A Wooden Door has several layers of wood with polystyrene insulation between the layers. This insulation improves the R-value factor plus helps to deaden noise. The doors are made either from a solid wood slab or, more commonly, a frame-and-panel construction that uses natural wood. The offered Wooden Door is very efficient and made for use in a number of places. The doors are very strong and made for long term use. It is very attractive.