The Ontario Building Code | Combustible Materials Permitted
3.1.4.1. Combustible Materials Permitted
(1) Except as required by this Part, a buildingpermitted to be of combustible construction is permitted to be constructed of combustible materials, with or without noncombustible components.
In Plain Language
Except where this Part specifically requires otherwise, this clause permits combustible materials generally to be used in construction, establishing combustible construction as the default baseline before the more specific restrictions and exceptions elsewhere in this Subsection apply.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.