View source for (Draft) Hot Rubber Roof Systems Standard



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<big><big>Division B - Standards</big></big><br>
<big>Waterproofing Roof Systems: Liquid Membranes</big><br>
<hr>
<big><big><big><big><big><big>RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs</big></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 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 - Insulation Overlays]]
|-
| [[#PART_9  | Part 9 - Roof Field (Membrane 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 Hot Rubber Standard | Notes to Standard]]
|-
|}

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'''First Edition''': June 16, 2022
<br>'''Previous Edition''': October 20, 2023
<br>'''Current Edition''': Adopted October 25, 2024
<br><br>
All changes to this Standard are effective<br><big>'''November 1, 2024'''</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>In addition to the Scope described in Division A, this Standard applies to the design and construction of ''roof systems'' that are site-built, or which may be factory fabricated, in part or in their entirety.
</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.
</li></ol>
</li></ol>

====1.1.1.4. {{strike| Definitions || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>''Finished roof system surface'' means the top surface of any ''roof system'', inclusive of ballast or ''overburden''.
<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>''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 ''roof system''.
<li>''Guarantor'' (used interchangeably with '''''RGC''''') means the RCABC Guarantee Corporation, which offers the '''''RoofStar Guarantee'''''.
<li>''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''.
<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 | ''Vegetated Roof Assembly'' (''VRA''), used interchangeably in the "RGC Standard for Vegetated Roofs" with ''green roof'' or ''green roofing'', means a functional arrangement of interacting components, inclusive of ''vegetation'', that is designed in conjunction with a supporting ''roof assembly'', is intended to both grow and flourish, and is often installed on a roof to control the rate of rainwater discharged through a storm drainage system || 2025-October-25 }}.
<li>''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”).
<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 || 2025-October-25 }}====

===={{hilite | 1.1.1.6. Objectives || 2025-October-25 }}====

<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 || 2025-October-25 }}====

<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 || 2025-October-25 }}====
<ol>
<li>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></ol>

===={{hilite | 1.1.1.9. Suitability of Design || 2025-October-25 }}====
<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>When the roof is intended as a platform to support a ''vegetated roof system'', the supporting ''roof assembly'' must be suitable for that purpose (See [[#1.1.3.1. Permitted Roof Systems | Sentence 1.1.3.1.(2)]]).
</li></ol>

===1.1.2. Guarantee Term 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>

===={{hilite | 1.1.2.2. Reserved || 2025-October-25 }}====

===={{hilite | 1.1.2.3. Quality Control || 2025-October-25 }}====

<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, ELD arrangements, 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 || 2025-October-25 }}====
(See [[Notes to Hot Rubber Standard#A-1.1.2.4. | {{hilite | Note A-1.1.2.4. || 2025-October-25 }}]])

<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 the 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 Hot Rubber Standard#A-1.1.3.1. | Note A-1.1.3.1.]])

<ol>
<li>This Standard applies to new construction, and to the partial or complete replacement of existing roofs, constructed as
<ol>
<li>''Uninsulated systems'' in which the membrane is bonded directly to the ''roof deck'' or an overlay, and is exposed to the weather and to sunlight, and
<li>''Protected roof systems'', also referred to as “inverted”, in which the membrane is installed beneath other ''roof system'' or protection materials (usually insulation), and is protected from exposure to the weather and from sunlight.
</li></ol>
<li>{{hilite | Where the roof is intended to support a ''vegetated roof system'' and qualify for a '''''RoofStar Vegetated Roof Guarantee''''', only a new roof or a roof that is specified for a complete ''roof system'' replacement will qualify for the Guarantee (See || 2025-October-25 }} [[#1.1.4.2. Complete Roof System | Article 1.1.4.2.]] {{hilite | and || 2025-October-25 }} [[#1.3.3.2. Complete Roof System Replacement | Article 1.3.3.2.]] {{hilite | for complete roof system replacement requirements.  See also [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.1._Permitted_Supporting_Roof_Assemblies Article 1.1.3.1.] in the “RGC Standard for Vegetated Roofs” || 2025-October-25 }}).
</li></ol>

====1.1.3.2. Accessibility for Maintenance====

<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.</span>
<li><span class="principles">Any hatch, ladder or mechanical unit should be located a sufficient distance away from the roof edge (setback zone) so that other fall protection measures are not required by those using or accessing this equipment</span>.
<li><span class="principles">When it is not possible to situate a hatch, ladder, or mechanical unit outside the setback zone, guard rails should be designed for the roof edge to provide additional fall protection for those using or accessing such equipment</span>.
<li><span class="principles">Each roof should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, where the roof is at least 3 m (10’) above the surface of the ground, or where a hazard to a person exists, 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'', and should include</span>
<ol>
<li><span class="principles">tall parapets</span>,
<li><span class="principles">guardrails</span>, or
<li><span class="principles">tie-off anchors</span>.
</li></ol>
<li>{{hilite | Where a roof is intended to support a ''vegetated roof system'', the roof must satisfy the design and pre-construction requirements published in the|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard {{hilite |“RGC Standard for Vegetated Roofs”|| 2025-October-25 }}].
</li></ol>

====1.1.3.3. Membrane Integrity Testing====
(See [[Notes to Hot Rubber Standard#A-1.1.3.3. | Note A-1.1.3.3.]] {{hilite | and Figure 1.1.3.3.-A || 2025-October-25 }})

<ol>
<li>Electrical current membrane integrity testing shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or 
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>An electrical current membrane integrity test <u>is required</u> when anyone other than the ''Contractor'' installs ''overburden'', amenities, or equipment, (In this Standard, the term "electrical current membrane integrity test" means a test method that uses electrical current and electronic sensing technology to detect breaches in the membrane ''system'').
<li>An electrical current membrane integrity test <u>is required</u> when the ''Contractor'' installs ''overburden'', amenities, or equipment, <u>but only when</u>
<ol>
<li>the total ''project'' area (footprint), inclusive of planters or other waterproofed features, exceeds 18.58 m2 (200 sf), and
<li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth{{strike| (see Figure 1.1.3-A) || 2024-October-24 }}.
</li></ol>
<li>{{hilite | When the ''roof assembly'' supports a ''vegetated roof system'' covered by a '''''RoofStar Guarantee''''' an electrical current membrane integrity test is optional (not required)  || 2025-October-25 }}<span class="recommended">{{hilite | but recommended || 2025-October-25 }}</span>.{{hilite | An electrical current membrane integrity test is required immediately prior to the installation of a ''vegetated roof system'' || 2025-October-25 }}.
<li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider listed in [[Division_C | Division C]].
<li>Flood testing employed as a secondary or alternative membrane integrity test <span class="recommended">is strongly discouraged for ''conventionally insulated roof systems'' because of the risk of extensive damage to ''system'' components or the building interior</span>, and is best suited for ''protected roof systems'' (See [[Notes to Hot Rubber Standard#A-1.1.3.3.(5) | Note A-1.1.3.3.(5)]]).
<li>If flood testing is specified, it shall be conducted prior to the installation of insulation and roof coverings, and must be executed in keeping with ASTM D5957, "Standard Guide for Flood Testing Horizontal Waterproofing Installations".
</li></ol>
</li></ol>
<br>
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 1.1.3.3.-A Electronic Integrity Testing''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 1.1.3.3. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
|  [[File:Figure 1.1.3.3.-A.jpg |link=https://rpm.rcabc.org/images/2/2a/Figure_1.1.3.3.-A.jpg | 550 px]]
|}

====1.1.3.4. Electronic Leak Detection====
(See [[Notes to Hot Rubber Standard#A-1.1.3.4.| Note A-1.1.3.4.]])

<ol>
<li>Electronic Leak Detection (ELD), when specified by the ''Design Authority'', shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or 
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>Electronic Leak Detection (ELD) is optional for ''waterproofing roof systems'', <span class="recommended">but strongly recommended</span>
<ol>
<li><span class="recommended">for ''projects'' where multiple trades will have access to a roof that is under construction and completed, to identify breaches in the waterproofing membrane in a timely way and avoid future costly delays</span>,
<li><span class="recommended">when the ''roof assembly'' protects a sensitive occupied space (i.e., data centres, hospitals, critical infrastructure)</span>, or
<li><span class="recommended">when the roof supports any type of ''overburden'', amenities, or equipment, {{hilite | including a ''vegetated roof system'' || 2025-October-25 }}</span>.
</li></ol>
<li>When Electronic Leak Detection is specified, it shall provide detection capabilities for all waterproofed surfaces, and should extend at least 50.8 mm (2") vertically from the ''drainage plane'' at
<ol>
<li>all transitions,
<li>any point along the entire deck perimeter, and
<li>protrusions.
</li></ol>
</li></ol>

====1.1.3.5. Hot Works====

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

<ol>
<li><span class="recommended">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</span> (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]).
<li>When the ''project'' involves Hot Work, the ''Design Authority'' must either
<ol>
<li>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, or
<li>provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project''.
</li></ol>
</li></ol>

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

<ol>
<li>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
<ol>
<li>identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned),
<li>identify the ''Contractor'' (if awarded),
<li>articulate the nature of the design problem,
<li>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")),
<li>cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.), 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>Variances are issued by the RGC only to the ''Design Authority'' and will be distributed to the ''Contractor''.
<li>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'''''.
<li>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.
<li>{{hilite | A Variance for a ''vegetated roof assembly'' shall conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.6._Variances Article 1.1.3.6.] of the “RGC Standard for Vegetated Roofs” || 2025-October-25 }}.
</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 Hot Rubber Standard#A-1.1.4.| Note A-1.1.4.]])

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

<ol>
<li>Unless expressly permitted otherwise in this Standard, the design for replacement roofing shall conform to the requirements for new roofing in this Standard.
</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 and waterproofed in keeping with the requirements in both [[#10.1.6.2. Control Joints (Roof Dividers) | Article 10.1.6.2., "Control Joints (Roof Dividers)"]], and [[#Part 10 - Perimeters and Walls | Part 10, "Perimeters and Walls"]]. 
<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., "Variances"]]); any alternative design
<ol>
<li>must include design specifications and construction details showing a positive water cut-off that fully isolates the existing ''roof system'' from the new ''roof system'', and
<li>shall show how the new ''roof system'' will be easily distinguishable from the existing ''roof system''.
</li></ol>
<li>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'').
<li>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'''''.
</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: Contractor Requirements====

<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 Hot Rubber Standard#A-1.3.2.2. | Note A-1.3.2.2.]])
<ol>
<li>The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of the ''project''.
<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.]]).
</li></ol>

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

<ol>
<li>Supervision and installation of a RoofStar-guaranteed ''waterproofing roof system'' may be conducted only by established employees of the ''Contractor'', and every ''project'' must be supervised by a Journeyperson employee who holds a valid ticket.
<li>A Journeyperson may supervise a maximum of three (3) apprentices and/or three (3) labourers (ref. RCABC Policy A-248).
</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>Unless expressly permitted otherwise in this Standard, all replacement roofing shall conform to the requirements for new roofing 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, 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 curb joint securely attached to the structure and waterproofed in keeping with the requirements for ''control joints'' ([[#10.1.6.2. Control Joints (Roof Dividers) | Article 10.1.6.2.]] and [[#10.3.6.2. Control Joints | Article 10.3.6.2.]]). 
<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>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)
<ol>
<li>the securement of new materials ([[#Part 3 - Securing the Roof Assembly | Part 3]]),
<li>deck or wall overlays ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>''continuity'' of air and vapour controls ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>thermal resistance ([[#Part 7 - Insulation | Part 7]],
<li>membranes ([[#Part 9 - Roof Field (Membrane Systems) | Part 9]]), 
<li>membrane flashing ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>drains ([[#Part 11 - Drainage | Part 11]]),
<li>penetrations and curbs ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>linear metal flashings ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>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.
</li></ol>

===1.3.4. Reserved===

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

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to Hot Rubber Standard#A-2 | Note A-2]])

=={{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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====
({{hilite | See Figure 2.1.3.1.-A || 2025-October-25 }})

<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>''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.
<li>''Extreme Slope'' means a roof with a slope <u>greater than</u> 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 <u>greater than</u> 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>''Supporting deck'' ("deck") means the "structural surface to which a ''roof system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'').
<li>''Wall'' 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".
<li>''Wall overlay'' means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of roofing or wall cladding materials.
</li></ol>
</li></ol>
<br>
::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | {{hilite | '''Figure 2.1.1.2.-A Roof Slope''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 2.1.1.2. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
|}
:::{| class="wikitable"
|-
| [[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''''', {{hilite | and shall (for replacement roofs) || 2020-October-22 }} 
<ol>
<li>be designed with a minimum slope of 2% (1/4” in 12”), measured on the primary sloped planes of the roof, and
<li>incorporate crickets at ''curbs'' and sleepers that impede drainage or are wider or longer than 1219.2 mm (48”).
</li></ol>
</li></ol>
</li></ol>

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====
(See [[Notes to Hot Rubber Standard#A-2.1.3.1. | Note A-2.1.3.1.]])

<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. Definitions | Article 2.1.1.2.]] apply (See Figure 2.1.3-A for an illustrated guide to the above definitions). || 2024-October-24 }}
<li><span class="principles">While good drainage is desirable but not always perfectly achievable, and roof ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the roof surface</span>.
<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the roof surface after a reasonable interval following a rainfall (See [[Notes to Hot Rubber Standard#A-2.1.3.1.(4) | Note A-2.1.3.1.(4)]]).
<li><span class="principles">Roof slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions</span> (see [[#2.1.3.2. Roof Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Roof Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
<li><span class="principles">Drainage (slope toward plumbing drains) should be achieved (in descending order of best practices) with</span>
<ol>
<li><span class="principles">four-way slope to drain</span>,
<li><span class="principles">two-way slope to drain, in combination with crickets between drains</span>,
<li><span class="principles">slope to a common valley, or to gutters</span>, or
<li><span class="recommended">positive sloping valleys to drains (highly recommended)</span>.
</li></ol>
</li></ol>

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

<ol>
<li>All new construction roofs must be designed and built with a slope of no less than 2% (1/4” in 12”), measured on the primary sloped planes of the roof.
</li></ol>

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

<ol>
<li>Replacement roof systems may qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' without correcting poor drainage, though <span class="recommended">the elimination of ponding (standing water) is strongly recommended</span>.
</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><span class="principles">''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of roofing work</span>.
</li></ol>

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

<ol>
<li><span class="principles">''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''</span>.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Roof Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to Hot Rubber Standard#A-2.1.5.1.| Note A-2.1.5.1.]]) (See also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Steel ''decks'' must be acceptable to the ''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 Hot Rubber Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Cast-in-place and precast concrete decks must cure for at least 28 days before receiving an adhered roof membrane ("adhered", as it is used in this requirement, means fully or intermittently bonding any membrane to the ''deck'' with an adhesive, hot asphalt (bitumen), or heat), but this limitation may be reduced if
<ol>
<li>both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and 
<li>their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record.
</li></ol>
{{strike| <li>{{hilite | Membranes may not be adhered to lightweight insulation concrete unless expressly permitted by the ''manufacturer''. || 2023-June-16 }} || 2024-October-24 }}
<li>Shotcrete-formed concrete decks are not an acceptable substrate for the application of sheet membranes.
</li></ol>

====2.1.5.3. All Wood Roof Decks====
(See [[Notes to Hot Rubber 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>shall be secured to other supporting structural elements of the building in keeping with the published requirements of the Code having jurisdiction; 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>{{hilite | All mass timber {{strike| or wood board|| 2022-October-28 }} ''decks'' to which a membrane will be directly applied || 2023-October-28 }} must be covered with a properly secured, suitable overlay to
<ol>
<li>ensure the integrity of the membrane as mass timber elements contract and expand, and
<li>protect membranes from wood sap or ''deck'' surface irregularities and protruding fasteners{{strike| ; plywood and non-veneered panel ''decks'' are exempted from this requirement || 2022-October-28 }}.
</li></ol>
<li>Securement of overlaid sheathing shall conform to the requirements for wood ''decks'' in this Part.
<li><span class="principles">All types of wood ''decks'' should be roofed promptly after installation</span>.
</li></ol>

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

<ol>
<li><span class="principles">Plywood panels should conform to CSA 0121, “Douglas Fir Plywood”, CSA 0151, “Canadian Softwood Plywood”, or CSA 0153, “Poplar Plywood”</span>, but in any event must conform to the requirements published in the Code having jurisdiction (See [[Notes to Hot Rubber Standard#A-2.1.5.4.(1)| {{hilite | Note A-2.1.5.4.(1) || 2024-October-20 }}]]).
<li>All plywood decks (notwithstanding the minimum requirements for plywood used to overlay mass timber and wood board ''decks''; see [[#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.]]) shall be constructed to conform to the "British Columbia Building Code" for either Part 3 or Part 9 buildings, and shall be
<ol>
<li>at least 12.7 mm (1/2”) thick, unless exceeded by the specified securement design (Ref. [[#Part 3 - Securing the Roof Assembly | Part 3, "Securing the Roof Assembly"]]),
<li>free of loose knots and cracks, which are considered defects and must be covered with sheet metal, mechanically fastened in place,
<li>securely fastened to roof framing, and installed so that the surface grain (plywood) runs at right angles to the roof framing,
<li>properly gapped between panels, and
<li>fully supported along all panel edges.
</li></ol>
<li>When a plywood ''deck'' is intended to support a ''protected roof system'' and a ''Vegetated Roof System'', 
<ol>
<li>{{strike| <span class="recommended">the plywood should be marine-grade T&G material at least 19.05 mm (3/4”) thick</span> || 2024-October-24 }}<span class="principles">{{hilite | the ''deck'' and any vertical planes that contact the ''vegetated roof system'' should be pressure-treated tongue-and-groove plywood at least 19.05 mm (3/4”) thick, but when the existing ''deck'' and adjoining ''wall'' surfaces are untreated wood, they should be overlaid with no less than one layer of an RGC-accepted deck overlay panel listed in [[Division C]] of this ''Manual'' || 2025-October-25 }}</span> (See [https://rpm.rcabc.org/index.php?title=Notes_to_VRA_Standard#A-2.1.5.1. Note A-2.1.5.1. Suitability of Roof Deck] in the "RGC Standard for Vegetated Roofs"), and
<li>the ''Design Authority'' shall be responsible to calculate the anticipated live and dead loads of the ''system'' and design suitable approaches to mitigate deflection.
</li></ol>
</li></ol>

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

<ol>
<li>Mass timber decks, which include cross-laminated timbers (CLT), nail-laminated timbers (NLT), dowel-laminated timbers (DLT), and traditional glue-laminated (Glulam) timbers, are acceptable to the '''''Guarantor''''' but must be overlaid with plywood conforming to the material requirements in [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]]
<li><span class="principles">{{hilite | A mass timber ''deck'' that will support a ''vegetated roof system'' may be overlaid with a vapour permeable membrane, followed by screw-fastened marine-grade T&G plywood at least 19.05 mm (3/4”) thick, to which the ''roof system'' may be applied || 2025-October-25 }}</span>.
</li></ol>

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

<ol>
<li>Non-veneered wood ''decks'' must be overlaid with plywood and are permissible only with the written consent of the ''manufacturer'', and only when permitted through a written Variance issued by the '''''Guarantor'''''.
</li></ol>

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

<ol>
<li>Wood board ''decks'' are not permitted in this Standard.
</li></ol>

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

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

====2.1.7.1. General====
<ol>
<li>''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''roof system'' materials.
<li>Wood or steel-stud ''walls'' must be sheathed with a material suitable for adhering membranes and securing metal flashings; {{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>''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 ''finished roof system surface'' (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]]).
<li>Indirect connections between walls and roofs require a ''control joint'' (See [[Notes to Hot Rubber Standard#A-10.1.6.2. | Note A-10.1.6.2.]]).
</li></ol>

===2.1.8. Electrical Cables and Boxes===
(See [[Notes to Hot Rubber 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 | ('''Figure 2.1.8.1.-A''')|| 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 | ('''Figure 2.1.8.1.-B''')|| 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 | ('''Figure 2.1.8.1.-C''')|| 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><span class="principles">{{hilite | Electrical cables installed above the ''roof assembly'' should be elevated to permit proper support, roof maintenance and future replacement roofing</span>|| 2021-February-7 }} {{hilite | ('''Figure 2.1.8.1.-D''')|| 2021-February-7 }}.
</li></ol>
<br>
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-A'''<br>'''Prohibited Installation of<br>Electrical Conduit'''<br>Forming Part of Sentence 2.1.8.1.(1) || 2025-October-25 }}<br><small>(Click to expand)</small> || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-B'''<br>'''Roof Decks and Electrical Conduit<br>Installation'''<br>Forming Part of Clause 2.1.8.1.(2)(1)<br> || 2025-October-25 }}<small>(Click to expand)</small>
|-
| [[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'''<br>'''Minimum Separation Between Roof Assembly<br>and Electrical Conduit'''<br>Forming Part of Clause 2.1.8.1.(2)(2) || 2025-October-25 }}<br><small>(Click to expand)</small> || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 2.1.8.1.-D'''<br>'''Electrical Conduit Elevated Above<br>Roof Assembly'''<br>Forming Part of Sentence 2.1.8.1.(4) || 2025-October-25 }}<br><small>(Click to expand)</small>
|-
| [[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">
<br>
</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><span class="principles">The ''Design Authority'' should</span> 
<ol>
<li><span class="principles">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 }}</span>, and
<li><span class="principles">provide the building owner with detailed as-built drawings that accurately map the location of electrical cables and boxes</span>.
</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”) (These panels are specifically designed to receive roof membranes and may be installed horizontally or vertically).
<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>

===2.3.2. 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=

<div style="width:150px; text-align: left;">
[[File:YVR Wind 1 (short).gif | link=https://youtu.be/H2P_OYvHZBM]]
</div>
<div style="text-align: left;">
Click on the gif above to see the '''full high-definition video''', which illustrates why ''roof system'' securement requirements matter ('''NOTE''': the video shows a mechanically fastened, conventionally insulated EPDM ''roof system'' constructed to the '''''RoofStar Guarantee''''' Standard of the time (2013).  The membrane "flutter" in wind is common for this type of ''roof system'').
</div>

