Why Are Integrity Fiberglass Windows Better Than Vinyl?

When it comes to windows and Doors, Marvin has invented a game changer–Ultrex fiberglass. 8x stronger than vinyl and with far greater design flexibility, Integrity Ultrex is a virtually perfect window making material.
As we wait for the other manufacturers to catch up, we’ll continue installing the window with the greatest combination of durability, versatility, and style.