The Ontario Building Code | Where Required
9.29.2.1. Where Required
(1) waterproof finish shall be provided to a height of not less than,
(a) 1 800 mm above the floor in shower stalls,
(b) 1 200 mm above the rims of bathtubs equipped with showers, and
(c) 400 mm above the rims of bathtubs not equipped with showers.
In Plain Language
This interior finish or backing material is required under the conditions set out in this article.
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.