In Plain Language

Unlike many code provisions with a fixed number, frost depth isn't set to one value province-wide. This clause says frost penetration depth (how deep footings typically need to go to stay below the frost line) is determined by local experience, meaning municipal or regional data, rather than a single number in the Code itself.

Common Questions

Q: How deep do my footings need to be to avoid frost heave?
This clause doesn't give a number. It directs you to local experience, in practice usually your municipality's building department, which sets a standard frost depth for that area based on historical conditions.

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.