==Section 3.1. Design==
===3.1.1. General===
====3.1.1.1. Scope====
(See [[Notes to SBS 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>{{hilite |This Part applies to all new roofs, and to both full and partial replacement ''roof systems''|| 2021-October-30 }}.
<li>{{hilite |This Part sets out the requirements for|| 2021-October-30 }} 
<ol>
<li>material substitution (applicable to ''Tested Assemblies''),
<li>fastener and adhesive application (minimum numbers and spacing),
<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>{{hilite |''Conventionally insulated roof systems'' designed and constructed with sheet membranes must be secured using|| 2021-October-30 }}
<ol>
<li>{{hilite |a ''Tested Assembly'' (a membrane ''roof system'', together with a specified roof ''deck'', tested for its wind resistance capabilities using CSA-A123.21, "Standard test method for the dynamic wind uplift resistance of membrane-roofing systems" (latest edition)|| 2021-October-30 }}(See [[Notes to SBS Standard#A-3.1.1.1.(4)| Note A-3.1.1.1.(4)]]), or
<li>{{hilite |an ''Assembly with Proven Past Performance'' (an existing, representative ''roof system'', together with a specified roof ''deck'', which is used as a “proven” pattern for securing a new ''roof system'' on the building under consideration; see [[#3.1.4.3. Specifying an Assembly with Proven Past Performance | Article 3.1.4.3.]])|| 2021-October-30 }}.
</li></ol>
<li>{{hilite |When neither of the foregoing options is available to the ''Design Authority'' to conform to the Code, the ''roof system'' must be secured using a custom engineered design (See [[#3.1.4.4. Specifying a Custom-engineered Securement Design | Article 3.1.4.4.]])|| 2021-October-30 }}.
</li></ol>

===={{hilite | 3.1.1.2. Intent || 2021-October-30 }}====
(See [[Notes to SBS 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 || 2021-October-30 }}====

<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>

====3.1.1.4. {{strike| Definitions || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].  Additionally, the following terms are used in this Part: 
<ol>
<li>''CSA Standard'' means the CSA-A123.21, "Standard test method for the dynamic wind uplift resistance of membrane-roofing systems" (latest edition).
<li>{{hilite | ''CSA VRA Standard'' means the CSA-A123.24, “Standard test method for wind resistance of vegetated roof assembly” || 2025-October-25 }}.
<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>{{hilite | ''System of securement'' means a specific pattern of mechanical fasteners or adhesives, including specific materials or brands, size, and spacing. || 2023-June-16 }}
</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''''', and shall
<ol>
<li>{{hilite |comply with the higher securement requirements when enhanced ''roof system'' securement is required by the membrane manufacturer, to meet their system warranty requirements ("enhanced securement" may exceed the securement stated or specified in a ''Tested Assembly'', an ''Assembly with Proven Past Performance'', or a custom-engineered design; see also [[#1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee | Article 1.1.2.1., "RoofStar 15-Year Guarantee"]], for further general requirements|| 2020-October-22 }}).
</li></ol>
</li></ol>

===={{hilite | 3.1.2.3. RoofStar Vegetated Roof Guarantee || 2025-October-25 }}====

<ol>
<li>To qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the supporting ''roof assembly'' shall 
<ol>
<li>comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''',
<li>be acceptable to the manufacturer as support for a ''vegetated roof system'', and
<li>comply with the related requirements in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”].
</li></ol>
</li></ol>

===3.1.3. All Systems===
====3.1.3.1. Responsibility for Design====

<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>

====3.1.3.2. Calculation of Specified Wind Loads====

<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 SBS 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''' || 2025-October-25 }}), 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''' || 2025-October-25 }}).
</li></ol>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.1.3.2.-A Principal Roof Zones''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 3.1.3.2. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:Figure 3.1.3.2.-A (Wind Zones).jpg|link=https://rpm.rcabc.org/images/9/9a/Figure_3.1.3.2.-A_%28Wind_Zones%29.jpg | 400 px]]
|}
<br>
<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''' || 2025-October-25 }}).
<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’) (See {{hilite | '''Figure 3.1.3.2.-B''' || 2025-October-25 }}).
<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"]).
<br><br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 3.1.3.2.-B Roofs Adjacent to Each Other''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 3.1.3.2. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:Figure 3.1.3.2.-B (Wind Zones).jpg|link=https://rpm.rcabc.org/images/6/64/Figure_3.1.3.2.-B_%28Wind_Zones%29.jpg | 550 px]]
|}
<br>
<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''' || 2025-October-25 }}).
<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 ''overburden'', amenities, or equipment.
</ol></li>
<li><span class="principles">''Roof systems'' should be designed in conjunction with the electrical systems for the building, to avoid unnecessary interference with ''roof system'' securement</span> (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 ''water-shedding system'' shall be made in accordance with the requirements in the applicable Standard.
<li>{{hilite | Wind loads for a ''roof assembly'' supporting a ''vegetated roof system'' shall be determined in accordance with the requirements of the Building Code and || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
{{strike| <li>''Vegetated Roof Systems'' specified for || 2024-October-24 }}
<ol>
{{strike| <li>buildings up to 20 m (65') in height shall be designed to resist ''Specified Wind Loads'' using the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Load Calculator for Vegetated Roof Assembly"] or, in the alternative, another method that is its equal or superior, and || 2024-October-24 }}
{{strike| <li>buildings greater than 20 m (65') in height shall be designed to resist '' Specified Wind Loads'' using methods that are acceptable to the ''Authority Having Jurisdiction'' (AHJ). || 2024-October-24 }}
</li></ol>
</li></ol>
</li></ol>

====3.1.3.3. Resistance to Specified Wind Loads====

<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></ol>

====3.1.3.4. Resistance to Other Loads====

<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>{{hilite | loads from ''overburden'' || 2023-June-16 }} (See [[#Part 14 - The Roof as a Platform | Part 14]]), and
<li>thermal expansion and contraction of the ''roof system'' components.
</li></ol>
<li>{{hilite | Where the roof is designed to support a ''vegetated roof system'', consideration for other loads shall conform to the requirements in|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#2.1.4.1._Structural_Loads {{hilite |Article 2.1.4.1.|| 2025-October-25 }}] {{hilite |of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
</li></ol>

====3.1.3.5. Submittals====

<ol>
<li>{{hilite | The '''''Guarantor''''' must receive from the ''Contractor'', prior to construction of the ''project'' and to document the ''roof system'' record || 2024-June-15 }},
<ol>
<li>{{hilite | a Tested Assembly report supplied or endorsed by a ''manufacturer'', including documentation of the substitution of any materials identified in that test report || 2024-June-15 }},
<li>{{strike| The ''Design Authority'' must submit documentation || 2023-June-15 }} {{hilite | a letter || 2024-June-15 }} in support of an {{hilite | ''Assembly with Proven Past Performance'' || 2025-October-25 }}{{strike| "System with Proven Past Performance" || 2024-October-24 }}, as required in [[#3.1.4.3. Specifying an Assembly with Proven Past Performance | Article 3.1.4.3.(2)]], {{hilite | or || 2024-June-15 }}
<li>{{hilite | a custom-engineered ''system'' for securing the ''roof assembly'' || 2024-June-15 }}.
</li></ol>
</li></ol>

===3.1.4. Reserved===

===3.1.5. Uninsulated Systems===
(The requirements in [[#3.1.3. All Systems | Subsection 3.1.3., "All Systems"]], shall be read together with the following articles)

====3.1.5.1. Securement against Specified Wind Loads====

<ol>
<li>All uninsulated ''roof systems'' must be designed to resist displacement by ''Specified Wind Loads'', using the options articulated in [[#3.1.4.1. Securement Against Specified Wind Loads | Article 3.1.4.1.]]
<li>{{hilite | Where air intrusion into the ''roof assembly'' could compromise its securement, every ''roof assembly'' design must provide guidance for the installation of ''control layers'', particularly where ''control layers'' intersect roof drains, penetrations, or assemblies adjacent to the roof (i.e., walls) (Ref. || 2024-June-15 }} [[#Part_6_-_Air_and_Vapour_Controls | Part 6, "Air and Vapour Controls"]]).
</li></ol>

===3.1.6. Protected Roof Systems===
(The requirements in [[#3.1.3. All Systems | Subsection 3.1.3., "All Systems"]], shall be read together with the following articles)

====3.1.6.1. Securement of Ballasted Roof Systems====
(See [[Notes to SBS Standard#A-3.1.6.1. | {{hilite | Note A-3.1.6.1. || 2024-October-20 }}]].  Also see [[#9.1.6. Protected Roof Systems | Subsection 9.1.6., "Protected Roof Systems"]])

<ol>
<li>''Roof systems'' secured with {{hilite | stone (gravel) || 2025-October-25 }} ballast, pavers, or a combination of each, must be designed to resist displacement by ''Specified Wind Loads'', regardless of any ''overburden'' the design may call for.
<li>The securement of all ''roof systems'' held in place by ballast must be designed by a ''registered professional'' "skilled in the work concerned" ("British Columbia Building Code", 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 Section 2.2., "Administration"]), and ballast rates shall conform to
<ol>
<li>the minimum requirements in {{hilite | '''Table 3.1.6.1.''' || 2025-October-25 }} (Ref. [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1., "Ballasted Systems"]], and [[#9.3.6. Protected Roof Systems | Subsection 9.3.6., "Protected Roof Systems"]]), or
<li>extrapolated values using ANSI-SPRI RP-4 (latest edition), "Wind Design Standard for Ballasted Single-ply Roofing Systems".
</li></ol>
<li>{{hilite | {{hilite | Stone ballast || 2025-October-25 }} size for all ballasted ''roof systems'' shall conform to ASTM D7655/D7655M-12, "Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems". || 2023-June-16 }}
<li>To facilitate resistance to ''Specified Wind Loads'',
<ol>
<li>a filter fabric is required beneath gravel or paver ballast, and
<li>a protection layer is required beneath crushed ballast.
</li></ol>
<li><span class="recommended">On roofs specified to utilize {{hilite | stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} ballast, no fewer than two parallel rows of pavers should be considered for ''Corner'' and ''Edge'' zones, to prevent or reduce wind scouring of the gravel</span>.
<li>When pavers are selected as ballast for a ''roof system'', the ''Design Authority'' must determine the support and placement of pavers to resist displacement by ''Specified Wind Loads''.
<li>{{hilite | ''Vegetated roof systems'' designed as ballast for a ''protected membrane roof assembly'' shall be designed in accordance with the requirements in|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#PART_3 {{hilite |Part 3|| 2025-October-25 }}] {{hilite |of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
</li></ol>
<br>
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 3.1.6.1.<br>Minimum Requirements for Stone Ballast''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 3.1.6.1. || 2025-October-25 }}<br><small>{{hilite | (Note: these requirements apply only where no other guidance for stone ballast<br>has been provied by the ''Design Authority'') || 2025-October-25 }}</small>
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! XPS Insulation<br>Thickness !! Stone Ballast Required Weight !! Minimum Ballast Depth<br>(approximate)<sup>†</sup>
|-
|  Up to 50.8 mm (2") ||  60 Kg/M<sup>2</sup> (12 lb./sf) ||  44.45 mm (1-3/4")
|-
|  76.2 mm (3") || 80 Kg/M<sup>2</sup> (17 lb./sf) || 57.15 mm (2-1/4")
|-
| 101.6 mm (4") || 108 Kg/M<sup>2</sup> (22 lb./sf) || 76.2 mm (3")
|-
| 125 mm (5") || 132 Kg/M<sup>2</sup> (27 lb./sf) || 88.9 mm (3-1/2")
|-
| 152.4 mm (6") || 156 Kg/M<sup>2</sup> (32 lb./sf) || 107.95 mm (4-1/4")
|-
| 177.8 mm (7") || 180 Kg/M<sup>2</sup> (37 lb./sf) || 125 mm (5")
|-
| 203.2 mm (8") || 204 Kg/M<sup>2</sup> (42 lb./sf) || 139.7 mm (5-1/2")
|-
|}
::<small><sup>†</sup> These minimum requirements should be noted by the ''registered professional'' <br>designing the ballast system.</small>

====3.1.6.2. Reserved====

===3.1.7. Roof Replacement and Alterations===
====3.1.7.1. Complete Roof System Replacement====

<ol>
<li>Complete ''roof system'' replacement ''projects'' must be designed to secure the new ''roof system'' against displacement by ''Specified Wind Loads''.
</li></ol>

====3.1.7.2. Partial Roof System Replacement====

<ol>
<li>Partial roof replacements must be designed to secure the ''roof system'' against displacement by ''Specified Wind Loads'', in keeping with the requirements in [[#3.1.3.2. Calculation of Specified Wind Loads | Article 3.1.3.2.]] (See also [[#3.3.6.2. Partial Roof Replacement | Article 3.3.6.2.]]).
<li>When specifying securement for a partial roof replacement, the securement system must be designed and specified by the ''Design Authority'' (See also [[#1.1.4. Replacement and Alterations | Subsection 1.1.4., "Replacement and Alterations"]]).
</li></ol>

==Section 3.2. Materials==
===3.2.1. Reserved===

===3.2.2. Securement Materials===
====3.2.2.1. Fasteners====

<ol>
<li>The minimum requirements in this Article apply to any ''roof system'', regardless of requirements published elsewhere.
<li><span class="principles">The ''Design Authority'' should specify the correct type of fastener, keeping in mind</span>
<ol>
<li><span class="principles">pull-out strength,</span> and
<li><span class="principles">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.)</span>.
</li></ol>
<li>Fasteners must be capable of securing the ''roof system'' components to resist ''Specified Wind Loads''.
<li>Unless otherwise permitted in writing by the ''manufacturer'', fasteners shall be resin-coated, self-drilling screws manufactured with recessed heads, and must be used in combination with plates, as shown in {{hilite | '''Table 3.2.2.1.''' || 2025-October-25 }}
</li></ol>
<br>
::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 3.2.2.1.<br>Minimum Fastener and Plate Requirements''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 3.2.2.1. || 2025-October-25 }}<br><small>{{hilite | (Note: these requirements apply only where no other guidance for fastener and plate types and sizes has been provided by the ''Design Authority'') || 2025-October-25 }}</small>
|-
|}
{|  class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"  
|-
! Material !! Fastener<br>Size !! Plate
|-
| Deck overlays || #12 || 73.03 mm (2-7/8”) Hexagonal, 76.2 mm (3”) Round or Square
|-
| Insulation || #12  || 73.03 mm (2-7/8”) Hexagonal, 76.2 mm (3”) Round or Square
|-
| Insulation Overlays || #12  || 73.03 mm (2-7/8”) Hexagonal, 76.2 mm (3”) Round or Square
|-
|  Membranes || #14  || Proprietary
|-
|}

====3.2.2.2. Adhesives====

<ol>
<li>Adhesives used to secure any ''roof system'' materials must be acceptable to the ''manufacturer'' and be capable of resisting ''Specified Wind Loads''.
</li></ol>

====3.2.2.3. Gravel Ballast====
(See also {{hilite | '''Table 3.1.6.1.''' || 2025-October-25 }} in [[#3.1.6.1. Securement of Ballasted Roof Systems | Article 3.1.6.1.]])

<ol>
<li>{{hilite | Stone (gravel) || 2025-October-25 }} ballast used to secure a ''roof system'' must be washed (clean) round or crushed stone and must conform to ASTM D7655/D7655M-12, "Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems", or to Table 3.3.
<li>The minimum requirements in this Article must not be reduced except by a written Variance that shall be endorsed in writing by the owner or the owner's representative, and submitted to the '''''RoofStar Guarantee Program''''' as part of the '''''Guarantee''''' record.
</li></ol>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 3.2.2.3.<br>Stone Ballast Size and Grades''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 3.2.2.3. || 2025-October-25 }}
|-
|}
:::{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Nominal size !! Percentage Passing 
|-
| 38.1 mm (1-1/2") ||  100% 
|-
|  25.4 mm (1") || 70 - 100% 
|-
| 19.05 mm (3/4") || 5 - 20 %
|-
| 12.7 mm (1/2")  || 0 - 6 %
|-
| 4.76 mm (3/16") || 0 - 2 %
|-
|}

====3.2.2.4. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) should be capable of resisting anticipated loads (i.e., hydraulically pressed concrete pavers).
<li>Pedestals
<ol>
<li><span class="principles">should be adjustable when a level surface is required</span>,
<li>must be purpose-made, and 
<li>must include an integral spacer rib measuring at least a 3mm (⅛”) in width, to uniformly separate pavers.
</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>

===3.3.2. All Systems===
====3.3.2.1. Reserved====

====3.3.2.2. Reserved====

====3.3.2.3. Securing Roofs with Overburden====

<ol>
<li>Any ''overburden'', including ''vegetated roof systems'', must be installed in keeping with the designed securement methods and systems specified by the ''Design Authority'', {{hilite | and {{strike| in alignment with || 2024-October-25 }} shall also conform to the the requirements in || 2025-October-25 }} [[#Part 14 - The Roof as a Platform | Part 14]] {{hilite | of this Standard and to both Part 3 and [https://rpm.rcabc.org/index.php?title=VRA_Standard#PART_10 Part 10] of the “RGC Standard for Vegetated Roofs” || 2025-October-25 }}.
</li></ol>

===3.3.3. Reserved===

===3.3.4. Uninsulated Systems===
(The requirements in [[#3.3.2. All Systems | Subsection 3.3.2., "All Systems"]], shall be read together with the following articles)

====3.3.4.1. General Requirements====

<ol>
<li>All uninsulated ''roof systems'' that are not secured with ballast shall conform to the requirements in [[#3.1.4.1. Securement Against Specified Wind Loads | Article 3.1.4.1.]] for ''conventionally insulated systems''.
<li>Uninsulated ''roof systems'' secured with {{hilite | stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} ballast, pavers or both must be installed following the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]]
</li></ol>

===3.3.5. Protected Roof Systems===
(The requirements in [[#3.3.2. All Systems | Subsection 3.3.2., "All Systems"]], shall be read together with the following articles)

====3.3.5.1. Ballasted Systems====
(Note: the reader must consult the Design and Application requirements for ''protected roof systems'' in [[#Part 9 - Roof Field (Membrane Systems) | Part 9]]).

<ol>
<li>''Roof systems'' secured with {{hilite | stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} ballast, pavers, or both must be constructed to resist displacement by ''Specified Wind Loads''.
<li>To facilitate resistance to ''Specified Wind Loads'',
<ol>
<li>a filter fabric is required beneath {{hilite | stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} or paver ballast,
<li>a protection layer is required beneath crushed ballast, and
<li>{{hilite | stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} ballast must conform to the specified design.
</li></ol>
<li>{{hilite | Stone || 2025-October-25 }}{{strike| gravel || 2024-October-25 }} ballast shall 
<ol>
<li>be washed (clean) round or crushed {{hilite | material || 2025-October-25 }}{{strike| stone || 2024-October-25 }}, and
<li>be selected (according to the specified design) to resist flotation and ''Specified Wind Loads''.
</li></ol>
<li>Pavers and unit-type masonry, such as brick or {{hilite | paving stones || 2025-October-25 }}, must be supported by
<ol>
<li>purpose-made pedestals conforming to the requirements in [[#3.2.2.4. Pavers and Pedestals | Article 3.2.2.4.]],
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1”) in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals 
<ol>
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling,
<li><span class="principles">should not impede the flow of water or air, and</span>
<li><span class="principles">should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads</span>.
</li></ol>
<li>Pavers must be tied together when specified by the design.
<li>{{hilite | When a ''vegetated roof system'' is used as ballast, the installation shall conform to|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#PART_10 {{hilite |Part 10|| 2025-October-25 }}] {{hilite |of the “RGC Standard for Vegetated Roofs” (See also|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#PART_3 {{hilite |Part 3|| 2025-October-25 }}] {{hilite |in the same Standard, concerning design requirements)|| 2025-October-25 }}.
</li></ol>

===3.3.6. Roof Replacement and Alterations===
====3.3.6.1. Complete Roof System Replacement====

<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>

====3.3.6.2. Reserved====

<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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

==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>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===
====4.3.1.1. 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>

===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 superseded by this Standard.
</li></ol>

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

=Part 5 - Deck and Wall Overlays=
(See [[Notes to Hot Rubber 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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to Hot Rubber Standard#A-5.1.3.1.| Note A-5.1.3.1.]]; see also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>A deck or wall overlay must be specified when</span>
<ol>
<li>a thermal layer is required by the Building Code, or
<li>the conditions of the deck or wall are unsuitable for receiving roofing materials.
</li></ol>
<li><span class="principles">When a roof design includes any type of ''overburden'', the ''deck'' overlay on steel ''decks'', or on wood ''decks'' less than 25.4 mm (1”) thick, should be at least 15.88 mm (5/8”) thick, to stiffen the supporting surface and reduce ''deck'' deflection</span>.
</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 (Membrane 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>

===5.3.2. 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
<ol>
<li>four (4), for every 1219.2 mm x 2438.4 mm (48" x 96") sheet, unless exceeded by the specified design.
</li></ol>
</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>A ''deck'' overlay board is not mandatory on a concrete supporting ''deck'', but when it is specified, it must be installed to conform to the requirements in this Part.
</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 Hot Rubber Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to Hot Rubber 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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

===6.1.3. 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 Hot Rubber Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li><span class="recommended">The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications</span>.
<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 (some air ''control layers'' are considered vapour permeable, others vapour-impermeable); <span class="recommended"> ''roof systems'' intended to qualify for a</span> '''''RoofStar Guarantee''''' <span class="recommended">should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''</span>.
<li><span class="principles">{{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"]</span>.
</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><span class="recommended">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</span>; 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 Hot Rubber 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><span class="recommended">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</span>.
<li><span class="principles">Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf)</span> (Ref. CGSB-37.56-M for both test method and standard limits) <span class="principles">and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.</span>
<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><span class="recommended">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 bituminous membrane is recommended</span>.
</li></ol>

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

<ol>
<li><span class="principles">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.
<li>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.
</li></ol>

====6.2.1.5. Reserved====

==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>

===6.3.2. 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>ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''roof assembly'', 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</span> must be smooth and uniform, without wrinkles or fish-mouths, and must also 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 | ''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 }}.
</ol></li>

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

<ol>
<li>The application of materials to an unprotected combustible material, using a torch, is strictly prohibited.
<li>All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials
<ol>
<li>on ''decks'', ''walls'', blocking, and canted edges, and
<li>that are hidden or obscured within voids, cracks, or orifices. 
</li></ol>
<li>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.
<li>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"]].
</li></ol>

