Code Library › Volume 1 › Section 9.26 — Roofing
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.26.5.2.Materials

(1) Eave protection shall be laid beneath the starter strip and shall consist of (a) No. 15 asphalt-saturated felt laid in two plies lapped 480 mm and cemented together with lap cement, (b) Type M or S roll roofing laid with not less than 100 mm head and end laps cemented together with lap cement, (c) glass fibre or polyester fibre coated base sheets, or (d) self-sealing composite membranes consisting of modified bituminous coated material.
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What is the minimum roof slope for asphalt shingles and other roofing materials in Ontario?Where is ice and water shield (eave protection) required on roofs in Ontario?What are the roof flashing requirements for valleys, walls and chimneys in Ontario?

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.