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Home / NCIDQ Glossary / impact insulation class

impact insulation class

Updated: October 7, 2018 by Lisa League

Impact Insulation Class (IIC) rates the ability of a floor or ceiling to block the sound of impacts from the room above, ex. high heels on the floor above being heard in the room below.

The rating is from 25-65 with 25-55 a typical range for most construction.

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