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

<ol>
<li><span class="principles">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</span>.
</li></ol>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-A Air, Vapour Controls Over Steel Deck<br>With Metal Support'''<br>Forming Part of Sentence 6.3.2.1.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 6.3.2.1.-B Air, Vapour Controls Over Steel Deck<br>With Deck Overlay Panel'''<br>Forming Part of Sentence 6.3.2.1.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }}
|-
| [[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]]
|}

====6.3.2.4. 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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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 heat from liquefied bitumen.  Insulation boards of this type include fibreboard, polyisocyanurate, and mineral fibre ("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 fibre 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>

===={{hilite | 7.1.2.2. Reserved || 2025-October-25 }}====

===={{hilite | 7.1.2.3. RoofStar Vegetated Roof Guarantee || 2025-October-25 }}====

<ol>
<li>To qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the supporting ''roof assembly'' shall 
<ol>
<li>comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''',
<li>be acceptable to the ''manufacturer'' as support for a ''vegetated roof system'', and
<li>comply with the related requirements in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”].
</li></ol>
</li></ol>

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to Hot Rubber 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====

<ol>
<li>Selected board insulation products may be used within the membrane ''roof systems'', provided the panels are listed in [[Division_C | Division C]], and conform to the material specifications in [[#Section 7.2. Materials | Section 7.2.]]
</li></ol>

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

<ol>
<li>Existing insulation on a roof may be reused (it will be excluded from coverage under the '''''Guarantee''''', which applies only to new materials), provided
<ol>
<li>the ''Design Authority'' has specified its reuse, and
<li>the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code.
</li></ol>
</li></ol>

====7.1.3.4. Effective Thermal Resistance and Layering====
(See [[Notes to Hot Rubber Standard#A-7.1.3.4.| {{hilite | Note A-7.1.3.4.|| 2025-October-25 }}]])

<ol>
<li>{{hilite | All insulated roofs|| 2025-October-25 }}{{strike| Insulation  ''assemblies'' || 2024-November-1 }} 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'''|| 2025-October-25 }}).
<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)''' || 2025-October-25 }}. || 2023-June-16 }}
</li></ol>
<br>
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 7.1.3.4.(2) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:7.1 Insulation Layering.jpg|link=http://rpm.rcabc.org/images/d/d4/7.1_Insulation_Layering.jpg | 550 px]]
|}

===7.1.4. Reserved===

===7.1.5. Reserved===

===7.1.6. Protected Roof Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.6.1. Insulation Selection====

<ol>
<li>Only extruded polystyrene insulation (XPS) may be specified for a ''protected roof system''.
</li></ol>

====7.1.6.2. Drainage Mats and Filter Fabric====

<ol>
<li>{{hilite | At least one drainage layer is required in a ''protected membrane roof system'', either above or below the XPS insulation, but || 2025-October-25 }}
<ol>
<li>{{hilite | when openings in ''walls'' or roof penetrations provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and || 2025-October-25 }}
<li>{{hilite | a drainage layer shall be specified above the XPS insulation when any ''overburden'' superimposed on the ''roof system'' will result in a “vapour-closed” condition (i.e., a ''vegetated roof system'' or an impermeable wearing course) || 2025-October-25 }}.
</li></ol>
<li>{{hilite | Subject to the conditions in Sentence (1), a drainage layer below the XPS insulation in a ''vegetated roof assembly'' may be omitted|| 2025-October-25 }} ([https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.1._General_Requirements_for_Water_Management {{hilite |Sentence 6.1.3.1.(5)|| 2025-October-25 }}]{{hilite |, “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}).
<li>Filter fabric must be specified to cover XPS insulation, to
<ol>
<li>contain the insulation and thereby prevent ‘insulation stacking’ (displacement) when insulation boards become buoyant in water, and
<li>prevent fines from settling at the membrane level and filling the voids between insulation board joints.
</li></ol>
</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><span class="recommended">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</span>. 
</li></ol>
</li></ol>

====7.2.1.3. Drainage Mats====

<ol>
<li>Drainage mats {{hilite | used in ''protected membrane roof assemblies'', or used where ''overburden'' superimposed on the ''roof assembly'' requires an additional drainage layer, || 2025-October-25 }} shall conform to the requirements in [[#14.2.1.4. Drainage and Water Retention Materials | Article 14.2.1.4.]]
<li>{{hilite | Drainage mats that form part of a ''vegetated roof assembly'' shall conform to the requirements in|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.2.1.2._Drainage_Layers {{hilite |Article 6.2.1.2.|| 2025-October-25 }}]{{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
</li></ol>

====7.2.1.4. Filter Fabric====

<ol>
<li>Filter fabrics {{hilite | for ''protected membrane roof assemblies'' || 2025-October-25 }} shall conform to the requirements in [[#14.2.1.6. Filter Fabric | Article 14.2.1.6.]]{{hilite | , but filtration layers that form part of a ''vegetated roof assembly'' shall conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.2.1.3._Filtration_Layers Article 6.2.1.3.] of the “RGC Standard for Vegetated Roofs” || 2025-October-25}}.
</li></ol>

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

<ol>
<li>{{hilite | Insulation boards|| 2021-June-30 }}
<ol>
<li>{{hilite | must be clean, and dry to the touch || 2025-October-25 }},
<li>{{hilite | must be firmly supported|| 2021-June-30 }},
<li><span class="principles">should be square and should make firm, full contact with adjacent panels,</span>
<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>{{hilite | shall not be soldiered and || 2025-October-25 }} must be {{hilite | laterally || 2025-October-25 }} offset at least 304.8 mm (12") {{hilite | in two directions || 2025-October-25 }}, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See {{hilite | '''Figure 7.3.2.2.-A''' || 2025-October-25}}).
</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>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' || 2025-October-25 }}<br>{{hilite | Forming Part of Clause 7.3.2.2.(1)(4) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:Figure 7.3.2.-A (XPS).jpg|link=https://rpm.rcabc.org/images/1/15/Figure_7.3.2.-A_%28XPS%29.jpg | 500 px]]
|}
<br>
<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''' || 2025-October-25 }}|| 2022-February-5 }}).
<br>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' || 2025-October-25 }}<br>{{hilite | Forming Part of Clause 7.3.2.2.(3) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:Figure 7.3.2.-B Hot Rubber SMALL.jpg|link=https://rpm.rcabc.org/images/0/05/Figure_7.3.2.-B_Hot_Rubber_SMALL.jpg | 500 px]]
|}
</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></ol>

====7.3.2.4. Reserved====

===7.3.3. Reserved===

===7.3.4. Reserved===
===7.3.5. Protected Roof Systems===
(The requirements in [[#7.3.2. All Systems | Subsection 7.3.2., "All Systems"]], shall be read together with the following articles)

====7.3.5.1. Sequencing of Work====

<ol>
<li>Insulation installed against walls or curbs must be separated from roof membranes with a non-bonding drainage mat or slip sheet.
<li>Insulation must be secured and protected immediately after installation.
</li></ol>

====7.3.5.2. Drainage Mats====
(See also [[#Part 11 - Drainage | Part 11, "Drainage"]])

<ol>
<li>{{hilite | At least one drainage layer is required in a ''protected membrane roof system'' and its location within the system shall conform to the design requirements in || 2025-October-25 }} [[#7.1.6.2. Drainage Mats and Filter Fabric| {{hilite | Sentence 7.1.6.2.(1) || 2025-October-25 }}]]. 
<li>A drainage mat must be installed below the XPS insulation. 
<li>A second drainage layer may be installed above the insulation but is at the discretion of the ''Design Authority''.
<li>If a second drainage layer is specified, a vertical separation space measuring at least 12.7 mm (1/2″) must be preserved between the drainage layer and any ballast or overburden, to permit airflow and to assist in leveling.
<li>Specialized proprietary drainage products must be acceptable to the membrane manufacturer.
<li>Ballast guards must be installed around all roof drains.
</li></ol>

====7.3.5.3. Filter Fabric====

<ol>
<li>Fabric filter mats must be
<ol>
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or roof covering,
<li>overlapped at all edges a minimum of 304.8 mm (12”),
<li>at least 2438.4 mm x 2438.4 mm (96" x 96") in size, and
<li>slit to fit over roof penetrations or cut out around roof drains and other openings.
</li></ol>
<li>Filter fabric must extend up perimeter edges and ''curbs'' and must be placed loose (unattached) under metal counter flashings or wall finishes.
<li>{{hilite | When the filtration layer is part of a ''vegetated roof assembly'', the filtration layer shall conform to|| 2025-October-5 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.7._Installation_of_Void_Fill_and_Filtration_Layers {{hilite |Article 10.3.2.7.|| 2025-October-5 }}]{{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-5 }}. 
</li></ol>

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

=Part 8 - Reserved=

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

=Part 9 - Roof Field (Membrane 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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

===={{hilite | 9.1.2.2. Reserved || 2025-October-25 }}====

===={{hilite | 9.1.2.3. RoofStar Vegetated Roof Guarantee || 2025-October-25 }}====

<ol>
<li>To qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the supporting ''roof assembly'' shall 
<ol>
<li>comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''',
<li>be acceptable to the manufacturer as support for a ''vegetated roof system'' (with consideration to added hydrostatic pressure – see [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.4.1._Supporting_Roof_Assemblies Article 1.1.4.1.]] in the “RGC Standard for Vegetated Roofs”), and
<li>comply with the related requirements in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”].
</li></ol>
</li></ol>

===9.1.3. All Systems===
====9.1.3.1. General Requirements====

<ol>
<li>Construction sequencing of "hot fluid-applied rubberized asphalt roof systems" begins with perimeters and penetrations, and therefore this Part must be read together with the requirements in Part 10, "Perimeters and Walls", Part 11, "Drainage", and with Part 12, "Penetrations and Curbs".
<li>Specifications, details, and installation techniques must conform to the membrane manufacturer's requirements.
<li>Hot fluid-applied rubberized asphalt membranes
<ol>
<li>are suitable only for ''protected roof systems'',
<li>must be specified for installation on an acceptable supporting ''deck'' structure and, if so required, over a deck overlay that is properly secured to the deck,
<li>must consist of no fewer than two (2) coats, reinforced between the coats with the ''manufacturer’s'' proprietary reinforcement material, and
<li>must be specified to include protection materials accepted by the '''''Guarantor''''' and listed by the ''manufacturer'' as suitable for the purpose.
</li></ol>
<li>All ''deck'' joints, minor cracks and deck overlay joints must be prepared to receive the primary membrane; refer to [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]] for application requirements.
<li>When a ''roof system'' installed on a concrete ''deck'' or concrete topping is uninsulated, the concrete must be prepared with primer, when specified by the ''manufacturer''.
<li>{{hilite | Membranes may not be adhered to lightweight insulation concrete unless expressly permitted by the ''manufacturer''|| 2025-October-25 }}. 
</li></ol>

====9.1.3.2. Control Joints (Roof Dividers)====

<ol>
<li>When ''control joints'' (roof dividers) are recommended or required by the ''manufacturer'', or are deemed necessary by the ''Design Authority'', they must be designed following the requirements in [[#10.1.6.2. Control Joints (Roof Dividers) | Article 10.1.6.2.]]
</li></ol>

====9.1.3.3. Securement====

<ol>
<li>The ''roof system'' must be secured to resist displacement by ''Specified Wind Loads'', and therefore the requirements in this Article shall be read together with the requirements in [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard.
</li></ol>

====9.1.3.4. Membrane Protection====

<ol>
<li>The design must specify immediate protection of a newly installed, fully reinforced membrane, using materials specified or deemed suitable by the ''manufacturer''.
<li>Installed membranes must be protected from damage caused by
<ol>
<li>any walkway surface,
<li>work performed concurrently or subsequently by other trades (the ''Design Authority'' is strongly urged to direct the work of other trades through specific, explicit directives in the design specifications), and
<li>chemicals or other contaminants that may adversely impact the roof membrane or other ''system'' components, including (without limitation)
<ol>
<li>animal or vegetable grease,
<li>hot pipes (release valves),
<li>petroleum products or bi-products, and
<li>{{hilite | miscellaneous fluids from equipment|| 2020-July-3 }}, detrimental to the membrane.
</li></ol>
</li></ol>
</li></ol>

====9.1.3.5. Walkways====

<ol>
<li>
<li>The membrane must be suitably protected from mechanical damage by walkway surfaces.
<li>Paver walkway surfaces must be suitably supported in keeping with [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]] and [[#14.3.2.5. Wearing Surfaces | Article 14.3.2.5., "Wearing Surfaces"]].
</li></ol>

===9.1.4. Reserved===

===9.1.5. Uninsulated Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.5.1. General Requirements====

<ol>
<li>The installed membrane must be immediately protected with materials specified or deemed suitable by the ''manufacturer''.
</li></ol>

===9.1.6. Protected Roof Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.6.1. General Requirements====

<ol>
<li>Ballasted systems shall conform to the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]] and [[#9.1.3.3. Securement | Article 9.1.3.3.]]
</li></ol>

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

===9.2.1. Material Properties===
====9.2.1.1. Membrane Composition, Thickness, and Selection====

<ol>
<li>Hot fluid-applied rubberized asphalt membranes must be selected from the list of accepted materials published in [[Division C | Division C]] of this ''Manual'', and must conform to 
<ol>
<li>CAN/CGSB-37.50-M89, and
<li>acceptance criteria published in this ''Manual''.
</li></ol>
<li>Field membrane reinforcement scrim must be a spun-bonded polyester fabric weighing no less than 30 g/m2 (1.3 oz/yard2).
</li></ol>

====9.2.1.2. Reserved====

====9.2.1.3. Protection Materials====

<ol>
<li>Materials used to protect the primary membrane must be acceptable to and specified by the ''manufacturer''.
<li>Asphaltic core boards must be at least 3.78 mm (1/8") thick and conforming to CSA-A123.25.
<li>SBS-modified bituminous sheet membranes must be
<ol>
<li>reinforced with a non-woven polyester scrim no less than 180g/m2, or with a composite scrim of equal puncture resistance,
<li>no less than 2.0 mm (80 mils) thick, when measured in the middle of the membrane sheet, and
<li>sanded on the underside.
</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"]]).
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Membrane 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>

===9.3.2. All Systems===
====9.3.2.1. Preparation of Substrate====

<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 }} [[Hot_Rubber_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>Joints and cracks in a deck, or between overlay panels, must be flashed before the membrane is installed; flashing materials shall be
<ol>
<li>acceptable to the manufacturer,
<li>centered over the crack or joint,
<li>at least 152.4 mm (6”) wide,
<li>embedded in a base coat of warm membrane at least 3.2 mm (125 mils) thick,
<li>overlapped with adjoining reinforcement materials by at least 25.4 mm (1”),
<li>covered with a second (top) coat of hot membrane at least 3.2 mm (125 mils) thick, and
<li>fully integrated with the primary membrane system.
</li></ol>

<li>A properly secured, accepted overlay board is required (ref. [[#Part 5 - Deck and Wall Overlays | Part 5]])
<ol>
<li>for any ''deck'' 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>for any ''deck'' that cannot be repaired or otherwise made suitable for roofing, and
<li>for mass timber decks (plywood overlay shall conform to the requirements in [[#5.2.1.1. Suitability of Overlays| Article 5.2.1.1.]]
</li></ol>
<li>Substrates must be primed, if required by the ''manufacturer''.
<li>All plane transitions must be prepared or reinforced in the manner specified by the ''manufacturer''.
<ol>
<li>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>must be finished by others to render a surface profile range suitable to the membrane manufacturer, to facilitate a ‘mechanical bond’ between the substrate and the membrane, and
<li>constructed with pre-cast panels must be made continuous and even; all side and end-joints must be filled and reinforced according to the ''manufacturer’s'' published requirements.
</li></ol>
<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>Primary membrane product cakes must be
<ol>
<li>heated in a double-jacketed oil bath or hot-air melter to a temperature specified by the ''manufacturer'', and shall not be heated beyond the specified maximum,
<li>maintained at a safe operating temperature, established by the ''manufacturer'', and
<li>continually agitated until installed; <span class="principles">avoid heating and agitating the same material for more than six hours</span>.
</li></ol>
</li></ol>

====9.3.2.3. General Requirements for Membrane Application====

<ol>
<li>The requirements in this Part must be applied simultaneously with the requirements in [[#Part 10 - Perimeters and Walls | Part 10, "Perimeters and Walls"]], [[# | Part 11, "Drainage"]], and [[#Part 12 - Penetrations and Curbs | Part 12, "Penetrations and Curbs"]], because of natural sequencing of hot fluid-applied rubberized asphalt systems.
<li>Only trained, ''manufacturer''-qualified installers may apply hot fluid-applied rubberized asphalt membranes.
<li>Hot fluid-applied rubberized asphalt must be applied 
<ol>
<li>to small areas with a long-handled, straight-edged rubber blade squeegee, 
<li>following a grid pattern,
<li>in even coats,
<li>without bubbles, pinholes, and blisters, and
<li>at the ''manufacturer’s'' specified temperature, when measured at the point of application.
</li></ol>
<li>The base coat of hot fluid-applied rubberized asphalt shall be installed uniformly, and shall have a measured, thickness no less than 2.3 mm (90 mils), but this minimum may be exceeded by the ''manufacturer’s'' specifications (thickness shall be periodically verified with a probe, and recorded).
<li>Reinforcement fabric
<ol>
<li>must be broomed into the hot base coat,
<li>must be installed in parallel overlapping runs,
<li>must be saturated by the hot primary membrane,
<li>must overlap adjacent fabric runs as specified by the ''manufacturer'' and shall be no less than 12.7 mm (1/2”) (Membrane must overlap adjacent fabric runs so that the overlap is "wet to wet"; a wider overlap must be avoided because it risks the possibility of non-bonding reinforcement materials because of "dry-to-dry" application), and
<li>should avoid folds, air pockets or wrinkles.
</li></ol>
<li>The topcoat of hot fluid-applied rubberized asphalt must be installed uniformly
<ol>
<li>over a hot, reinforced base coat,
<li>on the same working day, and
<li>to a minimum measured wet thickness of 3.2 mm (125 mils), unless exceeded by the ''manufacturer’s'' specifications (thickness shall be periodically verified with a probe, and recorded).
</li></ol>
<li>The finished membrane shall have a nominal measured wet thickness of 5.5 mm (215 mils).
<li>The membrane protection layer specified by the ''manufacturer'' and accepted by the '''''Guarantor''''' must be installed as the membrane topcoat is applied.
<li>Each installed area of the primary membrane, reinforcement and protection materials must overlap adjacent area by at least 76.2 mm (3”), and all overlapping joints must be ''fully bonded''.
<li>When the installation of hot fluid-applied rubberized asphalt must be continued the next working day, the working edge must be kept clean, dry, and free of contamination, to ensure ''continuity'' of all constituent layers.
<li>Before any roof covering, structure or equipment is installed, roof membranes must be
<ol>
<li>inspected,
<li>scanned for breaches, when an integrity scan is required by this Standard, and
<li>free of deficiencies.
</li></ol>
</li></ol>

====9.3.2.4. Cold and Inclement Weather Application====

<ol>
<li>Installation during cold weather must follow the ''manufacturer’s'' guidelines for storage and membrane conditioning.
<li>When permitted by the ''manufacturer'', membranes may be applied in ambient air temperatures lower than -18⁰ C (0⁰ F), but <span class="recommended">application below -18⁰ C is not recommended</span>.
<li>Membranes shall not be installed in inclement weather unless expressly permitted by the ''manufacturer'', in writing.
</li></ol>

====9.3.2.5. Securement on Slopes====

<ol>
<li>Membrane installed on slopes greater than 1:6 (2” in 12”) shall be applied following the manner specified by the ''manufacturer''.
</li></ol>

====9.3.2.6. Reserved====

====9.3.2.7. Protection of Membranes====

<ol>
<li>The membrane protection layer specified by the ''manufacturer'' and accepted by the '''''Guarantor''''' must be embedded into the membrane as the topcoat is applied (also refer to the requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]]).
<li>All protection materials must be covered with a drainage mat before any other materials are installed.
<li>Installed membrane must be covered by the rest of the ''roof system'' or ''overburden'' within 30 days of completion.
<li>The ''Contractor'', and other trades who use primers for self-adhering membranes typically installed on ''walls'' or around doors, window, or other ''wall penetrations, must protect membranes
<ol>
<li>from splashed or dripped primer used to enhance adhesion of self-adhering membranes, as the primer may damage the membranes and cause leaks, and
<li>from accidental damage, including damage by staged materials, scaffolding, foot and equipment traffic, and anything else that may pose a hazard to the integrity of the membrane.
</li></ol>
</li></ol>

====9.3.2.8. Transitions with Water-shedding Systems====

<ol>
<li>{{hilite |Where slopes less than 1:16 (¾" in 12") intersect  a ''water-shedding system'', the ''waterproofing system'' must be designed to extend up the ''water-shedding system'' slope as described in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]], using methods conforming to the general application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]] || 2020-July-3 }}
</li></ol>

====9.3.2.9. Walkways====

<ol>
<li>When pavers are used as the walkway material, they must be 
<ol>
<li>spaced no closer than 3.78 mm (1/8″),
<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation to permit adequate airflow and leveling {{hilite | (Slip sheets under pedestals may be necessary to prevent membrane abrasion) || 2020-July-3 }}, and
<li>{{hilite | secured against displacement by wind. || 2020-February-15 }}
</li></ol>
</li></ol>

===9.3.3. Reserved===

===9.3.4. Reserved===

===9.3.5. Uninsulated Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.5.1. Reserved====

====9.3.5.2. Membranes Installed on Concrete====

<ol>
<li>Concrete decks shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], and application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]]
</li></ol>

====9.3.5.3. Membranes Installed on Wood Decks====

<ol>
<li>Wood decks shall conform to the requirements for wood ''decks'' in [[#2.1.5. Roof Decks | Subsection 2.1.5.]], shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], and application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]]
</li></ol>

====9.3.5.4. Reserved====

====9.3.5.5. Reserved====

====9.3.5.6. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
<li>The field membrane in an ''uninsulated roof system'' must be protected with
<ol>
<li>an asphaltic board when the roof is covered with ''overburden'', or
<li>a granule-surfaced SBS-modified bitumen membrane when the roof is exposed.
</li></ol>
</li></ol>

===9.3.6. Protected Roof Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.6.1. Reserved====

