Fiberglass Windows

Created from patented Duracast® fiberglass composite, Pella® Impervia® fiberglass windows are a cost-effective, low-maintenance alternative to wood replacement windows. They resist warping in the hotter days and defend against winter weather, and are offered in an array of color choices to match your home’s design.

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

Pella® Impervia® Series

  • Made from Duracast®—the strongest, most durable material available in windows
  • Exceptional performance
  • The stunning 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 plan a no-cost, in-home consultation and discover the windows that are right for your home.