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Pella Impervia double-hung windows have two moveable sashes that provide ventilation throughout your home. Our low-maintenance fiberglass windows provide exceptional durability and can withstand some of the harshest conditions. With our durable powder-coat finish, your double-hung windows will look great for years — inside and out.

  • Made with Pella's patented Duracast® fiberglass composite material.
  • Operable sizes up to 3' 11-1/2" x 6' 5".
  • Performance Grade up to PG50.

If the tinting contributes to a defect in the product, the defect would not be covered under the warranty.

Inside the Pella Impervia Series Window

Made from our patented five-layer fiberglass material, Pella Impervia windows are on average 100x more impact-resistant than a leading wood/plastic composite product.59 Tested from -40ºF to 180ºF, these windows can withstand some of the harshest conditions, making them strong and incredibly energy efficient.16

    cutaway of impervia products


    Pella products are backed by some of the strongest warranties in the business.

    Learn more about Pella warranties

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