Thompson Creek Window Company is the Mid-Atlantic region’s premier home improvement replacement products company. In 2014, we were ranked the #6 on Remodeling Magazine’s annual list of the top 550 replacement contractors in the United States. We have been customizing and manufacturing replacement windows, doors, gutters and siding in the Mid-Atlantic region for more than 30 years. Our products deliver time and again, improving a home’s energy efficiency and increasing home values, curb appeal and sheer comfort. Our windows and gutter systems are custom manufactured, installed and serviced from our family owned and operated factory in Landover, Maryland – eliminating costly and inefficient middle parties. We’re so sure you’ll love our products that we back everything up with a transferable double lifetime guarantee.