Integrity from Marvin Windows and Doors are made with Ultrex, a pultruded fiberglass that outperforms and outlasts vinyl, roll-form aluminum and other fiberglass composites.
What’s the difference?
Windows made of Ultrex Fiberglass have 8x the strength of vinyl, are 3x stronger than Fibrex and equal the strength of steel. Not only is Ultrex a more durable material, but it is superior in its resistance to fading, chalking, peeling and cracking.
Strength | Performance | Appearance