Construction codes of Ontario

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Built-Up Roofs Aggregate Surfacing

Built-Up Roofs Aggregate Surfacing (1) Aggregate used for surfacing built-up roofs shall be clean, dry and durable and shall consist of particles of gravel, crushed stone or air-cooled blast furnace slag having a size of from 6 mm to 15 mm. (2) The minimum amount of aggregate surfacing per square metre of roof surface shall be 15 […]

Built-Up Roofs Quantity of Materials

Built-Up Roofs Quantity of Materials (1) The quantities of bituminous materials used on built-up roofs shall conform to Table 9.26.11.1. Article 9.26.11.1. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. Built-up Roofs Built-up roof coverings should be installed by specialized roofing installers. A built-up roof may have three or more […]

Built-Up Roofs Roof Felts

Built-Up Roofs Roof Felts (1) Bitumen roofing felts shall be not less than No.15 felt. Article 9.26.11.3. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. Note : Roofing felt or felt paper, also called underlayment or roofing tar paper, goes between the roof deck and the shingles. This additional layer […]

Built-up Wood Beams

Built-up Wood Beams (1) Where a beam is made up of individual pieces of lumber that are nailed together, the individual members shall be 38 mm or greater in thickness and installed on edge. (2) Except as permitted in Sentence (3), where individual members of a built-up beam are butted together to form a joint, the […]

Cant Strips

Cant Strips (1) Except as permitted in Sentence (4), a cant strip shall be provided at the edges of roofs. (2) No fewer than two plies of the roofing membrane shall be carried over the top of the cant strip. (3) Flashing shall extend over the top of the cant strip and be shaped to form […]

Cantilevered Floor Joists

Cantilevered Floor Joists (1) Floor joists supporting roof loads shall not be cantilevered more than 400 mm beyond their supports where 38 mm by 184 mm joists are used and not more than 600 mm beyond their supports where 38 mm by 235 mm or larger joists are used. (2) The cantilevered portions referred to in Sentence […]

Cap Flashing

Cap Flashing Parapet walls require a metal cap flashing to prevent water from penetrating from the top of the wall. Since a cap flashing sheds water, it must be sloped toward the roof to prevent staining of the exterior cladding. In addition, it cannot be made waterproof at the joints, and requires a secondary, continuous […]