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Pella® Impervia® Fiberglass Double-Hung Window

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Get windows and doors ready to handle virtually anything life throws at them. Pella Impervia double-hung windows are made from our proprietary fiberglass, the strongest material available for windows and patio doors, engineered for lasting durability.61 Equal sightlines provide a clean, consistent aesthetic and a sloped sill design gives the look of a more-traditional double-hung. With our durable powder-coat finish, your double-hung windows will look great for years — inside and out.

Impervia Double-Hung 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

  • Outstanding resistance to water, wind and outside noise, meeting the rigorous performance requirements of a commercial building43
  • 100x more impact resistant than a leading wood/plastic composite16
  • Tilt-latch to make cleaning easier from the interior
  • Sleek profiles and more glass allow for bold, modern designs in an up-to-date color palette, including Black

Pella Impervia

Get windows ready to handle virtually anything life throws at them. Pella Impervia products are made from our proprietary fiberglass, the strongest material for windows.61

Pella’s exclusive fiberglass will never rot or corrode and resists dents, bends and breaks — and the list goes on. With a tough-as-nails powder-coat finish, your windows will never need to be painted or refinished.

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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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cutaway of impervia products

The Pella Difference

We do more than just create windows and doors. We test beyond industry requirements and innovate continuously to make beautifully designed products that you can be proud to own.

For the Pros

Pella Impervia Double-Hung Window Specs & Install Details

  • Timeless style and proven performance with unmatched strength and lasting durability
  • Handles the most extreme heat and cold16
  • Interlocking checkrail creates a barrier for air and water infiltration
  • Double-hung windows available in sizes up to 47-1/2” x 79-1/2”
  • Performance class and grade LC30-LC50
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Product Downloads

Options for Pella Impervia Double-Hung 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
  • Create larger, unique combinations, with factory-mulled combinations that help save you time on the jobsite.
  • Integral mullion, tight mullion, 1/2” structural mullion or 1” structural mullion with additional steel reinforcements available.
  • Residential and light commercial solutions designed and tested to ASTM E330 for structural test pressures up to 75PSF (DP50).

Interior Finishes

Pella Impervia fiberglass products have a long-lasting factory powder-coat finish in your choice of three colors. Learn more about interior finishes.

Black

For Pros

Materials
  • Pella Impervia products are made from our proprietary fiberglass material, the strongest material for windows, engineered for lasting durability.61
  • Our long-lasting powder-coat finish meets AAMA 624, which is a highly-rated fiberglass coating.
  • 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

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

White

For Pros

Hardware

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

  • Block-and-tackle balances.
  • Surface-mounted sash locks.
  • 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

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.

Learn more about Pella warranties