommended for applications on concrete substrates, but the selection of vapour control materials is nevertheless the responsibility of the ''Design Authority''.
</li></ol>

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' in the ''roof system'' field, and at perimeters, are installed to provide at least 101.6 mm (4”) of overlap, for continuity of matching layers in adjacent assemblies,
<li>{{hilite | ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', || 2023-June-16 }} and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., walls), when a roof is replaced.
</li></ol>
<li>Installation of all air and vapour control materials must be {{hilite | smooth and uniform, without wrinkles or fish-mouths|| 2020-July-3 }}, and must {{hilite | also|| 2020-July-3 }} conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>{{hilite | When self-adhered membranes are applied directly to a steel supporting ''deck'',|| 2021-February-7 }}
<ol>
<li>{{hilite | membranes should be oriented parallel to the direction of ''deck'' flutes|| 2021-February-7 }}, and
<li>{{hilite | membrane laps and changes in plane must be supported by deck flutes, or by flat metal supports secured to the deck to span gaps|| 2021-February-7 }}.
</ol></li>
<li>When metal supports are used to span gaps between steel deck flutes, they must be
<ol>
<li>{{hilite | fabricated from pre-finished steel with a thickness no less than 24-gauge|| 2021-February-7 }}, and
<li>{{hilite | secured to the ''deck'' with no fewer than two (2) compatible screw fasteners per flute|| 2021-February-7 }} ({{hilite | See {{hilite | '''Figure 6.3.2.1.-A''' || 2026-February-1 }} and {{hilite | '''Figure 6.3.2.1.-B''' || 2026-February-1 }}|| 2021-February-7 }}).
</ol></li>
<li>{{hilite | ''Roof drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity'' || 2024-June-15 }}.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck With Metal Support''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck With Deck Overlay Panel''' Forming Part of Sentence 6.3.2.1.(5) (Click to expand illustration) || 2026-February-1 }}
|-
| [[File:Figure 6.3.1-1.jpg | link=https://rpm.rcabc.org/images/5/54/Figure_6.3.1-1.jpg | 350 px]] || [[File:Figure 6.3.1-2.jpg | link=https://rpm.rcabc.org/images/d/d0/Figure_6.3.1-2.jpg | 350 px]]
|}

====6.3.2.2. Torch-applied Materials====

<ol>
<li>{{hilite | The application of materials to an unprotected combustible material, using a torch, is strictly prohibited|| 2020-July-3 }}.
<li>{{hilite | All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials|| 2020-July-3 }}
<ol>
<li>{{hilite | on ''decks'', ''walls'', blocking, and canted edges|| 2020-July-3 }}, and
<li>{{hilite | that are hidden or obscured within voids, cracks, or orifices|| 2020-July-3 }}.
</li></ol>
<li>{{hilite | When a torch-applied membrane is specified over combustible materials, all joints between overlay panels, and at roof-wall transitions, must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes|| 2020-July-3 }}.
<li>{{hilite | Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]|| 2020-July-3 }}.
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====
<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including {{hilite | heat from|| 2021-June-30 }} liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate and mineral wool. Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral wool insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to ASM Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements, with respect to
<ol>
<li>the use of a thermal barrier between the ''roof deck'' and the insulation ''system'', and
<li>the minimum required thermal resistance of the insulation ''system''.
</li></ol>
</li></ol>

====7.1.3.2. General Requirements====
(See [[Notes to ASM Standard#A-7.1.3.2. | Note A-7.1.3.2.]])

<ol>
<li>{{hilite | Selected board insulation products may be used within an architectural sheet metal panel ''roof systems'', provided the panels are listed in || 2023-June-16 }} [[Division_C | Division C]], {{hilite | and conform to the material specifications in || 2023-June-16 }} [[#Section 7.2. Materials | Section 7.2.]]
<li>{{hilite | Insulation may be used below the ''roof deck'' (not part of the ''roof assembly''), provided a ventilation space no less than 63.5 mm (2-1/2"), measured between the underside of the ''roof deck'' and the top face of insulation, is retained beneath the ''deck'' to keep it cool (Ref. the "British Columbia Building Code", Division B, || 2023-June-16 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.1., "Required venting"], and [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]).
<li>{{hilite | Spray foam insulation may not be used directly beneath a wood ''roof deck'' that supports an architectural sheet metal panel ''roof system'', unless the ''manufacturer'', and the '''''Guarantor''''', jointly agree in writing that moisture in the ''roof deck'' can be adequately vented out of the ''roof assembly''. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>{{hilite | Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee'''''), provided || 2023-June-16 }}
<ol>
<li>{{hilite | the ''Design Authority'' has specified its reuse, and || 2023-June-16 }}
<li>{{hilite | the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code. || 2023-June-16 }}
</li></ol>
</li></ol>

====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
(See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>Insulation ''assemblies'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See {{hilite | '''Figure 7.1.3.4.-A'''|| 2026-February-1 }}).
<li>{{hilite | At intersections with insulated curbs and walls, insulation joints at the roof-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See {{hilite | '''Figure 7.3.2.2.-A)'''|| 2026-February-1 }}. || 2023-June-16 }}
<li>{{hilite | ''Insulated systems'' || 2027-February-1 }}{{strike| that utilize metal panel clips shall specify clip attachment|| 2026-January-31 }} {{hilite | should utilize methods of panel clip attachment that minimize thermal bridging and the potential for condensation (See || 2027-February-1 }}[[Notes to ASM Standard#A-7.1.3.4.(4)| {{hilite | Note A-7.1.3.4.(4))|| 2026-February-1 }}]]{{hilite |, including the use of || 2027-February-1 }}
<ol>
<li>{{hilite | mechanically fastened bearing plates which are installed on the top surface of the insulation layers|| 2027-February-1 }}, {{strike| to thermally non-conductive, intermediate or continuous supports that pass through the insulation ''assembly'', or || 2026-January-31 }}
<li>{{hilite | metal girts placed in the top layer of insulation, secured to the deck with screws penetrating lower layers of insulation|| 2027-February-1 }}, or
<li>{{hilite | thermally non-conductive intermediate or continuous supports that pass through the insulation ''assembly''|| 2027-February-1 }}. {{strike| to mechanically fastened bearing plates which are installed on the top surface of the insulation.|| 2026-January-31 }}
</li></ol>
<li>{{hilite | Where spray foam is specified for use in the roof system, it shall conform to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2027-February-1 }}]] {{hilite |(Also, see Sentence (4), || 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.) || 2027-February-1 }}]].
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Insulated Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.4.1. Reuse of Insulation for Panel Replacement====

<ol>
<li>{{hilite | When a roof is specified for panel replacement only, the existing insulation may be left in place (Subject to the requirements in || 2023-June-16 }} [[#1.1.4.3. Partial Roof Replacement | Article 1.1.4.3.]]), {{hilite | but will be excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
</li></ol>

====7.1.4.2. Protection of Heat-sensitive Insulation====

<ol>
<li>When ''heat-sensitive insulation'' is used in the primary thermal ''assembly'', it must be covered with a ''heat-resistant insulation'' at least 50.8 mm (2”) thick (See [[Notes to ASM Standard#A-7.1.4.2. | Note A-7.1.4.2.]]).
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>The maximum width and length of insulation boards installed with mechanical fasteners is limited only by the ''manufacturer''.
<li>{{hilite | While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''roof system'' from a material handling perspective and consider specifying a thicker panel|| 2021-June-30 }}.
</li></ol>
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.2. Expanded Polystyrene Insulation====

<ol>
<li>Expanded polystyrene ("EPS") is ''heat-sensitive'' and shall conform to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation".
</li></ol>

====7.2.2.3. Polyisocyanurate Insulation====
(See [[Notes to ASM Standard#A-7.2.2.3. | Note A-7.2.2.3.]])

<ol>
<li>Polyisocyanurate insulation ("Polyiso") is ''heat-resistant'' and
<ol>
<li>shall conform to CAN/ULC-S704, "Standard for Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced", and to ASTM C-1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board",
<li>shall be manufactured with non-organic facers, and
<li>shall be labeled to identify the manufacturer and the date of manufacture.
</li></ol>
</li></ol>

====7.2.2.4. Mineral Fibre Insulation====

<ol>
<li>Mineral fibre insulation ("Mineral wool") is ''heat-resistant'' and shall conform to ASTM C726-17, "Standard Specification for Mineral Wool Roof Insulation Board".
</li></ol>

===={{hilite | 7.2.2.5. Spray Foam Insulation || 2027-February-1 }}====
<ol>
<li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2027-February-1 }}.
<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling minor gaps {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
<li>must be offset at least 304.8 mm (12"), both for adjacent layers and for adjacent row (a minus offset tolerance of 50.8 mm (2") maximum is permissible; see '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2026-February-1 }} {{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:7.3 Insulation Offset and Staggered.jpg|link=http://rpm.rcabc.org/images/2/28/7.3_Insulation_Offset_and_Staggered.jpg | 500 px]]
|}
 
<li>{{hilite | On exterior insulated walls, insulation joints at the roof-wall interface must be offset and staggered to eliminate thermal bridging|| 2022-February-5 }} ({{hilite | See {{hilite | '''Figure 7.3.2.2.-B''' || 2026-February-1 }}|| 2022-February-5 }}).
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 7.3.2.2.(3) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-B (ASM).jpg| link=https://rpm.rcabc.org/images/7/7e/Figure_7.3.2.-B_%28ASM%29.jpg | 500 px]]
|}
 
<li>{{hilite | Where penetrations pass through an insulation system, or where thermally non-conductive intermediate or continuous supports for clips are used, any minor voids less than 25.4 mm (1”) around them must be insulated with a spray foam conforming to the material requirements in || 2027-February-1 }}[[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5.|| 2027-February-1 }}]]{{hilite |, to reduce the potential for condensation || 2027-February-1 }}.
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''roof assembly'', calculated to resist the ''Specified Wind Loads'' for the ''roof system''.
<li>{{hilite | When thermally non-conductive clips or bars are utilized on a ''low slope'' roof to retain insulation and support panel clips, they must be embedded in, and fastened through, a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7.]])|| 2021-June-30 }}.
</li></ol>

====7.3.2.4. Protection of Heat-sensitive Insulation====

<ol>
<li>{{hilite | Heat-sensitive insulation must be protected from high temperatures, both during construction and when placed in service, and therefore it must be overlaid with heat-resistant insulation no less than 50.8 mm (2") thick || 2023-June-16 }} (See [[#7.1.4.2. Protection of Heat-sensitive Insulation | Article 7.1.4.2.]]).
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Eave, Valley, and Field Underlayment=
==Section 8.1. Design==

===8.1.1. General===
====8.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====8.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Eave and Valley Protection'' means a self-adhering sheet membrane applied in valleys and in parallel courses {{hilite | on the roof ''deck''|| 2021-June-30 }} along the eaves, up the roof slope to a point measured vertically from the inside of the exterior wall, and intended to block the ingress of water that may leak behind shingles or metal roof panels as the result of snow or ice buildup on the roof surface.
<li>{{hilite | ''Separation Layer'' (sometimes referred to as a "slip sheet") means a roll material installed directly below metal roof panels to|| 2021-June-30 }}
<ol>
<li>{{hilite | inhibit bonding of the metal panels to underlying materials, such as bitumen-based underlayments or ''eave protection'' membranes, or|| 2021-June-30}}
<li>{{hilite | permit the passage of vapour out of the roof system|| 2021-June-30 }} ({{hilite | A ''separation layer'' by itself does not function as a ''ventilation layer''|| 2021-June-30 }}).
</li></ol>
<li>''Underlayment'' means a sheet (rolled) material that is either self-adhering or mechanically fastened (typically with large head nails), and which is installed
<ol>
<li>{{hilite | immediately over the supporting ''deck'' or ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | to provide secondary protection between the ''water-shedding system'' materials and the building interior|| 2021-June-30 }}, and
<li>{{hilite | to keep ''water-shedding system'' materials from adhering to the ''deck''.|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | ''Ventilation Layer''|| 2021-June-30 }} means a layer of roll material, usually comprised of stiff, synthetic entangled mesh, installed directly beneath the metal panels in place of, or in addition to, a ''separation layer''; it forms a ventilation space intended to
<ol>
<li>facilitate the {{hilite | drying|| 2021-June-30 }} of condensation that collects on the bottom surface of metal roof panels, and
<li>inhibit bonding of metal roof panels with underlying materials.
</li></ol>
</li></ol>
</li></ol>

===8.1.2. Guarantee Term Requirements===
====8.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.1.3. All Systems===
====8.1.3.1. Eave Protection====

<ol>
<li>{{hilite | Sheet membrane ''eave protection'' is required on all ''Common Slope'', ''Steep Slope'', and ''Extreme Slope'' roofs, but is not required || 2023-June-16 }}
<ol>
<li>{{hilite | over unheated spaces, and || 2023-June-16 }}
<li>{{hilite | where the roof overhang exceeds 914.4 mm (36") measured along the roof slope from the edge of the roof to the inner face of the exterior ''wall''. || 2023-June-16 }}
</li></ol>
<li>{{hilite |Sheet membrane ''eave protection''|| 2021-June-30 }}
<ol>
<li>must conform to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<li>{{hilite | must be installed on the ''supporting deck'' or on a ''deck'' overlay|| 2021-June-30 }},
<li>{{hilite | may also serve as an air barrier or vapour retarder, or as both, when installed in combination with an ''underlayment'' sharing the same performance characteristics|| 2021-June-30 }},
<li>{{hilite | must be at least 1 mm thick when the roof slope exceeds 1:6 (2” in 12”)|| 2021-June-30 }},
<li>{{hilite | shall be at least 3 mm thick when the roof slope is less than 1:6 (2” in 12”)|| 2021-June-30 }}. and
<li>must be carried
<ol>
<li>a minimum of 609.6 mm (24") up inside interior walls (914.4 mm (36") in heavy snow load conditions, and
<li>down the vertical face of the eave and rake edges by at least 50.8 mm (2").
</li></ol>
</li></ol>
</li></ol>

====8.1.3.2. Valley Protection====

<ol>
<li>Valley Protection is required on all ''projects'', shall conform to the requirements for eave protection in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]], and shall be specified to cover the entire valley, even where eave protection is exempt.
</li></ol>

====8.1.3.3. Field Underlayment====

<ol>
<li>''Underlayments'' are required on all Architectural Sheet Metal Panel Systems, and
<ol>
<li>must be self-adhering when the roof slope is equal to or greater than 1:6 (2" in 12") but is less than 1:3 (4" in 12"), and
<li>may be nail-applied or self-adhered when the roof slope is 1:3 (4" in 12") or greater.
</li></ol>
<li>{{hilite | Self-adhered membranes specified for ''low slope'' roofs (slopes less than 1:3 (4" in 12")) must || 2023-June-16 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2023-June-16 }} [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]{{hilite | , and || 2023-June-16 }}
<li>{{hilite | achieve a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")) || 2023-June-16 }}
</li></ol>
<li>{{hilite |Multiple layers of self-adhering ''eave protection'' membrane may be specified to achieve the minimum thickness requirement in this Article, but|| 2021-June-30 }}
<ol>
<li>{{hilite |each layer must be at least 1.4 mm thick,|| 2021-June-30 }} and
<li>{{hilite |layering must be permitted by the '''''Guarantor''''' through a written Variance (Ref. [[#1.1.3.6. Variances | Article 1.1.3.6.]])|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Underlayments for roofs in high snow load conditions are governed by the requirements in || 2026-February-1 }} [[#9.1.3.3. Panel Seams | {{hilite | Article 9.1.3.5. || 2026-February-1 }}]].
</li></ol>

