Wood based underlayments are panel or sheet materials that are used between a structural subfloor and a finish floor surface. Also known as overlayment, wood panel materials are commonly used under resilient tile or sheet floors. They can also be used under adhered carpet or other nonstructural flooring as well.

Subflooring is the structural component of a building that provides rigidity to the floor structure, supports live loads, and serves as the surface to which floor finishes can be applied. Wood subflooring is installed in all types of structures, including timber, platform, and balloon framed. It can also be used in special applications such as radiant heat, floating, raised, or sprung floors. Common types of wood subfloor include individual wood boards and wood panels.

Commonly wrapped around the outside of a structure, insulating sheathing is popular today because of demanding energy codes. Insulating sheathing is a foam insulated board material that reduces energy consumption. It does not have any structural ability and it requires additional lateral bracing to resist seismic and wind loads. Common types of insulating sheathing include polyisocyanurate, molded expanded polystyrene and extruded expanded polystyrene.

Sheathing is the board or panel material used in floor, wall and roof assemblies of both residential and commercial construction. The most basic function of sheathing, in any application, is to form a surface onto which other materials can be applied. There are several types of sheathing, each having a specific function based on its application.