4.2.3.4.Prevention of Deterioration of Masonry

(1) Where plain or reinforced masonry in foundations or in structures supporting soil or rock may be subject to
  conditions conducive to deterioration, protection shall be provided to prevent such deterioration.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.