====8.1.3.4. Separation Layer Between Materials====

<ol>
<li>A separation layer {{strike| material || 2026-January-28 }} is required
<ol>
<li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or
<li>{{hilite |when soldering is to be done|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), a|| 2027-February-1 }} {{hilite |vapour-permeable ''separation layer'' {{hilite | conforming to the requirements in [[#8.2.1.4. Separation Materials | Article 8.2.1.4.]]|| 2027-February-1 }} is required between metal panels and insulation.|| 2021-June-30 }}
<li>{{hilite | Self-adhered underlayments that are impermeable, that are used in an uninsulated ''roof assembly'' and which are manufactured with a non-bonding top facer, do not require an additional separation layer|| 2027-February-1 }}.
</li></ol>

====8.1.3.5. Ventilation Beneath Panels====
{{hilite | (See [[Notes to ASM Standard#A-8.1.3.5. | Note A-8.1.3.5.]]. || 2024-January-31 }} {{hilite | Also see [[#8.3.2.6. Ventilation Materials | Article 8.3.2.6.]] and [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] for installation requirements) || 2027-February-1 }}

<ol>
<li>{{hilite | A ''ventilation'' {{hilite | (drying) || 2027-February-1 }} ''space'' beneath metal roof panels|| 2021-October-30 }}
<ol>
<li>{{hilite | is required on slopes less than 1:3 (4” in 12”)|| 2021-October-30 }},
<li>is required beneath curved panel ''systems'', and
<li>{{hilite | is recommended when the roof slope exceeds 1:3 (4” in 12”)|| 2021-June-30 }}.
</li></ol>
<li>{{strike| {{hilite | Ventilation beneath panels shall be incorporated into the ''roof system'' design|| 2021-October-30 }} || 2026-January-27 }}{{hilite | A ''ventilation'' (drying) ''space'' beneath panels shall conform to the installation requirements in this Standard and shall be achieved by || 2027-February-1 }}
<ol>
<li>{{hilite | {{strike| by || 2026-January-27 }} supporting the metal panels with entangled mesh {{hilite | conforming to the material requirements in [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]|| 2027-February-1 }}{{strike| that is at least 6.35 mm (1/4”) thick, and by securing the panels using standard panel clips supported on EPDM pads equal in thickness to the entangled mesh (Ref. [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])|| 2021-October-30 }}|| 2026-January-27 }}, or
<li>{{hilite | {{strike| by || 2026-January-27 }} elevating unsupported metal panels above the underlying substrate materials by at least 9.53 mm (3/8”), {{hilite | provided the panels satisfy the requirements in Article 1.1.3.1., Sentence (2)|| 2027-February-1 }}. {{strike| and securing the panels with tall panel clips; this approach does not require EPDM pads and entangled mesh, and is acceptable provided {{strike| the ''Design Authority'' supplies the '''''Guarantor''''' with written engineering certification that || 2023-January-26 }}|| 2021-October-30 }} || 2026-January-27 }}
{{strike| <ol>
<li>{{hilite | the ''Contractor'' provides the '''''Guarantor''''' with written assurance concerning the load-bearing capacity of the panel system (Ref. || 2024-January-31 }} [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], "Submittals"),
<li>{{hilite | clips are fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | bearing plates (when used) are embedded in an acceptable sealant, to prevent water ingress around the screws. || 2024-January-31 }}
</li></ol>
</li></ol>
<li>{{hilite | When tall clips are used as an alternative to EPDM pads, the clips shall be fully embedded in a compatible sealant (Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]]), {{hilite | but when bearing plates are used without EPDM pads and support tall clips, the bearing plates shall also be embedded in sealant, to prevent water ingress around the screws. || 2024-January-31 }}

{{strike| <li>{{hilite | the clips will adequately secure and support the elevated panels|| 2021-October-30 }}.
<li>{{hilite | the panels are suitable as spanning members and will support anticipated live loads, including loads during construction|| 2021-October-30 }}. || 2023-January-26 }} || 2026-January-27 }}
</li></ol>
</li></ol>

==Section 8.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===8.2.1. Material Properties===
====8.2.1.1. Suitability of Materials====

<ol>
<li>{{hilite | All materials specified for use in a ''roof system'' must be expressly manufactured for use in a roof and must be listed in Division C (Ref. || 2024-June-15 }} [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.).]]
<li>{{hilite | Materials used for ''eave or valley protection'', as an ''underlayment'', or as a ''separation layer'', must not damage the painted finish of roof panels (a scratched or marred finish may result in panel corrosion)|| 2020-July-3 }}.
<li>{{hilite | When a material not listed in [[Division_C | Division C]] is specified for application in an Architectural Sheet Metal Roof System, the ''Design Authority'' must request a written Variance from the '''''Guarantor'''''|| 2020-July-3 }}.
<li>{{hilite | The ''Design Authority'' must select the most suitable material for eave protection, a separation layer, or as an underlayment, based on || 2024-June-22 }}
<ol>
<li>{{hilite | where the material will be located within the roof assembly, || 2024-June-15 }}
<li>{{hilite | the anticipated service temperature for the material, and || 2024-June-15 }}
<li>{{hilite | the material's published service temperature rating (see || 2024-June-15 }} [[Notes to ASM Standard#A-8.2.1.1.(3) | Note A-8.2.1.1.(3)]]).
</li></ol>
<li>All membranes must be supplied with proprietary sealants, mastics, tapes, and primers, each one suitable for the application of the ''underlayment''.
</li></ol>

====8.2.1.2. Eave and Valley Protection====

<ol>
<li>{{hilite |{{hilite | Bituminous || 2026-February-1 }} sheet membranes used for ''eave and valley protection'' must|| 2021-June-30 }}
<ol>
<li>{{hilite | conform to the requirements in CSA-A123.22, "Self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection," || 2023-June-16 }}
<li>{{hilite | be made of bitumen with a high softening point and a minimum flow temperature of 87.7°C (190°F) when they are used immediately below any metal panels or flashing (Ref. ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material"), || 2023-June-16 }}
<li>be self-adhering, and
<li>{{hilite | have a sanded or synthetic, non-bonding top surface|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Butyl-based sheet membranes used for eave and valley protection shall || 2026-February-1 }}
<ol>
<li>{{hilite | be self-adhering and || 2026-February-1 }}
<li>{{hilite | have a synthetic, non-bonding top surface|| 2026-February-1 }}.
</li></ol>
</li></ol>

====8.2.1.3. Underlayment====

<ol>
<li>{{hilite | Mechanically attached polymeric ("synthetic") fabric underlayments shall conform to the criteria in || 2023-June-16 }} [http://rpm.rcabc.org/images/b/bb/Acceptance_Criteria_RGC_ACWS-PUL.pdf RGC ACWS-PUL, "RGC Acceptance Criteria for Mechanically Attached Polymeric Roof Underlayments Used in Water-shedding Systems"].
<li>{{hilite | {{hilite | Self-adhering modified bituminous or butyl-based || 2026-February-1 }} sheet membrane underlayments must conform to the requirements in [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]] {{hilite | and || 2024-January-31 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]|| 2022-June-17 }}
</li></ol>
</li></ol>

====8.2.1.4. Separation Layer====

<ol>
<li>{{hilite | Separation layer materials || 2027-February-1 }}
<ol>
<li>{{hilite | must be manufactured as rolled goods and shall resist bonding with the underside of metal panels, and || 2027-February-1 }}
<li>{{hilite | may be self-adhered or loose laid || 2027-February-1 }}.
</li></ol>
<li>{{hilite | Breathable separation layers shall be manufactured to allow the passage of water vapour through the material and therefore shall have a minimum permeability rating of 5 perms, tested and validated using ASTM E96/E96M-22a, "Standard Test Method for Gravimetric Determination of Water Vapour Transmission Rate of Materials" (products with a US permeability rating less than 5 perms are considered impermeable and therefore unsuitable as separation materials in insulated roof systems) || 2027-February-1 }}.
<li>{{hilite | Entangled mesh || 2023-June-16 }} (See [[#8.2.1.5. Ventilation Materials | Article 8.2.1.5.]]), {{hilite | which is commonly used for ventilation immediately beneath metal panels, may also serve as a separation (bond-breaking) material. || 2023-June-16 }}
</li></ol>

====8.2.1.5. Ventilation Materials====

<ol>
<li>{{hilite | Entangled mesh used in a ventilation cavity must {{strike| be || 2025-February-1 }}|| 2021-October-30 }}
<ol>
<li>{{hilite | be manufactured from polymeric filaments that fuse where they intersect|| 2026-February-1 }},
<li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
<li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.
</li></ol>

====8.2.1.6. Fasteners====

<ol>
<li>Mechanical fasteners used to secure nail-applied underlayments must conform to the underlayment manufacturer’s requirements.
<li>Staples are not permitted.
</li></ol>

==Section 8.3. Application==
===8.3.1. Guarantee Term Requirements===
====8.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====8.3.1.2. RoofStar 15-Year Guarantees====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===8.3.2. All Systems===
====8.3.2.1. Installation of Eave Protection====

<ol>
<li>{{hilite | Where ''eave protection'' is required, it must || 2023-June-22 }}
<ol>
<li>{{hilite | overhang the fascia by at least 25.4 mm (1”), || 2023-June-22 }}
<li>{{hilite | extend up the slope at least 914.4 mm (36"), or to a line not less than 609.6 mm (24") inside the inner face of the exterior wall || 2023-June-22 }} (914.4 mm (36") in regions with heavy snow; see {{hilite | '''Figure 8.3.2.1.-A''' || 2026-February-1 }}), and
<li>{{hilite | extend up all abutments (walls, skylights, etc.) at least 152.4 mm (6″) above the surface of the ''finished system surface''. || 2023-June-22 }}
</li></ol>
<li>{{hilite | Horizontal runs of ''eave protection'' must be positively lapped at least 50.8 mm (2″) and end laps (vertical joints) must be at least 152.4 mm (6″). || 2023-June-22 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 8.3.2.1.-A Eave Protection Requirements''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 8.3.2.1.(1) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File: Figure 8.3.2.-A (ASM).jpg | link=https://rpm.rcabc.org/images/1/17/Figure_8.3.2.-A_%28ASM%29.jpg | 500 px]]
|}

====8.3.2.2. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membranes must|| 2021-June-30 }}
<ol>
<li>{{hilite | be the same materials used for ''eave protection'', conforming to the requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],|| 2021-June-30 }},
<li>{{hilite | be centred on,|| 2021-June-30 }} and installed parallel to, the valley line, extending from the eave edge past the upper end of the valley metal flashing, at least 50.8 mm (2”),
<li>{{hilite | be at least 990.6 mm (39”) wide and centred on the valley|| 2021-June-30 }},
<li>positively overlap lower runs of valley membrane by no less than 152.4 mm (6”), rolled to ensure even, full adhesion, and
<li>{{hilite | positively lap and seal to the ''eave protection'' membrane|| 2021-June-30 }}.
</li></ol>
</li></ol>

====8.3.2.3. Underlayment for Common and Steep Slopes====

<ol>
<li>All nail-applied polymeric ("synthetic") ''underlayments'' installed on slopes less than 2:3 (8” in 12”)
<ol>
<li>shall be installed using fasteners acceptable to the manufacturer of the ''underlayment'',
<li>shall be secured to conform to the ''underlayment'' manufacturer's published instructions,
<li>must run parallel to the eave,
<li>shall positively overlap adjacent material by
<ol>
<li>at least 76.2 mm (3″) along the sides, unless exceeded by the ''manufacturer’s'' instructions, and
<li>at least 152.4 mm (6″) at the ends, unless exceeded by the ''manufacturer’s'' instructions,
</li></ol>
<li>must run beneath all ''water-shedding system'' materials, irrespective of slope,
<li>must extend beneath all perimeter ''linear metal flashing'',
<li>shall cover the roof deck beneath all penetration flashings, and
<li>must be carried up vertical surfaces at least 152.4 mm (6”) above the ''roof deck'', where roofing materials and flashings adjoin walls or curbs.
</li></ol>
<li>"Negative" laps that are unavoidable in horizontally applied courses of ''underlayment'' are permissible, but only when
<ol>
<li>the ''underlayment'' is a self-adhering membrane (Ref. [[#8.2.1.3. Underlayment | Article 8.2.1.3.]]),
<li>the membrane runs overlap at least 152.4 mm (6"), and
<li>lapped seams are roller-pressed and sealed with a compatible sealant along the seam edge.
</li></ol>
<li>Installing nail-applied polymeric ("synthetic"), self-adhered bituminous, or butyl ''underlayments'' perpendicular to the eave is permissible but the laps must be self-sealing or must be sealed with a suitable lap cement provided by the underlay manufacturer.
<li>When an ''underlayment'' is installed perpendicular to the eave and the roof slope exceeds 2:3 (8” in 12”), the ''underlayment''
<ol>
<li>shall be self-adhering,
<li>must extend beyond the furthermost edge of the flashing at least 101.6 mm (4"), and
<li>shall positively laps beneath other vertical membranes.
</li></ol>
</li></ol>
</li></ol>

====8.3.2.4. Underlayment for Slopes Less Than 1:3====

<ol>
<li>All roofs sloped less than 1:3 (4" in 12") must be covered with one or more layers of self-adhered or thermally fused ''underlayment'' membrane,
<ol>
<li>conforming to the material requirements in [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>achieving a finished thickness of at least 1 mm (3 mm for roofs sloped less than 1:6 (2" in 12")), and
<li>installed to conform to the requirements in [[#8.3.2.4. Underlayment for Slopes Less Than 1:3 | Article 8.3.2.4.]]
</li></ol>
<li>{{hilite |Applying multiple layers of self-adhering ''eave protection'' membrane to achieve the minimum thickness requirement is permissible, provided|| 2021-June-30 }}
<ol>
<li>layering is acceptable to the underlayment manufacturer,
<li>{{hilite |the second layer is offset from the first by at least 304.8 mm (12"), both horizontally and vertically,|| 2021-June-30 }} and
<li>{{hilite | the ''Design Authority'' has obtained a written Variance from the '''''Guarantor''''' permitting multiple layers. || 2023-June-16 }}
</li></ol>
</li></ol>

====8.3.2.5. Separation Materials====

<ol>
<li>Horizontal runs of separation materials must be positively lapped at least 50.8 mm (2"), and vertical end joints must be lapped at least 152.4 mm (6").
</li></ol>

====8.3.2.6. Ventilation Materials====

<ol>
<li>{{strike| ''Roof systems'' that require a ventilation space shall conform to the design specifications and required in [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]] || 2026-January-27 }}{{hilite | Ventilation materials shall be installed to conform to [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]] || 2027-February-1 }}
</li></ol>

<hr>
<div id=PART_9></div>

=Part 9 - Roof Field (Panel Systems)=

==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary roof covering, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>be designed using only RoofStar-accepted panels (or panels manufactured with a RoofStar-accepted roll forming machine) secured with a hidden clip system; flange-fastened panels may not be specified or installed.
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====
(See [[Notes to ASM Standard#A-9.1.3.1.| Note A-9.1.3.1.]])

<ol>
<li>Shop drawings for each ''project'' detail, which may be drawn by the ''Contractor'', must be reviewed by the Accepted observer and returned to the ''Guarantor'', verifying conformity to the '''''RoofStar Guarantee Standards''''' prior to the start of construction.
<li>Each construction detail must be reviewed during a field review and documented in the observer's RGC field review report, to verify conformity to the '''''RoofStar Guarantee Standards'''''.
<li>A system designed with a slope less than 1:6 (2" in 12") must conform to the limitations and conditions in [[#2.1.3. All Systems | Subsection 2.1.3.]]

