Code Library › Volume 1 › Section 9.20 — Masonry and Insulating Concrete Form
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.20.3.1.Mortar Materials

(1) Cementitious materials and aggregates for mortar and grout shall comply with CAN/CSA-A179, “Mortar and grout for unit masonry.” (2) Water and aggregate shall be clean and free of significant amounts of deleterious materials. (3) Lime used in mortar shall be hydrated. (4) If lime putty is used in mortar, it shall be made by slaking quicklime in water for not less than 24 h or soaking hydrated lime in water for not less than 12 h.
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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.