Champion is proud of its more than 70 years of quality and experience. Custom-built replacement windows are an easy, cost-efficient way to enhance your home's look and feel, inside and out. Explore Our Custom Window Styles - Our technologically advanced frame is designed and engineered in our own Champion facility to ensure it is created with the highest level of expertise. Each and every Champion window features a superior-quality frame for strength, performance and beauty, and incorporates unique thermal insulation features to make your home climate-controlled and comfortable and your energy bills less expensive.