Construction codes of Ontario

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Vent Requirements

Vent Requirements (1) Except as provided in Sentence (2), the unobstructed vent area shall be not less than 1/300 of the insulated ceiling area. (2) Where the roof slope is less than 1 in 6 or in roofs that are constructed with roof joists, the unobstructed vent area shall be not less than 1/150 of […]

Ventilation of Unheated Crawl Spaces

Ventilation of Unheated Crawl Spaces (1) Unheated crawl spaces shall be ventilated by natural or mechanical means. (2) Where an unheated crawl space is ventilated by natural means, ventilation shall be provided to the outside air by not less than 0.1 m² of unobstructed vent area for every 50 m² of floor area. (3) Vents shall […]

Venting Clearances (attic)

Venting Clearances (attic) (1) Except as provided in Sentence (2), where venting is provided to a roof joist space, not less than 63 mm of space shall be provided between the top of the insulation and the underside of the roof sheathing. (2) Where venting is provided at the junction of sloped roofs and exterior walls […]

Wall Stud Size and Spacing

Wall Stud Size and Spacing (1) Except as provided in Sentence (2), the size and spacing of studs shall conform to Table 9.23.10.1. (2) Studs for walls not listed in Table 9.23.10.1. and supporting roof loads shall conform to Tables A-30 to A-33, provided, (a) the studs are clad with not less than 9.5 mm thick […]

Wall Studs

Wall Studs (1) Wall studs shall not be notched, drilled or otherwise damaged so that the undamaged portion of the stud is less than two-thirds the depth of the stud if the stud is loadbearing or 40 mm if the stud is non-loadbearing, unless the weakened studs are suitably reinforced. Article 9.23.5.3. Ontario Regulation 332/12 Building […]

Winders

(1) Stairs within dwelling units are permitted to contain winders that converge to a centre point provided, (a) the winders turn through an angle of not more than 90°, (b) individual treads turn through an angle of not less than 30° or not more than 45°, and (c) adjacent winders turn through the […]

Window Performance

Window Performance Several technological advances have vastly improved the performance of windows over the past 20 years. Multiple Glass Layers Condensation on interior window surfaces can be reduced by installing energy-efficient windows, using efficient glazing and low-conductivity frames. Each layer of glass and air space works to increase the inside surface temperature of the innermost […]