Fiberglass Windows

Created 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 defend against winter weather, and are carried in a selection of color options to match your taste.

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

Pella® Impervia® Series

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

Take a closer look at fiberglass windows at your local Pella showroom or click below to plan a complimentary, in-home consultation and uncover the windows that are right for your style.

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