Construction codes of Ontario

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Required Barrier to Vapour Diffusion

(1) Thermally insulated wall, ceiling and floor assemblies shall be constructed with a vapour barrier sufficient to prevent condensation in the wall spaces, floor spaces or attic or roof spaces. Article 9.25.4.1 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. A vapour Barrier is required for insulation installed between the […]

Required Insulation

Required Insulation (1) All walls, ceilings and floors separating heated space from unheated space, the exterior air or the exterior soil shall be provided with thermal insulation in conformance with Section 12.2. to prevent moisture condensation on their room side during the winter and to ensure comfortable conditions for the occupants. Article 9.25.2.1 Ontario Regulation 332/12 […]

Required Sealants

Required Sealants (1) Sealant shall be provided where required to prevent the entry of water into the structure. (2) Sealant shall be provided between masonry, siding or stucco and the adjacent door and window frames or trim, including sills unless such locations are completely protected from the entry of rain. (3) Sealant shall be provided at vertical […]

Required Sheathing Membrane and Installation

Required Sheathing Membrane and Installation (1) Except as provided in Articles 9.27.3.4. to 9.27.3.6., at least one layer of sheathing membrane shall be applied beneath siding, stucco or masonry veneer. (2) Sheathing membrane required in Sentence (1) shall be applied so that joints are lapped not less than 100 mm. (3) Where sheathing membrane required in Sentence (1) […]

Scellant Materials

Scellant Materials (1) Sealants shall be, (a) non-hardening types suitable for exterior use, (b) selected for their ability to resist the effects of weathering, and (c) compatible with, and adhere to, the substrate to which they are applied. (2) Sealants shall conform to, (a) ASTM C834, “Latex Sealants”, (b) ASTM C920, “Elastomeric […]

Sealants, Trim and Flashing

Sealants, Trim and Flashing (1) The sealing compound used to seal the glass component of an insulating glazing unit to the sash component shall be compatible with the sealing compound used to edge seal the glass component. (2) Flashing used to protect openings shall conform to Articles 9.27.3.7. and 9.27.3.8. (3) Sealants shall be applied between […]

Sheathing Membranes in Lieu of Sheathing

Sheathing Membranes in Lieu of Sheathing (1) Except as provided in Article 9.27.3.6., where no sheathing is used, at least two layers of sheathing membrane shall be applied beneath the cladding. (2) All joints in the sheathing membrane required in Sentence (1) shall occur over framing, and the membrane shall be fastened to the framing with roofing […]