The Ontario Building Code | Clearance
9.27.9.5. Clearance
(1) Not less than 3 mm clearance shall be provided between hardboard siding and door or window frames.
9.27.10. OSB and waferboard
In Plain Language
A minimum clearance must be maintained between this cladding and the ground or other surfaces, as set out in this article, protecting the material from splash-back moisture and decay.
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.