Hot Rubber Roof Systems Standard - Revision history

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

2026-08-06T14:14:14Z

‎13.1.3.4. Gauge, Dimension Limitations, and Seams

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

2026-07-31T22:42:17Z

‎13.3.2.1. General Requirements for Linear Metal Flashing

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

2026-07-31T22:39:03Z

‎13.3.2.1. General Requirements for Linear Metal Flashing

James Klassen at 18:41, 26 June 2026

2026-06-26T18:41:18Z

Show changes

James Klassen: /* 12.3.2.8. Sealant Pockets */

2026-06-24T20:22:35Z

‎12.3.2.8. Sealant Pockets

James Klassen: /* 12.3.2.7. Railings, Ladders, and Other Attached Structures */

2026-06-24T19:03:10Z

‎12.3.2.7. Railings, Ladders, and Other Attached Structures

James Klassen: /* 13.3.2.4. Metal Edge Terminations */

2026-06-24T19:01:37Z

‎13.3.2.4. Metal Edge Terminations

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

2026-05-11T14:34:15Z

‎11.1.3.2. Roof Drain Function and Location

James Klassen: /* 14.1.3.13. Structures and Equipment */

2026-04-21T14:52:37Z

‎14.1.3.13. Structures and Equipment

James Klassen: /* 14.1.3.11. Wearing Surfaces */

2026-04-20T21:03:01Z

‎14.1.3.11. Wearing Surfaces

@@ Line 3,998: / Line 3,998: @@
 |  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 4,248: / Line 4,248: @@
 <ol>
 <li>{{hilite | RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications|| 2022-February-5 }}.
 <li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous membrane used as eave protection in a ''water-shedding roof system'').
 <li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' {{hilite | or their clips || 2024-January-31 }}

@@ Line 4,259: / Line 4,259: @@
 <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 3,889: / Line 3,889: @@
 </li></ol>
 <li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
 </li></ol>

@@ Line 3,889: / Line 3,889: @@
 </li></ol>
 <li>Railings, ladders, and other structures shall not direct water into a ''roof system'' by means of weep holes or the method of fastening.
 </li></ol>

@@ Line 4,509: / Line 4,509: @@
 </li></ol>
-====13.3.2.4. Metal Edge Terminations====
+====13.3.2.4. Reserved====
 ====13.3.2.5. Canted Edges====

@@ Line 2,964: / Line 2,964: @@
 <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>{{hilite | Wall membrane flashings must not terminate under the clamping ring of a cast drain || 2024-June-15 }}.

@@ Line 4,749: / Line 4,749: @@
 <li><span class="recommended">simplify removal of materials when membrane repairs are required</span>.
 </li></ol>
-<li>must take into account inevitable roof renewal (see [[Notes to Hot Rubber Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
+<li>{{hilite | must take into account inevitable roof renewal || 2023-June-16 }} (see [[Notes to SBS Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
 <li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, and
 <li>may be placed on an ''insulated roof system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]).
@@ Line 4,767: / Line 4,767: @@
 <li>at least 101.6 mm (4") in height above the drainage plane of the highest adjacent ''roof assembly'',
 <li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs), and
-<li>properly waterproofed around dowels in their final position, using
+<li>properly waterproofed around dowels {{hilite |in their final position, using|| 2021-February-7 }}
 <ol>
-<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
+<li>{{hilite | a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system|| 2021-February-7 }}, or
-<li>two cured coats of an Accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
+<li>{{hilite | two cured coats of an Accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]])|| 2021-February-7 }}.
 </li></ol>
 </li></ol>
 <li>When a structural planter adjoins a ''protected roof system'', the planter design must include
 <ol>
 <li>a plumbed mechanical drain {{hilite | conforming to the requirements for planter drains in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”] || 2025-October-25 }}, {{strike| inclusive of
@@ Line 4,782: / Line 4,780: @@
 <li>maintenance access, || 2024-October-29 }} or
 {{strike| </li></ol> || 2024-October-29 }}
 <li>When a structural planter adjoins an ''insulated roof system'', only a plumbed mechanical drain is permissible.
 <li><span class="recommended">A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features</span>.
@@ Line 4,787: / Line 4,787: @@
 <li>Drains, re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
 <li>When a leak detection system is specified, only non‐ferrous metal drains may be used.
 </li></ol>

@@ Line 4,695: / Line 4,695: @@
 <ol>
 <li>When a wearing surface is specified,
 <ol>