Fiberglass Windows

Made from patented Duracast® fiberglass composite, Pella® Impervia® fiberglass windows are a budget-friendly, low-maintenance alternative to wood replacement windows. They protect from warping in the heat and stand up to winter weather, and are offered in a selection of color choices to match your home’s design.

At Pella of Calgary, we have learned that Pella Impervia windows are the right choice for homeowners who want the impressive look of a painted wood window with the top-of-the-line reliability and notable energy efficiency that come with a fiberglass window. Supported by our industry-leading warranty, Pella Impervia replacement windows demand almost no maintenance, ensuring exceptional beauty and performance year after year.

Pella® Impervia® Series

  • Constructed from Duracast®—the strongest, most durable material you can have in windows
  • Impressive performance
  • The quality 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 schedule a no-cost, in-home consultation and discover the windows that best fit your home.