PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.28.2.2.Aggregate
(1) Aggregate shall be clean, well-graded natural sand or sand manufactured from crushed stone, gravel or air-cooled
blast furnace slag and shall contain no significant amounts of deleterious material.
(2) Aggregate grading shall conform to Table 9.28.2.2.
Table 9.28.2.2.
Aggregate Grading for Stucco
Forming Part of Sentence 9.28.2.2.(2)
% Aggregate Passing Sieve
Sieve Sizes, mm
Maximum Minimum
4 — 100
2 — 90
1 90 60
0.5 60 45
0.25 30 10
0.125 5 —
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
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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.