====9.3.6.2. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing.
</ol></li>

====9.3.6.3. Procurement and Installation of Other Materials====

<ol>
<li>All components, including the gravel or paver ballast, must be supplied and installed by the ''Contractor''.
<li>{{hilite | Where a ''vegetated roof system'' (VRS) is used as ballast and the ''VRS'' || 2025-October-25 }}
<ol>
<li>{{hilite | is intended to qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the VRS shall conform to the design, material, and construction requirements of the || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard {{hilite |“RGC Standard for Vegetated Roofs” || 2025-October-25 }}].
<li>{{hilite | is not intended to qualify for a '''''RoofStar Vegetated Roof Guarantee''''',|| 2025-October-25 }} may be installed by others but 
<li>the work must be coordinated with the ''Contractor'', and
<li>the VRS must be installed immediately upon completion of the ''Contractor’s'' work, to ensure the ''roof system'' is held in place (See also [[#14.1.3.12. Vegetated Roof Systems | Article 14.1.3.12.]]).
</ol></li>
</ol></li>
</ol></li>

<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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

===10.1.3. 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 ''control 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>Wall surfaces must be suitable to receive roof materials, or they must be covered with an accepted overlay panel material listed in [[Division_C | Division C]].
<li>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.
<li>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 (See [[Notes to Hot Rubber Standard#A-10.1.3.2.(5)| Note A-10.1.3.2.(5)]]).
</li></ol>

====10.1.3.2. Membrane 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 
<ol>
<li>hot fluid-applied rubberized asphalt, protected with metal flashing,
<li>hot fluid-applied rubberized asphalt and an embedded SBS-modified bitumen cap membrane flashing,
<li>two plies of an SBS-modified membrane system, or
<li>a liquid flashing membrane system.
</li></ol>
<li>No UV-sensitive membrane may be left exposed and must be fully protected with 
<ol>
<li>the ''manufacturer’s'' proprietary protection material, or
<li>base metal flashings.
<li>All other specifications shall follow the application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>
<li>Sheet membrane flashing must be self-adhered, adhered with adhesives, or with torch-applied heat, and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>''Linear metal flashing'', or a RoofStar-accepted, fleece-reinforced 2-component polymethyl methacrylate (PMMA) liquid membrane flashing, is required at all roof edges, upper membrane terminations, curb tops, and at the tops of parapets, to protect sheet membrane flashing from damage.
<li>''Linear metal flashing'' used for the termination of sheet membrane flashing plies shall be installed in keeping with [[#13.1.3.3. Securement | Article 13.1.3.3., "Securement"]].
<li>Sheet membrane flashing must be protected from damage caused by foot traffic or shifting coverings, using base metal flashing or other methods acceptable to the '''''Guarantor'''''.
<li>Where a roof allows water to freely drain off the edge, and the roof adjoins a ''wall'', a cricket or diverter should be installed at the roof edge to prevent water intrusion behind wall finishes.
</li></ol>

==={{hilite | 10.1.4. Perimeter Details, High Walls, and Openings|| 2021-October-30 }}===
(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. Parapets====

<ol>
<li>{{hilite | Parapets may be waterproofed before a coping, its membrane, and metal coping (cap) flashing are installed, but the coping will be excluded from coverage unless the parapet membranes are carried onto and over the coping in accordance with the application requirements described in || 2024-January-31 }} [[#10.3.4.1. Parapets | Article 10.3.4.1.]]
<li>On roofs where ''overburden'' or ballast extends to the roof edge, ''parapets'' must be designed to retain the material against wind scouring, but in any event, they shall be no less than 203.2 mm (8”) in height when measured from the top of the ''finished roof system surface''.
<li>''Parapets'' are optional, but when a parapet is specified it must be no less than 127 mm (5") in height, measured from the ''finished roof system surface'' to the inside top edge of the ''parapet'' (this height requirement facilitates proper metal cap flashing securement) (Ref. [[#10.3.4.1. Parapets | Article 10.3.4.1.]]; also see [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3., "Cap Flashing, Counter-flashing, and Reglet Flashing"]]).
<li>{{hilite | ''Parapets'' with cavities must be designed with consideration for ventilation. || 2024-January-31 }}
<li>{{hilite | All ''parapet'' copings that form part of the Contractor’s scope of work must provide solid support for metal coping (cap) flashings and shall be suitable to receive mechanical fasteners (Ref. || 2024-January-31}} [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]; {{hilite | also see || 2024-January-31 }} [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
<li>{{hilite | When the width of any ''parapet'' exceeds 101.6 mm (4"), the coping (installed by other trades) must || 2024-January-31 }} 
<ol>
<li>{{hilite | slope toward the roof-side of the ''parapet wall'', and shall || 2024-January-31}}
<li>{{hilite | be sloped to meet the minimum requirements for metal coping (cap) flashing in Table 13.1.-A, || 2024-January-31 }} [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]]
</li></ol>
<li>{{hilite | Membranes specified for parapets with a pre-cast or stone coping must be at least 2.5 mm thick and shall be manufactured with a sanded top surface. || 2024-June-15 }}
</li></ol>

====10.1.4.2. Low Profile Edges====

<ol>
<li>A metal-edge termination detail may be used on an ''uninsulated roof system'' but must be fully blocked to support the metal and membrane edges.
<li>Canted edges may be retained on existing roofs, but
<ol>
<li>this shall be at the discretion of  the ''Design Authority'', and
<li>the canted substrates must be wood.
</li></ol>
<li>When, for aesthetic reasons, face-fastened metal flashing covering a canted edge is not desirable, cants may be replaced with
<ol>
<li>a metal edge roof termination, or
<li>a ''parapet'', designed and constructed in keeping with the minimum requirements in [[#10.1.4.1. Parapets | Article 10.1.4.1.]] and [[#10.3.4.1. Parapets | Article 10.3.4.1.]]
</li></ol>
</li></ol>

====10.1.4.3. {{hilite | Tall Parapets || 2024-January-31 }}====

<ol>
<ol>
<li>When a {{strike| ''roof system'' transitions to a ''wall'' greater than 609.6 mm (24") in height (a "High Wall"), and the ''wall'' || 2023-January-26 }} {{hilite | ''parapet'' higher than 609.6 mm (24") (a ''tall parapet'') || 2024-January-31 }} is specified as part of the ''Contractor’s'' scope of work, 
<ol>
<li>membranes {{strike| or water-resistive barrier materials || 2023-January-26 }} specified for {{strike| ''walls'' || 2023-January-26 }} {{hilite | the vertical surface of the ''wall'', above the primary roof membrane flashing, must conform to the requirements in || 2024-January-31 }} [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]] {{strike| must be compatible with the roof membrane || 2023-January-26 }}, and
<li>additional mechanical securement shall conform to the requirements in this Part, or to the requirements of the ''manufacturer'', whichever is greater.
</li></ol>
<li>All roof intersections with ''walls'' shall conform to the requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], and shall maintain ''continuity'' with the wall ''control layers'' for air, vapour, and water.
<li>{{strike| ''Walls''|| 2023-January-26 }} {{hilite | ''Tall parapets'' with cavities must be designed with consideration for ventilation.|| 2024-January-31 }}
</li></ol>
</li></ol>

===={{hilite | 10.1.4.4. Fire Separations || 2023-October-28 }}====
{{hilite | (For reference, see Construction Detail || 2023-October-28 }} [[SBS_Fire_Separation_Joint | "SBS | Fire Separation Joint"]] and [[SBS_Fire_Separation_Wall | "SBS | Fire Separation Wall"]])

<ol>
<li>{{hilite | Fire separation walls and joints || 2023-October-28 }}
<ol>
<li>{{hilite | must be designed to conform to the “British Columbia Fire Code” and “British Columbia Building Code”, || 2023-October-28 }}
<li>{{hilite | shall incorporate non-combustible insulation where condensation control is desirable, and || 2023-October-28 }}
<li>{{hilite | shall specify the methods by which roofing materials will be affixed to the firewall (this includes the securement of linear metal flashings). || 2023-October-28 }}
</li></ol>
</li></ol>

====10.1.4.5. Doors, Windows, and Wall Openings====

<ol>
<li><span class="principles">{{hilite | Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), should be oversized to allow for the build-up of ''roof system'' flashing membrane || 2023-June-16 }}</span>.
<li>Low-clearance openings (rough openings less than 203.2 mm (8") in height, measured from the ''finished roof system surface'')
<ol>
<li><span class="principles">{{hilite | should be avoided, particularly when designing a roof to support any type of ''overburden'' (i.e., a ''vegetated roof system'') || 2025-October-25 }}</span>, and
<li><span class="recommended">are not recommended because of their propensity to leak</span> {{hilite | (a leak through a low opening is not covered by a '''''RoofStar Guarantee''''') || 2025-October-25 }}.
</li></ol>
<li>{{hilite | When a low-clearance opening is unavoidable or specified (i.e., to comply with Code for level access and egress) || 2025-October-25 }}, 
<ol>
<li>the roof must be sloped away from the opening, 
<li>the rough opening shall not be less than 101.6 mm (4") above the ''drainage plane'' and must be waterproofed in keeping with the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]], 
<li>the ''drainage plane'' must be free of obstructions and materials capable of displacing water, 
<li><span class="recommended">the low-clearance opening should be protected by an overhang wherever practical, to minimize water intrusion that occurs from wind-driven rain or from snow accumulation</span>, and
<li>the opening must be protected by an ''overflow drain'',
<ol>
<li>situated on the same roof area as the low-clearance opening,
<li>located at least 25.4 mm (1") below the elevation of the rough opening, and 
<li>conforming 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>
<li>When the building interior transitions to {{hilite | an accessible || 2025-October-25 }} {{strike| a patio or occupied || 2024-October-28 }} roof surface through a flush door opening,
<ol>
<li>the design shall conform to the requirements in this Part, and to [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]], and
<li>{{hilite | the membrane installed over the rough opening sill must be protected from abrasion damage as described in || 2025-October-25 }} [[#10.3.4.5. Doors, Windows, and Wall Openings | {{hilite | Sentence 10.3.4.5.(6) || 2025-October-25 }}]] {{hilite | below || 2025-October-25 }}.
</li></ol>
</li></ol>

===10.1.5. Reserved===
==={{hilite | 10.1.6. Expansion and Control Joints|| 2024-October-20 }}===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.6.1. Expansion Joints====
(See [[Notes to Hot Rubber Standard#A-10.1.6.1.| Note A-10.1.6.1.]]) {{strike| (See also [[#2.1.6.1. Expansion Joints | Article 2.1.6.1.]], and the application requirements in [[#10.3.6.1. Expansion Joints | Article 10.3.6.1.]]) || 2023-October-26 }}

<ol>
<li>The design and placement of structural ''expansion joints'' is the responsibility of the ''Design Authority'', but they must be considered wherever
<ol>
<li>expansion or contraction joints are provided in the structural assembly,
<li>differential movement between structural components may occur (i.e., where a wall and the deck are separately supported, or
<li>seismic movement is anticipated.
</li></ol>
<li>The location of ''expansion joints'' must be clearly indicated on the drawings, drawn in detail, and included in the specifications.
<li>{{hilite | ''Expansion joints'' must be designed as a divided, raised structure, to achieve a minimum height of 203.2 mm (8"), measured from the ''finished roof system surface''|| 2023-June-16 }}.
<li>{{hilite | The ''expansion joint'' assembly, which permits movement between the two sides of the ''expansion joint'' structure,|| 2024-June-15 }}
<ol>
<li>{{hilite | shall be the work of others unless specified as part of the ''Contractor's'' scope of work || 2024-June-15 }} (Ref. Construction Detail [[SBS Expansion Joint (Field) | "Expansion Joint (Field)"]]),
<li>{{hilite | shall be located at the high point of the ''drainage plane'' (the direction of drainage must be away from an ''expansion joint''), {{strike| and || 2023-October-26 }} || 2024-June-15 }}
<li>{{hilite | shall not be used as a pathway for drainage, either through or over the ''expansion joint'' assembly, || 2024-June-15 }}
<li>must be designed as a raised divider that incorporates a sloped top surface,
<li>may utilize an elastomeric expansion system (see {{strike| [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] and || 2023-October-26 }} [[#10.3.6.1. Expansion Joints | Article 10.3.6.1.]]), and 
<li>must have a designed height no less than 203.2 mm (8") when measured from the ''finished roof system surface''.
</li></ol>
<li>The minimum height of an ''expansion joint'' may be reduced to 127 mm (5") if the primary roof membrane flashing is {{strike| fully supported and sealed over the top || 2023-October-26 }} {{hilite | sealed to a self-supporting purpose-made elastomeric ''expansion joint'' system || 2024-October-20 }}.
<li>Proprietary elastomeric ''expansion joint'' systems, provided by others and manufactured with an EPDM-based core and flanges that can be ''fully bonded'' to the primary membrane, are not covered by a '''''RoofStar Guarantee''''' (unless expressly accepted by the '''''Guarantor''''' and listed in [[Division_C | Division C]]) but may be incorporated as part of the roof system provided the elastomeric ''expansion joint'' system is
<ol>
<li>specified for installation on a divided, raised structure,
<li>specified for installation at least 203.2 mm (8") above the ''finished roof system surface'',
<li>compatible with the roof membrane and acceptable to the ''manufacturer'',
<li>designed and manufactured to accommodate building movements of at least 500% elongation at -40°C (-40°F) across its length and at all vulcanized points,
<li>factory-fabricated by means of vulcanization,
<li>manufactured as one piece, complete with all joints, details, and connections, and
<li>completely protected from damage with sloped ''linear metal flashing''.
</li></ol>
</li></ol>

====10.1.6.2. Control Joints (Roof Dividers)====
(See [[Notes to Hot Rubber Standard#A-10.1.6.2. | Note A-10.1.6.2.]]; also see [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]])

<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>
{{strike| <li><span class="principles">The use of ''control joints'' (roof dividers) should be evaluated using the criteria in [[#10.1.6.2. Control Joints (Roof Dividers) | Article 10.1.6.2.]]</span> || 2024-October-26 }}''
<li>The ''Design Authority'' must consider specifying control joints''
<ol>
<li>when a single roof area exceed 61 m (approx. 200’) in length and the membrane is limited in its flexibility (consult the manufacturer for their recommendations),
<li>for buildings in climate zones with significant seasonal temperature swings,
<li>where an addition joins an existing building,
<li>where the deck type changes (i.e., steel transitions to wood),
<li>where insulation in the ''roof system'' changes thickness,
<li>where the ''roof deck'' changes in elevation, and
<li>when interior heating conditions change.
</li></ol>
<li><span class="principles">Specified and detailed ''control joints'' should be located at the high points of the roof, so that water drains away from both sides of the divider and is not impeded by it</span>.
<li>''Control joints'' must be
<ol>
<li>constructed as a raised divider,
<li>sloped on the top face,
<li>{{hilite | fabricated with a minimum height of 203.2 mm (8"), measured from the ''finished roof system surface'', but this may be reduced to a height of 101.6 mm (4”) if the ''control joint'' is fully enveloped in no fewer than two plies of sheet membrane flashing, or to 127 mm (5”) if capped with linear metal flashing (Ref. || 2023-October-28 }} [[#12.1.3.4. Curbs, Sleepers, and Equipment Pads | Article 12.1.3.4.]] {{hilite | concerning sleepers) || 2023-October-28 }}, and 
<li>waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>
{{strike| <li>New and existing ''control joints'' may be no less than 127 mm (5"), provided the ''control joint'' is fully enveloped in sheet membrane flashing. || 2022-October-28 }}
<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===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.7.1. Intersections with Water-shedding Roofs====

<ol>
<li>Intersections with water-shedding roofs must be designed according to the requirements in [[#10.3.7.2. Intersections with Water-Shedding Roofs | 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>

===10.1.8. Alternative Approaches for Membrane Flashing===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.8.1. Specifying Hazard-reduction Strategies====

<ol>
<li><span class="principles">The ''Design Authority'' should consider alternatives to heat-applied materials when the application process involves Hot Work</span> (Ref. [[#1.1.3.5. Hot Works | Article 1.1.3.5.]]) <span class="principles">and the substrate to which they will be applied is combustible, or when nearby structures, openings, or materials, present a fire hazard; in the alternative, choose a suitable separation or overlay material as protection from open flame</span>.
<li>Self-adhering or adhesive-applied membranes as alternatives to heat-applied membranes are acceptable to the '''''Guarantor''''' and must also be acceptable to the ''manufacturer''.
<li>The application of materials to a combustible surface, using a torch, is strictly prohibited (Refer to [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]], for application requirements).
</li></ol>

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

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membranes====

<ol>
<li>Sheet membranes used {{strike| to flash parapets, curbs, walls, or joints || 2023-January-26 }} {{hilite | to flash the intersection of the roof field and perimeter walls || 2024-January-31 }} must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
<li>{{strike| Sheet membranes used to waterproof || 2023-January-26 }} When waterproofing the vertical plane of a {{strike| "High Wall" || 2023-January-26 }} {{hilite | ''tall parapet'' above the primary membrane ''roof system'' is specified as part of the ''Contractor's'' scope of work|| 2024-January-31 }}  (Ref. [[#10.1.4.3. Tall Parapets | Article 10.1.4.3.]] and [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]), {{hilite | the membrane used on the vertical plane of the ''parapet'' shall || 2024-January-31 }}
<ol>
<li>{{strike| must || 2023-January-26 }} be compatible with the primary membrane,
<li>{{strike| must || 2023-January-26 }} be self-adhering,
<li>{{strike| shall || 2023-January-26 }} be declared suitable {{hilite | for the application || 2024-January-31 }} by the ''manufacturer'' {{hilite | (see || 2024-January-31 }} [[Notes to Hot Rubber Standard#A-10.2.1.1.(2)(3) | Note A-10.2.1.1.(2)(3)]]),
<li>{{strike| shall || 2023-January-26 }} possess properties consistent with the design and characteristics of the ''wall'' assembly,
<li>{{strike| must || 2023-January-26 }} possess a high softening point and a minimum flow temperature of 87.7°C (190°F) (ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material") and
<li>{{strike| shall|| 2023-January-26 }} have a thickness no less than 1 mm (.040”).
</li></ol>
<li><span class="principles">Some membranes may be susceptible to damage from bird droppings, pet urine, and chemical contamination (oils, solvents, or any discharge from a mechanical unit), and therefore they should be protected using measures designed in consultation with the ''manufacturer''</span>.
<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
</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>Where fasteners are used in the roof system
<ol>
<li>to secure waterproofing materials, they shall conform to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]]
<li>to secure ''linear metal flashings'', they shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>
</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>

===10.3.2. 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)) shall be
<ol>
<li>prepared in like manner to the ''roof deck'' (Ref. [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]]) and declared suitable by the ''manufacturer'', or
<li>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>
<li>Wherever the primary membrane will be applied, gaps or cracks that exceed 1.59 mm (1/16”) in width must be reinforced prior to the application of the membrane using the manufacturer’s proprietary reinforcement material.
<li>When proprietary reinforcement material is not available to repair gaps and cracks, they may be reinforced using a self-adhered or torch-applied SBS-modified bituminous base membrane
<ol>
<li>conforming to the requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]], and
<li>installed according to the requirements published in the "Standard for SBS-modified Bitumen Membrane Systems".
</li></ol>
</li></ol>

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

<ol>
<li>Hot fluid-applied rubberized asphalt used for membrane flashing shall be prepared following the requirements in [[#9.3.2.2. Preparation of Roofing Materials | Article 9.3.2.2.]]
<li>SBS-modified bitumen membrane flashing shall be prepared following the requirements in the "Standard for SBS-modified Bitumen Membrane Systems".
</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 with a material 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>Membrane flashing shall be carried up vertical surfaces at least 203.2 mm (8") above the ''finished roof system surface'' but shall be carried vertically at least 304.8 mm (12") when air, vapour, or water control systems in ''wall assemblies'' are present or specified, to permit sufficient positive ''continuity''.
<li>When SBS-modified bitumen sheet membrane flashing is used, installation shall conform to [[SBS_Roof_Systems_Standard#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", and to the ''manufacturer's'' published instructions.
<li>Low-clearance openings in walls (rough openings less than 203.2 mm (8") in height, measured from the ''finished roof system surface'') are permissible provided they conform to the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]]
<li>Where a roof allows water to freely drain off the edge, and the roof adjoins a ''wall'', a cricket or diverter should be installed at the roof edge to prevent water intrusion behind ''wall'' finishes.
<li>EIFS walls that must be cut to permit membrane replacement work must be restored with back-wrapped mesh, a base coat, and a finish coat, or with another method that is equal or superior.
</li></ol>

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

<ol>
<li>All installed membranes must be protected from splashed or dripped primer (applicable to all trades).
<li>Membrane flashing must be protected from damage caused by UV radiation, foot traffic, or shifting coverings, using a ''linear metal flashing'' (i.e., base flashing) or other methods acceptable to the '''''Guarantor'''''.
<li>Protection materials shall be installed as required in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>When an integrity scan is not required because the conditions in [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] have been satisfied, the ''Contractor'' shall nevertheless protect installed field membranes and membrane flashing, immediately after installation, with RoofStar-accepted membrane protection materials.
</li></ol>

===10.3.3. Additional Requirements for Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.3.1. Torch-applied Membranes====

<ol>
<li>The application of an open flame to combustible surfaces is not permitted.
<li>All combustible surfaces, including (without limitation) decks, ''walls'', blocking, or canted edges, must be protected from open flame by an acceptable separation or overlay material. 
<li>When the base membrane flashing is torch-applied, all overlay board joints and wall transitions must be sealed with the primary membrane manufacturer’s approved self-adhered membrane or tapes, or follow the methodologies in the "Standard for SBS-modified Bitumen Membrane Roof Systems".
</li></ol>

====10.3.3.2. Self-adhered and Cold Processed Membranes====

<ol>
<li>Self-adhered membranes must be installed on a clean, uncontaminated surface.
<li>All self-adhered and cold processed sheet membrane flashing that terminates on the vertical plane must be mechanically secured.
<li>When self-adhered or cold-processed base sheet membrane flashing overlaps granule-surfaced cap sheet membrane flashing, the overlap shall be no less than 76.2 mm (3"), granules on the cap sheet membrane must be embedded to expose bitumen, and the overlap must be continuously sealed to comply with the requirements in [[SBS_Roof_Systems_Standard#9.3.3.1. Self-adhered and Cold-processed Membranes | Article 9.3.3.1.]] in the "Standard for SBS-modified Bitumen Membrane Roof Systems".
</li></ol>

