Code Library › Volume 1 › Section 9.29 — Interior Wall and Ceiling Finishes
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.29.5.1.Application

(1) The requirements for application of gypsum board in this Subsection apply to the single layer application of gypsum board to wood furring or framing using nails or screws. (2) Except as provided in Sentence (3), gypsum board applications not described in this Subsection shall conform to CSA A82.31-M, “Gypsum Board Application.” (3) The application of gypsum board to flat insulating concrete form (ICF) walls shall conform to ASTM C840, “Standard Specification for Application and Finishing of Gypsum Board.” (See Note A-9.29.5.1.(3))
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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.