Designed to withstand extreme weather conditions, a uPVC bay windows is incapable of warping, corrosion, or peeling as time goes by. While wooden frames of the conventional variety will have to be attended to quite regularly, uPVC offers a strong, low-maintenance frame alternative whose finish will stay intact for decades. With UV resistance, the windows maintain their color over time without fading, thus serving as a worthy investment to any home at a lower cost to maintain.