<li>{{hilite | Metal panel seam types must conform to the following permissible applications and length limitations, to '''Table 9.1.3.3.-A''', and to any other seam requirements in this Part, to qualify for a '''''RoofStar Guarantee'''''|| 2027-June-11 }}:
<ol>
<li>{{hilite | Mechanically locked standing seams utilizing concealed clips ('''Figure 9.1.3.1.-A''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used on roof slopes 1:6 (2” in 12”) or greater (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies || 2027-June-22 }},
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]]|| 2027-June-11 }},
<li>{{hilite | may be permitted for slopes less than 1:6, but this is subject to a Variance review (See Variance requirements in [[#2.1.3. All Systems | Subsection 2.1.3.]])|| 2027-June-11 }},
<li>{{hilite | shall be seamed with butyl when the primary slope is 1:4 (3” in 12”) or less (See '''Table 9.1.3.3.-A'''; also see [[#9.3.2.4. Panel Securement and Seams | Article 9.3.2.4.]] and '''Figure 9.3.2.4.-A''') and|| 2027-June-11 }}
<li>{{hilite | are the only seams permitted in locations with high snow loads (for more about high snow load conditions, see [[#9.1.3.5. Roofs in High Snow Load Conditions | Article 9.1.3.5.]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams utilizing concealed clips ('''Figure 9.1.3.1.-B''') || 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-cap seams utilizing concealed clips ('''Figure 9.1.3.1.-C''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be used only on roof slopes greater than 1:4 (3” in 12”) (for slopes less than 1:3, see the requirements for a ventilation (drying) cavity in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]])|| 2027-June-11 }},
<li>{{hilite | may be used over insulated and uninsulated assemblies, and || 2027-June-11 }}
<li>{{hilite | may be produced to the maximum length specified by the manufacturer (subject to other factors, such as the coefficient of expansion; see Sentence (4) and [[Notes to ASM Standard#A-9.2.1.1.(5)(2)| Note A-9.2.1.1.(5)(2)]])|| 2027-June-11 }}.
</li></ol>
<li>{{hilite | Snap-locked seams on flange-fastened panels ('''Figure 9.1.3.1.-D''')|| 2027-June-11 }}
<ol>
<li>{{hilite | may be installed only in uninsulated assemblies|| 2027-June-11 }},
<li>{{hilite | are permissible only on roof slopes greater than 1:3 (4" in 12"), and|| 2027-June-11 }}
<li>{{hilite | are limited to a maximum length of 9144 mm (30’)|| 2027-June-11 }}.
</li></ol>
<li>The ''Design Authority'' must calculate the maximum panel length based on
<ol>
<li>the material type,
<li>the direction of expansion and contraction that is determined by the location of drag load fasteners, and
<li>the amount of expansion and contraction provided by
<ol>
<li>the fastener slot on the fastening flange, or
<li>the concealed expansion clip slot.
</li></ol>
</li></ol>
<li>Panels must be able to withstand loads as required in [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]]
<li>Panels must be solidly supported (See '''Figure 9.1.3.1.-A''' (1 and 2)), unless
<ol>
<li>the panel is made to be self-supporting (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]; also see [[#9.2.1.1. Panel Grade, Gauge, and Fabrication | Sentence 9.2.1.1.(9)]]), or
<li>a ventilation space is required and the panels are suitably supported with entangled mesh (See [[#8.1.3.5. Ventilation Beneath Panels
| Article 8.1.3.5.]]; also see '''Figures 9.3.2.5-A''' through '''F''' in [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
</li></ol>
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.1.3.1.-A (1)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|}

::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.1.3.1.-A (2)''' '''Illustration of uninsulated system with standard clip fastened to deck''' Forming part of Sentence 9.1.3.1.(6)|| 2027-June-11 }} (Click to expand illustration)
|-
| [[File:Illustration Unavailable (Filler Image).png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png | 500 px]]
|}

====9.1.3.2. System Securement====

<ol>
<li>{{hilite | Panel shape and securement must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]).
<li>Metal panels must be pinned to the structure with fasteners, to prevent slippage down the roof because of the weight of the ''roof system'' ("drag loads").
</li></ol>

====9.1.3.3. Panel Seams====

<ol>
<li>Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}.
</li></ol>
 
::::::::::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights''' || 2026-February-1 }} {{hilite | Forming Part of Article 9.1.3.3. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! {{hilite | Conditions || 2026-February-1 }} (see also Part 2) !! Seam Height Minimums !! Permissible Seam Types
|-
| 1:3 (4" in 12") or greater || 25.4 mm (1") || All
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 1:6 (2" in 12") to (less than) 1:3 (4" in 12") || 38.1 mm ( 1-1/2”) || Mechanical Lock only (single or double)
|-
| 41.28 mm ( 1-5/8”) || Snap Lock (male seam)
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender) || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || Mechanical Lock only (single or double)
|-
| 50.8 mm (2”) || Mechanical Lock only (double)
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | Power-curved panels (reviewed by RGC prior to tender) || 38.1 mm (1-1/2”) + butyl sealant in seam || Mechanical Lock only (single or double)
|-
|-
| rowspan="1" style="vertical-align:centre;text-align:center;" | {{hilite | Locations with High Snow Loads (defined in Article 1.1.3.3.) || 2026-February-1 }} || {{hilite | 50.8 mm (2”) + butyl sealant in seam || 2026-February-1 }} || {{hilite | Mechanical Lock only (double) || 2026-February-1 }}
|}

====9.1.3.4. Curved Panel Systems====
(See [[#9.3.2.8. Curved Panels | Article 9.3.2.8.]])

<ol>
<li>Curved panel systems
<ol>
<li>are permissible, but because a curved system diminishes in slope to a zenith of 0°, the design must be submitted to the '''''Guarantor''''' prior to tender (See [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>may be specified with a minimum seam height of 38.1 mm (1-1/2") (subject to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>must continuously cover a curved substrate; segmented panels are not permissible, and
<li>must incorporate a ventilation space (see [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]).
</li></ol>
<li>{{hilite | Stiffeners are optional for curved panels, and when they are desired, the ''Design Authority'' should consult with the ''Contractor'' about stiffener profiles that can be power-curved. || 2023-June-16 }}
</li></ol>

===={{hilite | 9.1.3.5. Roofs in High Snow Load Conditions || 2026-February-1 }}====
<ol>
<li>Roofs subject to high snow loads ([[#1.1.3.3. Snow Loads | Article 1.1.3.3.]]) require
<ol>
<li>full support for metal panels,
<li>a self-adhered underlayment conforming to the material requirements in [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] and [[#8.2.1.3. Underlayment | Article 8.2.1.3.]],
<li>metal panels seams
<ol>
<li>with a height no less than 50.8 mm (2”) (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}),
<li>that are double-locked, and
<li>sealed with butyl (See [[#9.3.2.4. Panel Securement and Seam | Sentence 9.3.2.4.(7)]]),
</li></ol>
<li>valleys conforming to [[#10.1.5.3. Valleys for Heavy Snow Load | Article 10.1.5.3.]], and
<li>placement of penetrations near the ridge line of the roof.
</li></ol>
<li>Insulated (above the roof deck; see [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]]) architectural sheet metal roofs must be designed to conform to the requirements in Sentence (1) and shall be designed with slopes equal to or greater than 1:1.5 (8” in 12”) and must permit the free discharge of snow from the roof, except where life safety is concerned.
<li>A roof with slopes less than 1:1.5 (8” in 12”) shall conform to the requirements in Sentence (1) and must be designed as a vented (cold) roof in which
<ol>
<li>the vented space above the insulation assembly shall be determined by a Building Envelope Consultant but shall not be less than 76.2 mm (3”)
<li>the supporting deck for the metal panel system is plywood with a minimum thickness of 19.05 mm (3/4”) (thickness is subject to the engineering requirements in Sentence (2)),
<li>the underlayment is self-adhering and possesses a minimum thickness of
<ol>
<li>1.0 mm when it is butyl-based,
<li>1.5 mm when it is bituminous, or
<li>3.0 mm when the slope is less than 1:6 (2” in 12”) (See [[#8.1.3.3. Field Underlayment | Article 8.1.3.3.]]), and
</li></ol>
<li>entangled mesh and EPDM pads are capable of supporting the anticipated loads from snow and other service conditions, without deformation (See [[#8.2.1.5. Ventilation Materials | Articles 8.2.1.5.]] and [[#9.2.1.6. EPDM Pads | Article 9.2.1.6.]]).
</li></ol>
</li></ol>

===9.1.4. Insulated Systems===
====9.1.4.1. General Requirements====

<ol>
<li>{{hilite | Insulated ''Architectural Sheet Metal Roof Systems'' || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-22 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]),
<li>{{hilite | shall conform to all other requirements in this Standard, || 2023-June-16 }} and
<li>{{hilite | shall minimize or eliminate thermal bridging, using thermally non-conductive clips or bars, or by using mechanically fastened bearing plates || 2023-June-16 }} (see [[#Part 7 - Insulation | Part 7, "Insulation"]]).
</li></ol>
</li></ol>

===9.1.5. Uninsulated Systems===
====9.1.5.1. General Requirements====

<ol>
<li>{{hilite | Uninsulated Architectural Sheet Metal Roof Systems || 2023-June-16 }}
<ol>
<li>{{hilite | must be designed to resist ''Specified Wind Loads'' || 2023-June-16 }} (Ref. [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] and [[#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]]), and
<li>{{hilite | shall conform to all other requirements in this Standard. || 2023-June-16 }}
</li></ol>
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===9.2.1. Material Properties===
====9.2.1.1. Panel Grade, Gauge, and {{strike| Selection || 2025-February-1 }} {{hilite | Fabrication || 2026-February-1 }}====

<ol>
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06, CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06, ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
<li>'''Aluminum-Zinc alloy-coated steel''': 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06, CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1828.8 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>{{hilite | All panels must be factory-manufactured, or site-fabricated by an accepted ''Contractor'', and listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Metal panels must be fabricated to fully span the distance from eave to ridge, unless interrupted by ''curbs'', ''walls'', or penetrations || 2026-February-1 }}.
<li>{{hilite | Notwithstanding Sentence (4), curved metal panels, including metal panels over barrel-shaped structures (See|| 2026-February-1 }} [[#2.1.3.1. General Requirements for Roof Slope | {{hilite | Sentence 2.1.3.1.(3)|| 2026-February-1 }}]] {{hilite | concerning pre-tender reviews by the '''''Guarantor'''''), may be manufactured in segments when || 2026-February-1 }}
<ol>
<li>{{hilite | panel lengths are too long to be practicable (for example, on a barreled roof), or|| 2026-February-1 }}
<li>{{hilite | the panel material’s coefficient of thermal expansion will induce movement that exceeds the capacity of panel clips (See also|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) | {{hilite | Note A-9.2.1.1.(5)(2))|| 2026-February-1 }}]],
{{hilite | but this is permissible only when|| 2026-February-1 }}
<ol>
<li>{{hilite | the ''Design Authority'' requests a written Variance from the '''''Guarantor''''' prior to tendering the project|| 2026-February-1 }},
<li>{{hilite | the roof slope at the point of division is not less than 1:2 (6” in 12”) (See '''Figure 9.2.1.1.-A'''; also see|| 2026-February-1 }} [[Notes to ASM Standard#Note A-9.2.1.1.(5)(4) | {{hilite | Note A-9.2.1.1.(5)(4)|| 2026-February-1 }}]]{{hilite | ), || 2026-February-1 }}
<li>{{hilite | the transition flashing between panel segments has a slope of at least 1:3 (4” in 12”) (See '''Figure 9.2.1.1.-B'''), and || 2026-February-1 }}
<li>{{hilite | the ''Contractor'' has submitted to the '''''Guarantor''''' the engineered shop drawings showing the detailing of the division of metal panels, as part of the request for a written Variance|| 2026-February-1 }}.
</li></ol>
</li></ol>
<li>Sheet steel, copper and zinc roof panels may be roll-formed to a maximum width of 500 mm (20”).
<li>All metal roof panels over 304.8 mm (12”) in width must be roll-formed or factory-fabricated with stiffening ribs or striations.
<li>Panels fabricated with perforated fastening holes or slots must not exceed 9144 mm (30’) in length.
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath the panels that are not supported by a ''ventilation layer'', and tall clips are used to support the raised panels, the panels must be engineered to support anticipated live loads without permanent deformation (Ref. [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-A Segmented Curved Metal Panels Showing Transition Flashing''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 9.2.1.1.-B Minimum Slope Requirements for Segmenting Curved Metal Panels''' Forming Part of Sentence 9.2.1.1.(5) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 9.2.1.1.-A.png | link=https://rpm.rcabc.org/images/e/ef/ASM_Figure_9.2.1.1.-A.png | 450 px]] || [[File:ASM Figure 9.2.1.1.-B.png | link=https://rpm.rcabc.org/images/c/ca/ASM_Figure_9.2.1.1.-B.png | 450 px]]
|}

====9.2.1.2. Roll Forming Machines and Mill Certificate====

<ol>
<li>All machines used by a ''Contractor'' to fabricate metal panels shall be owned by a ''Contractor'', and shall be accepted by the '''''Guarantor'''''.
<li>Site-forming metal panel machines
<ol>
<li>must be certified annually by a third-party engineer,
<li>must be serviceable, maintained and calibrated with supporting documentation, and
<li>records documenting the serviceable condition of the machine must be submitted annually to the '''''Guarantor'''''.
</ol></li>
<li>''Contractors'' who own metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.
<li>the ''Contractor'' must provide a mill certification for all metal roofing ''projects'' installed under the '''''RoofStar Guarantee Program'''''.
<li>Mill certificates must confirm that the sheet metal used for forming metal panels and ''linear metal flashings'' conform to or exceeds the requirements in [[#9.2.1.1. Panel Grade, Gauge, and Selection | Article 9.2.1.1.]]
</ol></li>

====9.2.1.3.{{hilite | Pre-painted Finishes|| 2022-February-5 }}====

<ol>
<li>{{hilite | When a painted finish on G90 galvanized or AL-Zn alloy coated steel panels is specified, SMP pre-painted finishes are permissible but|| 2022-February-5 }} {{hilite | PVDF (polyvinylidene fluoride, also referred to as PVF2) is strongly recommended for durability and resilience|| 2022-February-5 }}.
</li></ol>

====9.2.1.4.{{hilite | Fasteners|| 2022-February-5 }}====
(See also [[#3.2.2.1. Fasteners | Article 3.2.2.1.]])

<ol>
<li>Fasteners used to secure metal panels or clips must be
<ol>
<li>specified by the ''Design Authority'',
<li>compatible with the material they contact,
<li>appropriately sized, in both length and thread type, for the material to which they will be secured, and
<li>corrosion-resistant screws with a low-profile head.
</li></ol>
</li></ol>

====9.2.1.5.{{hilite | Clips {{hilite | and Bearing Plates || 2025-January-31 }}|| 2022-February-5 }}====
(See [[Notes to ASM Standard#A-9.2.1.5.| Note A-9.2.1.5.]])

