The Ontario Building Code | Materials
9.27.6.1. Materials
(1) Lumber siding shall be sound, free of knot holes, loose knots, through checks or splits.
In Plain Language
Materials for this specific cladding type must conform to the standards referenced in this article.
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.