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

9.29.5.3.Maximum Spacing of Supports

(1) Maximum spacing of supports for gypsum board applied as a single layer shall conform to Table 9.29.5.3. Table 9.29.5.3. Spacing of Supports for Gypsum Board Forming Part of Sentence 9.29.5.3.(1) Maximum Spacing of Supports, mm o.c. Orientation of Board to Ceilings Thickness, mm Framing Walls Water-Based Painted Finish Texture Finish Gypsum board conforming to Sentence 9.29.5.2.(1) (except Sections 9 and 12 of ASTM C1396 / C1396M) parallel — — — 9.5 perpendicular 400 400 — parallel 600 400 — 12.7 perpendicular 600 600 400 parallel 600 400 — 15.9 perpendicular 600 600 600 Gypsum board conforming to Clause 9.29.5.2.(1)(b) (only Section 12 of ASTM C1396 / C1396M) parallel 600 400 — 12.7 perpendicular 600 600 600

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.