Fiberglass Window Basics
Most conusmers will have a difficult time distinguishing fiberglass from vinyl windows. Both are of course inorganic materials and have a similar texture and look to them. Fiberglass is a great material for window frames, arguably the best in terms of energy efficiency. They are strong and durable, although they will typically run 20% to 30% more than a comparable vinyl window. Fiberglass is also sometimes used as an exterior cladding on wood windows.