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Pella® Impervia® Fiberglass Double-Hung Window


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.

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Impervia Double-Hung Window Features

Why Fiberglass?

  • Superior strength and durability with patented fiberglass material16
  • Withstands the most extreme temperatures
  • Long-lasting powder-coat finish, including Black
  • Sleek, slim profiles
  • Meets the rigorous performance requirements of a commercial building43

Performance Enhancements

  • Energy-efficient options
  • Exclusive cam-action lock design for improved security and a stronger seal
  • Insulating foam available for increased energy efficiency

50% off qualifying installations1,3or0% APR for 48 months2,3

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Inside Pella Impervia

Made from our patented fiberglass material, Pella Impervia products are on average 100x more impact-resistant than a leading wood/plastic composite product.59 Our highly stable material won’t expand, warp or sag in the summer heat or shrink and turn brittle in harsh winter conditions.

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For the Pros

Pella Impervia Double-Hung Window Installation and Product Specs

Installing Pella Impervia fiberglass double-hung windows yourself? Browse through installation details and product specs for Pella Impervia windows, curated specifically for you.

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Options for Pella Impervia Double-Hung Windows

Choosing Your Window


Make a design statement with window combinations. Additional combinations are available. See your Pella sales representative for the complete offering.

Interior Finishes

Pella Impervia fiberglass products have a long-lasting factory powder-coat finish in your choice of five colors plus dual-color frame options. Learn more about interior finishes.

white enduraclad paint window corner


Styling Your Window


Pella's cam-action locks are available in today's most popular finishes.

white cam-action lock for impervia windows


Grille Patterns

Grilles give the appearance of individual window panes. Pella offers many grille patterns to help enhance your home's architectural style.



Grille Profiles

Grilles-between-the-glass create the classic look of individual windowpanes. Learn more about grille profiles.

3/4" grilles between-the-glass

3/4" Grilles-Between-the-Glass

Window Enhancements

Integrated Security Sensors

Stay connected to your windows.

Preserve beauty, add comfort and enhance home security with innovative Pella Insynctive® technology.

Protect what matters most. Monitor windows while at home or away with the Pella Insynctive App.40

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Conventional Fiberglass Screens

Pella's high-transparency screens are made of a finer screen fabric than conventional screens for a clear view that allows more air and natural light to flow into your home.

Pella InView™ screens let in 14% more light and are 8% more open for improved airflow compared to conventional fiberglass screens.5

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

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