Code Library › Volume 1 › Section 3.1 — General
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.1.14.1.Fire-Retardant-Treated Wood Roof Systems

(1) If a fire-retardant-treated wood roof system is used to comply with the requirements of Subsection 3.2.2., the roof deck assembly shall meet the conditions of acceptance of CAN/ULC-S126, “Standard Method of Test for Fire Spread Under Roof-Deck Assemblies.” (2) Supports for the roof deck assembly referred to in Sentence (1) shall consist of (a) fire-retardant-treated wood, (b) heavy timber construction, (c) noncombustible construction, or (d) a combination thereof.
← Previous3.1.13.12. Encapsulated Mass Timber ConstructionNext →3.1.14.2. Metal Roof Deck Assemblies

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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.