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Technical Booklet G Resistance to the Passage of Sound·Page 36·2.44

Internal masonry walls - mass requirement

Internal masonry walls abutting a type 1 separating wall must have a minimum mass per unit area of 120 kg/m² excluding finish.

non-domesticdwellingsound
Internal masonry walls that abut a type 1 separating wall should have a mass per unit area of at least 120 kg/m² excluding finish.

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