Construction codes of Ontario

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Total Ventilation Capacity

(1) The minimum total ventilation capacity of the ventilation system required in Clause 9.32.3.2.(1)(b) shall be the sum of the individual room capacities given in Table 9.32.3.3. Table 9.32.3.3.Ventilation Capacity Forming Part of Sentence 9.32.3.3.(1) Notes to Table 9.32.3.3.: (1) At least one bedroom in each dwelling unit shall be designated as the master bedroom. (2) Ventilation capacities […]

Traps

Traps (1) Except as provided for in Sentence (2), every trap shall, (a) have a trap seal depth of at least 38 mm, (b) be so designed that failure of the seal walls will cause exterior leakage, and (c) have a water seal that does not depend on the action of moving parts. […]

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 […]

Vapour Diffusion Control

Vapour Diffusion Control Water vapour can migrate through building envelope assemblies by penetrating through materials by ‘diffusion’. Many activities such as cooking, dishwashing, laundering and bathing release considerable amounts of water vapour into the air and increase its humidity. As water vapour diffuses through assemblies, it can condense on cold surfaces such as the inside […]

Ventilation of Rooms and Spaces

Ventilation of Rooms and Spaces, (1) Except as permitted in Sentence (2), rooms or spaces in a residential occupancy shall be ventilated by natural means in accordance with Subsection 9.32.2. (2) The natural ventilation of rooms or spaces required in Sentence (1) may be provided by mechanical means. (3) Where a room or space is not provided with […]

Venting of Laundry-Drying Equipment

Venting of Laundry-Drying Equipment (1) Exhaust ducts or vents connected to laundry-drying equipment shall discharge directly to the outdoors. (2) Exhaust ducts connected to laundry-drying equipment shall be, (a) independent of other exhaust ducts, (b) accessible for cleaning, and (c) constructed of a smooth corrosion-resistant material. (3) Where collective venting of multiple installations […]

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 […]