Code Library › Volume 1 › Section 9.27 — Cladding
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.27.8.2.Thickness

(1) Plywood cladding shall be not less than 6 mm thick when applied directly to sheathing. (2) When applied directly to framing or over furring strips, plywood cladding thickness shall conform to Table 9.27.8.2. (3) The thickness of grooved or textured plywood cladding shall be measured at the point of least thickness. Table 9.27.8.2. Minimum Plywood Cladding Thickness Forming Part of Sentences 9.27.8.2.(2) and 9.27.10.2.(2) Minimum Thickness, mm Spacing of Supports, mm Face Grain Parallel to Supports Face Grain at Right Angles to Supports 400 8 6 600 11 8

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

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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.