Fiberglass Windows

Crafted 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 shield your home from winter weather, and are available in a variety of color choices to complement your home.

At Pella of Eau Claire, we have found that Pella Impervia windows are a great choice for homeowners who want the warm look of a painted wood window with the top-of-the-line dependability and excellent energy efficiency that are inherent to a fiberglass window. Covered by our industry-leading warranty, Pella Impervia replacement windows need very little maintenance, ensuring striking beauty and performance year after year.

Pella® Impervia® Series

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

Discover fiberglass windows at your local Pella showroom or click below to schedule a free, in-home consultation and uncover the windows that best fit your budget.