The Ontario Building Code | Masonry Veneer
9.20.6.4. masonry Veneer
(1) Except for masonry veneer where each masonry unit is supported individually by the structural backing, masonry veneer shall be of solid units not less than 70 mm thick.
(2) Veneer described in Sentence (1) over wood frame walls shall have not less than a 25 mm air space behind the veneer.
(3) masonry veneer less than 90 mm thick shall have unraked joints.
(4) masonry veneer shall conform to Subsection 4.3.2. where the masonry units are required to be individually supported by the structural backing.
In Plain Language
Masonry veneer, a decorative non-structural masonry layer over a wood-framed wall, must meet the requirements 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.