Who makes the best fiberglass replacement windows?
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.
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.