The Ontario Building Code | Required Weep Holes
9.20.13.8. Required Weep Holes
(1) Weep holes spaced not more than 800 mm apart shall be provided at the bottom of,
(a) cavities in cavity walls, and
(b) cavities or air spaces in masonry veneer walls.
(2) The cavities or air spaces described in Sentence (1) shall include those above lintels over window and door openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings required to be flashed in conformance with Article 9.20.13.3.
(3) The weep holes required in Sentence (1) shall be in a location such that any water that collects in the cavity or space will be directed to the exterior of the building.
In Plain Language
Weep holes, small gaps that let moisture drain from behind masonry veneer, are required at the spacing and locations 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.