PVC Roof Systems Standard - Revision history

James Klassen: /* 13.1.3.4. Gauge, Dimension Limitations, and Seams */

2026-08-06T14:13:38Z

‎13.1.3.4. Gauge, Dimension Limitations, and Seams

James Klassen: /* 13.3.2.1. General Requirements for Linear Metal Flashing */

2026-07-31T22:39:49Z

‎13.3.2.1. General Requirements for Linear Metal Flashing

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

2026-07-31T22:36:24Z

‎10.3.2.3. General Application Requirements for Perimeters and Walls

James Klassen: /* 9.2.1.1. Membrane Composition, Thickness, and Selection */

2026-06-26T21:02:55Z

‎9.2.1.1. Membrane Composition, Thickness, and Selection

James Klassen at 18:40, 26 June 2026

2026-06-26T18:40:19Z

Show changes

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

2026-05-11T14:33:02Z

‎11.1.3.2. Roof Drain Function and Location

James Klassen: /* 11.2.1.3. Membrane Gutters and Gutter Liners */

2026-04-20T14:51:24Z

‎11.2.1.3. Membrane Gutters and Gutter Liners

James Klassen: /* 11.2.1.3. Membrane Gutters and Gutter Liners= */

2026-04-20T14:49:28Z

‎11.2.1.3. Membrane Gutters and Gutter Liners=

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

2026-04-10T21:01:55Z

‎3.1.3.2. Calculation of Specified Wind Loads

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

2026-03-31T16:37:36Z

‎3.1.3.2. Calculation of Specified Wind Loads

@@ Line 5,418: / Line 5,418: @@
 |  22+ || Butt Seams*
 |-
-|  rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | Up to 304.8 mm (12") || 2026-October-31 }} || rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | 2% || 2026-October-31 }} || 24 || rowspan="6" style="vertical-align:centre;text-align:center;"   | {{hilite | 3048 mm (12"),<br>as specified by a<br>''registered professional'' || 2026-October-31 }} || {{hilite | S-lock or Standing Seam<sup>†</sup> || 2026-October-31 }}
+|  rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | Up to 304.8 mm (12") || 2026-October-31 }} || rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | 2% || 2026-October-31 }} || 24 || rowspan="6" style="vertical-align:centre;text-align:center;"   | {{hilite | 3048 mm (120"),<br>as specified by a<br>''registered professional'' || 2026-October-31 }} || {{hilite | S-lock or Standing Seam<sup>†</sup> || 2026-October-31 }}
 |-
 |  22+ || {{hilite | Butt Seams* || 2026-October-31 }}

@@ Line 5,689: / Line 5,689: @@
 <li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
 <li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
 <li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
 </li></ol>
 {{strike| <li>Where hidden metal clips are required, they must

@@ Line 3,792: / Line 3,792: @@
 <li>{{hilite |When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination using|| 2021-October-30 }}
 <ol>
-<li>{{hilite | '''Option 1''' ({{hilite | '''Figure 10.3.2.3.-A''' || 2025-October-25 }}), in which the upper edges of fully adhered sheet membrane flashing plies shall be protected and secured with overlapping adhered or self-adhered ''wall'' membranes and exterior sheathing|| 2021-October-30 }},
+<li>{{hilite | '''Option 1''' ({{hilite | '''Figure 10.3.2.3.-A''' || 2025-October-25 }}), in which the upper edges of fully adhered sheet membrane flashing plies shall be protected and secured with overlapping adhered or self-adhered ''wall'' membranes and exterior cladding {{strike| sheathing || 2026-July-31 }}|| 2021-October-30 }},
 <li>'''Option 2''' ({{hilite | '''Figure 10.3.2.3.-B''' || 2025-October-25 }}), where the upper edges of fully adhered sheet membrane flashing plies must be {{hilite |sealed, and mechanically secured to the wall substrate, with a RoofStar-accepted reinforced liquid membrane flashing (Ref. [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4., "Liquid Membrane Flashing"]])|| 2021-October-30 }},
 <li>{{hilite | '''Option 3''' ({{hilite | '''Figure 10.3.2.3.-C''' || 2025-October-25 }}), where|| 2021-October-30 }}

