SBS Roof Systems Standard - Revision history

James Klassen: /* 10.1.6.2. Control Joints (Roof Dividers) */

2026-06-10T18:58:51Z

‎10.1.6.2. Control Joints (Roof Dividers)

James Klassen: /* 11.1.3.2. Roof Drain Function and Location */

2026-05-11T14:30:40Z

‎11.1.3.2. Roof Drain Function and Location

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

2026-04-10T20:57:02Z

‎3.1.3.2. Calculation of Specified Wind Loads

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

2026-04-10T20:52:27Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 10.3.4.1. Parapets */

2026-04-08T22:24:55Z

‎10.3.4.1. Parapets

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

2026-04-08T22:17:18Z

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

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

2026-04-08T15:09:44Z

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

James Klassen: /* 10.1.4.3. {{hilite | Tall Parapets || 2024-January-31 }} */

2026-04-08T14:45:43Z

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

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

2026-04-08T14:38:10Z

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

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

2026-03-31T16:35:11Z

‎3.1.3.2. Calculation of Specified Wind Loads

@@ Line 3,838: / Line 3,838: @@
 <li>sloped on the top face {{hilite | (this may be bi-directional, or only toward one side) || 2026-October-31 }},
 <li>{{hilite | enveloped with no fewer than two plies of sheet membrane flashing || 2026-October-31 }},
-<li>{{hilite | at least 127 mm (5”) in height, measured from the ''finished roof system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted) || 2026-October-31 }}, and
+<li>{{hilite | at least 127 mm (5”) in height, measured from the ''finished roof system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted)|| 2026-October-31 }}, and
-{{strike| {{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 || 2025-October-22 }}
+{{strike| {{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 || 2025-October-22}}
 <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>

@@ Line 4,551: / Line 4,551: @@
 <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 }}:
+<li>When {{hilite | a roof is replaced and || 2024-June-15 }} existing ''roof drains'' {{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><span class="principles">{{hilite | Specify sheet membrane flashing to seal in the drain to the field membrane (liquid membranes should be the last option) || 2024-June-15 }}</span>.

@@ Line 1,060: / Line 1,060: @@
 <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 1,060: / Line 1,060: @@
 <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 4,147: / Line 4,147: @@
 </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 4,222: / Line 4,222: @@
 <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 3,718: / Line 3,718: @@
 <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 | {{strike| the vertical || 2023-June-15 }} surfaces of the ''wall'' above the primary roof membrane flashing {{hilite | and including the coping, || 2024-June-15 }} 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>membranes {{strike| or water-resistive barrier materials || 2023-January-26 }} specified for {{strike| ''walls'' || 2023-January-26 }} {{hilite | {{strike| the vertical || 2023-June-15 }}all surfaces of the ''wall'' above the primary roof membrane flashing, {{hilite | including the coping, || 2024-June-15 }} 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>

@@ Line 1,100: / Line 1,100: @@
 <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>