Made from patented Duracast® fiberglass composite, Pella® Impervia® fiberglass windows are a cost-effective, low-maintenance alternative to wood replacement windows. They protect from warping in the hotter days and defend against winter weather, and are available in a variety of color options to complement your home.
At Pella of Casper, we have learned that Pella Impervia windows are a fitting choice for homeowners who want the impressive look of a painted wood window with the superior reliability and excellent energy efficiency that come with a fiberglass window. Backed by our industry-leading warranty, Pella Impervia replacement windows require almost no maintenance, offering striking beauty and performance for years to come.