The Ontario Building Code | Cladding
3.1.4.8. Cladding
(1) Except as permitted by Sentence 3.2.3.7.(6), cladding for a buildingwithin the scope of Article 3.2.2.43A. or 3.2.2.50A. that exceeds 4 storeys in building height or cladding for a fire compartment in such a building shall be noncombustible.
In Plain Language
For taller buildings within the scope of Articles 3.2.2.43A or 3.2.2.50A (generally exceeding 4 storeys), this clause requires exterior cladding, and cladding on relevant fire compartments, to be noncombustible, with one specific exception carved out elsewhere.
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.