Envirocoustic™ Wood Wool – Backfill Ceiling and Wall:Cementitious Wood-Fiber Backfill Acoustic Ceiling and Wall PanelsWith a built-in Cellulose Fiber Acoustical Backer, Envirocoustic™ Wood Wool Composite panels provide higher Noise Reduction Coefficient (NRC) ratings by absorbing and deadening sound. The panels tame echo and reverberation are Class A fire-rated and pass the NFPA 286 fire test. With eco-friendliness, high-performance, and cost-effectiveness, Wood Wool Composite panels meet the needs of schools and civic centers, restaurants, and many other venues where sound management and safety are vital. Simple to produce by combining water, Portland Cement and wood fibers, Envirocoustic™ Wood Wool Backfill panels are available in many size, shape and color variations that can be customized to fit nearly any décor.Installation is easy: Furring strips are not required and panels can be attached directly to the substrate material.