====10.3.3.3. Reserved====

====10.3.3.4. Liquid Membrane Flashing====

<ol>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) 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>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>for sheet membrane reinforcement (i.e., at corners),
<li>where abrasion resistance is desirable,
<li>where resistance to sheet membrane contamination is necessary, or
<li>where the ''Design Authority'' specifies its application.
</ol></li>
<li>must be compatible with the primary sheet membrane flashing.
</ol></li>
<li>For all applications,
<ol>
<li>the substrate must be clean, dry, free of contaminants, and primed, as directed by the flashing system manufacturer,
<li>a base layer of catalyzed liquid membrane resin must be applied within the area masked for coverage,
<li>the base coating must be reinforced with the manufacturer’s fleece, cut to size so that the fleece is set in from the masked area no more than 3.78 mm (1/8”),
<li>the fleece must be fully saturated with liquid, following the published instructions from the ''manufacturer'', and
<li>the embedded fleece must be coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
<li>On vertical sheet membrane terminations, the liquid membrane flashing system shall provide no less than 50.8 mm (2") coverage, both above and below the sheet membrane termination.
<li>Application rates and guidelines issued by the manufacturer of the liquid flashing product must be followed, unless superseded by these requirements (Ref. Figure 12.3.2.-A).
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) liquid membrane flashing system serves as a substitute for sheet membrane flashing, the reinforced liquid membrane flashing system must extend at least 203.2 mm (8”) up the vertical plane, and no less than 203.2 mm (8") onto the horizontal field plane.
<li>When a granule surface or textured finish is specified, the granules or texturing material must be broadcast into a third coat.
</ol></li>

===10.3.4. Perimeter Details, High 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. Parapets====

<ol>
<li>All parapets, regardless of their height, must be sealed with waterproofing membrane
<ol>
<li>applied to the roof-side face of the parapet, extending from the roof field to a point at least 203.2 mm (8”) above the ''finished roof system surface'', and
<li>applied to the sloped top and exterior faces.
</li></ol>
<li>When sheet membrane flashing is used to satisfy the requirements in Sentence (1),
<ol>
<li>no fewer than two plies shall be used to waterproof the bottom 203.2 mm (8") of a ''parapet wall'', immediately above the ''finished roof system surface'', and
<li>no fewer than two plies shall be used to completely seal the entire roof-side and top faces of a ''parapet wall'' that measures 609.6 mm (24") or less in height (the second, or cap sheet ply, may be carried up onto the top face of the ''parapet'', but this is subject to the ''manufacturer's'' requirements), {{strike| and
<li>at least one ply of base sheet membrane flashing shall be used to waterproof the top and exterior face of a ''parapet wall'' and overlap any joint, including a joint between the coping and a ''parapet wall'', by at least 50.8 mm (2”). || 2023-January-26 }}
</li></ol>
<li>{{hilite | Membrane applied to ''parapet'' walls must be ''fully bonded'' to the entire surface of the ''parapet'' (Ref. || 2024-January-31 }} [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.(4)]]).
<li>{{hilite | Coping that is part of the ''roof system'' must be continuously waterproofed as part of the ''roof system'', even if the coping is flashed separately from the ''parapet wall''. || 2024-January-31 }}
<li>{{hilite | All membrane bonded to a ''parapet'' coping shall continue over the top and extend down the outside face of the coping, overlapping any joint at least 50.8 mm (2”). || 2024-January-31 }}
<li>''Parapets'' shall be waterproofed to conform to the requirements in [[SBS_Roof_Systems_Standard#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems".
<li>{{strike| ''Tall parapets'' || 2022-October-28 }} {{hilite | A ''tall parapet'' (taller than 609.6 mm (24”)) || 2023-October-28 }}{{hilite | shall be waterproofed || 2023-October-28 }} in keeping with the requirements in Article [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]).
<li>Where a ''parapet'' intersects with a higher wall, water must be directed to the outer surface of the ''wall'' by flashing the union with
<ol>
<li>an acceptable SBS-modified bituminous sheet membrane flashing,
<li>membrane gussets at the corners, and
<li>a metal saddle assembly.
</li></ol>
<li>{{hilite | When a ''parapet'' is capped with a pre-cast concrete or stone coping, || 2024-June-21 }}
<ol>
<li>{{hilite | the membrane over the top of the ''parapet'' must be drilled by others to receive dowels, || 2024-June-15 }} 
<li>{{hilite | the dowels must be installed by others, and || 2024-June-15 }} 
<li>{{hilite | the dowels must be sealed by the ''Contractor'', following the requirements in || 2024-June-15 }} [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]{{hilite | , Sentences 6 and 7, for sealing dowels installed in pre-curbs. || 2024-June-15 }}
</li></ol>
</li></ol>

====10.3.4.2. Low Profile Edges====

<ol>
<li>Metal edge flashings must be 
<ol>
<li>supported over a solid substrate,
<li>installed after application of an accepted bituminous membrane, which must wrap onto the outside face of the roof edge and extend downward to overlap any cold joint by at least 50.8 mm (2”),
<li>embedded in a membrane-compatible mastic or sealant,
<li>fastened to the roof structure with mechanical fasteners spaced 203.2 mm (8”) O.C. in offsetting rows (Ref. [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]),
<li>joined to each other with lap joints measuring at least 101.6 mm (4”), each joint sealed with butyl or gunnable sealant,
<li>cleaned and prepared to receive membrane,
<li>primed with the ''manufacturer's'' accepted primer, unless specified otherwise by the ''manufacturer'',
<li>sealed beneath the primary membrane, which must extend at least 101.6 mm (4") onto the metal flashing, and
<li>finished with an accepted protection layer that is ''fully bonded'' with the primary membrane.
</li></ol>
<li>Existing canted edges must be 
<ol>
<li>made of wood, and
<li>flashed with sheet membrane in keeping with the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>
</li></ol>

====10.3.4.3. {{hilite | Tall Parapets || 2024-January-31 }}====

<ol>
<li>{{strike| Roofing || 2023-January-26 }} Sheet membranes installed on a {{strike| "High Wall" || 2023-January-26 }} {{hilite | ''tall parapet'' above the termination of primary roof membrane flashing || 2024-January-31 }}
{{strike| Where a self-adhered bituminous sheet membrane is specified for a "High Wall" that in included in the ''Contractor's'' scope of work (Ref. [[#10.1.4.3. High Walls | Article 10.1.4.3.]]), the membrane || 2023-January-26 }}
<ol>
<li>shall conform to the material requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]],
<li>must be applied with the methodology prescribed by the ''manufacturer'',
<li>shall positively overlap the primary sheet membrane flashing by at least 50.8 mm (2”),
<li>shall underlap the roof sheet membrane flashing installed to cover the top of a parapet by at least 50.8 mm (2"),
<li>{{hilite | may be used to waterproof the coping of a ''tall parapet'' || 2024-January-31 }} {{strike| shall not be used to cover the top surface of a ''parapet'' || 2023-January-26 }}, and
<li>shall be protected from UV radiation with a metal flashing, cladding or another wall covering.
</li></ol>
<li>{{hilite | The application of sheet membrane over the coping of a ''tall parapet'' shall conform to the ''manufacturer’s'' prescribed methodologies but may be installed parallel to the long axis of the ''parapet'' as permitted in || 2024-January-31 }} [[#10.3.4.1. Parapets | Article 10.3.4.1.(2)]] {{hilite | for a ''standard parapet'' ("Standard for SBS-modified Bitumen Membrane Roof Systems"), provided the conditions therein are satisfied. || 2024-January-31 }}
</li></ol>

===={{hilite | 10.3.4.4. Fire Separations || 2023-October-28 }}====
{{hilite | (For reference, see Construction Detail || 2023-October-28 }} [[SBS_Fire_Separation_Joint | "SBS | Fire Separation Joint"]] and [[SBS_Fire_Separation_Wall | "SBS | Fire Separation Wall"]])

<ol>
<li>{{hilite | Fire separation walls and joints || 2023-October-28 }}
<ol>
<li>{{hilite | shall conform to the specified design, || 2023-October-28 }}
<li>{{hilite | shall be waterproofed in keeping with the requirements in this Part, || 2023-October-28 }}
<li>{{hilite | shall not incorporate combustible materials over the top of the joint or wall, || 2023-October-28 }}
<li>{{hilite | shall be offset from metal cap flashing joints (in the alternative, soldered standing seams or a water channel clip may be used when joints align; see Construction Detail || 2023-October-28 }} [[SBS_Fire_Separation_Wall | "SBS | Fire Separation Wall"]]),
<li>{{hilite | shall exclusively utilize s-locks and concealed continuous clips for securing linear metal flashing to a firewall face, and || 2023-October-28 }}
<li>{{hilite | shall utilize only standing seam joints for linear metal cap flashings. || 2023-October-28 }}
</li></ol>
</li></ol>

====10.3.4.5. Doors, Windows, and Wall Openings====

<ol>
<li>Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), must be waterproofed before the door, window, curtain-wall, or another assembly is installed.
<li>All rough openings must be suitable for the application of sheet membrane flashing or reinforced liquid membrane flashing systems, and any work to render surfaces suitable shall be performed by others.
<li>Low-clearance openings (rough openings less than 203.2 mm in height, measured from the ''finished roof system surface'') must be flashed using methods described in this Article; curtain-wall openings may be flashed using a modified ''metal water-stop flashing'' method by eliminating the water-stop flashing, provided the remaining required work is executed by the ''Contractor''.
<li>Membranes used for this application must conform to the material requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1., "Flashing Membranes"]].
<li>In all methods described in this Article, low-clearance openings must be pre-flashed with no less than one ply of base sheet membrane
<ol>
<li>lapped over the field membrane in keeping with requirements found elsewhere in this Part,
<li>carried over the top face of the rough opening, and
<li>carried vertically above the sill, at least 101.6 mm (4").
</li></ol>
<li>{{hilite | Regardless of the method described below, the membrane installed over the rough opening sill must be protected from abrasion damage with || 2025-October-25 }}
<ol>
<li>{{hilite | a full-coverage pre-manufactured threshold step (by others) || 2025-October-25 }},
<li>{{hilite | a full-coverage metal flashing, supplied and installed by the ''Contractor'', or || 2025-October-25 }}
<li>{{hilite | fleece-reinforced PMMA, coated with an abrasion-resistant coating proprietary to the PMMA ''manufacturer'' || 2025-October-25 }}.
</li></ol>
<li>When the '''metal water-stop flashing''' method is specified,
<ol>
<li>all corners must be reinforced with compatible membrane gussets, and.
<li>the metal water-stop flashing must be
<ol>
<li>fabricated to fit the full width of the opening,
<li>fashioned with a water dam upstand measuring at least 25.4 mm (1”) in height,
<li>installed over the sill membrane,
<li>embedded in a membrane-compatible mastic or sealant,
<li>mechanically attached to the sill, and
<li>sealed to the rough opening with an additional ply or coating of membrane flashing.
</li></ol>
</li></ol>
<li>When the '''metal sill-pan flashing method''' is specified, a single-piece metal pan sill flashing must be
<ol>
<li>fabricated to fit snugly inside the rough opening,
<li>folded, welded, or soldered in the corners,
<li>fashioned with a water dam upstand measuring at least 25.4 mm (1”) in height,
<li>fabricated with 101.6 mm (4”) high flanges that cover the insides of the rough opening and wrap around the outside face of the wall at least 101.6 mm (4”),
<li>installed over the pre-flashing membrane and embedded in a membrane-compatible mastic or sealant,
<li>mechanically attached to both the outside and inside faces of the rough door opening, and
<li>sealed to the rough opening with an additional ply or coating of membrane flashing.
</li></ol>
<li>When clearances preclude the use of either the ''metal water-stop flashing'' method or the ''metal sill-pan flashing'' method, the rough opening may be flashed using the ''reinforced liquid membrane flashing''.
<li>When a '''reinforced liquid membrane flashing method''' is specified,
<ol>
<li>the rough opening must be flashed using the metal water-stop method,
<li>the metal water-stop flashing must be sealed to the pre-flashing base membrane using an accepted liquid membrane flashing system,
<li>the inside faces of the rough opening must be flashed with reinforced liquid membrane flashing, ensuring an overlap with the membrane on the sill at least 50.8 mm (2”),
<li>liquid membrane flashing must extend up the inside faces of the rough opening at least 101.6 mm (4”), and
<li>the liquid membrane flashing system must be applied following the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
</li></ol>
<li>''Overflow drains'' must
<ol>
<li>be installed on the roof area adjacent any rough low-clearance opening,
<li>be located at least 25.4 mm (1") below a rough low-clearance opening, and
<li>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>

===10.3.5. Reserved===
===10.3.6. Expansion and Control Joints===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.6.1. Expansion Joints====

<ol>
<li>''Expansion joints'', which are {{hilite | framed and sheathed || 2024-October-20 }} {{strike| constructed || 2023-October-26 }} by others, must be
<ol>
<li>sloped toward the roof surface on the top face of each side,
<li>waterproofed as shown in Construction Detail [[SBS Expansion Joint (Field) | "Expansion Joint (Field)"]], with methods and materials conforming to the requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]], and with the ''manufacturer’s'' published specifications for the detail, and
{{strike| <li>covered with a membrane underlay, and || 2023-October-26 }}
<li>covered with 2-part ''linear metal flashings'' (counter-flashing and cap flashing) that permit multi-directional movement in the joint.
</li></ol>
{{strike| <li>{{hilite | The supply and installation of the ''expansion joint'' assembly or system is the responsibility of others, unless specified otherwise. || 2023-June-16 }} || 2023-October-26 }}
<li>When proprietary elastomeric ''expansion joint'' systems are specified, the bond between the sheet membrane flashing and the ''expansion joint'' system must be acceptable to both the ''manufacturer'' and the supplier of the ''expansion joint'' system (Ref. [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] for design requirements).
<li>Field splicing of proprietary elastomeric ''expansion joints'' is permissible only when made with a machine acceptable to the ''expansion joint'' manufacturer.
</li></ol>

====10.3.6.2. Control Joints (Roof Dividers)====

<ol>
<li>''Control joints'' must be waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>

===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 Water-Shedding Roofs====
(See [[Notes to Hot Rubber Standard#A-10.3.7.2. | {{hilite | Note A-10.3.7.2. || 2025-October-25 }}]])

<ol>
<li>When a ''waterproofing roof system'' transitions <u>down a slope</u> onto a lower ''water-shedding roof system'', the waterproofing membrane must lap over the ''water-shedding roof system'' by no less than 50.8 mm (2").
<li>When a ''waterproofing roof system'' transitions <u>up a slope</u> and underlaps a ''water-shedding roof system'', 
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope <u>at least</u>
<ol>
<li>152.4 mm (6”), plus {{hilite | at least || 2025-October-25 }} 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically <u>from the maximum water level</u>,
{{strike| <li>203.2 mm (8”), plus 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically <u>from the ''drainage plane''</u>, || 2024-October-29 }} and
<li>304.8 mm (12”) plus {{hilite | at least || 2025-October-25 }} 76.2 mm (3”) for the overlap by the ''water-shedding roof system'', when measured vertically <u>from the {{strike| ''drainage plane'' or || 2024-October-29 }} maximum water level, in regions with typical heavy snow</u>,
</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'', and
<li>the overlapping of adjoining ''roof system'' materials must conform to the requirements for the specific ''water-shedding roof system''.
</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. Alternative Approaches to Sheet Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.8.1. General====

<ol>
<li>When field membranes or flashing plies are heat-welded, or when construction sequencing requires strategies for mitigating fire risk, the ''Contractor'' is responsible to assess risks and should consider the means and methods in [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems".
</li></ol>

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=
<div id="DRAIN_DESIGN"></div>
==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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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,</span>
<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.</span>
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary roof drain''
<ol>
<li>that serves as a safeguard when roof drains fail, and  
<li>which may be located in the roof field (for example, as a secondary drain) or at the perimeter of the roof.
</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>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>

===={{hilite | 11.1.2.2. Reserved || 2025-October-25 }}====

===={{hilite | 11.1.2.3. RoofStar Vegetated Roof Guarantee || 2025-October-25 }}====

<ol>
<li>To qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the supporting ''roof assembly'' shall 
<ol>
<li>comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''', '''''RoofStar 10-year Guarantee''''', or a '''''RoofStar 15-year Guarantee''''',
<li>be acceptable to the manufacturer as support for a ''vegetated roof system'', and
<li>comply with the related requirements in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”].
</li></ol>
</li></ol>

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

<ol>
<li>The ''Design Authority'' is responsible for the design of roof drainage {{hilite | and ''continuity'' of ''control layers'', where these intersect with any part of the designed roof drainage system (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; {{hilite | also see || 2024-June-15 }} [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
<li>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 [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], which lists rainfall loads using specific reference locations throughout the province.
<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><span class="recommended">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</span> (listed without limitation)</span>
<ol>
<li><span class="recommended">roof slope (more slope theoretically increases drainage and lessens live loading from rainfall)</span> (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li><span class="recommended">rainfall rates for primary and overflow drainage</span>,
<li><span class="recommended">''primary'' and ''overflow drain'' capacities</span>,
<li><span class="recommended">hydraulic head (pressure)</span>, and
<li><span class="recommended">{{hilite | the location of the ''drainage plane''|| 2021-October-30 }}</span> {{hilite | (the ''drainage plane'' is not necessarily the same as the|| 2021-October-30 }} ''finished roof 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 or be collected by means of an external or built-in gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]) and drained onto a lower ''roof assembly''.
<li>The membrane of the lower roof onto which drain water is directed must be protected from abrasion with splash pads.</span>
<li><span class="principles">Roof drains should be situated in a depression, to compensate for the build-up of membrane at the edge of the drain ''assembly'', which may impede drainage.</span>
<li>All drains located at the level of the field membrane must be fully blocked above the ''supporting deck structure''.
<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><span class="principles">If a flow {{hilite | control || 2025-October-25 }} {{strike| restrictor || 2024-October-29 }} is present in an existing cast drain leader, the {{hilite | flow control || 2025-October-25 }} {{strike| restrictor || 2024-October-29 }} should be reinstalled</span>.
<li>Roofs that support ''overburden'', and roofs that are secured with ballast, must be designed to incorporate a ballast guard that surrounds the drain and promotes proper drainage.
<li>{{hilite | Roofs designed to support a ''vegetated roof system'' covered by a '''''RoofStar Vegetated Roof Guarantee''''' must design the drainage system, including ''roof drain'' protection measures, in coordination with the “RGC Standard for Vegetated Roofs” (Note that if an existing roof incorporates flow control drains , reinstating them as part of a roof replacement ''project'' may adversely affect the viability a ''vegetated roof system'', thereby necessitating a wider redesign of roof drainage.)(See [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.2._Permitted_Vegetated_Roof_Systems Sentence  1.1.3.2.(9)], “RGC Standard for Vegetated Roofs”; also see || 2025-October-25 }} [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]).  
</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 {{hilite | 457.2 mm (18") || 2024-June-15 }} {{strike| 304.8 mm (12”) || 2023-June-15 }} 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>{{hilite | Notwithstanding the requirements in Sentence (1), a cast iron ''roof drain'' with a sump receiver must be placed well away from any interference with drain securement. || 2024-June-15 }}
<li>When {{hilite | a roof is replaced and || 2024-June-15 }} existing ''roof drain'' {{strike| and penetration locations || 2023-June-15 }} do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit {{strike| a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]] || 2023-June-15 }}{{hilite | a drawn detail for a review by the '''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in Subsection 11.3.3 || 2024-June-15 }}:
<ol>
<li>{{hilite | Wall membrane flashings must not terminate under the clamping ring of a cast drain || 2024-June-15 }}.
<li>{{hilite | The clamping ring of a cast drain must be fully seated to ensure the drain will function properly || 2024-June-15 }}.
</ol></li>
</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><span class="principles">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''</span>.
</li></ol>

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

<ol>
<li><span class="principles">A scupper drain may serve either as a ''primary roof drain'' or as a ''secondary drain''</span>.
<li><span class="principles">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>''Overflows'' must be 
<ol>
<li>designed as open-wall scuppers for ''parapets'' measuring 152.4 mm (6”) or less in height (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]), or 
<li>designed around the principles of a through-wall scupper when ''parapets'' are higher than 152.4 mm (6”) (Ref. Construction Detail [[SBS Through-wall Scupper Drain  | "Through-wall Scupper Drain"]]), and (irrespective of design) shall be
<ol>
<li>located no higher than 101.6 mm (4”) above the ''drainage plane'',
<li>installed at least 25.4 mm (1”) lower than the lowest elevation of a door, window, or other low-clearance opening, to prevent water intrusion,
<li>situated so that they freely and visibly discharge storm water,
<li>protected with a ballast guard when the overflow is located below the ''finished roof system surface'', 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>
</li></ol>

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

<ol>
<li>A '''''RoofStar Guarantee''''' may cover a membrane ''gutter'' (''gutters'' lined with an adhered membrane and typically integrated into the roof structure) only when the membrane ''gutter'' and the adjoining roof area are part of the same scope of work.
<li>The ''Design Authority'' is responsible to design the membrane ''gutter'' for its anticipated capacity, with consideration given to
<ol>
<li>rainfall and snow load calculations for the building location,
<li> drain type, size, and flow rate, and
<li>{size and placement of the ''overflow drain''.
</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>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>

===={{hilite | 11.1.4.4. Drains in Planters || 2025-October-25 }}====

<ol>
<li>Drains designed for structural planters must conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2.] of the “RGC Standard for Vegetated Roofs”.
</ol></li>

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

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

<ol>
<li>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>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.]]).
<li>Sheet membranes used to flash (strip in) drains shall be reinforced with polyester or a composite scrim, but in any event must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
</li></ol>

