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

9.20.4.2.Masonry Units

(1) Hollow masonry units shall be laid with mortar applied to head and bed joints of both inner and outer face shells. (2) Vertically aligned webs of hollow masonry units shall be laid in a full bed of mortar (a) under the starting course, (b) in all courses of columns, and (c) where adjacent to cells or cavities that are to be filled with grout. (3) Except for head joints left open for weep holes and ventilation, solid masonry units shall be laid with full head and bed joints.
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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.