BTL has been installing Replacement Windows in Greensboro for over 30 years! Replacement Windows by BTL features a variety of styles and energy-saving features that will exceed your expectations. Add a timeless design to your home by selecting our Double Hung vinyl windows for replacement. Our quality Double Hung installation windows are durable and last a lifetime. Homeowners can’t go wrong when choosing the classic double hung window. As our most popular replacement window, the Double Hung has a convenient tilt-in mechanism that allows for easy cleaning, while featuring distinct styling and endless decorative options to match your home and your lifestyle.