• Incredibly strong, stable fiberglass windows and patio doors.

  • Superior durability in extreme weather conditions.1

  • The quality look of a painted window.

  • Exceptional energy efficiency.

Be Window Smart

Fiberglass Windows and Patio Doors

Design your own Pella Impervia Window or Patio Door

Choose one of the available styles to begin

Awning Window

Casement Window

Double-Hung Window

Single-Hung Window

Sliding Window

Pella Impervia Sliding Patio Door

Sliding Patio Door

Why Choose Pella Impervia?

The Beauty and Style of Fiberglass

  • Beautifully compliments your home with the quality look of a painted window.
  • Arrives prefinished with a durable, low-maintenance powder-coat paint finish in White, Tan, Morning Sky Gray, Brown or Black.
  • Optional dual-color frame available with a White interior and a Tan, Morning Sky Gray, Brown or Black exterior.
  • Optional InViewTM high-transparency screens2 let in 14% more light and are 8% more open to increase airflow than conventional fiberglass screens.3

Unsurpassed Strength and Durability

  • Pella's five-layer Duracast® fiberglass composite is highly stable and suitable for all climates.
  • Durable, patented fiberglass composite can withstand extreme heat to subzero cold.
  • They won't warp in the heat or become brittle in the cold.

Exceptional Energy Efficiency

  • Pella Impervia products offer the energy–efficient options that will meet or exceed ENERGY STAR® certification in all 50 states.
  • Optional foam–insulated frames further improve energy efficiency.
  • Enjoy a more comfortable home year round.

Sizing Information

Looking for installation guides? Get answers to your installation questions in our comprehensive Pella window and door installation guides.

Visit installpella.com.

Prefer Professional Installation?


Rather not tackle window installation?

Let a Lowe's Project Specialist help with an expert installation and professional service you can count on.

  • Shop at home with a Lowe's project specialist.
  • We measure to ensure a precise fit.
  • You get a complete project quote including installation.

  • Enjoy satisfaction for years to come.

    Pella® fiberglass windows and patio doors are backed by the Pella Limited Lifetime Warranty one of the best warranties in the business. See written warranty for complete details.


    1 In testing performed in accordance with ASTM testing standards, Pella's Duracast fiberglass composite material has displayed superior performance in strength, ability to withstand extreme heat and cold, and resistance to dents and scratches.

    2 WARNING: Screen will not stop child or pet from falling out of window. Keep child or pet away from open window.

    3 Screen cloth airflow is based on calculated screen cloth openness. Screen cloth transmittance was measured using an integrated sphere spectrophotometer.