The Ontario Building Code | Surface Protection
3.7.4.12. surface Protection
(1) wall and floor surfaces below the uppermost surfaces of urinals shall be protected from deterioration by impervious and durable material for a distance from the urinal to a point not less than 900 mm from the projected outline of the urinal on to the wall or floor.
(2) floor surfaces around a water closet shall be protected from deterioration by impervious and durable material for a distance not less than 900 mm from the projected outline of the water closet on to the floor.
In Plain Language
Wall and floor surfaces near urinals and around water closets must be protected with impervious, durable material for a set distance, since these areas are prone to moisture damage and deterioration over time.
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.