====11.2.1.2. Roof Drains and Scuppers====
(See [[Notes to Hot Rubber 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><span class="principles">should separate securement of the under-deck clamp and clamping ring from securement for the strainer</span>, and
<li>must be installed by the trade supplying the roof drain.
</li></ol>
<li>{{hilite | Cast-iron planter drains must be supplied with a perforated riser that is proprietary to the drain manufacturer (See the “RGC Standard for Vegetated Roofs”,|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage{{hilite | Article 6.1.3.2|| 2025-October-25 }}]).
<li>Cast-iron ''scupper drains'' must be
<ol>
<li>supplied with a clamping strainer, and
<li>designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable).</span>
</li></ol>
<li>Lead sheet flashing, when specified for use with a cast-iron drain, 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/m<sup>2</sup> (3 lb/ft<sup>2</sup>). 
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader) must
<ol>
<li>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>be hot-welded at the joints between the bowl/flange and drain stem, and
<li>incorporate a clamping ring.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that connect with plumbing inside the building (“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”)), or
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)).
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that drain directly to the exterior of the building (“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”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</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 (1-1/2”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains'' 
<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, and 
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials | Section 13.2.]]).
</li></ol>
<li>All roof drains utilized in a ''roof assembly'' that includes gravel ballast or growing media (soil) must be supplied with the drain manufacturer's proprietary primary drain strainer and secondary stainless-steel ballast guard, but when one is not provided, a custom-fabricated guard may be used provided the guard
<ol>
<li>is fabricated from 20-gauge stainless-steel (0.9525 mm or 0.0375”),
<li>incorporates 6.35 mm (1/4”) perforations, and
<li>equals or exceeds the height of the ''finished roof system surface''.
</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>{{hilite | A reinforced liquid membrane system (PMMA or PUMA) || 2025-October-25 }} 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>

==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>

===11.3.2. 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 {{hilite | 457.2 mm (18") || 2024-June-15 }} {{strike| 304.8 mm (12”) || 2023-June-15 }} away from any adjacent drain, penetration, upstand, edge, or wall (the separation space is measured between openings, excluding the flange).
<li>The {{hilite | 457.2 mm (18") || 2024-June-15 }} {{strike| 304.8 mm (12”) || 2023-June-15 }} 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.
<li>{{hilite | When a roof supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow|| 2020-July-3 }}.
<li>{{hilite | When the ''overburden'' is a ''vegetated roof system'', ''roof drains'' must be protected by both a {{strike| gravel || 2024-October-29 }}{{hilite | stone || 2025-October-25 }}/ballast guard and a ''separation zone'', as required in|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#5.1.3.3._Separation_of_vegetation_from_roofing_details {{hilite |Article 5.1.3.3.|| 2025-October-25 }}] {{hilite |of the "RGC Standard for Vegetated Roofs"|| 2025-October-25 }} {{strike| (Ref. [[#14.1.3.8. Drainage | Article 14.1.3.8.]])|| 2024-October-29 }}.
</ol></li>

====11.3.2.4. General Installation Requirements====

<ol>
<li>{{hilite | Roof drains || 2024-June-15 }} must be 
<ol>
<li>secured to the ''supporting deck'' structure, or to blocking, {{hilite | and || 2024-June-15 }}
<li>{{hilite | properly detailed for ''continuity'' with specified ''control layers'' || 2024-June-15 }}.
</ol></li>
<li>When a roof supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow.
<li>Drains must be flashed using the primary membrane system or accessories acceptable to the ''manufacturer'' and the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) 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><span class="principles">Drain extensions for cast-iron roof drains should be avoided</span>.
<li><span class="principles">Existing flow {{hilite | control {{strike| restrictors || 2024-October-29 }} || 2025-October-25 }} removed during roof construction should be reinstalled</span>; {{hilite | however, if the replacement roof will support a ''vegetated roof system'', the drainage design must conform to the requirements set out by the '' Design Authority'' || 2025-October-25 }}.
<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. Reserved====

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

<ol>
<li>The drain flange must be clean and dry.
<li>When priming is required by the ''manufacturer'', the drain flange must be primed with the ''manufacturer’s'' accepted primer.
<li>The field membrane ''system'' must be installed according to the requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]]
<li>In addition to the ''manufacturer’s'' specific requirements for roof drains,
<ol>
<li>the clamping ring must be seated and secured, ensuring it is not broken, and
<li>the drain screen must be securely installed.
</li></ol>
</li></ol>

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

<ol>
<li><span class="recommended">Retrofitting a cast-iron roof drain is not recommended</span>, but when retrofitting is unavoidable (i.e., the drain has deteriorated to the extent that it cannot receive a new roof membrane, and removal is not possible),
<ol>
<li>remove any broken parts and debris,
<li>connect the retrofit insert to internal leaders using only an external coupling (unless impractical - see alternative requirements below), and
<li>follow the requirements set out in [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]
</li></ol>
<li>When an internal compression seal is used out of necessity to connect a retrofit drain to an existing drain leader, 
<ol>
<li>the joint must be properly prepared to ensure the joined surfaces are clean, smooth, and uniform, and
<li>honing out the cast pipe may be required.
</li></ol>
<li>In the absence of a clamping collar, the retrofit insert drain must be sealed to the primary membrane with another method acceptable to the ''manufacturer'' and the '''''Guarantor''''' (Ref. [[#11.2.1.6. Liquid Membrane Flashing | Article 11.2.1.6.]])
</li></ol>
</li></ol>

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

<ol>
<li>''Flanged insert drains'' installed with SBS-modified bituminous sheet membranes must conform to the requirements in [[SBS_Roof_Systems_Standard#11.3.3.6. Flanged Insert-type Roof Drains | Article 11.3.3.6.]] of the “Standard for SBS-modified Bitumen Membrane Roof Systems”.
</li></ol>

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

<ol>
<li>''Open scupper drains'' may be constructed to match the height of the roof or membrane ''gutter'' edge, but must be fully sealed with membrane flashing (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]).
<li>When a ''through-wall scupper'' is specified, only fully enclosed scupper drains (enclosed on all sides and open only at the inflow and outflow ends) may be installed (Ref. Construction Detail [[SBS Through-wall Scupper Drain  | "Through-wall Scupper Drain"]]).
<li>''Scuppers'' and ''overflows'' that are installed through walls may be installed no closer than 203.2 mm (8") to
<ol>
<li>a roof drain, or
<li>any protrusion and its flashing.
</li></ol>
<li>''Scupper'' and ''overflow'' assemblies must be
<ol>
<li>cleaned and prepared to receive membrane flashing (refer to the membrane manufacturer’s published requirements),
<li>embedded in a layer of trowelled membrane-compatible mastic,
<li>primed on exposed flanges to receive membrane flashing,
<li>mechanically fastened to the substrate (i.e., blocking, the ''roof deck'', and the ''wall'') with fasteners conforming to [[#11.2.1.4. Fasteners | Article 11.2.1.4.]], and
<li>sealed to the ''roof system'' with base sheet membrane flashing plies that 
<ol>
<li>lap onto the drain body flanges at least 101.6 mm (4”), and 
<li>extend onto the surrounding field membrane or perimeter base membrane by at least 152.4 mm (6").
</li></ol>
</li></ol>
<li>Cap sheet membrane flashing for ''scuppers'' and ''overflows'' must extend past the terminated edges of base membrane plies and seal to the drain flange.
<li>Clamping collars must be securely installed according to their design, and where specified.
</li></ol>

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

<ol>
<li>All ''gutter'' membranes must be installed according to the ''manufacturer’s'' published instructions.
<li>Sheet membranes installed in a ''gutter'' must be 
<ol>
<li>installed perpendicular to the ''gutter'' length,
<li>carried up an adjoining ''roof system'' (measured vertically from the maximum water level) 
<ol>
<li>at least 152.4 mm (6”), or
<li>at least 304.8 mm (12”) in regions with typical heavy snow,
</ol></li>
<li>lapped under and sealed to the adjoining membranes at least 152.4 mm (6”),
<li>installed in keeping with application requirements in this Standard,
<li>mechanically secured at their terminations, both on the outside of the ''gutter'' edge and on the field, and
<li>secured above the maximum water level at least 152.4 mm (6”) and no more than 304.8 mm (12”) O.C.
</ol></li>
<li>''Gutter'' drains and overflows must be installed in keeping with the requirements in [[#Section 11.1. Design | Section 11.1., "Design"]].
<li>Drain flanges that must be bent to accommodate the width of the ''gutter'' must be mechanically fastened to the ''gutter'' wall before membrane is installed.
<li>A metal ''gutter'' liner
<ol>
<li>must incorporate soldered seams when it is fabricated from copper sheet material,
<li>must incorporate welded seams when it is fabricated from stainless steel, and
<li>must be installed
<ol>
<li>over an adhered single ply membrane, no less than 2.3 mm (90 mils) thick (bituminous membranes) or 1.5 mm (60 mils) thick (non-bituminous membranes), and
<li>with a ''separation layer'' (slip sheet) between the membrane and the metal liner to prevent damage to the membrane caused by the liner at its joints.
</ol></li>
</ol></li>
<li>The transition from a membrane ''gutter'' to a ''water-shedding system'' that is insulated (typically ASM only) shall conform to the requirements for membrane ''gutters'' in the "Standard for Architectural Sheet Metal (ASM) Roof Systems" (See Construction Detail [[ASM Membrane Gutter (Design Elements) | "Membrane Gutter (Design Elements)"]] for an illustrated example).
</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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<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>

===12.1.3. 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>Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others.
<li>Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head.
<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 (see Figure 12.3.2.1.-A); the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li><span class="recommended">Penetration flashings should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.</span>
<li>{{hilite | Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move. || 2024-January-31 }}
<li>Cylindrical ("pipe-type") penetrations must be sealed with
<ol>
<li>the ''manufacturer’s'' proprietary rubber-based friction seals that utilize mechanical clamps,
<li>a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]), or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Aluminum or copper flashings for penetrations may be located at the ''drainage plane'' in any assembly type.
</li></ol>

====12.1.3.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized flashings and vents {{strike| are permitted || 2022-October-28 }} {{hilite | may be specified for use || 2023-October-28 }} in the ''drainage plane'' on ''uninsulated systems'', provided {{hilite | they conform to the requirements and conditions in || 2023-October-28 }} [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2.]]
{{strike| <ol>
<li>the base is coated (see [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2.]]), and
<li>the penetration opening does not exceed 0.126 m<sup>2</sup> (196 in.<sup>2</sup>).
</li></ol> || 2022-October-28 }}
<li>All galvanized penetration flashings or vents specified for use in a ''protected roof system'' or ''modified protected roof system'' must be located on ''curbs'' no less than 203.2 mm (8") in height above the ''finished roof system surface''.
<li>Galvanized flashings {{hilite | with a base opening || 2023-October-28 }} {{strike| used for penetrations or openings || 2022-October-28 }} larger than 0.126 m<sup>2</sup> (196 in.<sup>2</sup>) in size must be supported by a ''curb''.
</li></ol>

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

<ol>
<li>Penetrations on new construction ''projects'' 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); the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations.
<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, Sleepers, and Equipment Pads====

<ol>
<li>The design and placement of ''curbs'' and sleepers shall be the responsibility of the ''Design Authority''.
<li>''Curbs'' must be designed so that they can be secured directly to the ''deck'' structure, or to intermediate blocking, and must not be situated on top of the ''roof system''.
<li>All ''curbs'', sleepers, and deck-supported equipment pads must be designed to achieve a minimum height of 203.2 mm (8”), measured from the ''finished roof system surface'', to permit proper membrane flashing.
<li>Notwithstanding the minimum height requirement membrane flashing, ''curbs'' and sleepers that are completely sealed (enveloped) with membrane, and are free of penetrations through the top face (i.e., equipment isolators) may be less than 203.2 mm (8”) in height but shall be
<ol>
<li>no less than 101.6 mm (4") in height, or
<li>no less than 127 mm (5") in height when capped with a ''linear metal flashing''.
</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>Equipment ("housekeeping") pads placed on top of the ''finished roof system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must conform to the requirements for structural sleepers or equipment pads.
</ol></li>
<li>Reinforced liquid membrane flashing systems may be specified only where
<ol>
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible.
</li></ol>
</li></ol>

====12.1.3.5. Protection of Roof Membranes====

<ol>
<li>The ''Design Authority'' must consider and specify mitigating strategies to preserve the membrane from damage (i.e., specifying grease guards or a reinforced 2-part liquid membrane coating) when mechanical equipment extracts and discharges grease, chemicals, or other contaminants, onto the roof.
</li></ol>

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

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed at the field membrane level and <span class="principles">should be designed for attachment to vertical surfaces only</span>.
<li><span class="principles">Attachment of railings, ladders, and other attached structures to a raised horizontal substrate is strongly discouraged</span>, but when this manner of securement is specified, the design must be submitted in writing by the ''Design Authority'' to the '''''Guarantor''''' for review and acceptance through a written Variance.
<li><span class="recommended">Ladders, railings, or other structures that may penetrate the ''roof system'', should be designed to minimize thermal bridging (and consequential condensation) or reduced thermal performance; uninsulated direct, rigid connections to the structural deck or walls is strongly discouraged.</span>
</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>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
<ol>
<li>the same membrane used on the roof field, or
<li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
</li></ol>
</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>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
<li>compatible with the ''roof system'',
<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>at least 203.2 mm (8”) tall when measured from the ''finished roof system surface'' to an opening, or to the top of the flashing.
</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>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
</li></ol>
<li>Galvanized penetration flashings, and galvanized vents, must
<ol>
<li>meet or exceed the CSA-A93 Standard,
<li>be made with material galvanized steel (26-gauge or heavier) conforming to the metal requirements found in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]], and
<li>be at least 203.2 mm (8”) tall when measured from the ''finished roof system surface'' to an opening.
</li></ol>
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>must slope downward from the penetration approximately 45°,
<li>shall be at least 50.8 mm (2”) wide,
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li><span class="principles">should be fabricated with a channel at the top edge, for retaining sealant.</span>
</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></ol>

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

<ol>
<li>All plumbing vent flashings shall be non-ferrous.
<li>Lead plumbing vent flashings are not permitted.
<li>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
<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. Reserved====

==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>

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations====

<ol>
<li>All penetration flashing materials must be new.
<li>Anything that penetrates through the {{hilite | ''roof assembly'' || 2024-June-15 }} {{strike| system || 2023-June-15 }}, including openings for ventilation, must be 
<ol>
<li>{{hilite | sealed to each ''control layer'' that it passes through or intersects, and || 2024-June-15 }}
<li>flashed with a ''curb'', a purpose-made flashing, or a custom-fitted flashing, all of which shall be sealed to the ''roof system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished roof system surface''.
</li></ol>
<li>Each roof penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing
<ol>
<li>must be suitable for the slope and penetration, and
<li>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 }}.
</li></ol>
<li>All vertical penetrations that extend beyond the upper edge of a flashing shall be sealed to the flashing (the exception to this requirement is an open pipe penetration which is flashed with a purpose-made flashing and fitted cap that directs water back into the pipe).
<li>Non-ferrous penetration flashings and vents that conform to the material requirements in [[#Section 12.2. Materials | Section 12.2.]] may be located at the ''drainage plane'' in any assembly type.
<li>{{hilite | All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''. || 2023-October-28 }}
<li>Lead penetration flashings are not permitted in a hot fluid-applied rubberized asphalt assembly.
<li>{{hilite | All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''. || 2023-October-28 }}
<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),
<li>a sheet membrane-flashed curb fitted with a customized sheet metal hood (shaped to function like a weather head), or
<li>a 2-component fleece-reinforced liquid membrane flashing as described in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] (when other methods are not possible or practicable).
</ol></li>
<li><span class="principles">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</span>; water tracking along cables and horizontal pipes does not constitute a leak and is therefore excluded from coverage under the '''''Guarantee'''''.
<li>{{hilite | Each flanged penetration flashing || 2024-June-15 }} must be installed after the first coat of membrane and shall be
<ol>
<li>primed, when required by the ''manufacturer'',
<li>embedded in the primary membrane,
<li>securely fastened to the supporting deck structure or intermediate blocking, and
<li>sealed to the base membrane coat with
<ol>
<li>its own  {{strike| {{hilite | membrane flashing (retrofit flashings only) || 2023-June-16 }} or a || 2023-June-15 }} sheet membrane target patch (the use of a single target patch for multiple penetration flashings is not permissible unless otherwise stated in this Standard), or
<li>membrane flashing (retrofit flashings only).
</ol></li>
{{strike| {{hilite | Retrofit flashings (metal flashings fitted together around a penetration and riveted or clamped together) shall be flashed with || 2023-June-16 }}
{{hilite | base sheet membrane flashing carried up the vertical face of the flashing at least 203.2 mm (8") and past the base flange at least 101.6 mm (4"), and|| 2023-June-16 }}
{{hilite | cap sheet membrane flashing which fully covers the base sheet flashing and extends past the termination of the base flashing by at least 50.2 mm (2")|| 2023-June-16 }} (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]). || 2023-June-15 }}
</ol></li>
<li>{{hilite | When penetration flashings are closer than 457.2 mm (18") to a ''roof drain'',|| 2024-June-15 }}
<ol>
<li>{{hilite | both must first be secured and seated in base coat of hot fluid-applied rubberized asphalt || 2024-June-26 }} (Ref. [[#Section 11.3. Application | Section 11.3., "Application"]], for ''roof drains''),
<li>{{hilite | the drain target patch (sheet membrane flashing) must be installed so that it bonds to the hot fluid-applied rubberized asphalt base coat, || 2024-June-26 }}
<li>{{hilite | hot fluid-applied rubberized asphalt must be applied to the drain target patch where it will be overlapped by the penetration membrane target patch, || 2024-June-26 }}
<li>{{hilite | the membrane target patch around the penetration flashing must then be installed so that it bonds to the hot fluid-applied rubberized asphalt and overlaps the target patch for the ''roof drain'' (this promotes positive drainage), and || 2024-June-26 }}
<li>{{hilite | reinforcement fabric, the final primary membrane coat(s), and membrane protection, shall then be applied to complete the installation. || 2024-June-26 }}
</ol></li>
<li>When the separation between penetration flashings is less than 304.8 mm (12") but greater than 203.2 mm (8") (Ref. [[#12.1.3.3. Separation Between Details | Article 12.1.3.3.]]), the penetrations must be
<ol>
<li>{{hilite | flashed together with a single membrane target patch that extends at least 152.4 mm (6") past the edge of the flashing flanges, || 2024-June-15 }} 
<li>{{hilite | coated with the final membrane coat, and || 2024-June-15 }} 
<li>{{hilite | additionally sealed at the base of the flashing tube with the ''manufacturer's'' compatible liquid membrane flashing system| 2024-June-15 }}
<ol>
<li>{{hilite | conforming to the application requirements in || 2024-June-15 }} [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]],
<li>{{hilite | carried up the penetration flashing at least 101.6 mm (4"), and || 2024-June-15 }}
<li>{{hilite | carried onto the field membrane at least 203.2 mm (8"). || 2024-June-15 }}
</ol></li>
</ol></li>
<li>{{hilite | When the separation between penetration flashings is less than 203.2 mm (8"), the penetrations must be waterproofed || 2024-June-15 }} 
<ol>
<li>{{hilite | with a curb, || 2024-June-15 }}
<li>{{hilite | by elevating the penetrations above the drainage plane, or || 2024-June-15 }} 
<li>{{hilite | with another method acceptable to the '''''Guarantor''''' || 2024-June-15 }} (See Note A-12.3.2.1.(13)).
</ol></li>
<li>Sheet membrane target patches applied over flanged penetration flashings {{hilite | shall be || 2024-January-31 }}
<ol>
<li>{{strike| shall be || 2023-January-26  }}{{hilite | cut from a single piece of the ''manufacturer's'' acceptable SBS-modified sheet membrane (when the penetration is large, the target patch may be cut from two pieces of membrane that must be joined with laps at least 152.4 mm (6”) in width, || 2024-June-15 }}
<li>{{strike| must be || 2023-January-26  }} {{strike| a single piece or, when the penetration is large, two pieces that must be joined with laps at least 152.4 mm (6”) in width, || 2023-June-15 }} {{hilite | sized to extend past the edge of the flashing flange onto the roof field by at least 101.6 mm (4") (for non-conforming penetration spacing, see Sentence (12) in this Article) || 2024-June-15 }},
<li>{{strike| must || 2023-January-26 }} {{hilite | aligned || 2024-January-31 }} with the base field membrane runs, or be turned 45-degrees to the base field membrane,
<li>{{strike| shall || 2023-January-26  }} {{hilite | sealed to || 2024-January-31 }} the entire flange, terminating approximately 12.7 mm (1/2") from the flashing upstand, and
{{strike| must|| 2023-January-26  }} {{strike| extend past the edge of the flange, onto the roof field, by at least 101.6 mm (4”), and || 2023-June-15 }} 
<li>{{hilite | sealed to the field membrane beyond the edge of the flashing flange, as evidenced by continuous bleed out of bitumen along all edges of the patch (Ref. || 2024-January-31 }} [[#9.3.2.6. Membrane Seams | Article 9.3.2.6.]] {{hilite | concerning seams). || 2024-January-31 }}
{{strike| <li><span class="principles">should show continuous visible bleed-out of bitumen along all edges of the patch</span>. || 2023-January-26 }}
</ol></li>
<li>Cap membrane installed over a flanged penetration flashing
<ol>
<li>shall extend past the edge of the target patch membrane and terminate at the flashing upstand, and
<li>must be sealed along the cut edge of the membrane with
<ol>
<li>{{hilite | a compatible mastic embedded with granules|| 2020-July-3 }}, or
<li>{{hilite | a reinforced 2-component liquid membrane flashing, applied in keeping with the standards found in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]]|| 2020-July-3 }}
</ol></li>
</ol></li>
<li>Retrofit flashings (metal flashings fitted together around a penetration and riveted or clamped together) shall be flashed with
<ol>
<li>base sheet membrane flashing carried up the vertical face of the flashing at least 203.2 mm (8") and past the base flange at least 101.6 mm (4"), and
<li>cap sheet membrane flashing which fully covers the base sheet flashing and extends past the termination of the base flashing by at least 50.2 mm (2")(Ref. [https://rpm.rcabc.org/index.php?title=SBS_2-Part_Retrofit_Flashing_(Cable_Penetration) Construction Detail "2-Part Retrofit Flashing (Cable Penetration)"]).
</ol></li>
<li>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 {{hilite | See '''Figure 12.3.2.3.-A'''|| 2025-October-25 }}){{hilite | {{strike| (Ref. Figure 12.3.2.-A) || 2024-November-1 }}, the gap between the penetration and the flashing must be bridged and sealed || 2023-October-28 }}
<ol>
<li>by wrapping the joint with a properly-sized piece of semi-cured EPDM (or its equivalent),
<ol>
<li>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"),
<li>installed free of wrinkles or fish-mouths,
<li>applied so that it extends on either side of the joint by at least 50.8 mm (2"), and
<li>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"), or
</ol></li>
<li>with  heat-shrink tubing that
<ol>
<li>{{hilite |extends onto both the flashing and the penetration || 2023-October-28 }} by at least 50.8 mm (2"),
<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>Penetrations that are flashed but are not immediately sealed using the methods described above must be temporarily protected from the weather with at least one properly fitted, level storm collar.
<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>On a vertical penetration where a seal cannot be made between the flashing and the penetration (i.e., where the penetration is a hot pipe, or where movement of the penetration is anticipated), the opening between the penetration and top of the flashing must be protected with
<ol>
<li>at least one storm collar, secured with a separate mechanical (screw-type) clamp, or
<li>no fewer than two storm collars, each manufactured with friction-type clips, and spaced approximately 25.4 mm (1") apart.
</ol></li>
<li>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.  
<li>Reinforced liquid membrane flashing systems may be used to seal a penetration on, or within 203.2 mm (8") of, the drainage plane, but only where
<ol>
<li>the penetration is structurally attached to a solid roof ''deck'' (concrete or mass timber), and
<li>the penetration is structurally independent of the roof ''deck'', but is of the same type of material (i.e., steel post passing through a steel deck), or
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of sheet membrane plies must be terminated on a vertical surface and other means of terminating them are not practicable or even possible.
</ol></li>
</ol></li>
</ol></li>
<br>
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.3.-A Alternate Flashing of Pipe Penetration''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 12.3.2.3.(16) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
|  [[File:Figure_12.3.2.-B_(Hot_Rubberized Asphalt).jpg |link=https://rpm.rcabc.org/images/1/1c/Figure_12.3.2.-B_%28Hot_Rubberized_Asphalt%29.jpg  | 400 px]]
|}

