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Pella® Impervia® Fiberglass Casement Window

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When it comes to performance, Pella Impervia fiberglass casement windows are an overachiever. Made from our incredibly strong, proprietary fiberglass material, casement windows are hinged on one side and vent open on the other. A revolutionary Easy-Slide Operator hardware allows you to open and close your windows with one simple motion. 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 with our proprietary fiberglass material61
  • Rot- and corrosion-free
  • Tested for the extremes and suitable for all climates
  • Heavy-duty powder-coat finish, including Black

Enhancements

  • Innovative Easy-Slide Operator hardware solution is available
  • Solid- and dual-color frames in an up-to-date color palette
  • Matching fixed and operable styles available for larger window combinations
  • Durable three-way corner joints for added strength, durability and reliable water performance

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Inside Pella Fiberglass

Pella Impervia windows are created from our exclusive fiberglass formula. A structural mat places rovings in a specific, intricate order to meet our high strength standards. Additional layers of strategically placed rovings are added, then the materials are pulled through a machine, injected with polymer resin and heated. It creates an entirely new, thermoset material which won't break down when exposed to the elements or lose its shape in extreme heat — unlike other materials.

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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.

For Pros

Combination Design Considerations
  • Made just for your remodel or new construction project, unique and large factory-mulled assemblies help save time on the jobsite.
  • Integral mullion, tight mullion, 1/2” structural mullion or 1” structural mullion with additional steel reinforcements.
  • Residential and light commercial solutions designed and tested to ASTM E330 for structural test pressures up to 75PSF (DP50).
  • Meet or exceed structural framing requirements of the International Building Code section 2403.3 for more demanding commercial casement and awning window applications.
  • Ability to choose a solution based on project classification, including structural framing requirements for casement or awning specified projects.

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.

Black

For Pros

Materials
  • Pella Impervia windows are made from our proprietary fiberglass material, the strongest material for windows, engineered for lasting durability.61
  • With relentless strength and long-lasting durability, Pella’s proprietary fiberglass helps ensure less maintenance with fewer callbacks.
  • Our long-lasting powder-coat finish meets AAMA 624 which is the highest rated fiberglass coating among leading national competitors.
  • Exclusive thermoset material won't expand, warp or sag in summer heat, or shrink and turn brittle in harsh winter conditions.

Styling Your Window


Hardware

The Easy-Slide Operator is a revolutionary way to operate your casement and awning windows. Simply slide to open and close, without the effort of cranking. Or select the fold-away crank, that folds neatly away, against the window frame. Both solutions allow roomside window treatments to hang neatly in your room.

Black

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

Window Enhancements


Screens

Flat Screens

Conventional fiberglass screens come standard.

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.

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