Window Nation Virginia provides homeowners in the Northern Virginia area with replacement windows, siding, and doors for their home improvement needs. We know homes in Fairfax County are different than homes in Stafford County, which is why we're proud to offer home window replacement to meet the needs of any home. Each of our home windows is available in over 1,500 style and color combinations, including bay windows, casement windows, and double hung windows. All our vinyl windows are custom-made for your home, guaranteeing a perfect fit. Our energy efficient windows are available in double pane and triple pane options to help you save money on your energy bills.