Why Fiberglass?
The Ultrex Fiberglass Advantage
More Daylight, Bigger Views
Because of Ultrex's incredible strength, you get narrower frames than other replacement windows — so you get more incredible views for your money.
Ultrex® Fiberglass is specifically designed to resist warping and weathering in any conditions for long-lasting durability. Vinyl can expand and contract under everyday conditions— potentially compromising your home's integrity.
Compare Infinity
Strength
Learn More
Ultrex is 8x stronger than vinyl and 3x stronger than Fibrex.
Stability
Learn More
Ultrex’s low expansion rate means our windows and doors stay tight and true for a weathertight seal.
Durability
Learn More
Infinity's acrylic finish is 3x thicker than the competition and resists scratches, fading and chalking.
Vinyl
Good
Good
Good
Vinyl/Wood Composites (Fibrex®)
Better
Better
Better
Infinity Ultrex® Fiberglass
Best
Best
Best
