Ashburn has dealers who sell building materials and supplies. Building a house needs a number of different materials, such as wood, roofing materials, paints and solvents, safety devices and garden equipment. Dealers in Ashburn maintain an inventory of the products they stock, and one can select whatever one needs from them. They also offer very competitive rates, to ensure that building a house isn't more expensive than it needs to be. Some of the materials that may be offered for sale include lumber (in which one can buy beams, decking, engineered wood, fencing, molding, plywood, siding, timbers and veneeers), masonry supplies (such as bagged product, forming tube, expansion joints, pier blocks, scrapers and tile accessories), paints including solvents, adhesives, patching, abrasives, etc. These products come with quality assurance and a warranty to protect against defects. Dealers in Ashburn also provide services such as technical know-how to help customers pick out what they need, delivery services, and options to match color co-ordinated accessories.