(Draft) ASM Roof Systems Standard - Revision history

James Klassen: /* 8.2.1.5. Ventilation Materials */

2026-02-13T18:47:22Z

‎8.2.1.5. Ventilation Materials

James Klassen: /* 9.3.2.8. Curved Panels */

2026-02-03T18:28:15Z

‎9.3.2.8. Curved Panels

James Klassen at 18:19, 30 January 2026

2026-01-30T18:19:37Z

James Klassen at 16:41, 28 January 2026

2026-01-28T16:41:32Z

James Klassen: /* 8.1.3.4. Separation Between Materials */

2026-01-28T16:10:50Z

‎8.1.3.4. Separation Between Materials

James Klassen: /* 7.1.3.4. {{strike| Effective || 2026-January-31 }} Thermal Resistance and Layering */

2026-01-28T15:54:16Z

‎7.1.3.4. {{strike| Effective || 2026-January-31 }} Thermal Resistance and Layering

James Klassen: /* 11.1.4.2. Scuppers and Overflows */

2026-01-28T15:45:59Z

‎11.1.4.2. Scuppers and Overflows

James Klassen: /* 11.1.3.1. Principles of Design */

2026-01-28T15:35:20Z

‎11.1.3.1. Principles of Design

James Klassen: /* 12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }} */

2026-01-27T23:29:51Z

‎12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}

James Klassen: /* 12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }} */

2026-01-27T23:28:41Z

‎12.3.2.1. General Requirements for Flashing Penetrations {{hilite | and Vents|| 2026-February-1 }}

@@ Line 1,960: / Line 1,960: @@
 <li>{{hilite | provide open space between the filaments to promote air movement|| 2026-February-1 }},
 <li>{{hilite | be at least 6.35 mm (1/4") thick|| 2021-October-30 }}, and
-<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]])|| 2021-October-30 }}.
+<li>{{hilite | {{hilite | be|| 2026-February-1 }} capable of supporting the weight of the roof system, together with its anticipated live loads (See [[#3.1.3.4. Resistance to Other Loads | Article 3.1.3.4.]])|| 2021-October-30 }}.
 </li></ol>
 <li>{{hilite | Entangled mesh products shall not have any factory-bonded geotextile fabrics, felts, or other materials|| 2026-February-1 }}.

@@ Line 2,532: / Line 2,532: @@
 ====9.3.2.7. Reserved====
 ====9.3.2.8. Curved Panels====
-(See Article 9.1.3.4.)
+(See [[#9.1.3.4._Curved_Panel_Systems | Article 9.1.3.4.]])
 <ol>

@@ Line 4,411: / Line 4,411: @@
-[[Main Page | <i class="fa fa-home fa"></i> Home]]
+[[RCABC Roofing Practices Manual | <i class="fa fa-home fa"></i> Home]]
 </div>
 {{Template:RPM Page Footer with Copyright and Current Date}}

@@ Line 77: / Line 77: @@
 <div style="text-align:center">
 '''First Edition''': June 14, 2018
-<br>'''Previous Edition''': January 31, 2025
+<br>'''Previous Edition''': June 12, 2025
-<br>'''Current Edition''': Adopted June 12, 2025
+<br>'''Current Edition''': Adopted January 20, 2026
 <br><br>
-All changes to this Standard are effective<br><big>'''July 1, 2025'''</big>
+All changes to this Standard are effective<br><big>'''February 1, 2026'''</big>
 </div>
 <div style="text-align:center">

@@ Line 1,857: / Line 1,857: @@
 </li></ol>
-====8.1.3.4. Separation Between Materials====
+====8.1.3.4. Separation Layer Between Materials====
 <ol>
-<li>A separation material is required
+<li>A separation layer {{strike| material || 2026-January-28 }} is required
 <ol>
 <li>{{hilite |when metal panels or flashings come in direct contact with any bituminous ''underlayments'' manufactured without a bond-breaking top face|| 2021-June-30 }}, or

@@ Line 1,587: / Line 1,587: @@
 </li></ol>
-====7.1.3.4. {{strike| Effective || 2026-January-31 }} Thermal Resistance and Layering====
+====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
 (See [[Notes to ASM Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

@@ Line 3,112: / Line 3,112: @@
 <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">A {{hilite | ''scupper drain'' may be used|| 2027-February-1 }} {{strike| serve either || 2026-January-28 }} as a ''primary roof drain'', {{strike| or as || 2026-January-28 }} a ''secondary drain'', {{hilite | or as an ''overflow''|| 2027-February-1 }}.</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>''Overflow'' drains are required for membrane gutters, and when they are specified, they must be

@@ Line 3,067: / Line 3,067: @@
 <li>{{hilite | The ''roof assembly'' must be designed to drain or shed all water, including any liquid water that may find its way inside the ''roof system'', at or on the underlayment (Ref. || 2023-October-28 }} [[#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]]).
 <li>The ''Design Authority'' is responsible for the design of roof drainage.
-<li>{{hilite |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|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }}.
+<li>{{hilite | Whereas the Building Code may not require the inclusion of overflows in all circumstances, and the RGC Standards require overflows in some locations (e.g., in membrane-lined gutters),|| 2027-February-1 }} <span class="recommended">{{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }}</span> {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
 <li>Membrane gutters must be designed for their anticipated capacity, with consideration given to
 <ol>

@@ Line 3,725: / Line 3,725: @@
 <li>{{hilite | 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|| 2020-July-3 }}.
 <li>{{hilite | When two storm collars for one penetration are specified, the collars must be approximately 25.4 mm (1”) apart, and each must be independently sealed|| 2021-June-30 }}.
-<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See|| 2026-February-1 }} [[#12.3.2.4. Curbs and Sleepers | {{hilite | Article 12.3.2.4.|| 2026-February-1 }}]] {{hilite | for curb requirements)|| 2026-February-1 }}.
+<li>{{hilite | Vents with square or rectangular shaped bases shall be installed on curbs situated on a split pan (See [[#12.3.2.4. Curbs and Sleepers | Article 12.3.2.4.]] for curb requirements)|| 2026-February-1 }}.
 <li>Cable and horizontal pipe penetrations must be flashed with
 <ol>

@@ Line 3,702: / Line 3,702: @@
 <li>the flexible boot flashing
 <ol>
-<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-January-27 }},
+<li>is located so as not to interfere with standing seams or panel ribs (if interference is unavoidable, incorporate the raised {{strike| panel || 2026-January-27 }}{{hilite | curb detail utilizing a split panel)|| 2027-February-1 }},
 <li>is oriented diagonally to promote drainage around the flashing base {{hilite | and permits at least 12.7 mm (1/2") drainage past the corners|| 2021-October-30 }} {{hilite | (see the construction detail in|| 2026-February-1 }} [[Division D]]),
 <li>is {{hilite | embedded|| 2026-February-1 }} in a continuous bead of untooled sealant,