The Ontario Building Code | Intersection of Built-Up Roofs and Walls other than Masonry
9.26.4.7. Intersection of Built-Up Roofs and walls other than masonry
(1) The intersection of built-up roofs with walls clad with other than masonry shall have a cant strip at the intersection.
(2) The roofing membrane shall be mopped over the cant strip referred to in Sentence (1).
(3) Flashing plies shall extend not less than 150 mm up the wall referred to in Sentence (1) behind the sheathing paper.
In Plain Language
Where a built-up roof intersects a wall other than masonry, this article sets out the specific flashing requirements for that transition.
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.