Construction codes of Ontario

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Subflooring Material Standards

Subflooring Material Standards (1) Except as provided in Sentence (2), wood-based panels for subfloors shall conform to, (a) CSA O121, “Douglas Fir Plywood”, (b) CSA O151, “Canadian Softwood Plywood”, (c) CSA O153, “Poplar Plywood”, (d) CSA O325, “Construction Sheathing”, or (e) CSA O437.0, “OSB and Waferboard”. (2) Particleboard subflooring may be […]

Subflooring Required

Subflooring Required (1) Subflooring shall be provided beneath finish flooring where the finish flooring does not have adequate strength to support the design loads. Article 9.23.14.1.Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Supplemental Exhaust

Supplemental Exhaust (1) Additional supplemental exhaust capacity shall be installed as necessary so that the total capacity of all kitchen, bathroom, water closet room and other supplemental exhaust air intakes is not less than the total ventilation capacity, as required in Article 9.32.3.3., minus the principal exhaust fan capacity, as required in Article 9.32.3.4. (2) An […]

Support for Cladding Materials

Support for Cladding Materials (1) Corners and intersections shall be designed to provide adequate support for the vertical edges of interior finishes, sheathing and cladding materials, and in no instance shall exterior corners be framed with less than the equivalent of two studs. Article 9.23.10.5. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for […]

Support of Floors

Support of Floors on-ground (1) Material that is susceptible to changes in volume due to variations in moisture content or chemical-microbiological oxidation shall not be used as fill beneath floors-on-ground in a concentration that will damage the building to a degree that would adversely affect its stability or the performance of assemblies separating dissimilar environments. […]

Support of Walls

Support of Walls (1) Non-loadbearing walls parallel to the floor joists shall be supported by joists beneath the wall or on blocking between the joists. (2) Blocking referred to in Sentence (1) for the support of non-loadbearing walls shall be not less than 38 mm by 89 mm lumber, spaced not more than 1.2 m apart. […]

Surface Defects Underlay

Surface Defects Underlay (1) Underlay beneath resilient or ceramic floors applied with an adhesive shall have all holes or open defects on the surface patched so that the defects will not be transmitted to the finished surface. Article 9.30.2.5 Ontario Regulation 332/12 Building Code, O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for Ontario, […]