Timber is a common material used for internal lining that can improve acoustic and thermal performance while also enhancing appearance. Various timber products can be used for lining, including solid timber boards, veneered boards, plywood, and fiberboard. These materials can be installed as fixed slats or panels, hung on a frame, or attached to a frame. Properly installed timber lining enhances aesthetics, acoustic performance, and reduces maintenance needs in a variety of commercial and residential interior spaces.