Fiberglass Windows

Created from patented Duracast® fiberglass composite, Pella® Impervia® fiberglass windows are a cost-friendly, low-maintenance alternative to wood replacement windows. They resist warping in the hotter days and defend against winter weather, and are offered in a selection of color types to complement your home.

At Pella of Mankato, we have discovered that Pella Impervia windows are the right choice for homeowners who want the stunning look of a painted wood window with the superior durability and notable energy efficiency that are a part of a fiberglass window. Supported by our industry-leading warranty, Pella Impervia replacement windows require very little maintenance, resulting in striking beauty and performance for years to come.

Pella® Impervia® Series

  • Created from Duracast®—the strongest, most durable material you can get in windows
  • Excellent performance
  • The stunning look of a painted wood window
  • ENERGY STAR®-rated options conserve energy
Available Styles
  • Awning
  • Casement
  • Double-Hung
  • Single-Hung
  • Sliding
  • Basement
  • Bay and Bow

Take a closer look at fiberglass windows at your nearby Pella showroom or click below to plan a free, in-home consultation and find the windows that best fit your home.