The Ontario Building Code | Thickness of Flat Insulating Concrete Form Walls
9.20.17.1. Thickness of Flat insulating Concrete Form walls
(1) The thickness of concrete in flat insulating concrete form walls not in contact with the ground shall be,
(a) not less than 140 mm, and
(b) constant for the entire height of the wall.
In Plain Language
Flat insulating concrete form (ICF) walls must meet the thickness requirements set out in this article, appropriate to their combined insulation-and-structure design.
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.