Roof Sheating Edge Support (1)  Except as permitted in Sentence (2), where panel-type roof sheathing requires edge support, the support shall consist of,     (a)   metal H clips, or     (b)   not less than 38 mm by 38 mm blocking securely nailed between framing members. (2)  The supports referred to in Sentence (1) are not required when […]

Roof space ventilation Always provide adequate ventilation of the roof space above the insulation. Accumulated water vapour in attic spaces and under low-slope roofs could condense during cold weather in sufficient quantity to cause damage. Since most types of roof membranes are highly resistant to vapour transmission, vapour does not pass through them and ventilation […]

Roof Trusses (1)  Roof truss members shall not be notched, drilled or otherwise weakened unless such notching or drilling is allowed for in the design of the truss. Article 9.23.5.5. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Roofing Materials Standards (1)  Where materials used for the preparation of the substrate for roofing are covered in the scope of a standard listed in Table 9.26.2.1.A., they shall conform to that standard. (2)  Where roofing materials are covered in the scope of a standard listed in Table 9.26.2.1.B., they shall conform to that standard. Article 9.26.2.1. […]

Roofing Materials Types of Covering Forming Part of Sentence 9.26.2.1.(2) Table 9.26.2.1.B. Notes to Table 9.26.2.1.B.: (1) For the purpose of this Subsection, ASTM D3019, “Lap Cement Used with Asphalt Roll Roofing, Non-Fibered, Asbestos-Fibered, and Non-Asbestos-Fibered”, applies only with respect to non-fibered and non-asbestos-fibered (Types I and III) asphalt roll roofing. Table 9.26.2.1B. Ontario Regulation 332/12 […]

Roofing Nails (1)  Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to,     (a)   ASTM F1667, “Driven Fasteners: Nails, Spikes, and Staples”, or     (b)   CSA B111, “Wire Nails, Spikes and Staples”.     (2)  Nails shall have sufficient length to penetrate through or 12 mm into roof sheathing.     (3)  Nails used with asphalt […]