Hardboard Cladding Material Standards (1)  Factory-finished hardboard cladding shall conform to CAN/CGSB-11.5M, “Hardboard, Precoated, Factory-Finished, for Exterior Cladding”. (2)  Hardboard cladding that is not factory finished shall conform to Types 1, 2 or 5 in CAN/CGSB-11.3-M, “Hardboard”. Article 9.27.9.1. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only

Hardboard Clearance (1)  Not less than 3 mm clearance shall be provided between hardboard siding and door or window frames Article 9.27.9.5 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only

Hardboard Materials Thickness (1)  Type 1 or 2 hardboard cladding shall be not less than,     (a)   6.0 mm thick when applied over sheathing that provides continuous support, and     (b)   7.5 mm thick when applied to furring or framing members not more than 406 mm o.c.     (2)  Type 5 hardboard cladding shall be not less […]

Hardboard Panels as exterior cladding Hardboard is also produced in sheets with a variety of finishes and may be applied over sheathing or to unsheathed walls if a rainscreen is not required. The minimum thickness of sheets should be at least 6 mm (1⁄4 in.) for supports that are not more than 400 mm (16 […]

Hardboard Siding Hardboard horizontal siding (Figure 110) is made in a wide range of colours. It often has splines for interlocking the panels and is installed in a manner similar to metal and vinyl siding. Some manufacturers require that their hardboard siding be installed over furring. Figure 110 Oncodes.ca publishes this information for educational purposes […]

Joints to be Offset or Reinforced (1)  Vertical joints in adjacent masonry courses shall be offset unless each wythe of masonry is reinforced with the equivalent of no fewer than two corrosion-resistant steel bars of 3.76 mm diam placed in the horizontal joints at vertical intervals not exceeding 460 mm. (2)  Where joints in the reinforcing referred […]