The Ontario Building Code | Required Weep Holes
188.8.131.52. 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
(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 184.108.40.206.