• Superior durability in extreme weather conditions.1

  • The quality look of a painted window.

  • More peace of mind and beauty that endures.

  • 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

Double-Hung Window

Single-Hung Window

Casement Window

Awning Window

Sliding Window

Sliding Patio Door

Why Choose Pella Impervia?

The Beauty of Durable Fiberglass

Stay comfortable inside — no matter the weather outside — with Pella's fiberglass windows. Our durable, patented fiberglass composite can withstand extreme heat to subzero cold for maximum performance with:

Pella's five-layer Duracast® composite, which is highly stable and suitable for all climates. As the most durable material available in windows and doors, it prevents warping, shrinking and brittleness.


A more stylish look.

Beautifully complements your home.

  • Durable, low-maintenance powder–coat finish has the quality look of a painted window.
  • Prefinished in White, Tan, Morning Sky Gray, Brown or Black.
  • Optional dual–color frame — White interior with a Tan, Morning Sky Gray, Brown or Black exterior — to complement your home's interior and exterior color palette.

  • Brings more of the outdoors in.

    Optional InView™ high-transparency screens2 let in more light than conventional fiberglass screens and are 8% more open to increase airflow.3


    Lower heating and cooling costs.

    ENERGY STAR® certified.

    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 improves energy efficiency in extreme climates.


    Built to last.

    Pella craftsmanship.

  • Frame corners are reinforced three ways for increased strength and stability.
  • Extremely durable factory powder-coat finish.
  • Backed by a Limited Lifetime Warranty.

  • Stays looking great for years.

    Long–lasting factory powder–coat finish looks great — inside and out — with little care.

    Pella's environmentally friendly paint process

    Virtually eliminates VOCs to help keep the air inside your home healthier.


    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.