The Ontario Building Code | Support of Insulation
9.29.5.4. support of insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation
(1) gypsum board supporting insulation shall be at least 12.7 mm thick.
In Plain Language
Insulation behind this interior finish needs adequate support, as set out in this article, keeping it properly positioned within the wall or ceiling assembly.
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.