The Ontario Building Code | Material Standards

9.27.9.1. 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".