Fiberglass is one of the most durable window and door materials used to construct frames today. Fiberglass material tolerates heat and cold while it resists swelling, rotting, and warping, making fiberglass frames durable and low-maintenance with little upkeep required. Fiberglass window & door frames do not have to be thick to provide strength and stability. Fiberglass frames resist weathering effectively, and the framing material provides a service life of over 80 years.
Useful Link: Benefits of FRP, FRP Window & Door Details