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Pella® Impervia® Fiberglass Casement Window

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Pella Impervia casement windows open and close with the turn of a crank. Create sleek designs featuring slim profiles and more visible glass with our exceptionally strong fiberglass. And with a durable powder-coat finish, Pella Impervia casement windows deliver a timeless, long-lasting look.

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Impervia Casement 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

  • Optional foam insulation for better energy performance
  • Exceptional energy efficiency
  • Innovative locking system for improved security and a stronger seal
  • Patented unison locking system, with one easy-to-use lock-lever

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

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Inside Pella Impervia

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

Learn About Performance
cutaway of impervia products

For the Pros

Pella Impervia Casement Window Specs & Install Details

  • 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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Options for Pella Impervia Casement Windows


Choosing Your Window


Combinations

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

For Pros

Materials
  • Pella Impervia windows are made from Pella's patented five-layer, engineered Duracast® fiberglass composite.
  • A fiberglass composite sharing the same properties of strength, durability and temperature resistance as materials used in the aerospace industry.
  • Allows Pella Impervia products to withstand extreme conditions better than windows made from other materials.
  • Highly stable material won't expand, warp or sag in summer heat, or shrink and turn brittle in harsh winter conditions.

Styling Your Window


Hardware

Pella's fold-away crank is available in today's most popular finishes.

White

For Pros

These windows are available with a range of hardware options and finishes to meet most design objectives and budgetary requirements.

  • Integrated crank with fold-away handle.
  • Patented Unison Locking System.
  • Stainless-steel operating arms and hinges.
  • Optional limited opening and egress hardware.
  • Color-matched or optional finishes.

Grille Patterns

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

Prairie

Grille Profiles

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

3/4" Grilles-Between-the-Glass

Grilles-between-the-glass

  • Aluminum grilles with 3/4" contour are permanently sealed between the panes of insulating glass.
  • Finish is color-matched to interior and exterior frame color.
cross section of dual-pane grilles between the glass

Dual-Pane 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

insynctive app in hand with status

Screens

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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LIMITED LIFETIME WARRANTY

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

Learn more about Pella warranties

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