VRA Standard - Revision history

James Klassen: /* Preface */

2026-05-11T15:04:53Z

‎Preface

James Klassen: /* 6.2.1.2. Drainage Layers */

2026-05-07T16:03:49Z

‎6.2.1.2. Drainage Layers

James Klassen: /* 5.1.1.2. Definitions */

2026-04-02T19:00:53Z

‎5.1.1.2. Definitions

James Klassen: /* 1.1.1.8. Pre-Design Requirements */

2026-03-25T16:14:39Z

‎1.1.1.8. Pre-Design Requirements

James Klassen: /* 5.1.3.3. Separation of vegetation from roofing details */

2025-11-25T15:43:04Z

‎5.1.3.3. Separation of vegetation from roofing details

James Klassen: /* 5.1.3.3. Separation of vegetation from roofing details */

2025-11-21T17:00:34Z

‎5.1.3.3. Separation of vegetation from roofing details

James Klassen: /* 5.1.3.3. Separation of vegetation from roofing details */

2025-11-21T16:46:19Z

‎5.1.3.3. Separation of vegetation from roofing details

James Klassen: /* 1.1.1.5. Undefined Terms */

2025-08-12T15:20:15Z

‎1.1.1.5. Undefined Terms

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James Klassen at 22:24, 18 October 2024

2024-10-18T22:24:06Z

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James Klassen: Created page with "TBA"

2024-07-30T16:36:22Z

Created page with "TBA"

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 </li></ol>
 <br>
-Although this Standard contains numerous best practices for ''green roofing'' and covers a broad range of materials, its purpose is to support the RGC '''''RoofStar Guarantee Program'''''.  Readers are advised to consult [https://rpm.rcabc.org/index.php?title=Scope_of_RPM_and_Standards Part 1] of Division A in the Roofing Practices Manual (RPM) concerning the scope and limitations of this Standard.  Coverage afforde by a '''''RoofStar Vegetated Roof Guarantee''''' is described in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1.] of Division A.
+Although this Standard contains numerous best practices for ''green roofing'' and covers a broad range of materials, its purpose is to support the RGC '''''RoofStar Guarantee Program'''''.  Readers are advised to consult [https://rpm.rcabc.org/index.php?title=Scope_of_RPM_and_Standards Part 1] of Division A in the Roofing Practices Manual (RPM) concerning the scope and limitations of this Standard.  Coverage provided by a '''''RoofStar Vegetated Roof Guarantee''''' is described in [https://rpm.rcabc.org/index.php?title=Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage Article 3.2.1.1.] of Division A.
 This document is not a complete guide to ''green roofing''. It is not a designer’s or consumer’s guide and does not describe the benefits, co-benefits, or limitations of a vegetation-covered roof; an abundance of printed literature and online publications already provide a wealth of information for those who wish to become better informed or educated.  Nor does this Standard purport to address all issues that may arise, including matters of worker or visitor safety on the roof.  Too many variables, including the myriad of design options, preclude the practicality of such an approach.  It is incumbent on the user of this Standard to possesses a level of knowledge, understanding, and competency, in order to make thoughtful, considered choices in the design, construction, and maintenance of a green roof.  Although innovative design is encouraged, each design will necessarily be limited by this Standard and may be limited by the availability of systems supplied by ''vegetated roof system manufacturers''.  Vegetated roof designs should be responsibly considered, be responsive to the ''project'' objectives, focus on performance, and must be designed for maintenance.  Within the scope of this Standard, much is possible and permissible.  However, not everything permissible is necessarily advisable; good judgement must be exercised at the design stage to ensure a ''project’s'' success, and good judgement reaches well beyond what this Standard can address.

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 <li>Static Puncture resistance: ASTM D6241 – 14, “Standard Test Method for Static Puncture Strength of Geotextiles and Geotextile-related Products using a 50-mm Probe”.
 </li></ol>
-<li>Where a mineral aggregate is used as the drainage medium, the aggregate shall conform to the requirements for ''separation zone'' fill in [[# | Article 5.2.1.4.]]
+<li>Where a mineral aggregate is used as the drainage medium, the aggregate shall conform to the requirements for ''separation zone'' fill in [[#5.2.1.4. Separation Zone Fill | Article 5.2.1.4.]]
 </li></ol>

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 </li></ol>
-====5.1.1.2. Definitions====
+====5.1.1.2. Defined Terms====
 <ol>
 <li>Words that appear in italics are defined in the [[Glossary | Glossary]].

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 <ol>
-<li>The ''Coordinating Registered Professional'' is responsible to ensure that the ''vegetated roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, building envelope, landscaping, together with all trades whose work intersects with vegetated roofing, to minimize out-of-sequence operations that could compromise the integrity of the ''green roof''  (See [[#10.1.3.2. Sequencing of Operations | Article 10.1.3.2., “Sequencing of Operations”]] and [[#10.3.2.1. Coordination of Work | Article 10.3.2.1., “Coordination of Work”]]).
+<li>The ''Coordinating Registered Professional'' is responsible to ensure that the ''vegetated roof assembly'' design is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, building envelope, and landscaping, together with all trades whose work intersects with vegetated roofing, to minimize out-of-sequence operations that could compromise the integrity of the ''green roof''  (See [[#10.1.3.2. Sequencing of Operations | Article 10.1.3.2., “Sequencing of Operations”]] and [[#10.3.2.1. Coordination of Work | Article 10.3.2.1., “Coordination of Work”]]).
 <li>The ''vegetated roof assembly'' must be designed to accommodate expected future changes to the roof or its occupancy, as later modifications that directly impact the assembly and the '''''RoofStar Guarantee''''' may significantly alter or even void coverage (See [[#1.1.1.2. Coverage and Limitations | Article 1.1.1.2., “Coverage and Limitations”]]; see also [[#11.3.2.7. Removal and Repair | Article 11.3.2.7., “Removal and Repair”]]).
 <li><span class="principles">All ''vegetated roof assemblies'' should be designed with or by a professional skilled in the work concerned, using the Critical Path Method</span>.

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 <li>shall extend past the edge of roof membrane flashing in drain sumps by at least 152.4 mm (6”) when drain sumps are incorporated into the supporting ''roof assembly'',
 <li>shall be designed with non-combustible materials, and with suitable dimensions, when they are used as fire protection zones adjacent the building façade or other vulnerable structures and building details, and
-<li>shall be bordered by non-penetrating restraining ''curbs'' or edging, installed around the perimeter of the ''vegetated roof system'', that do not impede drainage (See [[#5.2.1.2. Root Barriers | Article 5.2.1.2.]]).
+<li>shall be bordered by non-penetrating restraining ''curbs'' or edging, installed around the perimeter of the ''vegetated roof system'', that do not impede drainage (See [[#5.2.1.3. Edging | Article 5.2.1.3.]]).
 </li></ol>
 <li>Unless otherwise specified in this Article, the minimum width of a ''separation zone'' shall be 304.8 mm (12”), but the width of the separation zone shall be no less than

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 | colspan="1"; style="text-align:center;width:550px;" | '''Figure 5.1.3.3.-A'''<br>'''Separation of Vegetation from Roofing Details'''<br>Forming Part of Article 5.1.3.3.<br><small>(Click to expand)</small>
 |-
-| [[File:VRA Standard Figure 5.1.3.3..png | link=https://rpm.rcabc.org/images/2/2d/VRA_Standard_Figure_5.1.3.3..png| 550 px]]
+| [[File:VRA - Illustration - Figure 5.1.3.3.-A.png | link=https://rpm.rcabc.org/images/f/ff/VRA_-_Illustration_-_Figure_5.1.3.3.-A.png| 550 px]]
 |}

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 <ol>
 <li>are required to separate ''growing media'' and ''vegetation'' from roofing work around or adjacent to (without limitation) ''parapets'', ''walls'' (including doors and other low openings in walls), penetrations (including fall protection anchors), ''roof drains'', ''scupper drains'', ''curbs'', skylights, sleepers, ''expansion joints'', ''control joints'', and equipment permanently mounted on the roof (i.e., antennae or items supported by a housekeeping pad),
-<li>shall conform to the minimum dimensions specified in this Article (Also see '''Figure 5.1.3.3.''').
+<li>shall conform to the minimum dimensions specified in this Article (Also see '''Figure 5.1.3.3.-A''').
 <li>are not required around the exterior of non-structural planters or inside structural planters (See [[#10.1.4.1. General Requirements for Planters | Article 10.1.4.1.]]),
 <li>shall extend past the edge of roof membrane flashing in drain sumps by at least 152.4 mm (6”) when drain sumps are incorporated into the supporting ''roof assembly'',
@@ Line 1,036: / Line 1,036: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:550px;" | '''Figure 5.1.3.3.'''<br>'''Separation of Vegetation from Roofing Details'''<br>Forming Part of Article 5.1.3.3.<br><small>(Click to expand)</small>
+| colspan="1"; style="text-align:center;width:550px;" | '''Figure 5.1.3.3.-A'''<br>'''Separation of Vegetation from Roofing Details'''<br>Forming Part of Article 5.1.3.3.<br><small>(Click to expand)</small>
 |-
 | [[File:VRA Standard Figure 5.1.3.3..png | link=https://rpm.rcabc.org/images/2/2d/VRA_Standard_Figure_5.1.3.3..png| 550 px]]