Code Library › Volume 1 › Section 9.22 — Fireplaces
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.22.9.1.Clearance to the Fireplace Opening

(1) Combustible material shall not be placed on or near the face of a fireplace within 150 mm of the fireplace opening, except that where the combustible material projects more than 38 mm out from the face of the fireplace above the opening, such material shall be not less than 300 mm above the top of the opening.
← Previous9.22.8.1. Conformance to StandardNext →9.22.9.2. Metal Exposed to the Interior

Common questions about this part of the code

How big does a fireplace hearth extension need to be in Ontario?What clearances and damper requirements apply to fireplaces in Ontario?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

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.