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.
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.
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