<ol>
<li>Clips must be
<ol>
<li>{{strike| proprietary (not shop fabricated) || 2024-February-1 }} {{hilite | engineered || 2025-January-31 }} and must be acceptable to the roll form machine manufacturer, for use with Architectural Sheet Metal Roof Systems, and
<li>compatible with the metal panel and other materials they contact.
</li></ol>
<li>Attachment clips for Architectural Sheet Metal Roof Systems shall be manufactured with evenly spaced indents or guide holes for fastener placement, and {{strike| must || 2024-February-1 }} {{hilite | may || 2025-January-31 }} be formed from
<ol>
<li>Steel (Z275 or G90)(AZ50 or AZM150),
<li>Aluminum, or
<li>Stainless Steel.
</li></ol>
<li>{{hilite | Bearing plates shall be || 2025-January-31 }}
<ol>
<li>{{hilite | sufficiently rigid to resist distortion in service, and || 2025-January-31 }}
<li>{{hilite | engineered and suitable to support all expected loads, including compression loads || 2025-January-31 }}.
</li></ol>
</li></ol>

===={{hilite | 9.2.1.6. {{strike| Bearing Plates and || 2024-February-1 }} EPDM Pads || 2025-January-31 }}====

<ol>
{{strike| <li>{{hilite | Bearing plates shall be || 2023-June-16 }}
<ol>
<li>{{hilite | manufactured from corrosion-resistant steel, || 2023-June-16 }}
<li>{{hilite | of sufficient gauge to resist distortion under load, conforming to the engineered shop drawings, || 2023-June-16 }}
<li>{{hilite | formed with recesses for fasteners, || 2023-June-16 }} and
<li>{{hilite | press-formed to bevel the edges, for load distribution over the substrate. || 2023-June-16 }}
</li></ol> || 2024-February-1 }}
<li>{{hilite | EPDM pads used to support panel clips|| 2021-June-30 }}
<ol>
<li>{{hilite | must be sufficiently dense and thick (after compression)|| 2021-June-30 }}
<ol>
<li>{{hilite | to equal the thickness of the ventilation layer (Ref. [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]),|| 2021-June-30 }} and
<li>to resist curling when placed under load.
</li></ol>
<li>shall extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
</li></ol>

====9.2.1.7. {{hilite |Sealants|| 2022-February-5 }}====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</li></ol>
<li>Sealants shall conform to any one of the following standards:
<ol>
<li>CGSB 19-GP-5M, "Sealing Compound, One Component, Acrylic Base, Solvent Curing"
<li>CAN/CGSB-19.13, "Sealing Compound, One Component, Elastomeric, Chemical Curing"
<li>CGSB 19-GP-14M, "Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing"
<li>CAN/CGSB-19.24, "Multi-Component, Chemical Curing Sealing Compound"
</li></ol>
</li></ol>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the roof surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1., "Use of Accepted Materials"]]).
<li>The ''Contractor'' must retain factory packaging or provide other adequate covering for metal panels, to protect them from condensation between adjacent surfaces, until the panels are installed.
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Roof Panel Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer''.
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite | be constructed only with RoofStar-accepted panels secured by hidden clips; flange-fastened panels are not permitted|| 2022-February-5 }}.
</li></ol>
</li></ol>

===9.3.2. All Systems===
===={{hilite | 9.3.2.1. Preparation of Substrate || 2023-June-16 }}====

<ol>
<li>All supporting decks must be acceptable to the ''manufacturer'' and must be
<ol>
<li>made suitable for roofing by others (trades other than the ''Contractor''),
<li>dimensionally stable,
<li>structurally sound,
<li>capable of accommodating ''roof system'' component movement,
<li>clean,
<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[ASM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
<li>reasonably smooth and free of abrupt elevation changes, and
<li>absolutely free of
<ol>
<li>dust,
<li>dirt,
<li>voids,
<li>open cracks,
<li>sharp projections,
<li>contaminants,
<li>objectionable surface treatments,
<li>laitance (concrete must be “native”),
<li>oil, and
<li>grease
</li></ol>
</li></ol>
<li>All concrete decks must cure at least 28 days before receiving adhered membranes, but this limitation may be reduced if both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record ("adhered", as used in this requirement, means fully or intermittently bonding any membrane to the deck with an adhesive, hot asphalt (bitumen), or heat),
<li>Plywood decks with cracks or loose knots must be filled or overlaid with plywood (See [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]).
<li>Joints between plywood deck panels must be prepared and reinforced according to the manufacturer’s published requirements.
<li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
</li></ol>

====9.3.2.2. Preparation of Roofing Materials====

<ol>
<li>{{hilite | Roofing materials must be prepared for installation as required by the ''manufacturer''. || 2023-June-16 }}
</li></ol>

====9.3.2.3. General Requirements for Panel Installation====

<ol>
<li>Panels must be handled with non-marring slings and hoisted using a spreader bar.
<li>Sheet steel, copper, and zinc roof panels must be installed with a continuous minimum tolerance gap of 1/8” between the heels of the panels.
</li></ol>

====9.3.2.4. Panel Securement and Seams====

<ol>
<li>Panels must be secured to resist
<ol>
<li>{{hilite | ''Specified Wind Loads'' calculated for the ''roof system'' and shall conform to the specified design for the ''roof assembly'', and || 2023-June-16 }}
<li>{{hilite |gravitational (drag) loads|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All panels must be secured to a firm support, and when clips are used to secure metal panels, the clips must be firmly supported by the roof deck, bearing plates, EPDM pads, or an alternative acceptable to the '''''Guarantor''''' || 2023-June-16 }} (See [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>{{hilite | Clips that are unsupported by EPDM pads must be sealed against water intrusion by embedding the clips in a compatible sealant (Ref. || 2024-January-31 }} [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]; {{hilite | also Ref. || 2024-January-31 }} [[#9.3.2.5. Panels Over Ventilation Materials or Voids | Article 9.3.2.5.]]).
<li>Unless otherwise permitted by the '''''Guarantor''''', clips must be attached by at least two fasteners (Ref. [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]]).
<li>Concealed fasteners shall conform to the requirements in [[#9.2.1.4.Fasteners | Article 9.2.1.4.]], and should provide clearance for the underside of the metal panel.
<li>Seam height shall conform to the requirements in {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }} of this Part.
<li>{{hilite | Where sealant is required in panel seams (See {{hilite | '''Table 9.1.3.3.-A''' || 2026-February-1 }}), it shall be applied to evenly engage the top of the seam where panels join, as illustrated in '''Figure 9.3.2.4.-A.''' || 2025-January-31 }}
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 9.3.2.4.-A Butyl Sealant in Seams''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 9.3.2.4.(7) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:ASM Figure 9.3.2.4.-A.png|class=img-responsive | link=https://rpm.rcabc.org/images/6/6b/ASM_Figure_9.3.2.4.-A.png | 500 px]]
|}

====9.3.2.5. Panels Over Ventilation Materials or Voids====
(See [[#9.2.1.6. Bearing Plates and EPDM Pads | Article 9.2.1.6.]])

<ol>
<li>When the roof is designed and constructed with {{hilite | a void or ventilation materials immediately beneath the metal panels, panels must be secured using|| 2021-June-30 }}
<ol>
<li>standard-height clips (matching the height of panel seams), which must be {{strike| fully supported || 2024-January-25 }} {{hilite | installed || 2025-January-31 }} {{hilite | on engineered bearing plates fully supported by appropriately sized || 2025-January-31 }} closed-cell {{hilite | EPDM {{strike| foam || 2024-January-24 }} pads|| 2025-January-31 }}, or
<li>{{hilite |tall clips, which must be|| 2021-June-30 }}
<ol>
<li>{{hilite |fabricated to match the combined height of the {{hilite | bearing plate || 2025-January-31 }}, EPDM {{strike| foam || 2024-January-24 }} pad, and the panel seam,|| 2021-June-30 }}
<li>secured with fasteners into their supports, and
<li>fully embedded in a compatible sealant (See [[#9.2.1.7. Sealants | Article 9.2.1.7., "Sealants"]]).
</li></ol>
</li></ol>
<li>EPDM foam pads employed to support standard-height panel clips are not a RoofStar-accepted material but nevertheless must
<ol>
<li>be fabricated with sufficient density and thickness (after compression) to equal the thickness of the ''ventilation layer'', and
<li>extend no less than 6.35 mm (1/4”), and no more than 19.05 mm (3/4”), past the edges of the bearing plate it will support.
</li></ol>
<li>{{hilite |When the ''roof system'' design specifies a ventilation space beneath panels that are not supported by a ''ventilation layer'', panels shall be supported by tall clips secured in keeping with the requirements in this Part|| 2021-June-30 }}.
</li></ol>

====9.3.2.6. Panel Terminations====

<ol>
<li>Metal panels must be secured at, {{hilite | and engaged to|| 2021-June-30 }}, the eaves by a continuous metal hook strip (see [http://rpm.rcabc.org/index.php?title=ASM_10.1.1_Eave_%26_Rake_Flashing_(Mechanical_Seam) ASM 10.1.1 Eave & Rake Flashing (Mechanical Seam)]).
<li>{{hilite | All panel terminations at the top of a slope must be|| 2021-June-30 }}
<ol>
<li>turned up (bread-panned) to {{hilite | match the panel seam|| 2021-June-30 }} height, and shall not be cut, and
<li>{{hilite |flashed with a positively shedding cap, hip or ''wall'' flashing (see [[#10.3.4. Perimeter Details, Walls, and Openings | Subsection 10.3.4., "Perimeter Details, Walls, and Openings"]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |When panels terminate at the top of a ''common slope'' or ''low slope'' roof (slopes up to and less than 1:1 (12” in 12”)), they must be closed with additional metal Z-closure|| 2021-June-30 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened to the metal roof panel, or fastened through the panel into the ''deck'' when the fasteners also serve as drag load securement|| 2021-June-30 }}.
</li></ol>
</li></ol>

====9.3.2.7. Reserved====
====9.3.2.8. Curved Panels====
(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])

<ol>
<li>All panels manufactured for a curved substrate
<ol>
<li>must be supported by a Variance issued by the '''''Guarantor''''' prior to tender (see [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1.]]),
<li>must be power-curved as a continuous panel, without segments,
<li>shall be manufactured with seams conforming to [[#9.1.3.3. Panel Seams | Article 9.1.3.3.]], and
<li>must continuously cover a curved substrate (segmented panels are not permissible).
</li></ol>
<li>Roofs constructed with curved panels must incorporate a ventilation space in keeping with [[#8.1.3.5. Ventilation Beneath Panels | Article 8.1.3.5.]]
</li></ol>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify {{hilite | the connections between the ''roof system'' and ''walls'' or other building components, particularly where the continuity of air, vapour and water-resistive layers is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]|| 2021-October-30 }}).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>{{hilite | Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in || 2023-June-16 }} [[Division_C | Division C]].
<li>{{hilite | Where the roof deck and an adjoining wall are constructed of dissimilar materials (i.e., steel deck joined to concrete wall), differing expansion and contraction rates for the two materials may adversely affect the roof system and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular roof-wall intersection || 2023-June-16 }} (See [[Notes to ASM Standard#A-10.1.3.1. | Note A-10.1.3.1. ]]).
<li>{{hilite | When EIFS cladding is cut to permit roofing work, the exposed insulation must be restored with back-wrapped mesh, a base coat and finish coat, or with another method that is equal or superior|| 2022-October-22 }} (See [[Notes to ASM Standard#A-10.1.2.2| Note A-10.1.2.2]]).
<li>Fascia may be covered with metal flashing and specified as part of the ''roof system''.
</li></ol>

====10.1.3.2. Flashing====

<ol>
<li>All changes in plane in the ''roof system'', and all intersections between the roof field and roof edges, ''walls'', or ''parapets'', must be flashed with {{hilite | material conforming to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]] {{strike| self-adhering sheet membrane eave protection, and with metal flashing || 2023-January-26 }}
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings designed for ''common slope'' and ''low slope'' roofs (slopes up to and including 1:1 (12” in 12”)) must be secured with hooked metal Z-closures which are || 2021-June-23 }}
<ol>
<li>{{hilite | set in two (2) rows of gunnable sealant or sealant tape|| 2021-June-30 }}, and
<li>{{hilite | fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Cap and hip flashings designed for ''steep slopes'' (roofs with a slope greater than 1:1 (12” in 12”)) may be|| 2021-June-30 }}
<ol>
<li>{{hilite | secured with metal Z-closures installed in keeping with the requirements in [[#10.3.4.1. Ridges | Article 10.3.4.1.]]|| 2021-June-30 }}, or
<li>{{hilite | secured to the standing seams with acceptable fasteners (flashing may be turned down between panel ribs to close off openings, to provide further protection from the weather)|| 2021-June-30 }}.
</li></ol>
</li></ol>

====10.1.4.2. Eave and Rake Edges====

<ol>
<li>Eave and rake edge details shall
<ol>
<li>be designed to resist wind uplift loads, and shall conform to the requirements in [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]], and
<li>{{hilite | permit the drainage of any liquid water out of the roof system (Ref. || 2023-October-28 }} [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====10.1.4.3. Walls====

<ol>
<li>Roof-to-wall flashings must
<ol>
<li>be engineer-designed to resist wind uplift, and
<li>allow for expansion and contraction.
</li></ol>
<li>All connecting flashings must be firmly secured
<ol>
<li>{{hilite |to a ''wall'' using a concealed continuous clip fastened at intervals not exceeding 304.8 mm (12”) O.C. (exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite |to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape, and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
</li></ol>

====10.1.4.4. Reserved====
====10.1.4.5. Windows and Wall Openings====

<ol>
<li>{{hilite | Windows and other wall openings adjacent an Architectural Sheet Metal Roof System shall conform to the relevant requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", || 2023-June-16 }} [[SBS_Roof_Systems_Standard#10.1.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.1.4.5.]].
</li></ol>

===10.1.5. Valleys===
====10.1.5.1. {{hilite | General Requirements for Valleys || 2026-February-1 }}{{strike| Valley Protection Membrane || 2025-February-1 }}====

<ol>
<li>{{hilite | Valleys should not terminate downslope at a wall or curb || 2026-February-1 }}.
<li>{{hilite | When the slope of a valley is less than 1:6 (2” in 12”) the ''Design Authority'' should consider designing the valley with a waterproofing membrane system rather than with a self-adhering underlayment and metal valley flashing || 2026-February-1 }} {{hilite | (See|| 2026-February-1 }} [[Notes to ASM Standard#A-9.2.1.1.(5)(2) (Metal Panels and the Coefficient of Thermal Expansion) | {{hilite | Note A-10.1.5.1.(2)|| 2026-February-1 }}]]).
{{strike| <li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]] || 2025-February-1 }}
</li></ol>

====10.1.5.2. Valley {{hilite | Protection || 2026-February-1 }}{{strike| Flashing || 2025-February-1 }}====

<ol>
<li>All valleys must be designed with both membrane flashing and metal valley flashing.
<li>Valley protection membrane shall conform to the requirements in [[#8.1.3.1. Eave Protection | Article 8.1.3.1.]] and [[#8.1.3.2. Valley Protection | Article 8.1.3.2.]]
<li>Metal flashing must
<ol>
<li>incorporate a divider measuring at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider, and
<li>be secured to resist gravitational ("drag") loads.
</li></ol>
<li>Metal valley flashing shall be at least 127 mm (5") wide, measured between the divider and the edge of the metal roof panel, and may be either hooked or unhooked (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]).
</li></ol>

====10.1.5.3. Valleys for Heavy Snow Loads====

<ol>
<li>In regions with high snow loads, the minimum valley width should be increased and flared to widen at the eave (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]], and [[#10.1.5.1. Valley Protection Membrane | Article 10.1.5.1.]]).
</li></ol>

====10.1.5.4. Reserved====
====10.1.5.5. {{hilite | Crickets and|| 2026-February-1 }} Dead Valleys====
{{hilite | (See '''Figure 10.1.5.5.-A''' and '''Figure 10.1.5.5.-B''')|| 2026-February-1 }}

<ol>
<li>{{hilite | When terminating a valley at a ''wall'' or ''curb'' is unavoidable, the design must incorporate a cricket covered with a ''waterproofing roof system'', to divert water off the roof|| 2026-February-1 }}.
<li>{{hilite | Dead valleys should be avoided|| 2023-June-16 }}{{hilite |, but {{hilite | when a cricket is not practicable and|| 2026-February-1 }} roof slope terminates in a dead valley, it must be designed as a ''waterproofing roof system'' {{strike| the design must conform to the Application requirements in || 2023-June-16 }} [[#10.3.5.7. Dead Valleys | Article in 10.3.5.7.]] || 2025-February-1 }}
<li>{{hilite | All ''waterproofing roof systems'' used on crickets or in dead valleys must be carried up the vertical face of ''wall'' and ''curbs'' at least 304.8 mm (12”) when measured vertically from the ''drainage plane'', and any ''wall'' finishes must be terminated at least 203.2 mm (8”) above the cricket or dead valley, when measured vertically from the ''drainage plane'' || 2026-February-1 }} (See [[#10.3.5.7. Dead Valleys | {{hilite | Article in 10.3.5.7.|| 2026-February-1 }}]] and [[#10.3.7.2. Intersections with Waterproofing Roof Systems | {{hilite | Article 10.3.7.2.|| 2026-February-1 }}]]).
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5.-A Crickets and Dead Valleys''' Forming Part of Sentence 10.1.5.5.(1) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 10.1.5.5-B Crickets and Waterproofing to Improve Drainage''' Forming Part of Sentence 10.1.5.5.(2) || 2026-February-1 }}(Click to expand)
|-
| [[File:ASM Figure 10.1.5.5.-A.png | link=https://rpm.rcabc.org/images/0/0e/ASM_Figure_10.1.5.5.-A.png | 400 px]] || [[File:ASM Figure 10.1.5.5.-B.png | link=https://rpm.rcabc.org/images/5/51/ASM_Figure_10.1.5.5.-B.png | 400 px]]
|}

