Construction codes of Ontario

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Vapour Barrier Materials

Vapour Barrier Materials (1) Vapour barriers shall have a permeance not greater than 60 ng/(Pa∙s∙m2), measured in accordance with ASTM E96 / E96M, “Water Vapor Transmission of Materials”, using the desiccant method (dry cup). (2) Where the intended use of the interior space will result in high moisture generation, the assembly shall be designed according to […]

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 Installation

Window Installation Windows are usually installed after the house framing and roof covering have been completed. Windows should arrive just in time for installation. If they are delivered early, store them upright in a secure, dry and level area in their original packaging with any temporary bracing left in place. Screens are susceptible to damage […]

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 […]

Windows airtightness, water resistance and wind load

Windows airtightness, water resistance and wind load Windows, doors and skylights provide environmental separation (resistance to water entry, thermal resistance and airtightness), perform a structural function by resisting wind loads, offer stability under operational loads and withstand forced entry. Windows, doors and skylights in Canada are expected to conform to the Harmonized Standard NAFS—North American […]