Thermo-Bilt Windows and Doors is a window and door replacement company in Toronto and surrounding GTA area. Our products combine everything you'd want in new windows or doors: beauty, energy efficiency, durability, and value. We install and replace windows with care, quality workmanship, and strive for long lasting customer satisfaction. Through superior glass engineering and rigorous testing, our windows feature a layered glass that lasts longer, stays cleaner, and maximizes thermal performance.