==={{hilite | 10.1.6. Expansion and Control Joints || 2024-October-20 }}===
====10.1.6.1. Reserved====

====10.1.6.2. Control Joints====

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (roof dividers), and
<li>to specify their location and design.
</li></ol>
<li>{{hilite | Unless otherwise approved by the '''''Guarantor''''', ''control joints'' must be specified to divide a new ''roof system'' (addition) from existing ''roof systems'' || 2023-June-16 }} (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Roof Systems===
====10.1.7.1. Intersections with Waterproofing Roof Systems====

<ol>
<li>Intersections with ''water-shedding roofs'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Intersections with Membrane Gutters====

<ol>
<li>Refer to [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membrane====

<ol>
<li>{{hilite | Where a self-adhered membrane is required for flashing, it shall conform to the requirements for eave and valley protection in || 2024-January-31 }}{{hilite | {{strike| See || 2023-January-25 }} [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] {{strike| for sheet membrane requirements. || 2023-January-26 }}|| 2021-June-30 }}
<li>{{hilite | Where the ''roof assembly'' adjoins a ''wall'', the ''wall'' must be flashed to provide continuity with the wall ''control layers'', and with the ''roof system'' underlayment using materials accepted by the '''''Guarantor''''' and having the following properties: || 2024-January-31 }}
<ol>
<li>{{hilite | When the primary slope of the roof is less than 1:6 (2" in 12"), flashing must be a self-adhered membrane with a minimum thickness of 3 mm (118 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is 1:6 (2" in 12") or greater but less than 1:3 (4" in 12"), flashing must be an exterior-reinforced self-adhered membrane with a minimum thickness of 1 mm (39 mils). || 2024-January-31 }}
<li>{{hilite | When the primary slope of the roof is greater than 1:3 (4" in 12"), flashing material may be self-adhered or nail-applied. || 2024-January-31 }}
</li></ol>
{{strike| <li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm. || 2023-January-26 }}
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into roof perimeters and walls must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, ''Linear Metal Flashing'']]
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''linear metal flashing'' shall conform to the requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]]
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====
<ol>
<li>All wall surfaces to which roofing materials must be installed (including Concrete Masonry Unit (CMU)) must be declared suitable by the ''manufacturer'', or they must be covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membrane flashing shall be prepared following the ''manufacturer's'' published requirements.
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>All changes in plane in the ''roof assembly'' must be waterproofed beneath metal flashing with a self-adhering eave protection sheet membrane acceptable to the '''''Guarantor'''''.
<li>''Projects'' must follow proper sequencing so that materials, ''systems'', or ''assemblies'', installed by the ''Contractor'' correctly interface with materials, ''systems'', or ''assemblies'' installed by other trades, to establish or preserve continuity and ensure positive waterproofing connections (overlapping, “shingle fashion”).
<li>When coordination with other trades requires some adaptation to the requirements in this Standard, any variance to proper detail sequencing must be approved in writing by the ''Design Authority''.
<li>{{hilite | All sheet membrane flashing must be installed to conform to the ''manufacturer's'' published instructions, and must|| 2021-October-30 }}
<ol>
<li>{{hilite | conform to the material requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membrane | Article 10.2.1.1.]],
<li>{{hilite | be ''fully bonded'' to an acceptable substrate,|| 2021-October-30 }}
<li>{{hilite | be installed without fish-mouths or wrinkles|| 2021-October-30 }},
<li>{{hilite | be hand-rolled with a ''manufacturer’s'' accepted roller and ''fully bonded'' to an acceptable, prepared substrate|| 2021-October-30 }},
<li>be reinforced at all inside and outside corners with membrane gussets, measuring at least 101.6 mm x 152.4 mm (4” x 6”), excluding the tapered ends,
<li>overlap any wall membranes or finishes by at least 50.8 mm (2”), and
<li>underlap any wall membranes or finishes by at least 76.2 mm (3").
</li></ol>
<li>{{hilite | The upper termination of sheet membrane flashing must be protected from damage, and from water intrusion, || 2023-June-16 }}
<ol>
<li>{{hilite | with linear metal flashing installed in keeping with || 2023-June-16 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]], or
<li>{{hilite | with a wall finish installed by others. || 2023-June-16 }}
</li></ol>
<li>When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination.
<li>When sheet membrane flashing is mechanically secured with a termination bar or a metal flashing, fasteners must be spaced no more than 304.8 mm (12”) O.C.
<li>When a second metal flashing is installed to protect a termination bar or flashing used to secure the sheet membrane flashing, it may be fastened no more than 609.6 mm (24”) O.C., provided the ''linear metal flashing'' maintains continuous contact with the substrate.
<li>When closer fastener spacing is required by the ''manufacturer'', the wall must be constructed or modified to facilitate solid fastener securement.
<li>''Linear metal flashings'' must be secured in keeping with the requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.3.1.]]
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>Membrane flashing must be protected from damage with full-coverage ''linear metal flashing''.
</li></ol>

===10.3.3. Reserved===
===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Ridges====

<ol>
<li>{{hilite | All cap and hip flashings installed on slopes 1:6 (2" in 12") up to and less than 1:1 (12” in 12”)|| 2021-June-30}} must be hooked to metal Z-closures which are
<ol>
<li>set in two (2) rows of gunnable sealant or sealant tape, and
<li>fastened through the metal roof panel into the deck.
</li></ol>
<li>{{hilite | Cap and hip flashings installed on roofs with a slope greater than 1:1 (12” in 12”) (''Steep Slopes'') may be|| 2021-June-30}}
<ol>
<li>{{hilite | hooked to a metal Z-closure|| 2021-June-30}}, and
<li>{{hilite | mechanically fastened to the standing seam with an acceptable fastener|| 2021-June-30 }}.
</li></ol>
<li>For roof slopes
<ol>
<li>up to 2:3 (8” in 12”), metal cap/hip flashing must extend a minimum of 152.4 mm (6") over metal roof panels, measured from the back pan, and extending on each side of the ridge/hip.
<li>equal to or greater than 2:3 (8” in 12”), the metal cap/hip flashing may be reduced by 76.2 mm (3”) over metal roof panels, measured from the back pan and extending on each side of the ridge/hip.
<li>greater than 1:1 (12” in 12”), an underlying support at the centre of the ridge is required to support the ridge cap flashing.
</li></ol>
</li></ol>

====10.3.4.2. Eaves and Rake Edges====
(See Construction Detail [[ASM Eave and Rake Edges (Mechanical Seams) | "Eave and Rake Edges (Mechanical Seams)"]])

<ol>
<li>All linear metal flashing installed at the eave or rake edges must
<ol>
<li>be completely separated from a wood ''deck'' with eave protection sheet membrane (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]]), and
<li>allow for metal panel expansion and contraction.
</li></ol>
<li>Eave protection sheet membrane installed to separate eave and rake edge metal flashing from a wood ''deck'' shall extend past the edges of a flashing by at least 6.35 mm (1/4").
<li>Eave metal flashing
<ol>
<li>must be fabricated to secure the eave edge of the panel in place,
<li>shall extend onto the sloped ''deck'' or supporting member at least 76.2 mm (3”),
<li>shall be secured
<ol>
<li>along the top flange with screws spaced in accordance with the engineered design but no further apart than 304.8 mm (12”) O.C.,
<li>on the fascia metal flashing, utilizing a continuous clip fastened a maximum of 304.8 mm (12") O.C., and
<li>shall be covered with eave protection sheet membrane.
</li></ol>
<li>When external metal gutters are installed (See [[#11.3.3.9. External Gutters | Article 11.3.3.9.]]), linear metal eave flashing with a face less than 50.8 mm (2”) do not require a clip but must be securely fastened with an alternative method acceptable to ''Design Authority''.
</li></ol>
<li>Rake edge metal flashing must be firmly secured
<ol>
<li>{{hilite | to a ''wall'' using a concealed continuous clip fastened a maximum of 304.8 mm (12”) O.C. (Ref. [[#Part 13 - Linear Metal Flashing | Part 13]] for clip requirements; exposed fasteners are not permitted)|| 2021-June-30 }}, or
<li>{{hilite | to the metal panels using|| 2021-June-30 }}
<ol>
<li>{{hilite | a metal Z-closure set in two (2) rows of gunnable sealant or sealant tape and fastened through the metal roof panel into the ''deck''|| 2021-June-30 }}, or
<li>{{hilite | exposed fasteners installed through the flashing into panel ribs|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Where external metal gutters will be installed, the eave metal flashing should be installed to accommodate the gutter and hangar.
<li>When gutter hangars are to be fastened behind the eave flashing, the eave flashing does not require a continuous clip and may be face-screwed together with the gutter hangar.
</li></ol>
</li></ol>

====10.3.4.3. Reserved====
====10.3.4.4. Reserved====
====10.3.4.5. Windows and Wall Openings====

<ol>
<li>Windows and other wall openings that intersect with the ''roof system'' shall be flashed with membrane and metal conforming to the requirements in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.4.5._Doors.2C_Windows.2C_and_Wall_Openings | Article 10.3.4.5.]]
</li></ol>

===10.3.5. Valleys===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.5.1. Valley Protection====

<ol>
<li>{{hilite | ''Valley protection'' membrane must be installed in keeping with the requirements in [[#8.3.2.2. Valley Protection | Article 8.3.2.2.]]|| 2021-June-30 }}
</li></ol>

====10.3.5.2. General Requirements for Valley Metal Flashing====

<ol>
<li>Drag load fastening is mandatory on all valleys.
<li>Metal valley panels must
<ol>
<li>be installed shingle fashion,
<li>overlap the adjacent lower panel at least 203.2 mm (8"), and
<li>be sealed at the lapped joint with two horizontal rows of approved sealant.
</li></ol>
<li>Valley dividers are required and must be at least 25.4 mm (1") high, folded to a maximum of 60 degrees on the inside angle of the divider.
<li>Exposed valleys must be at least 254 mm (10") wide (no less than 127 mm (5") per side, measured from the divider to the metal roof panel); wider valleys are recommended in high snow load areas (See [[#1.1.3.2. Snow Loads | Article 1.1.3.2., "Snow Loads"]] and [[#10.1.5.3. Valleys for Heavy Snow Loads | Article 10.1.5.3.]]).
<li>{{hilite | Metal valley sections (hooked or unhooked) || 2023-June-16 }}
<ol>
<li>must overlap the section immediately down-slope at least 203.2 mm (8"),
<li>shall be embedded in at least two rows of an acceptable sealant or butyl tape where they overlap,
<li>shall be secured in keeping with the specified design, and
<li>shall be flashed ("stripped in") and sealed to the ''valley protection'' membrane with eave protection sheet membrane conforming to [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]],
<ol>
<li>measuring at least a 304.8 mm (12”) in width, and
<li>applied to extend past the flashing fasteners by at least 38.1 mm (1-1/2”).
</li></ol>
</li></ol>
<li>Reverse laps must be sealed with a membrane-compatible sealant.
</li></ol>

====10.3.5.3. Hooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.1_Hooked_Valley_Flashing ASM 10.3.1 Hooked Valley Flashing])

<ol>
<li>Hooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.3. Hooked Metal Valleys | Article 10.3.5.3.]],
<ol>
<li>be fabricated with a built-in hook strip returned 38.1 mm (1-1/2") to
<ol>
<li>form a water cut-off, and
<li>hook onto the valley metal panel, and
</li></ol>
<li>incorporate a flange measuring at least 76.2 mm (3”) wide, to secure the metal valley flashing to its substrate.
</li></ol>
</li></ol>

====10.3.5.4. Unhooked Metal Valleys====
(see also [http://rpm.rcabc.org/index.php?title=ASM_10.3.2_Unhooked_Valley_Flashing ASM 10.3.2 Unhooked Valley Flashing])

<ol>
<li>Unhooked metal valley sections shall, in addition to the general requirements in [[#10.3.5.4. Unhooked Metal Valleys | Article 10.3.5.4.]],
<ol>
<li>be hemmed with a return measuring at least 38.1 mm (1-1/2") to form a water cut-off, and
<li>secured with continuous cleats
<ol>
<li>be fabricated from 26-gauge flat metal stock (min. thickness), and
<li>be fabricated with a leg measuring at least 76.2 mm (3”) wide.
</li></ol>
</li></ol>
</li></ol>

====10.3.5.5. Reserved====
====10.3.5.6. Reserved====
====10.3.5.7. Dead Valleys====

<ol>
<li>Dead valleys must be
<ol>
<li>waterproofed to conform to the requirements for membrane gutters (See [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]), and
<li>sloped at least 1:50 (2%, or 1/4” in 12”), to positively drain
<ol>
<li>into one or more roof drains{{hilite |, or || 2021-February-7 }}
<li>onto a lower ''water-shedding'' roof.
</li></ol>
</li></ol>
<li>{{hilite | Transitions from a dead valley to the metal panel system must conform to the requirements in [[#10.3.7.2. Intersections with Waterproofing Roof Systems | Article 10.3.7.2.]], and where a wall is present, a diverter shall be incorporated to protect the ''wall system''.|| 2021-February-7 }}.
</li></ol>

===10.3.6. Reserved===

===10.3.7. Intersections with Other Roof Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where two ''roof systems'' intersect, materials must be compatible with each other, or must be separated from contact by an intermediate separation layer.
</li></ol>

====10.3.7.2. Intersections with Waterproofing Roof Systems====

<ol>
<li>When a ''waterproofing roof system'' transitions down a slope onto a lower ''water-shedding roof system'', the ''waterproofing roof system'' membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the maximum water level,
<li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'', or
<li>304.8 mm (12”) plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically from the ''drainage plane'' or maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing roof system'' sheet membrane flashing on the slope must be mechanically secured, separately from the water-shedding ''roof system'',
<li>''underlayment'' must overlap the ''waterproofing roof system'' sheet membrane flashing by no less than 101.6 mm (4”),
<li>{{hilite |metal panels must overlap the ''waterproofing roof system'' sheet membrane flashing by at least 152.4 mm (6”) (A metal counter-flashing with an exposure of at least 101.6 mm (4”) is required at the bottom termination of the metal panels|| 2021-June-30}}), and
<li>fasteners for the ''water-shedding roof system'' must be at least 203.2 mm (8”) above the ''finished system surface'' of the ''waterproofing roof system'' (when measured vertically), or 304.8 mm (12”) for regions with heavy snow.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Intersections with Membrane Gutters====

<ol>
<li>Refer to the requirements in [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</li></ol>

===10.3.8. Reserved===

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=

==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary roof drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''roof assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a drain leader and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and
<li>{{hilite |which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.|| 2020-July-3 }}
</li></ol>
<li>''Primary roof drain'' means the primary means of draining water from the roof.
<li>''Roof drain'' means “A fitting or device that is installed in the roof to permit storm water to discharge into a ''leader''.” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("Scupper") means an open or closed roof drain that conveys water laterally from one roof area to another, or from the roof directly to the exterior of the building.
<li>''Secondary roof drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary roof drain''. An ''overflow drain'' is a type of ''secondary roof drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>All ''projects'' intended to qualify for a '''''RoofStar 15-year Guarantee''''' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
<li>The ''Design Authority'' is responsible for the design of roof drainage.
<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} {{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }} {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
<li>{{hilite |The size (flow rate) of roof drains and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }} {{hilite | (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location)|| 2027-February-1 }}.
<li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li>drain type, size, flow rate, and
<li>size and placement of the ''overflow drain''.
</ol></li>
<li>{{hilite |The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation) || 2021-October-23 }}
<ol>
<li>roof slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>{{hilite | the location of the ''drainage plane''|| 2021-October-30 }} {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished system surface'', {{hilite | and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design|| 2021-October-30 }}).
</li></ol>
<li>Roofs may drain off a roof edge, or by means of internal plumbing (both are permissible under the '''''RoofStar Guarantee Program''''').
<li>When a roof is designed to drain off an edge, water may drain freely, it may be diverted to a lower roof area, or it may be collected and diverted into a drainage system (plumbing) by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]).
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.
<li>When a roof is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow restrictor is present in an existing cast drain leader, the restrictor should be reinstalled.
</li></ol>

====11.1.3.2. Roof Drain Function and Location====

<ol>
<li>Roof drains must be used only for draining water.
<li>''Roof drains'' on new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>When existing ''roof drain'' and penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3.,"All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast-iron Roof Drains====

<ol>
<li>Only cast-iron roof drains, and existing external couplers used to connect drains to leaders, may be re-used for roof replacement ''projects''.
<li>Drain extensions for cast-iron roof drains should be avoided, since the connection with the cast drain is not sealed; the result is a leak into the roof system.
</li></ol>

====11.1.4.2. Scuppers and Overflows====
(See [[Notes to ASM Standard#A-11.1.4.2. | Note A-11.1.4.2.]])

