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Pella® Impervia® Fiberglass Single-Hung Window

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Pella Impervia single-hung windows, made from our proprietary fiberglass material, are designed and tested for a lifetime of everyday use. Featuring a stationary top sash and a bottom sash that opens and closes for ventilation, they are a great option for rooms that require access to fresh air. Versatile design features and options help deliver a timeless style to any home. Equal sightlines provide a clean, consistent aesthetic.

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Impervia Single-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

  • Provides outstanding resistance to water, wind and outside noises while delivering energy efficiency, security and ease of operation
  • Interlocking check rail creates a barrier for air and water infiltration
  • Improved security and performance with an exclusive cam-action lock design that pulls one sash into the other
  • Exceptional mulling capabilities for larger, unique window combinations

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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 Single-Hung Window Specs & Install Details

  • Made from our proprietary fiberglass material, the strongest material for windows, engineered for lasting durability61
  • Can handle the most extreme heat and cold16
  • Strong, zinc die-cast locking mechanism for enhanced durability and water resistance
  • Single-hung windows available in sizes up to 47-1/2” x 79-1/2”
  • Performance class and grade LC40-LC50

 

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Options for Pella Impervia Single-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
  • The superior strength of Pella’s fiberglass allows you to combine standard and special-sized windows. together to create larger, unique combinations, made just for your remodel or new construction project.
  • Available mulls include integral mullion, tight mullion, 1/2” structural mullion or 1” structural mullion with additional steel reinforcements.
  • Solutions that meet design pressure requirements up to DP50.

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

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

White

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

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