TW Perry is a leading building materials dealer serving the area of Maryland, Virginia and the District of Columbia. TW Perry offers a wide range of building materials and products including treated lumber, doors and windows, decking products, paint, hardware and even power tools. We also specialize in supplying finely crafted doors and millwork products, which are used in some of the most exclusive residential projects in the region. We try to make sure that we offer products that our customer needs.