<ol>
<li>A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}..
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the roof, in the event of ''primary roof drain'' failure.
<li>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be
<ol>
<li>located no higher than 101.6 mm (4”) above {{hilite | the ''drainage plane''|| 2021-October-30 }},
<li>situated so that they freely and visibly discharge storm water, and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>

====11.1.4.3. Membrane Gutters====
(See [[Notes to ASM Standard#A-11.1.4.3. | Note A-11.1.4.3.]])

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' {{hilite | (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) || 2023-June-16 }} only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>{{hilite | The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to|| 2020-July-3 }}
<ol>
<li>{{hilite | rainfall and snow load calculations for the building location|| 2020-July-3 }},
<li>{{hilite | drain type, size, and flow rate|| 2020-July-3 }}, and
<li>{{hilite | size and placement of the ''overflow drain''|| 2020-July-3 }}.
</li></ol>
<li>New membrane ''gutters'' shall be designed with a minimum width of 304.8 mm (12”) and a depth not exceeding the ''gutter’s'' width.
<li>At least 101.6 mm (4") clearance on the horizontal plane is required between any membrane ''gutter'' wall and the
<ol>
<li>the edge of the drain bowl for spun drains, and
<li>the edge of the drain leader for flat spun or welded drains.
</ol></li>
<li>Only fully-adhered membranes may be used in membrane ''gutters''.
<li>Metal ''gutter'' liners are permissible, provided they are designed to fit over acceptable waterproofing, and the liners conform to the material requirements in [[#11.2.1.3. Membrane Gutters and Gutter Liners | Article 11.2.1.3.]]
<li>''Conventionally insulated systems'' that drain into a membrane ''gutter'' must abut solid blocking at the ''gutter'' edge, which provides
<ol>
<li>a stop for the insulation ''assembly'', and
<li>a solid substrate for the securement of flashings and membranes.
</ol></li>
<li>An ''overflow drain'' must be located at least
<ol>
<li>101.6 mm (4”) above the primary membrane ''gutter'' drain, and
<li>25.4 mm (1”) below any mechanical fasteners used to secure the adjoining ''roof system''.
</ol></li>
<li>In roof replacement applications, existing membrane ''gutters'' may qualify for a '''''RoofStar Guarantee''''', but should be redesigned if their capacity is undersized, and must incorporate an overflow drain in keeping with the requirements in this Part.
<li>Where the primary drain in an existing membrane ''gutter'' is undersized for its capacity, the primary drain must be replaced with one that is properly sized.
<li>When a membrane ''gutter'' adjoins a RoofStar-guaranteed ''water-shedding system'', the transition from gutter to ''roof system'' shall conform to [[#11.3.3.8. Membrane Gutters | Article 11.3.3.8.]]
</ol></li>

====11.1.4.4. External Gutters====

<ol>
<li>{{hilite | External gutters and downspouts are not covered by the '''''RoofStar Guarantee'''''|| 2021-June-30 }}.
<li>{{hilite | Notwithstanding other requirements in this Part, when a roof drains onto another roof, the drainage of water must be controlled to eliminate or mitigate damage from water flow || 2021-June-22 }}; {{hilite | the use of splash pads, when appropriate for the location, is strongly recommended|| 2021-June-30 }}.
<li>{{hilite |Downspouts, installed by the ''Contractor'' or other trades and laid directly against the slope of the roof to connect an upper roof drainage to lower gutters, is acceptable under the '''''RoofStar Guarantee Program''''', provided the material is strongly secured both at the top and the bottom, and the issue of dissimilar metal corrosion can be eliminated|| 2021-June-30 }}.
</li></ol>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>{{hilite | Except for cast-iron roof drains, which are usually supplied and installed by others, only new drains and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>{{hilite | All roof drains and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''|| 2026-July-1 }}.
<li>Reuse of any penetration flashing or drain (except serviceable cast iron drains) is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]])|| 2021-February-5 }}.
<li>{{hilite | Where drains or overflows are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}.
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to ASM Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All roof drains
<ol>
<li>must be designed and manufactured for roof applications only, and shall not be floor drains, and
<li>shall be made so that the roof membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast-iron ''primary roof drains''
<ol>
<li>must be supplied with a sump receiver and under-deck clamp,
<li>should separate securement of the under-deck clamp and clamping ring from securement for the strainer, and
<li>{{hilite | must be installed by the trade supplying the roof drain. || 2023-June-16 }}
</li></ol>
<li>{{hilite | Cast-iron ''scupper drains'' must be || 2023-June-16 }}
<ol>
<li>{{hilite | supplied with a clamping strainer, || 2023-June-16 }} and
<li>{{hilite | designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable). || 2023-June-16 }}
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li> must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li> must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>should incorporate a clamping ring (a clamping ring is recommended for ''primary flanged insert drains'' specified on any ''project''), but clamping rings are required when ''primary flanged insert drains'' are specified for a '''''RoofStar 15-year Guarantee'''''.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that connect with plumbing inside the building|| 2026-July-1 }} (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) {{hilite | that drain directly to the exterior of the building|| 2026-July-1 }} (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>{{hilite | stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”))|| 2026-July-1 }}.
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the drain to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the scupper,
<ol>
<li>equal in capacity to the main drain leader opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>{{hilite | must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but || 2026-July-1 }}
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>{{hilite | may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and|| 2026-July-1 }}
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.{{strike|, and || 2025-May-29 }}
</li></ol>
</li></ol>

====11.2.1.3. Membrane Gutters and Gutter Liners====

<ol>
<li>Membrane gutter membranes shall be
<ol>
<li>accepted by the '''''Guarantor''''',
<li>acceptable to the ''manufacturer'',
<li>compatible with the adjoining ''roof system'', and
<li>manufactured for full adhesion (semi-adhesion and mechanical securement are not permissible).
</ol></li>
<li>A reinforced liquid membrane systems (PMMA or PUMA) approved for field use and applied to an accepted SBS-modified base membrane is acceptable as a ''gutter'' membrane.
<li>A metal ''gutter'' liner
<ol>
<li>may be fabricated from
<ol>
<li>copper sheet material, incorporating soldered seams, or
<li>stainless steel, incorporating welded seams, and
</ol></li>
<li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</ol></li>
</ol></li>

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure the roof membrane and penetration flashings, or related accessories, must be
<ol>
<li>properly sized in accordance with ''roof system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>{{hilite | Only a RoofStar-accepted|| 2021-February-7 }} reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} liquid membrane flashing system may be used on the water plane to flash roof drains, scuppers, and overflows.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Roof Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Roof Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>Roof drains for new construction ''projects'' must be located at least 304.8 mm (12”) away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The 304.8 mm (12”) spacing requirement for roof drains does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>Roof drains and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the drain.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All roof drains must be supplied and installed with a secured strainer to prevent debris from blocking the drain.
</ol></li>

====11.3.2.4. Membrane Flashing====

<ol>
<li>Drains must be flashed using the membrane specified and installed to waterproof a gutter, and shall be acceptable to the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced {{hilite | two-component catalyzed polymethyl methacrylate (PMMA)|| 2021-February-7 }} may be used on the ''drainage plane'' to flash roof drains, ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains and Membrane Gutters===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====
====11.3.3.2. General Requirements for Cast-iron Roof Drains====

<ol>
<li>Cast-iron roof drains must be installed by the plumbing/mechanical trade.
<li>When cast-iron roof drains are used, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain.
<li>Drain extensions for cast-iron roof drains should be avoided.
<li>Existing flow restrictors removed during roof construction should be reinstalled.
<li>All cast-iron roof drains must be
<ol>
<li>new or clean,
<li>unbroken (this applies to the clamping ring also), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The continuity of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast-iron Drains Installed with Lead Flashing====

<ol>
<li>Cast-iron roof drains installed with lead flashing shall conform to the requirements of Article 11.3.3.3. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.4. Cast-iron Drains Installed with Membrane Flashing====

<ol>
<li>Cast-iron roof drains installed with sheet membrane flashing shall conform to the requirements of Article 11.3.3.4. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Cast-iron roof drains retrofitting shall conform to the requirements of Article 11.3.3.5. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flange-type roof drain installation shall conform to the requirements of Article 11.3.3.6. in the Standard for the membrane used to waterproof the drain.
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>''Scupper'' and ''overflow'' installation shall conform to the requirements of Article 11.3.3.7. in the Standard for the membrane used to waterproof their installation.
</li></ol>

====11.3.3.8. Membrane Gutters====

<ol>
<li>All ''gutter'' membrane construction shall conform to the requirements of Article 11.3.3.8. in the Standard for the membrane used in related waterproofing applications.
</ol></li>

====11.3.3.9. External Gutters====

<ol>
<li>When external gutters are attached to an Architectural Sheet Metal Roof System, they shall not interfere with the free movement of water or air away from the ''roof system''.
</ol></li>

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |be designed to utilize the split panel detail; flexible boot flashings secured with gasketed screws are not permitted|| 2022-February-5 }}, and
<li>{{hilite |specify two storm collars separated by no more than 76.2 mm (3”), for all penetration flashings that do not incorporate a settlement cap|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>{{hilite | Where a roof design includes openings through the ''roof assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall || 2024-June-15 }}
<ol>
<li>{{hilite | provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and || 2024-June-15 }}
<li>{{hilite | require a ''curb'' or an acceptable penetration flashing to enclose and seal each roof opening. || 2024-June-15 }} {{strike| must be enclosed and sealed with a ''curb'', or a penetration flashing || 2023-June-15 }}
</li></ol>
<li>{{hilite | Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others. || 2023-June-16 }}
<li>{{hilite | Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head|| 2020-July-3 }}.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration, and
<li>properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form a seal || 2023-January-25 }} {{hilite | around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2") || 2024-January-31 }}, or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration; the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>{{hilite | Cylindrical ("pipe-type") penetrations must be sealed with|| 2020-July-3 }}
<ol>
<li>{{hilite | the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,|| 2020-July-3 }}
<li>{{hilite | a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. "SBS" Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | 2-Part Retrofit Flashing (Cable Penetration)]])|| 2020-July-3 }}, or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Flexible boot flashings for pipe-type penetrations
<ol>
<li>may be used for penetrations up to 152.4 mm (6”) in diameter,
<li>should be located near the upper end of a slope for long panels,
<li>must not be located on the ''drainage plane'' when the roof slope is less than 1:6 (2” in 12”),
<li>must be located at or near the centre of metal roof panels, measured between the upstands, to avoid interference with standing seams or panel ribs, or in the alternative (when interference is unavoidable) on a raised panel above seam height,
<li>must be fastened with high-domed gasketed cladding screws placed no more than 38.1 mm (1-1/2") O.C., and
<li>must be set in a bed of sealant.
</li></ol>
</li></ol>

====12.1.3.2. Reserved====

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }}
<li>When a roof is replaced and existing penetration locations do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a written request for a Variance, as specified in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]].
</li></ol>

====12.1.3.4. Curbs and Sleepers====

<ol>
<li>The design and placement of curbs and sleepers shall be the responsibility of the ''Design Authority'', but shall in any event conform to the application requirements in [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]]
<li>''Curbs''
<ol>
<li>must be designed for securement directly to the ''deck'' structure, or to intermediate blocking (they must not be situated on top of the ''roof system''), and
<li>shall be designed to achieve a minimum height of 203.2 mm (8”), measured from the surface of the ''drainage plane'' (not including panel seam upstands), or from the highest point of a ''curb cricket''.
</li></ol>
<li>''Curbs'' with a width
<ol>
<li>less than 914.4 mm (36”) may be designed with a ''cricket'' but require, as a minimum, a back-pan flashing,
<li>between 914.4 mm (36”) and 2438.4 mm (96") require an architectural metal ''cricket'' with rigid support, to prevent metal distortion, and
<li>greater than 2438.4 mm (96") must
<ol>
<li>be designed to divert and drain the anticipated volume of water above the ''curb'',
<li>incorporate a ''cricket'', fully supported with insulation or framing and designed to direct water and snow to either side of the ''curb'', and
<li>incorporate a waterproofed gutter membrane installed over the ''cricket'' (Also see [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3., ''Membrane Gutters'']]).
</li></ol>
</li></ol>
<li>A waterproofed gutter membrane around a ''curb''
<ol>
<li>shall have a minimum slope of 2%, along the up-slope face of the ''curb'', to direct water around the ''curb'' and toward the eaves,
<li>should be continuous along the sides of the ''curb'', as dictated by the ''curb'' size and roof slope, or fall, and
<li>must direct water onto the lower metal panels.
</li></ol>
<li>Equipment isolators are not considered part of the ''roof system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''Guarantee'''''.
</li></ol>

====12.1.3.5. Attic Ventilation====

<ol>
<li>{{hilite | See || 2027-February-1 }} [[#1.1.3.4. Ventilation |{{hilite | Article 1.1.3.4. "Ventilation" || 2027-February-1 }}]].
</li></ol>

{{strike| <ol>
<li>{{hilite | The design and selection of the ventilation system is the responsibility of the ''Design Authority'', and may be achieved by incorporating into the roof design both intake and exhaust vents, including (without limitation),|| 2021-June-30 }}
<ol>
<li>{{hilite | eave vents,|| 2021-June-30 }}
<li>{{hilite | gable end vents,|| 2021-June-30 }}
<li>{{hilite | hip vents,|| 2021-June-30 }}
<li>{{hilite | static vents,|| 2021-June-30 }}
<li>{{hilite | ridge vents, and|| 2021-June-30 }}
<li>{{hilite | cupolas.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Attic (roof cavity) ventilation|| 2021-June-30 }}
<ol>
<li>{{hilite | must meet the minimum requirements of the Code having jurisdiction, even in conditions where snow cover is present (See the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp9s919 Article 9.19.1.3., "Clearances"]) (Roofs that do not provide adequate ventilation do not qualify for a '''''RoofStar Guarantee''''')|| 2021-June-30 }}, and
<li>{{hilite | shall be suitable for|| 2021-June-30 }}
<ol>
<li>{{hilite |the slope of the roof|| 2021-June-30 }},
<li>{{hilite |the vented area|| 2021-June-30 }}, and
<li>{{hilite |the design and configuration of the roof structure|| 2021-June-30 }}, and
</li></ol>
<li>{{hilite | shall be provided for roofs over cathedral ceilings.|| 2021-June-30 }}
</li></ol>
<li>{{hilite | Continuous ridge venting systems|| 2021-June-30 }}
<ol>
<li>{{hilite | are acceptable and are recommended for all areas with vaulted ceilings|| 2021-June-30}}.
<li>{{hilite | may be installed on slopes 1:3 (4” in 12”) and greater, but application on slopes less than 1:3 must be permitted by manufacturer’s published installation instructions|| 2021-June-30 }}.
</li></ol>
</li></ol> || 2026-January-27 }}

