Independently lab tested and time-proven in millions of square feet of residential and commercial structures, 440 SoundBarrier is a special-density, structural board made from 100 percent environmental Homasote cellulose fiber, a homogeneous composition manufactured with uniformly distributed protection against termites, rot and fungi and resistance to moisture. It also insulates, with twice the R-value of wood. Made with FSC certified material.
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov