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

9.10.17.11.Walls and Ceilings in Bathrooms

(1) The interior finish of walls and ceilings in bathrooms within suites of residential occupancy shall have a surface flame-spread rating of not more than 200.
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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.