The Ontario Building Code | Roof Considered as a Wall
3.2.1.3. Roof Considered as a wall
(1) For the purposes of this Section any part of a roof that is pitched at an angle of 60° or more to the horizontal and is adjacent to a space intended for occupancy within a building shall be considered as part of an exterior wall of the building.
In Plain Language
Any part of a roof pitched 60° or steeper next to occupied space is treated as an exterior wall for the purposes of this Section, rather than as a roof.
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.