The Ontario Building Code | Required Insulation
9.25.2.1. Required insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation
(1) All walls, ceilings and floors separating heated space from unheated space, the exterior air or the exterior soilshall be provided with thermal insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation in conformance with Section 12.2. to prevent moisture condensation on their room side during the winter and to ensure comfortable conditions for the occupants.
In Plain Language
Thermal insulation is required in the building envelope locations set out in this article, reducing heat loss and improving the building's energy performance.
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.