The Ontario Building Code | Material Standards
9.27.8.1. Material Standards
(1) Plywood cladding shall be exterior type conforming to,
(a) CSA O115-M, "Hardwood and Decorative Plywood",
(b) CSA O121, "Douglas Fir Plywood",
(c) CSA O151, "Canadian Softwood Plywood", or
(d) CSA O153-M, "Poplar Plywood".
In Plain Language
Material standards for this cladding type are set out in this article, ensuring consistent quality and weather performance.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.