12mm x 4 x 8 in. Homasote 440 SoundBarrier Board is an effective and environmentally friendly solution designed for soundproofing and insulating both residential and commercial structures. This special-density, structural board is made from 100 percent Homasote cellulose fiber, ing a homogeneous composition that provides uniform protection against termites, rot, and fungi while also resisting moisture. Independently lab tested and proven in millions of square feet of construction, it insulates with twice the R-value of wood, making it an excellent choice for enhancing energy efficiency. Crafted from FSC material, this board is sustainable and eco-friendly. Easy to install for carpenters and DIY enthusiasts, the 440 SoundBarrier Board is i for use in room partitions, peripheral walls, ceilings, and floors. It is suitable for a wide range of applications, including single or multi-family housing, apartments, condominiums, motels, schools, professional buildings, and assisted living facilities. The Homasote 440 SoundBarrier Board ensures reliable soundproofing and insulation, creating a quieter and more energy-efficient environment. Model Number: HOMASOTE