@@ Line 3,083: / Line 3,083: @@
 |              rowspan="4" style="text-align:left;background-color:#4682B4"        |              <span style="color:#fff">PVC</span>
 |-
-|              rowspan="1" style="text-align:center;background-color:#FFA07A"             |    5             ||      rowspan="1" style="text-align:center;width=200px;"             |          1.270 (50)          ||    rowspan="1" style="text-align:center;width=200px;"             |       <span style="color:#d33">X</span>           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.270 (50)           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.270 (50)           ||  rowspan="1" style="text-align:center;width=200px;"             |         1.524 (60)        ||     rowspan="1" style="text-align:center;width=200px;"             |      1.270 (50)       || rowspan="1" style="text-align:center;width=200px;"             |       1.270 (50)         ||  rowspan="1" style="text-align:center;width=200px;"             |     1.524 (60)
+|              rowspan="1" style="text-align:center;background-color:#FFA07A"             |    5             ||      rowspan="1" style="text-align:center;width=200px;"             |          1.270 (50)          ||    rowspan="1" style="text-align:center;width=200px;"             |       <span style="color:#d33">X</span>           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.270 (50)           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.270 (50)           ||  rowspan="1" style="text-align:center;width=200px;"             |         1.524 (60)        ||     rowspan="1" style="text-align:center;width=200px;"             |      1.270 (50)       || rowspan="1" style="text-align:center;width=200px;"             |       1.270 (50)         ||  rowspan="1" style="text-align:center;width=200px;"             |     <span style="color:#d33">X</span>
 |-
-|              rowspan="1" style="text-align:center;background-color:#E9967A"            |    10           ||      rowspan="1" style="text-align:center;width=200px;"             |          1.524 (60)         ||    rowspan="1" style="text-align:center;width=200px;"             |       <span style="color:#d33">X</span>           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.524 (60)          ||   rowspan="1" style="text-align:center;width=200px;"             |        1.524 (60)            ||  rowspan="1" style="text-align:center;width=200px;"             |         1.524 (60)         ||     rowspan="1" style="text-align:center;width=200px;"             |      1.524 (60)       || rowspan="1" style="text-align:center;width=200px;"             |       1.524 (60)         ||  rowspan="1" style="text-align:center;width=200px;"             |    1.524 (60)
+|              rowspan="1" style="text-align:center;background-color:#E9967A"            |    10           ||      rowspan="1" style="text-align:center;width=200px;"             |          1.524 (60)         ||    rowspan="1" style="text-align:center;width=200px;"             |       <span style="color:#d33">X</span>           ||   rowspan="1" style="text-align:center;width=200px;"             |        1.524 (60)          ||   rowspan="1" style="text-align:center;width=200px;"             |        1.524 (60)            ||  rowspan="1" style="text-align:center;width=200px;"             |         1.524 (60)         ||     rowspan="1" style="text-align:center;width=200px;"             |      1.524 (60)       || rowspan="1" style="text-align:center;width=200px;"             |       1.524 (60)         ||  rowspan="1" style="text-align:center;width=200px;"             |    <span style="color:#d33">X</span>
 |-
 |              rowspan="1" style="text-align:center;background-color:#FA8072"             |    15           ||      rowspan="1" style="text-align:center;width=200px;"             |         <span style="color:#d33">X</span>           ||    rowspan="1" style="text-align:center;width=200px;"             |       <span style="color:#d33">X</span>            ||   rowspan="1" style="text-align:center;width=200px;"             |        2.032 (80)           ||   rowspan="1" style="text-align:center;width=200px;"             |        2.032 (80)           ||  rowspan="1" style="text-align:center;width=200px;"             |        2.032 (80)         ||     rowspan="1" style="text-align:center;width=200px;"             |      <span style="color:#d33">X</span>        || rowspan="1" style="text-align:center;width=200px;"             |       2.032 (80)         ||  rowspan="1" style="text-align:center;width=200px;"             |     <span style="color:#d33">X</span>

@@ Line 4,230: / Line 4,230: @@
 <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 4,415: / Line 4,415: @@
 </li></ol>
-===11.2.1.3. Membrane Gutters and Gutter Liners===
+====11.2.1.3. Membrane Gutters and Gutter Liners====
 <ol>

@@ Line 1,027: / Line 1,027: @@
 <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-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 PVC Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
 </li></ol>

@@ Line 1,069: / Line 1,069: @@
 <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>