During the past 13 years of installing windows, we’ve noticed at Diamond Builders a huge increase in the number of commercial and residential clients we’ve assisted who’ve ordered fiberglass windows for their homes or businesses due to the material’s many benefits. Fiberglass is trusted enough to be used for boat hulls and chemical storage tanks because it holds up so well when exposed to certain environmental factors, including salt water and excessive heat. As a highly energy efficient material, fiberglass also delivers many other positives when used in window frames, such as: