Fiberglass replacement windows are durable and need no maintenance. They’re resistant to temperature extremes and moisture. In other words they are the perfect window.

Source: www.windowsforyourhome.com

These are the facts: Ultrex Fiberglass is eight times stronger than vinyl and three times stronger than composites. That’s as tough as steel. So when a house settles and time marches on, Infinity replacement windows stay true and resist sagging—proving that they’re truly built to last.