The Ontario Building Code | Adhesives
9.29.10.3. Adhesives
(1) Adhesives to attach ceramic and plastic tile shall be applied to the finish coat or brown coat of plaster that has been steel-trowelled to an even surface or to gypsum board or to masonry provided the masonry has an even surface.
In Plain Language
Adhesives used for tile installation must conform to the standards referenced in this article, an alternative to a mortar base for setting tile.
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.