<p>Independently lab tested and time-proven in millions of square feet of  residential and commercial structures, 440 SoundBarrier&reg; is a special-density, structural board made from 100 percent environmental Homasote<sup>&reg;</sup> 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.</p>
<p>Carpenters and do-it-yourselfers can easily install 440  SoundBarrier<sup>&reg;</sup> in room partitions and peripheral walls. Ideal for sound control, flooring applications, shock absorption, thermal insulation, and more.</p>
<p>Made with 98% post consumer waste and Homasote is FSC Certified.</p>