====12.3.2.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized, hot-welded flashings and vents may be installed on ''uninsulated systems'' or in a ''protected roof system'', provided they are installed on ''curbs'' no less than 203.2 mm (8") in height above the ''finished roof system surface'' (Ref. [[#11.1.3.2. Roof Drain Function and Location | Article 12.1.3.2.]]) and are sealed to the ''curbs'' with sheet membrane.
{{strike| <li>Galvanized surfaces must be prepared in keeping with the ''manufacturer’s'' published requirements. || 2022-October-28 }}

</ol></li>

====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations {{hilite | on new construction ''projects''|| 2020-July-3 }} must be separated from 
<ol>
<li>other penetrations, {{strike| drains, || 2023-June-15 }} 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){{strike| ; {{hilite | the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations. || 2023-June-16 }} || 2023-June-15 }}, and
<li>{{hilite | ''roof drains'' at least 457.20 (18") (Also see || 2024-June-15 }} [[#11.1.3.2. Roof Drain Function and Location | Article 11.1.3.2.]]{{hilite |) || 2024-June-15 }}.
</li></ol>
{{strike| {{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 }} || 2023-June-15 }}
<li>{{hilite | When the separation between penetration flashings does not conform to the minimum spacing requirements, the application options described in || 2024-June-15 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] {{hilite | must be followed || 2024-June-15 }}.
</li></ol>

====12.3.2.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>Sheet membrane flashing for ''curbs'' must provide continuous waterproofing from the roof field up the vertical plane, at least 203.2 mm (8”) above the ''finished roof system surface'' and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], unless otherwise specified or permitted in this Part; waterproofing of equipment installed on a curb (i.e., isolators and other mounts) is the responsibility of others.
<li>When specified by the ''manufacturer'', base sheet membrane flashing plies must be embedded in a hot coating of the primary membrane applied to the vertical substrate or ''parapet wall''.
<li>Exposed membrane edges on curbs must be protected from UV radiation, and from water intrusion, using a counter-flashing or options described in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>When installing heat-welded membranes, or where construction sequencing requires it, alternatives to conventional membrane flashing should be considered (Ref. [[#12.3.2.5. Alternative Approaches to Membrane Flashing | Article 12.3.2.5.]]).
<li>Reinforced liquid membrane flashing systems shall conform to the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and may be used only
<ol>
<li>where sheet membrane applications are not practicable (i.e., complex geometry), or
<li>where the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible (See also [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]]).
</ol></li>
<li>Sleepers or equipment pads that are completely sealed (enveloped) with sheet membrane must be at least 101.6 mm (4") in height above the ''finished roof system surface'', but when fully enveloped sleepers or equipment pads are capped with ''linear metal flashing'', they must be at least 127 mm (5") in height above the ''finished roof system surface'' to provide sufficient height for exposed fasteners.
<li>All penetrations through the top surface of a sleeper or equipment pad must be sealed using
<ol>
<li>a compression sealant between the membrane and equipment supports, and
<li>a universal sealant applied around the edges of equipment supports.
</li></ol>
<li>Equipment ("housekeeping") pads placed on top of the ''finished roof system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must be waterproofed to conform to the requirements for structural sleepers or equipment pads in this Section.
</ol></li>
</ol></li>

====12.3.2.5. Alternative Approaches to Membrane Flashing====

<ol>
<li>The ''Contractor'' must assess the best approach to waterproofing any detail, when site conditions or construction sequencing require alternatives to heat-welding.
<li>When alternative methods are required,
<ol>
<li>curbs must be flashed by adapting the methods described in [[SBS_Roof_Systems_Standard#10.3.8.2. Pre-flashing | Article 10.3.8.2.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", or by using other approaches that are equal or superior, and
<li>penetrations must be</span>
<ol>
<li>incorporated into an adhered or self-adhered field membrane system, or
<li>flashed by using a pre-flashing method that is suitable for the penetration.
</li></ol>
</li></ol>
</li></ol>

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

<ol>
<li>Any liquid flashing system shall be used only when permitted by the ''manufacturer'', and it's use shall conform to the permissible applications in this Article.
<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>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>for sheet membrane reinforcement (i.e., at corners),
<li>where abrasion resistance is desirable,
<li>where resistance to contamination of sheet membrane is necessary, or
<li>where the ''Design Authority'' specifies its application.
</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 is cut to 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") (Ref. Figure 12.3.2.-B).
<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 ({{hilite | See '''Figure 12.3.2.6.-A'''|| 2025-October-25}}).
<li>Single-component polyurethane and silicon-based liquid membrane flashing ''systems''
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and shall be listed in [[Division_C | Division C]],
<li>may be used
<ol>
<li>to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes, or
<li>to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]).
</ol></li>
<li>must not be used in the ''drainage plane'', or to reinforce membranes against abrasion,
<li>must be applied in two cured coats, unless otherwise permitted in this Standard, and
<li>must be fleece-reinforced between coats where
<ol>
<li>the application is considered permanent,
<li>a change in plane (angle) occurs, or
<li>there is a joint between two supports and the liquid membrane must serve as a bridge.
</ol></li>
</ol></li>
<li>Accessory PMMA detailing products
<ol>
<li>must be accepted by the '''''Guarantor''''', acceptable to the ''manufacturer'', and listed in [[Division_C | Division C]],
<li>must be reinforced with chopped or loose fibres,
<li>shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted,
<li>must be used at locations  101.6 mm (4”) or more above the ''drainage plane'', except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system, and
<li>must not be used where movement is expected.
</ol></li>
</ol></li>
<br>
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 12.3.2.6.(4) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
|  [[File:Figure 12.3.-B (Generic).jpg  |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg  | 400 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====
(See also Construction Detail [[SBS Railing | "Railing"]])

<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 ''finished roof surface''.
<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.</span>
</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>


<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 || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].  Additionally, the following terms are used in this Part: 
<ol>
<li>''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).
<li>''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").
<li>''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 ''roof system''.
</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>

===13.1.3. 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>''Linear metal flashings''
<ol>
<li>must be specified when UV-sensitive membranes require protection, or when membrane edges will otherwise be exposed to the sun, to water, or to physical damage, and
<li><span class="principles">may be specified to cover ''parapet'' caps, sleepers, or curbs</span> 
<ol>
<li><span class="principles">for aesthetic reasons</span>, or
<li><span class="principles">to protect the membrane from damage resulting from maintenance (i.e., pressure washing of decks or pavers), or from foot traffic</span>.
</li></ol>
</li></ol>
</li></ol>

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

<ol>
<li>Subject to the requirements in this Standard, 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'''|| 2025-October-25 }} and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 26-Gauge.
<li>Specified seam types shall conform to the requirements in {{hilite | '''Table 13.1.3.4.-B'''|| 2025-October-25 }} and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
</li></ol>
<br>
::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 13.1.3.4.-A.<br>Pre-finished Galvanized Steel Cap (Coping) Flashing (Gauge and Length Standards)''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 13.1.3.4.(1). || 2025-October-25 }}
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Horizontal Span !! Minimum<br>Slope !! Gauge !! Maximum Flashing<br>Segment Length !! 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% || 26, 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;"   | 304.8 - 914.4 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;"   | 914.4 mm (36") 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*
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]

::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Table 13.1.3.4.-B.<br>Pre-finished Galvanized Steel Vertical Flashing (Gauge and Length Standards)''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 13.1.3.4.(2). || 2025-October-25 }}
|-
|}

:::::{|  class="wikitable" style="margin-left: 0pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"  
|-
! Vertical Face !! Gauge!! Maximum Flashing<br>Segment Length !! Vertical Seam Options
|-
| Up to 152.4 mm (6") || 26 || 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*
|}
::''*'' Ref. [[#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><span class="recommended">''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</span>  (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
</li></ol>

====13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing====

<ol>
<li>{{hilite | Cap (coping) flashings || 2024-January-31 }}
<ol>
<li>{{hilite | are required for all ''parapets'' (including parapets on roof areas that are adjacent to each other), || 2024-January-31 }}
<li>{{hilite | are optional for roof dividers that are fully enveloped with roofing membrane (Ref. || 2024-January-31 }} [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), {{hilite | and || 2024-January-31 }}
<li><span class="recommended">{{hilite | are recommended on roof dividers where the membrane may be susceptible to abrasion or mechanical damage || 2024-January-31 }}</span>.
</li></ol>
<li>{{hilite | All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate || 2024-January-26 }}
<ol>
<li>{{hilite | at every seam, using S-locks or standing seam clips (Ref. || 2024-January-31 }} [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
<li>{{hilite | beneath the outside vertical face of the flashing, using hidden clips (Ref. || 2024-January-31 }}[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), {{hilite | and || 2024-January-31 }}
<li>{{hilite | on the roof-side (inside) face of the flashing. || 2024-January-31 }}
</li></ol>
<li>{{hilite | The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible. || 2024-January-31 }}
<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the roof-side of the parapet, to promote drainage (<span class="recommended">drainage toward the exterior of a building is <u>not recommended</u></span>).
<li>All metal cap (coping) flashing must be designed with full, solid support.
<li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
</li></ol>

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

<ol>
<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the roof, away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
</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>''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.
</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>The following minimum gauges and/or weights of <u>sheet steel materials</u> apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum  0.50 mm (0.0196", 26-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''': 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>'''Aluminum-Zinc alloy-coated steel''': minimum 0.50 mm (0.0196", 26-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 <u>non-ferrous materials</u> 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>'''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>Where a ''waterproofing system'' adjoins and "Architectural Sheet Metal System", ''linear metal flashings'' must be fabricated from 24-gauge steel stock.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>{{hilite | Fasteners must be|| 2021-June-30 }} 
<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 | specified by the ''Design Authority'',|| 2021-June-30 }} and
<li>{{hilite | appropriately sized, in both length and thread type, for the material to which they will be secured|| 2021-June-30 }}.
</li></ol>
<li>{{hilite | Nails are not acceptable as fasteners|| 2021-June-30 }}.
<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, corrosion-resistant screw or expansion fastener with a low-profile head and must be compatible with both the metal flashing material and the substrate. || 2023-October-28 }}
<li>{{hilite | in exposed locations must be at least No. 10., shall be gasketed (cladding screws), and must match the colour of the materials they fasten. || 2023-October-28 }}
</li></ol>
<li>{{hilite | When pre-engineered ''linear metal flashing systems'' are specified, fasteners provided by the manufacturer must be used|| 2022-February-5 }}.
<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
<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”, or
<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>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 Tables 13.1.-A, 
<li>shall incorporate seams conforming to the requirements in Table 13.1.-B, and
<li>may not exceed the maximum length of 3000 mm (120”).
</ol></li>
<li>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 {{hilite | and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).|| 2024-January-31 }}
<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''), and
<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>

====13.2.2.2. 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>

===13.3.2. 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 membrane used as eave protection in a ''water-shedding roof system'').
<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 roof 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 S-lock ({{hilite | '''Figure 13.3.2.2.-A'''|| 2025-October-25 }}) or Standing Seam ({{hilite | '''Figure 13.3.2.2.-B'''|| 2025-October-25 }}), but this requirement does not apply to|| 2021-October-30 }}
<ol>
<li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }}, 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''' 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''' 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>
<br>
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.3.2.2.-A S-Lock, Double'''<br>Forming Part of Sentence 13.3.2.2.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.3.2.2.-B Standing Seam'''<br>Forming Part of Sentence 13.3.2.2.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }}
|-
| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 300 px]] || [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 300 px]]
|}

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

<ol>
<li>Cap (coping) flashings must be 
<ol>
<li>{{hilite | solidly || 2024-January-31}} and fully supported {{strike| by a substrate || 2023-January-26 }},
<li>{{hilite | separated from organic materials (i.e., wood) with roofing membrane, || 2024-January-31 }}
<li>joined using standing seams or S-locks (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2.]]), and
<li>{{hilite | secured against displacement by wind. || 2024-January-31 }}
{{strike| <li>secured on the outside face with hidden clips (exposed fasteners are not permitted),
<li>secured on the inside face with a hidden clip, or with cladding fasteners, and
<li>joined using standing seams or S-locks, wherever the flashing face is exposed to the weather, unless otherwise provided for in this Part (See also [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]). || 2023-January-26 }}
</li></ol>
<li>{{hilite | In addition to the requirements in Sentence (1), cap (coping) flashing installed on ''parapets'' must be secured || 2024-January-31 }}
<ol>
<li>{{hilite | beneath the outside vertical face of the flashing with hidden clips that hook into the ''drip edge'' by at least 12.7 mm (1/2") (Ref. || 2024-January-31 }} [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]; exposed fasteners are not permitted), {{hilite |and || 2024-January-31 }}
<li>{{hilite | along the roof-side face of the flashing, using either hidden clips or cladding fasteners (the method used shall be what is specified by the ''Design Authority''). || 2024-January-31 }}
</li></ol>
<li>{{hilite | Unless otherwise permitted in this Standard or by a written Variance from the '''''Guarantor''''', hidden clips shall be secured to the vertical face of a ''parapet wall'' and shall not be mechanically attached to the top of the coping. || 2024-January-31 }}
<li>{{hilite | In addition to the requirements in Sentence (1), cap (coping) flashings installed on roof dividers and fire separation walls (Ref.|| 2024-January-31 }} [[#10.3.4.4. Fire Separations | Article 10.3.4.4.]])
<ol>
<li>{{hilite | may be face-fastened, provided the roof divider or fire separation wall is less than 1 m (39") tall, but || 2024-January-31 }}
<li>{{hilite | shall be secured with hidden clips on both sides when the roof divider or fire separation wall exceeds a height of 1 m. || 2024-January-31 }}
</li></ol>
<li>{{hilite | When using exposed screws to secure cap (coping) flashing is permissible, screws shall be located no more than 25.4 mm (1") above the break for the ''drip edge'' and provision shall be made for metal expansion and contraction. || 2024-January-31 }}
<li>{{hilite | Where hidden metal clips are required, they must || 2024-January-31 }}
<ol>
<li>{{hilite | be at least 24-gauge, || 2024-January-31 }}
<li>{{hilite | 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 || 2024-January-31 }}
<li>{{hilite | engage drip or safety edges by a minimum of 12.7 mm (1/2"). || 2024-January-31 }}
</li></ol>
<li>{{hilite | '''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C. || 2024-January-31 }} 
<li>{{hilite | '''Discontinuous concealed clips''' must || 2024-January-31}}
<ol>
<li>{{hilite | consist of a single clip, centred between the seams of each length of metal flashing, || 2024-January-31 }} 
<li>{{hilite | 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 || 2024-January-31 }}
<li>{{hilite | be fastened with screws spaced no more than 304.8 mm (12") O.C. || 2024-January-31 }}
</li></ol>
<li>Fasteners used to secure any cap, counter, or base flashing must be evenly spaced between seams along each length of flashing, and shall be
<ol>
<li>no fewer than three (3) fasteners for every 3048 mm (120") length of metal flashing, or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
<li>When cap (coping) flashings span widths greater than 304.8 mm (12”), and a flat butt seam is specified, the cap flashing must be riveted to the saddle to ensure adequate securement, and the rivets must be no further apart than 203.2 mm (8”).
<li>Parapets that intersect a wall must be flashed with a metal saddle flashing, as shown in the "Construction Details for Linear Metal Flashings" ([[Division_D | Division D]]).
<li>When the outside face of a cap flashing is concealed by a wall assembly, only the outside face may be lap-seamed, provided the overlap is no less than 101.6 mm (4”) and the overlapping metal is embedded in mastic.
<li>Counter-flashing must be secured to the vertical face, with fasteners or a reglet.
<li>Counter-flashing and termination bars installed as primary securement or protection of membrane flashing 
<ol>
<li>must be hemmed at the top edge and bent (broken) outward from the face of the wall by at least 45°, to form a groove for sealant (The hem shall measure at least 15.88 mm (5/8”) when measured from the break),
<li>shall be attached to the substrate with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>must be sealed along the top groove with a continuous bead of acceptable sealant, tooled to shed water away from the wall.
</li></ol>
<li>A second counter-flashing (to cover a term bar or primary counter-flashing)
<ol>
<li>applied as a “surface reglet” must be hemmed, broken, and sealed, as described above in this Article, and
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., but this spacing may be increased to no more than 609.6 mm (24”) O.C., provided the flashing maintains continuous contact with the substrate (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
<li>Base flashings
<ol>
<li>must “kick out” minimum 50.8 mm (2") over insulation and filter fabric (filter fabric must be tucked up behind the base flashing),
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li><span class="recommended">may be fashioned as one piece, or as a 2-piece flashing that includes a lower, detachable segment to facilitate roof maintenance</span>.
</li></ol>
<li>''Linear metal flashing'' secured in a ''reglet'' (cut groove) must be
<ol>
<li>installed above the membrane flashing,
<li>inserted at least 12.7 mm (1/2”),
<li>friction-fitted within the ''reglet'' or secured on the exposed face with an acceptable fastener, and
<li>sealed with a continuous bead of tooled gunnable sealant.
</li></ol>
<li>Where parallel and overlapping reglet flashings are used, the joints between flashing segments must be offset by at least 304.8 mm (12”), except at corners.
</li></ol>

====13.3.2.4. Metal Edge Terminations====

<ol>
<li>Metal edge terminations (including "gravel stop" flashings) are integrated into the membrane ''system'' and therefore shall be installed to conform to [[#10.3.4.2. Low Profile Edges | Article 10.3.4.2.]]
</li></ol>

====13.3.2.5. Canted Edges====

<ol>
<li>Metal flashings on canted edges must be face-fastened on the exterior face of the flashing or, when the height of the canted edge permits, at least 88.9 mm (3-1/2”) above the drainage plane.
<li>Flashing must be secured with cladding fasteners, evenly spaced between seams along each length of flashing, using no fewer than
<ol>
<li>three (3) fasteners for every 3048 mm (120") length of metal flashing, or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
</li></ol>

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

=Part 14 - The Roof as a Platform=
==Section 14.1. Design==
(This Part covers the design and installation requirements for roofs that support an ''overburden'', which may be structurally supported or directly supported by the ''roof assembly'')

(See [[Notes to Hot Rubber Standard#A-14.1. | Note A-14.1.]])

===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-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].  Additionally, the following terms are used in this Part: 
<ol>
<li>''Roof Coverings'' means (without limitation) gravel, wearing surfaces, ''Vegetated Roof Systems'', pavers, cast-in-place concrete, rubberized surfaces, broadly covering and directly superimposed on the ''roof assembly''.
<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 Guarantee''''' or '''''RoofStar 10-year Guarantee'''''.
</li></ol>

===={{hilite | 14.1.2.3. RoofStar Vegetated Roof Guarantee || 2025-October-25 }}====

<ol>
<li>To qualify for a '''''RoofStar Vegetated Roof Guarantee''''', the supporting ''roof assembly'' shall 
<ol>
<li>comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or a '''''RoofStar 10-year Guarantee''''',
<li>be acceptable to the manufacturer as support for a ''vegetated roof system'', and
<li>comply with the related requirements in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”].
</li></ol>
</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>Roof assemblies 
<ol>
<li>must be designed as a ''protected roof system'' when they cannot support the superimposed loads described above (See also [[#8.1.4.1. Use Over Sensitive Materials and Systems | Article 8.1.4.1.]]).
<li>{{hilite | must be designed as a ''protected roof system'' when the roof covering is || 2025-October-25 }}
<ol>
<li>{{hilite | a ''semi-intensive vegetated roof system'', or || 2025-October-25 }}
<li>{{hilite | an ''intensive vegetated roof system''  || 2025-October-25 }}(See [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.2._Permitted_Vegetated_Roof_Systems Article 1.1.3.2.], {{hilite | “RGC Standard for Vegetated Roofs”)|| 2025-October-25 }}.
</li></ol>
<li><span class="recommended">should be designed as a ''protected roof system'' when the ''roof covering'' or living (amenity) space</span> 
<ol>
<li><span class="recommended">exceeds 152.4 mm (6”) in depth{{strike| (excluding any plants) || 2024-October-29 }}</span>,
{{strike| <li><span class="recommended">is an intensive or semi-intensive ''Vegetated Roof System''</span>, || 2024-October-29 }}
<li><span class="recommended">includes cast-in-place concrete surface</span>,
<li><span class="recommended">is installed over a podium roof area adjacent to residential high-rise structures</span>,
<li><span class="recommended">includes water features or pools</span>, or
<li><span class="recommended">includes expansive terrace areas or play spaces</span>.
</li></ol>
</li></ol>
<li>{{hilite | When the superimposed load is a ''vegetated roof system'', the design of the supporting ''roof assembly'' shall conform to the requirements in|| 2025-October-25 }} [[VRA Standard#1.1.3.1. Permitted Supporting Roof Assemblies | {{hilite | Article 1.1.3.1.]] || 2025-October-25 }} {{hilite | and || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#1.1.3.2._Permitted_Vegetated_Roof_Systems {{hilite | Article 1.1.3.2.|| 2025-October-25 }}] {{hilite | of the “RGC Standard for Vegetated Roofs” and shall take into consideration the future loads from a mature, fully saturated ''vegetated roof''|| 2025-October-25 }}.
<li><span class="principles">Structural supports (i.e., curbs) should be considered to bear heavier dead loads, to resist ''Specified Wind Loads'', or to secure the equipment during seismic events</span>.
</li></ol>

====14.1.3.3. Securement of Roof Coverings, 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>{{hilite | ''Vegetated roof systems'' shall be secured in keeping with the requirements of the|| 2025-October-5 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard {{hilite | “RGC Standard for Vegetated Roofs”] || 2025-October-5 }}.
<li>Where structural securement is desirable or required, 
<ol>
<li>structural supports must be fully waterproofed (curbs, sleepers, posts) and 
<li>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>
</li></ol>

====14.1.3.4. Design for Repairs and Renewal====

<ol>
<li><span class="principles">Each design should, without limitation, include consideration for</span>
 <ol>
<li><span class="principles">the inevitability of roof repairs or replacement,</span>
<li><span class="principles">access for maintenance</span>, and
<li><span class="principles">material removal, storage, and replacement logistics</span>.
</li></ol>
</li></ol>

====14.1.3.5. Reserved====

====14.1.3.6. Membrane Protection====

<ol>
<li>Membranes must be protected from damage incurred 
<ol>
<li>during the construction of a building,
<li>from normal use and occupancy of the roof, and
<li>from maintenance of any installation on top of a ''roof system'', after the building has been commissioned.
</li></ol>
<li><span class="recommended">To prevent accidental damage and puncture from falling objects, ''conventional insulated systems'' at elevations lower than those designed for human occupancy should include a protective wearing course or, in the alternative, should be designed as a ''protected roof system''</span>.
<li>Where membranes installed on vertical surfaces may be damaged from foot traffic or shifting coverings, they must be protected (i.e., with base metal flashing; ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]).
</li></ol>
</li></ol>

====14.1.3.7. Membrane Integrity Testing and Electronic Leak Detection====
(See [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] and [[#1.1.3.4. Electronic Leak Detection | Article 1.1.3.4.]])

