How Strong is Ultrex?
How Strong Is Ultrex Fiberglass?
Our Windows Are 8X Stronger Than Vinyl
Infinity from Marvin fiberglass windows are 800% stronger than vinyl and 300% stronger than composite windows. Don’t make the blunder of selecting vinyl windows that will eventually have to be replaced. Experience the beauty, coziness, and security of Infinity Windows for as long as you own your home. Do it right the first time and choose Infinity from Marvin – Built for Life!