The Fiberglass Advantage
Fiberglass is valued for its longevity and ability to conserve energy even in extreme climate conditions. It resists the transfer of heat and cold, so heat is kept to the outside in the summertime, inside in the wintertime -- keeping heating and cooling bills low.
The virtually indestructible nature and low maintenance attributes of fiberglass make it a premier material for windows today. Less energy is required to manufacture fiberglass than other window and door material, and little waste is produced during the manufacturing process. In fact, a fiberglass window will last for about 40 years (vinyl's typical life expectancy is about 15 years).