Plywood is an extremely versatile product, and it can be used in a wide variety of applications, based on various factors like reinforcing layers and decorative surfacing. Builders love plywood for its water resistance, structural stability and low cost. Because of its strength and affordability, it is often used … Plywood is a building product that is common in the United States. If plywood is destined for indoor use, it is made with urea-formaldehyde glue, which dries quickly and is inexpensive. Both of these refer to a mix of Shorea species, the same used for luan or lauan plywood. They also love oriented strand board, though. In this industry, it commonly goes under the name meranti or Philippine mahogany. Pine, spruce, mahogany, Douglas fir, birch, oak and maple are types of wood used for exterior plywood. The layers are glued together and if water-resistant glue is used, it is exterior plywood. Luan plywood also remains a popular option for exterior projects, including boat building. It's used in everything from furniture to house construction.The big advantages of plywood include: Exterior plywood used … For that intended for use in outdoor applications or wet environments, a more expensive water resistant glue is used to prevent the plies from coming apart, or delaminating, and compromising the strength of the plywood. Type of Plywood Used on Roofing.