Homasote 440 SoundBarrier 1/2" x 4' x 8' Panel

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. 440 SoundBarrier® is made with FSC® certified material.