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Sound Insulation

Building Regulations Approved Document E

What is the difference between Rw, DnTw and Dw for sound insulation?

July 1, 2022

Rw, DnTw, and Dw are all different indices which describe sound insulation performance – or how much noise will transmit through a wall or floor.  Having different indices can be confusing and misunderstanding these terms could mean your building fails the final sound tests.  This guide gives an explanation of the terms and what you […]

Posted By: Rob Cant


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