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Alpine
Insulation fax
800-924-5696
Employees Check Your Mail Here
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Sound Performance
The sound performance of a wall or ceiling is given a number rating called STC, or Sound Transmission Class. The higher the number, the better the sound control. Another rating, the IIC (Impact Insulation Class), is used to describe the sound control performance of floor/ceilings on impact sounds, such as footfalls or moving furniture. As an example, standard wall construction containing 3 1/2" of insulation with a single layer of 1/2"-inch gypsum board on each side produces an STC of 39. |
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