Pella® Impervia® Casement Window

When it comes to performance, Pella Impervia fiberglass casement windows are an overachiever. Made from our incredibly strong, proprietary fiberglass material, casement windows are hinged on one side and vent open on the other. A revolutionary Easy-Slide Operator hardware allows you to open and close the windows with one simple motion. And with a durable powder-coat finish, Pella Impervia casement windows deliver a timeless, long-lasting look.

  • Unmatched strength and lasting durability for proven performance and sleek style.
  • Tested and designed for the extremes.
  • Operable casement windows available in sizes up to 37-1/2” x 79-1/2”.
  • Fixed casement windows available in sizes up to 71-1/2” x 79-1/2”.
  • Performance class and grade LC40-LC50.
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