Integrity Marvin windows are made with Ultrex pultruded fiberglass, a material patented nearly 20 years ago when Integrity pioneered the fiberglass windows category. Integrity windows and doors outperform roll-form aluminum, vinyl and vinyl/wood composites in virtually every measurable category.
Don’t Settle For Vinyl Windows!
These are the facts: Ultrex is eight times stronger than vinyl and three times stronger than wood/vinyl composites. That’s as tough as steel. While other windows might bend, break or crack over time, Integrity windows hold strong and perform under great stress without showing age or wear. So when a house settles and time marches on, Integrity windows stay true and resist sagging—proving that they’re truly built to last. Want more proof? Watch these fun short videos…
