PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.26.2.1.Material Standards
(1) Where materials used for the preparation of the substrate for roofing are covered in the scope of a standard listed in
Table 9.26.2.1.-A, they shall conform to that standard.
(2) Where roofing materials are covered in the scope of a standard listed in Table 9.26.2.1.-B, they shall conform to that
standard.
Table 9.26.2.1.-A
Materials for Preparation of the Substrate for Roofing
Forming Part of Sentence 9.26.2.1.(1)
Type of Material Standards
Sheathing Membranes CAN/CGSB-51.32-M, “Sheathing, Membrane, Breather Type”
Primers CGSB 37-GP-9Ma, “Primer, Asphalt, Unfilled, for Asphalt Roofing, Dampproofing and Waterproofing”
Table 9.26.2.1.-B
Roofing Materials
Forming Part of Sentence 9.26.2.1.(2)
Type of Roof Covering Standards
ASTM D3019 / D3019M, “Standard Specification for Lap Cement Used with Asphalt Roll Roofing,
Non-Fibered and Fibered” (1)
ASTM D4479 / D 4479M, “Standard Specification for Asphalt Roof Coatings - Asbestos-Free”
CAN/CGSB-37.50-M, “Hot-Applied, Rubberized Asphalt for Roofing and Waterproofing”
CGSB 37-GP-56M, “Membrane, Modified, Bituminous, Prefabricated, and Reinforced for Roofing”
Built-up roofing (BUR) CAN/CSA-A123.2, “Asphalt-Coated Roofing Sheets”
CSA A123.3, “Asphalt Saturated Organic Roofing Felt”
CAN/CSA-A123.4, “Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems”
CSA A123.17, “Asphalt Glass Felt Used in Roofing and Waterproofing”
CSA A123.23, “Product specification for polymer-modified bitumen sheet, prefabricated and
reinforced”
ASTM D4637 / D4637M, “Standard Specification for EPDM Sheet Used In Single-Ply Roof
Membrane”
ASTM D4811 / D4811M, “Standard Specification for Nonvulcanized (Uncured) Rubber Sheet Used
as Roof Flashing”
Single-ply membranes ASTM D6878 / D6878M, “Standard Specification for Thermoplastic Polyolefin Based Sheet Roofing”
CAN/CGSB-37.54, “Polyvinyl Chloride Roofing and Waterproofing Membrane”
CAN/CGSB-37.58-M, “Membrane, Elastomeric, Cold-Applied Liquid, for Non-
Exposed Use in Roofing and Waterproofing”
CSA A123.5, “Asphalt shingles made from glass felt and surfaced with mineral granules”
CAN/CSA-A220 Series, “Concrete Roof Tiles”
Shingles, shakes, tiles, panels
CSA O118.1, “Western Red Cedar Shakes and Shingles”
CSA O118.2, “Eastern White Cedar Shingles”
CAN/CSA-A123.16, “Asphalt-coated glass-base sheets”
Eave protection CSA A123.22, “Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing
Underlayment for Ice Dam Protection”
ASTM D4811 / D4811M, “Standard Specification for Nonvulcanized (Uncured) Rubber Sheet Used
Flashing
as Roof Flashing”
Notes to Table 9.26.2.1.-B:
(1) For the purpose of this Subsection, ASTM D3019 / D3019M shall only apply to the non-fibered and non-asbestos-fibered types (I and
III) of asphalt roll roofing.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.