Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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The Ontario Building Code | Permanent Form Material

9.15.4.1. Permanent Form Material

(1) insulating concrete form units shall be manufactured of polystyrene conforming to the performance requirements of CAN/ulc-S701, "Thermal insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation, Polystyrene, Boards and pipe Covering", for Type 2, 3 or 4 polystyrene.

In Plain Language

Permanent form material, such as insulated concrete forms left in place, must meet the requirements set out in this article for use in foundation construction.

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.