The Ontario Building Code | Coverage
9.26.8.1. Coverage
(1) Except for the first two courses, coverage shall be not less than three thicknesses of shingle over the entire roof, disregarding cutouts.
In Plain Language
Coverage requirements for this alternative shingle type are set out in this article, similar in purpose to the general asphalt shingle coverage rule.
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.