— Extremely strong—can hold large expanses of glass
— Weather-Resistant Material
— Low maintenance
— Rigid yet lightweight
Fiberglass frames are essentially composed of glass fibers and resin, materials that expand and contract very little with temperature changes in the weather. Until recently, the complex profiles required for window designs have been impossible to attain with fiberglass. Innovation has made it possible to design a fiberglass frame and fiberglass windows and patio doors are becoming more popular among homeowners for its beauty and long-lasting durability.
Milgard Ultra (fiberglass/woodclad interior and fiberglass exterior)
Lifetime Warranty - Click here to see warranty.
Marvin Integrity (fiberglass(Ultrex) /woodclad interior and fiberglass exterior)
Marvin Integrity offers a full 20 years on glass seals and 10 years on manufacturing defects. Click here to see warranty.
Andersen 100 Series Composite Fibrex® material
Andersen offers a 20 year parts and 10 year glass warranty. Click here for more details.
Andersen Windows offers a product called Fibrex®. It's made up of reclaimed wood fiber and PVC polymer that is fused together and is unique to Andersen.