(Draft) SBS Roof Systems Standard - Revision history

James Klassen: /* 3.1.3.2. Calculation of Specified Wind Loads */

2026-04-10T20:58:17Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 3.1.3.2. Calculation of Specified Wind Loads */

2026-04-10T20:54:25Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 10.3.4.1. Parapets */

2026-04-08T22:24:41Z

‎10.3.4.1. Parapets

James Klassen: /* 10.3.4.3. {{hilite | Tall Parapets || 2024-January-31 }} */

2026-04-08T22:19:03Z

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

James Klassen: /* 3.1.3.2. Calculation of Specified Wind Loads */

2026-03-31T16:38:19Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 9.3.2.1. Preparation of Substrate */

2026-03-27T16:34:12Z

‎9.3.2.1. Preparation of Substrate

James Klassen: /* 9.3.2.1. Preparation of Substrate */

2026-03-27T16:25:55Z

‎9.3.2.1. Preparation of Substrate

James Klassen: /* 1.1.3.3. Membrane Integrity Testing */

2026-03-19T18:43:27Z

‎1.1.3.3. Membrane Integrity Testing

James Klassen: /* 10.3.2.3. General Application Requirements for Perimeters and Walls */

2026-02-27T19:29:28Z

‎10.3.2.3. General Application Requirements for Perimeters and Walls

James Klassen: /* 9.3.2.3. General Requirements for Membrane Application */

2026-02-27T15:07:23Z

‎9.3.2.3. General Requirements for Membrane Application

@@ Line 1,058: / Line 1,058: @@
 <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-roof-calculators-internet-wind-rci "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
+<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-roof-calculators-internet-wind-rci Wind-Roof Calculators on the Internet (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>

@@ Line 1,058: / Line 1,058: @@
 <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 [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-roof-calculators-internet-wind-rci "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>

@@ Line 4,145: / Line 4,145: @@
 </li></ol>
 <li>{{hilite | Regardless of ''parapet'' height, no fewer than two plies of sheet membrane flashing shall be carried up the inside face of the ''parapet'' at least 203.2 mm (8") above the ''finished roof system surface''. || 2023-October-28 }}
-<li>{{strike| ''Tall parapets'' || 2022-October-28 }} {{hilite | A ''tall parapet'' (taller than 609.6 mm (24”), {{hilite | nominal || 2024-January-31 }}) || 2023-October-28 }}
+<li>{{strike| ''Tall parapets'' || 2022-October-28 }} {{hilite | A ''tall parapet'' (taller than 609.6 mm (24”) {{hilite | nominal || 2024-January-31 }}) || 2023-October-28 }} {{hilite | shall be waterproofed || 2023-October-28 }} in keeping with the requirements in [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]
-<ol>
+{{strike| {{hilite | must be waterproofed with at least one ply of base sheet membrane flashing applied continuously across the top face, extending down both the inside surface and the exterior face of the ''parapet'' by at least 50.8 mm (2”), as required in || 2023-October-28 }} [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]] || 2026-April-8 }}
-<li>{{hilite | shall be waterproofed || 2023-October-28 }} in keeping with the requirements in [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]], and
 <li>Where a ''parapet'' intersects with a higher wall, water must be directed {{strike| to the outer surface of the ''wall'' || 2025-October-22 }} {{hilite | away from the union and onto the roof surface (See '''Figures 10.3.4.1.-C''' '''through 10.3.4.1.-K''', below) by flashing the union with || 2026-October-31 }}
 <ol>

@@ Line 4,220: / Line 4,220: @@
 <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 {{strike| the roof || 2023-June-15 }} sheet membrane flashing installed to cover the top of a parapet by at least 50.8 mm (2"), {{hilite | and || 2024-June-15 }}
+<li>shall underlap {{strike| the roof || 2023-June-15 }} sheet membrane flashing installed to cover the top of a parapet by at least 50.8 mm (2"),
-{{strike| {{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 || 2023-June-15 }}
+<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>