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed to metal panels and should be designed for attachment to vertical surfaces only.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>{{hilite | See [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]] for sheet membrane requirements.|| 2021-June-30 }}
<li>Regardless of the type or thickness of underlayment used in the field, all membrane flashing for changes in plane shall achieve a minimum finished thickness of 3 mm.
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>{{hilite | manufactured from sheet metal conforming to the material requirements in || 2023-June-16 }} [[#Section 13.2. Materials | Section 13.2.]], {{hilite | when the flashing is custom-made or fabricated by the ''Contractor'', || 2023-June-16 }}
<li>{{hilite | compatible with the ''roof system'', || 2023-June-16 }}
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>{{hilite | of sufficient height to extend vertically (when measured from the up-slope base of the flashing upstand to the opening at the top) at least || 2022-October-22 }}
<ol>
<li>{{hilite | 203.2 mm (8”), for slopes 0 to 1:6 (2” in 12”) || 2022-October-22 }},
<li>{{hilite | 152.4 mm (6”), for slopes greater than 1:6 and equal to 1:3 (4” in 12”) || 2022-October-22 }}, or
<li>{{hilite | 101.6 mm (4”), for slopes greater than 1:3 || 2022-October-22 }}.
</li></ol>
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
<li>{{hilite | plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer. || 2023-June-16}}
</li></ol>
<li>{{hilite | In regions that experience high snow accumulations, penetration flashings taller than the stated minimums in this Article are strongly recommended || 2022-October-22 }}.
<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} {{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }} {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>{{hilite | must slope downward from the penetration approximately 45°,|| 2021-June-30 }}
<li>{{hilite | shall be at least 50.8 mm (2”) wide|| 2021-June-30 }},
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
<ol>
<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
</li></ol>
<li>{{hilite | Chimney chase caps must be || 2021-June-30 }}
<ol>
<li>{{hilite | galvanized metal conforming to the requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]|| 2021-June-30 }},
<li>{{hilite | fabricated with penetration collars at least 152.4 mm (6") in height|| 2021-October-30 }},
<li>{{hilite | soldered at all joints in the ''drainage plane''|| 2021-June-30 }}, and
<li>{{hilite | fabricated with slope to shed water|| 2021-June-30 }}.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing Systems Penetrations====

<ol>
<li>{{hilite | Lead plumbing vent flashings must each be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated with sheet lead material weighing no less than 14.65 Kg/m2 (3lb/sf)|| 2021-June-30 }},
<li>{{hilite | properly sized for the pipe|| 2021-June-30 }}, and
<li>{{hilite | supplied with a settlement cap made from the same materials (the inside collar of the settlement cap must fit vertically inside the pipe opening by at least 25.4 mm (1”))|| 2021-June-30 }}.
</li></ol>
<li>{{hilite |In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be|| 2021-June-30 }}
<ol>
<li>properly sized for the penetration, both in diameter and height,
<li>flexible or sloped to suit the roof slope, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Air Vents====
{{hilite | (See [[#Article 1.1.3.4. Ventilation | Article 1.1.3.4., "Ventilation"]]) || 2027-February-1 }}

<ol>
<li>{{hilite | Vents, regardless of their type, must be either|| 2021-June-30 }}
<ol>
<li>{{hilite | proprietary to, or privately labeled for, the panel manufacturer, or|| 2021-June-30 }}
<li>{{hilite | specifically accepted by the '''''RoofStar Guarantee Program''''' (See [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]])|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Ridge vents must be|| 2021-June-30 }}
<ol>
<li>{{hilite | fabricated from a compatible metal|| 2021-June-30 }},
<li>{{hilite | acceptable to the metal panel manufacturer|| 2021-June-30 }},
<li>{{hilite | suitable for slopes 1:4 and greater|| 2021-June-30 }}, and
<li>{{hilite | constructed with internal baffles to prohibit the intrusion of|| 2021-June-30 }}
<ol>
<li>{{hilite | insects|| 2021-June-30 }},
<li>{{hilite | vermin|| 2021-June-30 }},
<li>{{hilite | snow|| 2021-June-30 }}, and
<li>{{hilite | debris|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>Natural air flow vents must be
<ol>
<li>Type B or C ventilators conforming to CAN3-A93-M82 (R2003), "Natural Airflow Ventilator for Buildings", and permanently marked with the standard number,
<li>tested by an accredited third party to verify compliance with the required Standard,
<li>fabricated from plastic or corrosion-resistant metal (painted or unfinished), and
<li>manufactured with a base flange that measures
<ol>
<li>at least 76.2 mm (3”) wide on the up-slope side of the flashing, or
<li>at least 50.8 mm (2”) along the vertical sides, and along the bottom side of the flashing.
</li></ol>
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', and shall
<ol>
<li>{{hilite |incorporate only the split panel detail for flashing penetrations (use of a flexible boot flashing secured with gasketed screws is not permitted)|| 2022-February-5 }}, and
<li>{{hilite |incorporate no fewer than two storm collars for each penetration flashing that does not include a settlement cap; each collar must be separated from the other by no more than 76.2 mm (3”)|| 2022-February-5 }}.
</li></ol>
</li></ol>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}====

<ol>
<li>All penetration flashing materials must be new.
<li>All penetrations must be flashed to seal the penetration where it passes through the deck and underlayment and must prevent water ingress at least 203.2 mm (8") above the ''finished system surface''.
<li>{{hilite | Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing|| 2021-June-30 }}
<ol>
<li>{{hilite | must be suitable for the slope and penetration|| 2021-June-30 }}, and
<li>{{hilite | must be properly {{hilite | sized and || 2024-January-31 }} fitted {{strike| to form or permit a seal || 2023-January-26 }} around the penetration {{hilite | to permit a seal|| 2024-January-31 }}|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | All penetration flashings suitable for application on an architectural metal panel ''roof system'' || 2026-February-1 }}
<ol>
<li>{{hilite | must be secured to the metal panel system with mechanical fasteners|| 2026-February-1 }},
<li>{{hilite | shall maintain a drainage space around all sides of at least 12.7 mm (1/2”) and shall not impede the flow of water along a panel|| 2026-February-1 }},
<li>{{hilite | shall be oriented to promote positive drainage, and|| 2026-February-1 }}
<li>{{hilite | shall be sealed to the panel or to split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for split pan requirements) with an acceptable sealant applied to both the underside of a flange and around its edges|| 2026-February-1 }}.
</li></ol>
<li>A flexible boot flashing {{hilite | may be|| 2026-February-1 }} used with cylindrical penetration {{strike| is permissible || 2025-February-1 }}, provided
<ol>
<li>the flexible boot flashing
<ol>
<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
<li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
<li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,
<li>is fastened with gasketed screws spaced no more than 38.1 mm (1-1/2") O.C.,
<li>is secured around the penetration with a stainless-steel clamping ring{{hilite |, but when a clamping ring cannot be installed, the top of the flashing must be protected with a caulked, galvanized storm collar|| 2021-October-30 }}, and
<li>is sealed around the penetration joint with a bead of sealant
</li></ol>
<li>{{hilite | the penetration is fitted with a properly sized and caulked galvanized storm collar|| 2021-June-30 }}, and
<li>{{hilite | the plumbing trade (for new construction only) ensures|| 2021-June-30 }}
<ol>
<li>{{hilite | the flashing is not distorted|| 2021-June-30 }}, and
<li>{{hilite | a storm collar is securely fitted and caulked with sealant|| 2021-June-30 }}.
</li></ol>
</li></ol>
<li>{{hilite | Plastic flashings, vents, and related fittings shall not be used on an architectural sheet metal roof|| 2026-February-1 }}.
<li>A cylindrical penetration flashing (i.e., for a pipe)
<ol>
<li>with a maximum opening diameter equal to or less than 152.4 mm (6”) may be installed on a curb, but shall in any case be flashed with a flexible boot flashing, or with a rigid metal pipe flashing.
<li>with a maximum opening diameter greater than 152.4 mm (6”), and all exhaust flues (B-vents), may not be flashed at the ''drainage plane'' and instead must be installed on a curb (see [http://rpm.rcabc.org/index.php?title=ASM_11.2.1_Curb,_Split_Panel ASM 11.2.1 Curb, Split Panel]).
</li></ol>
<li>{{hilite | When a cylindrical penetration extends above the top edge of its flashing so that it cannot be sealed with a settlement cap, the penetration must be fitted with at least one properly fitted, level, galvanized clamping storm collar placed immediately above the top opening of the flashing.|| 2021-June-30 }}
<li>{{hilite | All installed storm collars must be sealed with a continuous, untooled bead of acceptable sealant at least 9.53 mm (3/8”) wide, applied to and centered over the joint between the collar and the penetration|| 2020-July-3 }}.
<li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head), or
<li>a curb waterproofed with sheet membrane and flashed with sheet metal, and fitted with a customized sheet metal hood (shaped to function like a weather head).
</li></ol>
<li>Cables passing through a penetration flashing should be drooped, and horizontal pipes should be fitted with a capillary-breaking collar, to prevent water from tracking along the cable or pipe, into the building; {{hilite | water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''. || 2023-June-16 }}
<li>{{hilite | Where a purpose-made flashing does not fit the penetration (i.e., a penetration that is a square post), or when a penetration extends above the top edge of the flashing so that it cannot be enclosed with a cap or protected with a storm collar {{hilite | {{strike| (Ref. Figure 12.3.2.-A)|| 2025-February-1 }}{{hilite | (See '''Figure 12.3.2.1.-A''')|| 2026-February-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}|| 2020-July-3 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of {{hilite |semi-cured EPDM (or its equivalent)|| 2020-July-3 }},
<ol>
<li>{{hilite | loosely wrapped around the penetration and the flashing at least 1-1/2 times, or adhered to itself and overlapped at least 50.8 mm (2") ||2021-February-7 }},
<li>{{hilite | installed free of wrinkles or fish-mouths ||2021-February-7 }},
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>{{hilite | clamped at the top and at the bottom using stainless steel clamps set back from the membrane edge no more than 6.35 mm (1/4") ||2021-February-7 }}, or
</ol></li>
<li>with {{hilite | heat- ||2021-February-7 }}shrink tubing that
<ol>
<li>{{hilite | {{hilite | extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2") ||2021-February-7 }},
<li>is secured with stainless steel mechanical clamps installed at each end of the tubing, and
<li>{{hilite | is caulked with an acceptable sealant (when adhesive-lined heat-shrink tubing is used, the sealant may be omitted). || 2023-October-28 }}
</ol></li>
</ol></li>
<li>{{hilite | Unshielded flexible mechanical ("MJ") couplings || 2024-January-31 }}
<ol>
<li>{{hilite | shall be clamped to the penetration and its flashing, and sealed along the top edge with an acceptable sealant, and || 2024-January-31 }}
<li>{{hilite | are suitable for use only with penetrations that will not expand, contract, or move with anticipated building settlement, i.e., fall protection anchors. || 2024-January-31 }}
</ol></li>
<li>{{hilite | Chimney chase caps that are included in the scope of roofing work|| 2021-October-30 }}
<ol>
<li>{{hilite | shall be fabricated to meet the requirements set out in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]|| 2021-October-30 }},
<li>{{hilite | must be fully supported beneath the flashing|| 2021-October-30 }},
<li>{{hilite | must be waterproofed beneath the cap flashing with a RoofStar-accepted self-adhered eave protection membrane installed according to the membrane manufacturer’s written instructions (Ref. [[#8.2.1.2. Eave and Valley Protection | Article 8.2.1.2.]])|| 2021-October-30 }}, and
<li>{{hilite | shall be sealed at the penetration collars with the waterproofing membrane|| 2021-October-30 }}.
</li></ol>
<li>{{hilite | Cylindrical penetrations through chimney chase caps that form part of the roofing work must be fitted with a properly sized galvanized storm collar, caulked with sealant|| 2021-October-30 }}.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.1.-A Alternate Flashing of Pipe Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.1.(14) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.1.3.1-A (B).png | link=https://rpm.rcabc.org/images/4/49/Figure_12.1.3.1-A_%28B%29.png | 400 px]]
|}

====12.3.2.2. Reserved====
====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16}}
<li>{{hilite | Penetrations that are closer together than the allowable minimum distance must be supported by a written Variance issued by the '''''Guarantor'''''. || 2023-June-16 }}
</li></ol>

====12.3.2.4. Curbs and Sleepers====

<ol>
<li>All ''curb'' flashing shall be constructed on a split pan and affixed to the pan with blind rivets.
<li>Split pans must be
<ol>
<li>secured to the roof structure, and to adjacent panels, with cleats that are fashioned from compatible metal and fastened to the structure with screws.
<li>hooked to the cleats, and to adjacent roof panels, shingle fashion with positive laps, and
<li>sealed at each lap with two parallel untooled beads of sealant.
</li></ol>
<li>{{hilite | All curbs or penetrations that can be flashed with sheet membrane shall, regardless of their geometry, be flashed with a high-temperature rated membrane which must positively lap field underlayment, and must be carried|| 2026-February-1 }}
<ol>
<li>{{hilite | at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies)|| 2026-February-1 }},
<li>{{hilite | no higher than the top of a flexible boot penetration|| 2026-February-1 }},
<li>{{hilite | to the top inside edge of curbs, and|| 2026-February-1 }}
<li>{{hilite | onto field by at least 152.4 mm (6”)|| 2026-February-1 }}.
</li></ol>
{{strike| <li>All ''curbs'' must be fully flashed with the same membrane used for eave protection and valleys, and must extend to the top of the ''curb''. || 2025-February-1 }}
<li>Where possible, membrane flashing should extend across the top of the ''curb'' and terminate on the vertical inside face.
<li>{{hilite | Skylights installed on ''curbs'' meeting the minimum height requirements (see [[#12.1.3.4. Curbs and Sleepers | Article 12.1.3.4.]]) must be waterproofed with membrane and flashed with sheet metal in keeping with the requirements for ''curbs''|| 2021-June-30 }}.
<li>{{hilite | Skylights with proprietary ''curbs'', regardless of their height, must be sealed to the ''roof deck'' following the requirements for penetration and vent flashings|| 2021-June-30 }}.
<li>Back pan membrane flashing must extend
<ol>
<li>at least 101.6 mm (4”) up the face of the penetration (on insulated assemblies),
<li>to the top inside edge of ''curbs'',
<li>914.4 mm (36") up the slope from the ''curb'' transition, and
<li>onto the field, past the ''curb'' at least 152.4 mm (6”).
</li></ol>
<li>Back-pan metal flashings for curbs up to 914.4 mm (36”) in width must extend
<ol>
<li>past the edges of a ''curb'' by 101.6 mm (4”) but project no closer to the adjacent seam than 51 mm (2”), and
<li>up the slope beneath the metal panels, to a point at least 150 mm (6”) (when measured vertically) from the base of the ''curb''.
</li></ol>
<li>''Curbs'' with widths 914.4 mm (36”) to 2438.4 mm (96") must be constructed with a metal ''cricket''
<ol>
<li>that is supported by rigid material to prevent metal distortion,
<li>that is integrated with the ''curb'' flashing panels,
<li>that extends up-slope from the back of the ''curb'', beneath the metal panels to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>fabricated with flanges that lap under the metal ''curb'' flashing at least 50.8 mm (2”), and
<li>that is closed at all seams, using
<ol>
<li>welds, or
<li>blind rivets, incorporating two beads/rows of sealant.
</li></ol>
</li></ol>
<li>Waterproofed gutter membranes for ''curbs'' wider than 2438.4 mm (96") must slope toward the eaves at least 2%, and shall
<ol>
<li>extend up the slope at the back of the ''curb'', beneath the metal panels, to a point at least 152.4 mm (6”) (when measured vertically) from the base of the ''curb'',
<li>extend horizontally from the ''curb'' at least 254 mm (10”), to the nearest metal panel upstand,
<li>lap continuously on either side of the ''curb'', and onto the down-slope metal panels, and
<li>extend a minimum of 152.4 mm (6") over the lower metal roof panels, measured from the back pan.
</li></ol>
<li>Fasteners for metal panels installed above the back of the ''curb'' must be placed 101.6 mm (4") or more above the curb base, when measured vertically.
</li></ol>

