At NYC Glass Works, we are experts in manufacturing, designing, and installing glass window systems to let the light in while keeping the heat and UV rays out of your interiors. Curtain wall windows have been used in past centuries, and continue to be used now. Like with most of today's construction, windows that make curtain walls, have combined the best from past history, with today's technology, to make a curtain wall window, that is the best of both worlds.