The Ontario Building Code | Flashing for Weep Holes in Masonry Veneer
184.108.40.206. Flashing for Weep Holes in masonry Veneer
(2) Flashing beneath weep holes in masonry veneer over wood frame walls shall be installed so that it extends from a point not less than 5 mm beyond the outer face of thebuilding element below the flashing to a point 150 mm up the wood frame wall.
(3) Where the frame wall is sheathed with a sheathing membrane, a non-wood-based rigid exterior insulating sheathing or a semi-rigid insulating sheathing with an integral sheathing membrane, the flashing shall be installed behind the sheathing membrane or insulating sheathing.
(4) Flashing described in Sentence (2) is permitted to conform to the requirements for concealed flashing in Table 220.127.116.11.