Plywood subflooring is found under the finished flooring. They provide a flat surface for flooring to be placed on. It is a found in every home.
Wall Sheathing
Wall sheathing is a flat cardboard-like layer. It is found in between dry wall and the wall stud. They are imprtant because dry wall can not be put on plain studs.
Building Facade
Building facade is found on the exterior of homes. It helps protect the home from rain and other weather conditions. It is wooden but painted.