Founded in Denver, Colorado in 1984, Discount Windows & Siding, INC (DWS) is now the largest stocking window retail location in the Rocky Mountain Region. We have thousands of windows in inventory and over 100,000 satisfied customers. What we do not stock we can custom order for you. In fact, it will be factory direct at discount prices from one of our many quality manufacturers. We are also a full service window replacement company. We always offer expert installation by our professional craftsmen.