The Ontario Building Code | Minor Openings in Exposing Building Face
9.10.14.6. Minor openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in Exposing building Face
(1) An opening in an exposing building face not more than 130 cm2 shall not be considered an unprotected opening.
9.10.15. Spatial Separation Between Houses
In Plain Language
Minor openings in the exposing building face may be permitted under the specific conditions set out in this article, allowing some small penetrations without triggering full compliance measures.
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.