Construction codes of Ontario

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Installation of Vapour Barriers

Installation of Vapour Barriers (1) Products installed to function as the vapour barrier shall protect the warm side of wall, ceiling and floor assemblies. (2) Where different products are used for the vapour barrier and the insulation, the vapour barrier shall be installed sufficiently close to the warm side of the insulation to prevent condensation at design […]

Insulation Materials

Insulation Materials (1) Except as required in Sentence (2), thermal insulation shall conform to the requirements of, (a) ASTM C726, “Mineral Wool Roof Insulation Board,” (b) CAN/CGSB-51.25-M, “Thermal Insulation, Phenolic, Faced”, (c) CGSB 51-GP-27M, “Thermal Insulation, Polystyrene, Loose Fill”, (d) CAN/ULC-S701.1, “Thermal Insulation, Polystyrene Boards”, (e) CAN/ULC-S702 “Mineral Fibre Thermal Insulation […]

Insulation, Air Barrier System and Vapour Barrier

Insulation, Air Barrier System and Vapour Barrier Insulation, vapour barriers and air barrier systems may be installed at the same time as exterior finishes, provided the insulated assembly is protected against moisture damage such as that caused by wind driven rain. This stage requires a few days to complete and requires careful fitting and sealing […]

Interior Finish Description

(1) Interior finish material shall include any material that forms part of the interior surface of a floor, wall, partition or ceiling, including, (a) interior cladding of plaster, wood or tile, (b) surfacing of fabric, paint, plastic, veneer or wallpaper, (c) doors, windows and trim, (d) lighting elements, such as light diffusers […]

Interior Wall and Ceiling Finishes

Interior Wall and Ceiling Finishes Gypsum board (drywall) is the most common interior finish in Canadian houses. In addition to providing a smooth, paintable surface, gypsum board provides a degree of fire resistance to lightweight structural framing, allowing walls and floors to remain in place to provide some time for occupants to become aware of […]

Joints in Top Plates

Joints in Top Plates (1) Joints in the top plates of loadbearing walls shall be staggered not less than one stud spacing. (2) The top plates in loadbearing walls shall be lapped or otherwise suitably tied at corners and intersecting walls in accordance with Sentence (4). (3) Joints in single top plates used with loadbearing walls […]

Joints Offset Panel-Type Underlay

Joints Offset Panel-Type Underlay (1) Where panel-type underlay is required to be installed over plywood, or OSB or waferboard, the joints in the underlay shall be offset at least 200 mm from the joints in the underlying subfloor. Article 9.30.2.4 Ontario Regulation 332/12 Building Code, O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for […]