====14.1.3.8. Drainage====

<ol>
<li>Roofs designed as platforms to support ''roof coverings'', amenity spaces, or equipment must promote unimpeded drainage of storm or irrigation water.
<li>{{hilite | The drainage of a ''roof assembly'' supporting a ''vegetated roof system'' shall be designed in coordination with the design requirements in the || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard {{hilite | “RGC Standard for Vegetated Roofs” || 2025-October-25 }}].
<li>Where a ''roof covering'' material naturally drains (i.e., gravel), no additional drainage design is required, but when it does not naturally drain, the design must incorporate a ''drainage plane'' on top of the completed ''roof system''.
<li>''Overburden'' must be contained with drain guards, rigid barriers, and filter fabric (See also [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>To facilitate the adequate movement of water and minimize or prevent damming when non-structural supports are oriented perpendicular to (across) the direction of drainage, the design must
<ol>
<li>specify shorter supports, to a maximum length of 1219.2 mm (48"), and
<li>incorporate drainage mats beneath supports longer than 1219.2 mm (48") in any direction.
</li></ol>
<li>Equipment installed on structural supports, or on top of the ''roof system'', must be spaced or located to promote access to drains, ease of maintenance, and worker or occupant safety.
</li></ol>

====14.1.3.9. Filter Fabric====

<ol>
<li>Filter fabrics are required when the roof supports
<ol>
<li>{{hilite | a ''vegetated roof system'' (See|| 2024-October-29 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#PART_6 {{hilite | Part 6 || 2025-October-25 }}] {{hilite | in the “RGC Standard for Vegetated Roofs”)|| 2025-October-25 }}{{strike| growing media and vegetation || 2024-October-29 }},
<li>sand and other fine materials,
<li>gravel with a diameter less than 12.7 mm (1/2”),
<li>wet mortar or concrete, or
<li>XPS insulation above the membrane (See [[Notes to Hot Rubber Standard#A-14.1.3.9. | Note A-14.1.3.9.]]).
</li></ol>
</li></ol>

====14.1.3.10. Gravel====
(See [[Notes to Hot Rubber Standard#A-14.1.3.10. | Note A-14.1.3.10.]])

<ol>
<li>When {{hilite | smooth stone {{strike| gravel|| 2024-October-29 }} (aggregate rock) || 2025-October-25 }} is specified as the ''roof covering'' (different from ballast),
<ol>
<li>only washed gravel may be used, and
<li>the design must include gravel guards around roof drains.
</li></ol>
<li>When the gravel used as a roof covering is crushed, or is smaller than 12.7 mm (1/2”),
<ol>
<li>a geotextile protection layer must be installed immediately above the roof membrane, and
<li>the {{hilite | crushed || 2025-October-25 }} gravel must be deep enough to hold the geotextile protection layer in place.
</li></ol>
</li></ol>

====14.1.3.11. Wearing Surfaces====
(See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4.]] concerning wearing surfaces and drainage requirements)

<ol>
<li>Any wearing surface may be installed on an ''uninsulated system'', provided
<ol>
<li>the compressive strength of the insulation will support it,
<li>insulation is covered with a suitable overlay (See [[#8.1.4.1. Use Over Sensitive Materials and Systems | Article 8.1.4.1.]]),
<li>the wearing surface does not bond with or touch the roof field membrane or membrane flashing, and
<li>drainage of storm or irrigation water is not impeded.
</li></ol>
<li>When a wearing surface is specified,
<ol>
<li>it must incorporate measures to protect the roof membrane from damage,
<li>perimeter membranes and penetrations must be protected from abrasion by the wearing surface,
<li>the design must provide a drainage space below the wearing surface measuring at least 12.7 mm (1/2”) in depth, and
<li>the design must provide a vertical drainage gap between the wearing surface and any openings.
</li></ol>
<li>When cast-in-place concrete is specified as the wearing surface (See [[Notes to Hot Rubber Standard#A-14.1.3.11. | Note A-14.1.3.11.]]), the design must conform to the other requirements in this Article, and the concrete must be separated from the membrane with
<ol>
<li>a bond-breaking material, such as a proprietary drainage mat or XPS insulation, and
<li>filter fabric or a barrier material acceptable to the membrane manufacturer, able to prevent the concrete slurry from reaching the membrane.
</li></ol>
</li></ol>

====14.1.3.12. Vegetated Roof Systems====

<ol>
<li>{{hilite | ''Vegetated Roof Systems'' (VRS) must be designed to meet the requirements in the|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard {{hilite |“RGC Standard for Vegetated Roofs”|| 2025-October-25 }}]{{hilite |; this includes membrane protection, drainage, water retention materials, filter fabrics, etc.|| 2025-October-25 }}
{{strike| to resist the ''Specified Wind Loads'', determined using the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Load Calculator for Vegetated Roof Assembly"] or, in the alternative, another method that is its equal or superior, for buildings up to 20 m (65') in height (Ref. [[#3.3.2.3. Securing Roofs with Overburden | Article 3.3.2.3.]]).
<li>Where a ''Vegetated Roof Systems'' is specified as ballast, it may be installed by someone other than the ''Contractor'', but the coordination of work between the ''Contractor'' and other trades must be specified by the ''Design Authority'' to ensure the ''roof system'' is immediately and properly secured.
<li>''Conventionally insulated systems'' may be used to support any type of ''Vegetated Roof System'', provided
<ol>
<li>the compressive strength of the insulation will support it,
<li>the insulation in the ''roof system'' is overlaid with a suitable insulation overlay (See [[#8.1.4.1. Use Over Sensitive Materials and Systems | Article 8.1.4.1.]]),
<li>the membrane manufacturer is agreeable to the application and is confident the membrane can withstand the anticipated hydrostatic pressures when the ''Vegetated Roof System'' is fully saturated with water, and
<li>the membrane is fully adhered.
</li></ol>
<li><span class="recommended">''Semi-intensive'' and ''Intensive Vegetated Roof Systems'' should be designed as part of a ''protected roof system''</span>.
<li>Every roof that supports a ''Vegetated Roof System'' must include, in addition to a drainage layer and membrane protection, a
<ol>
<li>full-coverage root barrier, and
<li>filter fabric layer.
</li></ol>
<li><span class="principles">''Vegetated Roof Systems'' that are built in place should be designed with an additional layer of protection immediately below the growing media and above the rest of the ''roof system'', to ensure the protection of these materials from tools</span>.
<li>''Separation zones'' 
<ol>
<li>are required to separate growing media and vegetation from (without limitation) ''parapets'', ''walls'', penetrations, drains, ''curbs'', sleepers, ''expansion joints'', and ''control joints'',
<li>must be at least 304.8 mm (12”) wide but shall in any event be designed to the width required to resist ''Specified Wind Load'', and
<li>shall be bordered by non-penetrating, restraining curbs or edging, installed around the perimeter of the ''Vegetated Roof System''.
</li></ol> || 2024-October-29 }}
</li></ol>

====14.1.3.13. Structures and Equipment====

<ol>
<li>Non-structural installations superimposed on a ''roof assembly''
<ol>
<li><span class="recommended">are recommended for smaller installations, to</span>
<ol>
<li><span class="recommended">minimize the number of penetrations, curbs, or sleepers necessary for structural securement</span>,
<li><span class="recommended">eliminate possible weak points in the ''roof system'', where a leak may occur</span>,
<li><span class="recommended">avoid dedicated mechanical drainage</span>, and
<li><span class="recommended">simplify removal of materials when membrane repairs are required</span>.
</li></ol>
<li>must take into account inevitable roof renewal (see [[Notes to Hot Rubber Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
<li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, and
<li>may be placed on an ''insulated roof system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]). 
</li></ol>
<li>{{hilite | Structurally supported || 2025-October-25 }} installations that are
<ol>
<li>'''cast-in-place''' must be constructed on a pre‐curb that is continuously waterproofed as part of the primary roof membrane and waterproofed independently of the primary roof membrane.
<li>'''pre-cast''' must be secured
<ol>
<li>to a pre‐curb that is continuously waterproofed as a continuation of the primary roof membrane, or
<li>to structural supports that are waterproofed in keeping with the requirements in [[#Part 12 - Penetrations and Curbs | Part 12]].
</li></ol>
</li></ol>
<li>When concrete walls or structures are constructed without a pre-curb, all concrete surfaces must be fully and continuously enveloped with the primary roof membrane (See also [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]]).
<li>Pre‐curbs must be
<ol>
<li>at least 101.6 mm (4") in height above the drainage plane of the highest adjacent ''roof assembly'',
<li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs), and
<li>properly waterproofed around dowels in their final position, using
<ol>
<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
<li>two cured coats of an Accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
</li></ol>
</li></ol>
<li>When a structural planter adjoins a ''protected roof system'', the planter design must include
<ol>
<li>a plumbed mechanical drain, inclusive of
<ol>
<li>a plumbed mechanical drain {{hilite | conforming to the requirements for planter drains in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”] || 2025-October-25 }}, {{strike| inclusive of
<ol>
<li>a debris guard, extending above the top surface of the growing media at least 50.8 mm (2”), and 
<li>maintenance access, || 2024-October-29 }} or
{{strike| </li></ol> || 2024-October-29 }}
<li>When a structural planter adjoins an ''insulated roof system'', only a plumbed mechanical drain is permissible.
<li><span class="recommended">A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features</span>.
<li>Tiles or other architectural finishes may be applied to the waterproofing membrane, subject to a written Variance from the '''''Guarantor''''' and approval by the membrane manufacturer (See [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]]).
<li>Drains, re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
<li>When a leak detection system is specified, only non‐ferrous metal drains may be used.
</li></ol>

==Section 14.2. Materials==
===14.2.1. Material Properties===
====14.2.1.1. Field and Flashing Membranes====

<ol>
<li>Refer to [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]] for field membrane composition, thickness, and selection.
<li>Single and 2-component liquid membrane flashing systems used on any detail, including pre-curbs, must be listed in [[Division_C | Division C]], and must be proprietary to, or accepted by, the ''manufacturer''. 
</li></ol>

====14.2.1.2. Membrane Protection====

<ol>
<li>Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
</li></ol>

===={{hilite | 14.2.1.3. Reserved || 2025-October-25 }}{{strike| Root Intrusion Barriers || 2024-October-29 }}====

{{strike| <ol>
<li>Root barriers
<ol>
<li>must be suitable for the installed ''roof covering'',
<li>must be selected for their ability to support dead loads, live loads, and point loads, and
<li>must be acceptable to the ''manufacturer''.
</li></ol>
</li></ol> || 2024-October-29 }}

====14.2.1.4. Drainage and Water Retention Materials====

<ol>
<li>{{hilite | Drainage mats, geo-synthetic drainage cores, and geo-composites used beneath any non-vegetated ''overburden''|| 2025-October-25 }}, must be 
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''roof covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>Moisture retention and reservoir layers must be acceptable to the manufacturer/supplier of the ''Vegetated Roof System''.
</li></ol>

====14.2.1.5. Insulation and Insulation Overlays====
(See [[#Part 7 - Insulation | Part 7, "Insulation"]], and [[#Part 8 - Insulation Overlays | Part 8, "Insulation Overlays"]])

<ol>
<li>When XPS (with or without a concrete topping) is specified as the drainage layer, it must be grooved (by the manufacturer, or as a post-manufacturing alteration).
<li>Insulation and ''insulation overlays'' must have a minimum load carrying capacity of 110 Kpa (20 psi), but in any event must be capable of supporting any loads superimposed on the membrane, without compression or distortion of the ''roof system'' or any one of its components.
</li></ol>

====14.2.1.6. Filter Fabric====

<ol>
<li>Filter fabrics must be 
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''roof covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>{{hilite |The properties, composition, and supply of filtration fabrics used in a ''vegetated roof system'' shall conform to the requirements in|| 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.2.1.3._Filtration_Layers {{hilite | Article 6.2.1.2. || 2025-October-25 }}] {{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-25}}.
<li>Fabric filter mats must be 
<ol>
<li>water permeable and have proven long term weather resistance, and
<li>strong enough to withstand traffic abuse and prevent displacement of insulation boards under flotation conditions.
</li></ol>
</li></ol>

====14.2.1.7. Decorative Gravel====

<ol>
<li>Decorative gravel {{hilite | (aggregate) || 2025-October-25 }} (See [[Notes to Hot Rubber Standard#A-14.1.3.10. | Note A-14.1.3.10.]]) must be washed and may be smooth or crushed.
<li>Large grade gravel may withstand wind scour more effectively than smaller gravel, but the ''Design Authority'' must determine the gradients, based on the ''Specified Wind Loads'' for the roof (See also [[#3.2.2.3. Gravel Ballast | Article 3.2.2.3., ''Gravel Ballast'']]).
</li></ol>

====14.2.1.8. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) must be capable of resisting anticipated loads.
<li>Pedestals 
<ol>
<li><span class="principles">should be adjustable when a level surface is required</span>, and
<li>must be purpose-made and include an integral spacer rib no more than 4.76 mm (1/8”) wide, to uniformly separate pavers.
</li></ol>
</li></ol>

==Section 14.3. Application==
===14.3.1. Guarantee Term Requirements===
====14.3.1.1. 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>

====14.3.1.2. 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>

===14.3.2. All Systems===
====14.3.2.1. Membranes and Membrane Protection====

<ol>
<li>Membranes and membrane flashing must be installed in keeping with the requirements found elsewhere in this Standard.
<li>Protection of roof membranes from mechanical damage caused by tools, accident or the work of others is mandatory during the installation and maintenance of any ''roof covering'' or living space (See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4., "Membrane Protection"]], for related requirements).
</li></ol>

====14.3.2.2. Filter Fabric====

<ol>
<li>Fabric filter rolls {{hilite | used in any system other than a ''vegetated roof system''|| 2025-October-25 }} must be 
<ol>
<li>at least 2489.2 mm (98") wide,
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''roof covering'',
<li>overlapped at all edges a minimum of 304.8 mm (12"),
<li>slit to fit over roof penetrations,
<li>cut out around roof drains and other openings,
<li>carried up all vertical transitions (including penetration flashings) above the ''finished roof system surface'' at least 76.2 mm (3”), and
<li>loosely held in place at all perimeter edges and curbs, behind metal counter flashings or wall finishes, and
<li>secured around penetration flashings.
</li></ol>
</li></ol>

====14.3.2.3. Drainage {{strike| and Water Retention || 2024-October-29 }}====

<ol>
<li>{{hilite | The location of the drainage layer(s) shall conform to the requirements in [[#Part 7 | Part 7]]|| 2025-October-25 }}{{strike| A drainage mat must be installed below the XPS insulation || 2024-October-29 }}.
<li><span class="principles">A second drainage layer may be installed above the insulation, but this is at the discretion of the ''Design Authority''</span>.
<li>Specialized proprietary drainage products must be acceptable to the ''manufacturer''.
</li></ol>

====14.3.2.4. Decorative Gravel====

<ol>
<li>When gravel {{hilite | (aggregate) || 2025-October-25 }} is specified as a ''roof covering'', only washed gravel may be used.
<li>Ballast guards must be installed around all roof drains (See [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>Crushed gravel specified as a ''roof covering'' must be 
<ol>
<li>installed over a geotextile protection layer, or its equivalent, when the gravel is crushed or smaller than 12.7 mm (1/2”) in diameter, and
<li>must be applied in quantities sufficient to hold down the protection layer against displacement by wind.
</li></ol>
</li></ol>

====14.3.2.5. Wearing Surfaces====

<ol>
<li>Pavers and unit-type masonry, such as brick or stone, must be supported by
<ol>
<li>proprietary (purpose-made) pedestals with at least a 4.76 mm (1/8”) integral spacer ribs for uniform spacing of pavers,
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1") in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals, or a drainage layer,
<ol>
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling, and
<li><span class="principles">should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads</span>.
</li></ol>
<li>Cast-in-place concrete installed directly above the roof membrane must be separated from the membrane and its protection layers with material and a filter fabric or barrier material specified by the ''Design Authority'' and conforming to the requirements in [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]]
</li></ol>

====14.3.2.6. Vegetated Roof Systems====
(See [[Notes to Hot Rubber Standard#A-14.3.2.6. | Note A-14.3.2.6.]])

<ol>
<li>{{hilite | All ''Vegetated Roof Systems'' must be installed according to the requirements in the [[VRA Standard | “RGC Standard for Vegetated Roofs”]]|| 2025-October-25 }}.
{{strike| as specified and shown on drawings, and in any case must include a 
<ol>
<li>root barrier,
<li>drainage layer, and
<li>filter cloth.
</li></ol>
<li><span class="principles">Roofs that support built-in-place soil or growing media beds should include an additional penetration-resistant protection course between the growing bed and other ''Vegetated Roof System'' materials</span>.
<li>Root intrusion barriers must be
<ol>
<li>installed in a continuous plane above the roof membrane,
<li>located within the ''Vegetated Roof System'' as specified by the ''Design Authority'',
<li>sealed at all seams and laps with a compatible tape, as directed by the manufacturer's instructions,
<li>carried up the inside of soil retention perimeters used to separate growing media and vegetation from (without limitation) ''parapets'', ''walls'', penetrations, drains, ''curbs'', sleepers, ''expansion joints'', and ''control joints'' (the "separation zone"), and
<li>sealed to the ''separation zone'' edge material.
</li></ol>
<li>''Separation zones'' must be installed to conform to the design of the ''Vegetated Roof System'', and shall also conform to the requirements in [[#14.1.3.12. Vegetated Roof Systems | Article 14.1.3.12.]]
<li>Membrane flashing must be protected from damage, both during the installation of a ''Vegetated Roof System'', and during ongoing maintenance. || 2024-October-29 }}
</li></ol>

====14.3.2.7. Structures and Equipment====

<ol>
<li>Structural installations (i.e., planters, pools, ponds, or water courses) must be constructed with 
<ol>
<li>a pre‐curb (start‐up curb), onto which the installation is formed and poured, or
<li>full-height walls that are formed and poured in direct contact with the structural ''deck''.
</li></ol>
<li>Pre‐curbs ({{hilite | '''Figure 14.3.2.7.-A''' || 2025-October-25 }}) must
<ol>
<li>achieve a finished height at least 101.6 mm (4") above the ''drainage plane'' of the highest adjacent ''roof assembly'' (For an example of this see Construction Detail [[SBS Structural Planter | "Structural Planter"]]), and
<li>be completely enveloped with fully adhered acceptable sheet or liquid membrane flashing (including all faces of drainage knock‐outs).
</li></ol>
<li>All planters and water features must be fully waterproofed on the inside; sheet membrane installation must conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], and liquid membrane flashing shall conform to the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
<li>All membrane flashing shall terminate
<ol>
<li>on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or
<li>on the inside face of the planter wall with a cut reglet ''linear metal flashing'', caulked with sealant and installed no less than 50.8 mm (2”) above the top surface of growing media.
</li></ol>
<li>Structural installations that do not incorporate pre-curbs must be
<ol>
<li>flashed to cover the complete exterior surface with roof membrane, or
<li>flashed with sheet membrane that is installed, terminated, and protected to conform to [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>
<br>
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
|-
| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
|}

<li>Dowels (reinforcement bar) must be
<ol>
<li>inserted into the pre‐curb after application of the membrane flashing, and
<li>waterproofed in their final position, where they penetrate the pre-curb.
</li></ol>
<li>Dowels must be waterproofed with
<ol>
<li>a single application of an accepted, fleece-reinforced 2-component liquid membrane flashing, or
<li>two (2) applications of a single-component liquid membrane flashing,
<ol>
<li>applied to properly prepared surfaces,
<li>fully cured between coats,
<li>in keeping with the application requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]], for 2-component reinforced liquid membrane flashing, or the manufacturer’s instructions, when using a single-component liquid membrane flashing, and</span>
<li>applied no less than 50.8 mm (2”) on vertical surfaces and in a radius around the base of each dowel.
</li></ol>
</li></ol>
<li>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
</li></ol>

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

=[[Notes to Hot Rubber Standard | Notes to Standard]]=

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