Code Library › Volume 1 › Section 9.11 — Sound Transmission (See Note A-9.11.)
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.11.1.1.Required Protection

(1) Except as provided in Sentence (3), a dwelling unit and a suite in hotels shall be separated from every other space in a building in which noise may be generated by (a) a separating assembly and adjoining constructions, which, together, provide an apparent sound transmission class (ASTC) rating of not less than 47, or (b) a separating assembly that provides a sound transmission class (STC) rating of at least 50 and adjoining constructions that conforms to Article 9.11.1.4. (See Note A-9.11.1.4.) (2) Reserved. (3) Construction separating a dwelling unit or suite in a hotel from an elevator shaft or refuse chute shall have an STC rating of not less than 55.
Next →9.11.1.2. Determination of Sound Transmission Ratings

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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.