====12.3.2.5. Air Vents====

<ol>
<li>Air vents
<ol>
<li>{{hilite | shall be installed on a curb, using the split pan method (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements) || 2027-February-1 }},
<li>{{hilite | shall be installed within 609.6 mm (24”) of a ridge, and evenly spaced along the ridgeline, and || 2027-February-1 }}
<li>{{hilite | must be installed on only one side of a ridge or hip line (vents installed on opposite or adjacent sides of a roof plane will interfere with proper attic ventilation) || 2027-February-1 }}.
</li></ol>
</li></ol>

{{strike| <ol>
<li>{{hilite |Air vents shall be installed in keeping with the requirements in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]]|| 2021-June-30 }}
</li></ol> || 2026-January-27 }}

====12.3.2.6. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]], and
<ol>
<li>may be used
<ol>
<li>{{hilite | on the ''drainage plane''|| 2021-February-7 }},
<li>where sheet membrane flashing may not be practical or even possible,
<li>{{hilite | to terminate the top edge|| 2021-February-7 }} of sheet membrane flashing,
<li>{{hilite | for sheet membrane reinforcement (i.e., at corners)|| 2021-February-7 }},
<li>{{hilite | where abrasion resistance is desirable|| 2021-February-7 }},
<li>{{hilite | where resistance to contamination of sheet membrane is necessary|| 2021-February-7 }}, or
<li>{{hilite | where the ''Design Authority'' specifies its application. || 2023-June-16 }}
</ol></li>
<li>must be compatible with the primary sheet membrane flashing,
<li>shall be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, all as required by the ''manufacturer'' in their published instructions,
<li>must be applied within masked boundaries to produce clean, straight, plumb edges, and
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece {{hilite | is cut to|| 2021-February-7 }} cover the masked area, to within 3.78 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") (See {{hilite | '''Figure 12.3.2.6.-A''' || 2026-February-1 }}).
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane.
<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing ''system''|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>{{hilite | may be used|| 2021-February-7 }}
<ol>
<li>{{hilite | to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]]|| 2021-February-7 }},
<li>{{hilite | to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes|| 2021-February-7 }}, or
<li>{{hilite | to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]])|| 2021-February-7 }}.
</ol></li>
<li>{{hilite | must not be used in the ''drainage plane'', or to reinforce membranes against abrasion|| 2021-February-7 }},
<li>{{hilite | must be applied in two cured coats, unless otherwise permitted in this Standard|| 2021-February-7 }}, and
<li>{{hilite | must be fleece-reinforced between coats where|| 2021-February-7 }}
<ol>
<li>{{hilite | the application is considered permanent, || 2023-June-16 }}
<li>{{hilite | a change in plane (angle) occurs|| 2021-February-7 }}, or
<li>{{hilite | there is a joint between two supports and the liquid membrane must serve as a bridge|| 2021-February-7 }}.
</ol></li>
</ol></li>
<li>{{hilite | Accessory PMMA detailing products|| 2021-February-7 }}
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>{{hilite | must be|| 2021-October-30 }} reinforced with chopped or loose fibres,
<li>{{hilite | shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted|| 2021-February-7 }},
<li>{{hilite | must be used at locations 101.6 mm (4”) or more above the ''drainage plane''|| 2021-February-7 }}, {{hilite | except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system|| 2021-October-30 }}, and
<li>{{hilite | must not be used where movement is expected|| 2021-February-7 }}.
</ol></li>
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Acceptable Application of 2-Component PMMA Around Roof Penetration''' || 2026-February-1 }} {{hilite | Forming Part of Sentence 12.3.2.6.(2) || 2026-February-1 }} (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg | link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of walls must be located at least 88.9 mm (3-1/2") above the ''drainage plane''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''roof assembly'' (i.e., on top of a parapet) shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
</li></ol>

====12.3.2.8. Reserved====

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. {{strike| Definitions || 2025-February-1 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>{{hilite | ''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counter-flashing (also see the Glossary for a colloquial use of the term). || 2023-June-16 }}
<li>{{hilite | ''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge"). || 2023-June-16 }}
<li>{{hilite | ''Linear metal flashing''|| 2021-June-30 }} {{hilite | means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''roof system''|| 2021-June-30 }}.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the ''Architectural Sheet Metal Manual'' published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>{{hilite | Design drawings must detail metal flashing profiles desired for the ''project''|| 2021-June-30 }}.
<li>{{hilite | Roof materials that are UV-sensitive must be protected with metal flashings|| 2021-June-30 }}.
<li>{{hilite | Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the design specifications for ''linear metal flashing'' shall conform to the design requirements in the applicable ''waterproofing roof system'' Standard|| 2021-June-30 }}.
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 24-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
<li>{{hilite | Except for metal valley flashings (See [[#10.3.4.2. Eaves and Rake Edges | Article 10.3.4.2.]]), ''linear metal flashings'' may be overlapped rather than seamed; each overlap must be no less than|| 2021-June-30 }}
<ol>
<li>{{hilite | 101.6 mm (4”) when fully caulked in the lap|| 2021-June-30 }}, or
<li>{{hilite | 152.4 mm (6”) when installed without caulking in the lap|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Sealants used in exposed locations must be tooled to positively shed water|| 2021-June-30 }}.
</li></ol>
 
:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-A Minimum Required Gauge and Length for Pre-finished Galvanized Steel Cap (Coping) Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Horizontal Span !! style="width:50px;" | Minimum Slope !! style="width:50px;" | Gauge !! style="width:150px;" | Maximum Flashing Segment Length !! style="width:200px;" | Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 300 - 900 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 900 mm or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|}
::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

:{|
|-
| colspan="1"; style="text-align:center;width:750px;" | {{hilite | '''Table 13.1.3.4.-B Minimum Required Gauge and Length for Pre-finished Galvanized Steel Vertical Flashing''' || 2026-February-1 }} {{hilite | Forming Part of Article 13.1.3.4. || 2026-February-1 }}
|-
|}
:{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! style="width:200px;" | Vertical Face !! style="width:50px;" | Gauge !! style="width:175px;" | Segment Length !! style="width:250px;" | Vertical Seam Options
|-
| Up to 152.4 mm (6") || 24 || 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || 3048 mm (120") || Butt Seams*
|}

::''*'' Refer to [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]]).
<li>{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}{{hilite | (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
</li></ol>

====13.1.3.6. Cap and Counter-flashing====

<ol>
<li>{{hilite | Cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the design requirements in the applicable ''waterproofing roof system'' or gutter membrane Standard || 2023-June-16 }}.
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Refer to [[#10.3.7.2. Intersections with Waterproofing Roof | Article 10.3.7.2.]]
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>{{hilite | ''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.|| 2022-February-5 }}
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>{{hilite | When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below|| 2026-July-1 }}.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.6858 mm (0.027", 24-gauge) galvanized steel sheet, conforming to ''ASTM A653'' / ''A653M-06'' CS Type B, Z275 (G90) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel {{hilite | Grade 304|| 2026-July-1 }}''': {{hilite | minimum 0.38 mm (0.014", 28-gauge)|| 2026-July-1 }} stainless steel, Grade {{strike| Type 302, || 2025-June-3 }} 304, {{strike| 316, 2B finish to ASTM A167-82 || 2025-June-3 }} {{hilite | conforming to ASTM {{strike| A167-82 || 2025-June-3 }} A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”|| 2026-July-1 }}. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet {{hilite | (See || 2026-July-1 }} [[Notes to ASM Standard#A-13.2.1.2.(3)(2) | {{hilite | Note A-13.2.1.2.(3)(2)]]) || 2026-July-1 }}.
<li>{{hilite | '''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge)) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. || 2026-July-1 }}
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.6858 mm (0.027", 24-gauge) aluminum-zinc alloy coated steel sheet, conforming to ''ASTM A792''/''A792M-06'' CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ''ASTM A924''/''A924M-06'' ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Stainless Steel''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Type 302, 304, 316, 2B finish to ''ASTM A167-82''. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ''ASTM B370-81''. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard ''EN 988-1996''. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards.
<li>{{hilite | Where a ''waterproofing system'' adjoins and Architectural Sheet Metal System, ''linear metal flashings'' must be fabricated from 24-gauge steel stock|| 2021-June-30 }}.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>{{hilite | threaded screws, {{hilite | friction-type pins (i.e., for masonry or concrete), plug (inserts), || 2024-January-31 }}or rivets (where permitted), || 2023-October-28 }}
<li>{{hilite | compatible with materials they contact, || 2023-October-28 }}
<li>{{hilite | corrosion-resistant, || 2023-October-28}}
<li>{{hilite | identified in the engineered design, when part of the roof system’s wind resistance calculations (Ref. Article 3.1.3.3., “Resistance to Specified Wind Loads”), || 2023-October-28 }}
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>{{hilite | Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings || 2023-October-28 }}
<ol>
<li>{{hilite | in concealed locations must be at least No. 8 (larger if required by the engineered design), with a low-profile head. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10. (larger if required by the engineered design), shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.|| 2023-October-28 }}
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to any one of the following:
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”.
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”.
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”.
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted otherwise, all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
<li>Where an adjoining ''waterproofing roof system'' is specified as part of the ''Contractor's'' scope of work, the fabrication of ''linear metal flashing'' shall conform to the requirements in the applicable ''waterproofing roof system'' Standard.
<li>Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break.
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed,
<li>shall conform to the minimum requirements in {{hilite | '''Table 13.1.3.4.-A''' || 2026-February-1 }},
<li>shall incorporate seams conforming to the requirements in {{hilite | '''Table 13.1.3.4.-B''' || 2026-February-1 }}, and
<li>may not exceed the maximum length of 3048 mm (120").
</ol></li>
<li>{{hilite |The vertical leg of any metal flashing that overlaps roofing material must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break|| 2021-June-30 }}.
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems''),
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.1.3. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. RoofStar 15-Year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous {{hilite | or butyl-based || 2026-February-1 }} membrane used as eave protection in a ''water-shedding roof system'') (Ref. [[#Section 8.2. Materials | Section 8.2.]]).
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}
<ol>
<li>{{hilite | shall conform to the fasteners requirements in || 2024-January-31 }} [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>{{hilite | shall be firmly fastened, without distorting secured materials, || 2024-January-31 }}
<li>{{hilite | must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate || 2024-January-31 }} {{strike| must penetrate the substrate as specified in [[#3.3.2.1. Securing Systems with Mechanical Fasteners | Article 3.3.2.1.]], and || 2023-January-26 }}
<ol>
<li>{{hilite | through the back surface of steel framing at least 19.05 mm (3/4"), || 2024-January-31 }}
<li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
<li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
{{strike| <li>Where hidden metal clips are required, they must
<ol>
<li>be at least 24-gauge,
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 76.2 mm (3") from the bottom edge (hook), and
<li>engage drip or safety edges by a minimum of 12.7 mm (1/2").
</li></ol>
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centred between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol> || 2023-January-26 }}
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the roof side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>{{hilite | RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing|| 2022-February-5 }}.
<li>{{hilite | All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article|| 2022-February-5 }}.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ({{hilite | '''Figure 13.3.2.2.-A''' || 2026-February-1 }}) or S-lock ({{hilite | '''Figure 13.3.2.S.-B''' || 2026-February-1 }} (Single) and {{hilite | '''Figure 13.3.2.S.-C''' || 2026-February-1 }} (Double)), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }},
<li>{{hilite | continuous eave flashing to which the metal panels are secured || 2023-June-16 }}, or
<li>{{hilite | the vertical face of any flashing that is concealed by a ''wall assembly'', counter-flashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap|| 2021-October-30 }}
<ol>
<li>{{hilite | is no less than 101.6 mm (4”) when fully caulked in the lap|| 2021-October-30 }}, or
<li>{{hilite | is no less than 152.4 mm (6”) when installed without caulking in the lap.|| 2021-October-30 }}
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (closed with a "rat tail").
<li>When the face of vertically-oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically-oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See {{hilite | '''Figure 13.2.2.2.-A''' || 2026-February-1 }}) must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>
<li>'''S-locked seams''' ({{hilite | '''Figures 13.2.2.2.-B''' || 2026-February-1 }} and {{hilite | '''13.2.2.2.-C''' || 2026-February-1 }}) must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
<li>'''Flat butt seams'''
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
<li>The saddle for flat butt seams must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-A''' '''Mechanical Locking Standing Seam''' Forming Part of Sentence 13.2.2.2.(11) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-B''' '''Single S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand) || colspan="1"; style="text-align:center;width:350px;" | {{hilite | '''Figure 13.3.2.2.-C''' '''Double S-Lock''' Forming Part of Sentence 13.2.2.2.(12) || 2026-February-1 }} (Click to expand)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]] || [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 300 px]] || [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]]
|}

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | The installation of cap flashing and counter-flashing specified for an adjoining ''waterproofing roof system'' or membrane gutter shall conform to the application requirements in the applicable ''waterproofing roof system'' Standard || 2023-June-16 }}.
</li></ol>

<hr>
<div id=PART_14></div>

={{hilite | Part 14 - The Roof as a Platform || 2023-June-16}}=
==Section 14.1. Design==
===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. {{strike| Definitions || 2024-December-23 }}{{hilite | Defined Terms || 2026-February-1 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. RoofStar 15-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any covering, amenity space, structure or live loads superimposed upon the ''roof system''.
</li></ol>

====14.1.3.3. Securement of Supported Structures and Equipment====

<ol>
<li>The ''Design Authority'' is responsible to specify the appropriate securement design of roof coverings, structures, and equipment, to resist ''Specified Wind Loads''.
<li>Where structural securement is desirable or required, the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12,"Penetrations and Curbs"]], and [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]).
</li></ol>

====14.1.3.4. Snow Guards====

<ol>
<li>While snow guards are not part of the ''roof system'', snow guards
<ol>
<li>must not penetrate the metal ''roof system'', and
<li>shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>The decision to use snow guards, and their selection, is the responsibility of the ''Design Authority'' and neither the '''''Guarantor''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the roof ''system'' caused by the use or absence of snow guards.
</li></ol>

====14.1.3.5. Photovoltaic Panels====

<ol>
<li>Photovoltaic panels are considered "equipment" within the definitions used in this Standard, are not part of the ''roof system'', and therefore photovoltaic panels
<ol>
<li>must not penetrate the metal ''roof system'', and
shall be designed in consultation with a ''registered professional'' skilled in the work concerned ("British Columbia Building Code", Division C, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dcp2s22r2 Section 2.2., "Administration"]).
</li></ol>
<li>All electrical connections, distribution cables, and related systems that penetrate the ''roof system'' must be flashed with purpose-made flashings incorporating weather-head fittings (see [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]]; see also [[#2.1.8. Electrical Cables and Boxes | Subsection 2.1.8., ''Electrical Cables and Boxes'']]).
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to ASM Standard | Notes to Standard]]=

</div>
</div>
<div class="col-md-12">

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