Roofing Materials Standards

(1)  Where materials used for the preparation of the substrate for roofing are covered in the scope of a standard listed in Table 9.26.2.1.A., they shall conform to that standard.

(2)  Where roofing materials are covered in the scope of a standard listed in Table 9.26.2.1.B., they shall conform to that standard.

Article 9.26.2.1. Ontario Regulation 332/12 Building Code,   O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for Ontario, 2021

Roof Coverings

The roof covering should be installed as soon as the sheathing is in place to keep the building dry and to provide durable, water-resistant protection.

The choice of roofing materials may be influenced by cost, appearance, local code requirements or local preferences. Asphalt shingles are commonly used on pitched roofs. Prefinished metal, galvanized steel or aluminum roofing is also common in some regions. At normal roof pitches, metal roofs will generally shed snow, a desirable characteristic in heavy snowfall areas. Roll roofing, wood shingles, hand-split shakes, sheet metal and concrete or clay tile are also used. Built-up roofing with a gravel topping or cap sheet is usually used for low-slope roofs.

Source : Canada Mortgage and Housing Corporation (CMHC)