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 | Glass Blocks

9.20.2.3. glass Blocks

(1) glass blocks shall not be used as loadbearing units or in the construction of fireplaces or chimneys.

In Plain Language

Glass blocks used in construction must meet the requirements set out in this article, covering their structural and installation considerations.

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.