The Ontario Building Code | Grade
9.26.9.2. Grade
(1) Western cedar shingles shall be not less than No. 2 grade.
(2) Eastern white cedar shingles shall be not less than B (clear) grade.
In Plain Language
Wood shingles or shakes must meet the grade requirements set out in this article, ensuring adequate quality and durability.
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.