The Ontario Building Code | Sealing of Spaces
9.21.5.2. Sealing of Spaces
(1) All spaces between masonry or concrete chimneys and combustible material shall be sealed top or bottom with noncombustible material.
9.21.5.2. Sealing of Spaces
(1) All spaces between masonry or concrete chimneys and combustible material shall be sealed top or bottom with noncombustible material.
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