Code Library › Volume 1 › Section 9.10 — Fire Protection
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.10.17.1.Flame-Spread Rating of Interior Surfaces

(1) Except as otherwise provided in this Subsection, the exposed surface of every interior wall and ceiling, including skylights and glazing, shall have a surface flame-spread rating of not more than 150. (2) Except as permitted in Sentence (3), doors need not conform to Sentence (1) provided they have a surface flame- spread rating of not more than 200. (3) Doors within dwelling units, other than garage doors, need not conform to Sentences (1) and (2).
← Previous9.10.16.4. Penetration of Fire BlocksNext →9.10.17.2. Ceilings in Exits or Public Corridors

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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.