@@ Line 1,098: / Line 1,098: @@
 <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 }}.
+<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>

@@ Line 3,289: / Line 3,289: @@
 <li>{{hilite | for any ''deck'' that cannot be repaired or otherwise made suitable for roofing. || 2023-June-16 }}
 </li></ol>
 <li>{{hilite | Substrates must be primed, if required by the ''manufacturer''. || 2023-June-16 }}
 <li>{{hilite | All plane transitions must be prepared or reinforced in the manner specified by the ''manufacturer''. || 2023-June-16 }}
@@ Line 3,305: / Line 3,304: @@
 <li>mechanically fastened or loose-laid membranes.
 </li></ol>
 <li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
 </li></ol>

@@ Line 3,286: / Line 3,286: @@
 <li>{{hilite | A properly secured, accepted overlay board is required || 2023-June-16 }} (Ref. [[#Part 5 - Deck and Wall Overlays | Part 5]])
 <ol>
-<li>{{hilite | for any ''deck'' that does not meet the deck fastening criteria set out in || 2023-June-16 }} [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]],
+<li>{{hilite | for any ''deck'' that does not meet the deck fastening criteria set out in || 2023-June-16 }} [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
-<li>{{hilite | for any ''deck'' that cannot be repaired or otherwise made suitable for roofing, || 2023-June-16 }} and
+<li>{{hilite | for any ''deck'' that cannot be repaired or otherwise made suitable for roofing. || 2023-June-16 }}
 </li></ol>
 <li>{{hilite | Substrates must be primed, if required by the ''manufacturer''. || 2023-June-16 }}
 <li>{{hilite | All plane transitions must be prepared or reinforced in the manner specified by the ''manufacturer''. || 2023-June-16 }}

@@ Line 293: / Line 293: @@
 <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>{{hilite | When the ''roof assembly'' supports a ''vegetated roof system'' covered by a '''''RoofStar Guarantee''''',|| 2025-October-25 }} <span class="recommended">{{hilite | an electrical current membrane integrity test is recommended but is not required|| 2025-October-25 }}</span>; {{hilite | however, when an integrity test is specified by the ''Design Authority'', it must be carried out 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 {{hilite | listed in [[Division_C | Division C]]|| 2021-October-30 }}.
 <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 SBS Standard#A-1.1.3.3.(5) Flood Testing | Note A-1.1.3.3.(5)]]).

@@ Line 4,025: / Line 4,025: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(1)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(1)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
 |-
 | [[File:SBS Figure 10.3.2.-A.png | link=https://rpm.rcabc.org/images/7/73/SBS_Figure_10.3.2.-A.png | 200 px]] || [[File:SBS Figure 10.3.2.-B.png | link=https://rpm.rcabc.org/images/7/7d/SBS_Figure_10.3.2.-B.png | 200 px]] || [[File:SBS Figure 10.3.2.-C.png | link=https://rpm.rcabc.org/images/a/a1/SBS_Figure_10.3.2.-C.png | 200 px]] || [[File:SBS Figure 10.3.2.-D.png | link=https://rpm.rcabc.org/images/3/35/SBS_Figure_10.3.2.-D.png | 200 px]] || [[File:SBS Figure 10.3.2.-E.png | link=https://rpm.rcabc.org/images/6/6a/SBS_Figure_10.3.2.-E.png | 200 px]]

@@ Line 3,320: / Line 3,320: @@
 <li><span class="principles">Membranes should be installed beginning at the lowest point of the roof</span>.
 <li>All membrane openings at eaves, walls, vents, etc. must be sealed during application to prevent moisture from entering the ''roof system'' or between membrane flashing plies.
 <li>Except for the application of picture-framing techniques (see [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]), both the base and cap membranes must be installed in a parallel direction (not perpendicular to each other).
 <li>Both the base and cap membranes of a 2-ply un-granulated (smooth) membrane ''system'' must be installed separately; installation "shingle fashion" (i.e., 50% lap) is not acceptable except where membrane "back nailing" is required.