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Pella® Impervia® Fiberglass Sliding Window


Pella Impervia sliding windows glide open and closed horizontally for easy operation. They are finished with a beautiful, low-maintenance powder-coat finish that is strong and durable. Sliding windows are a popular choice for modern-styled homes.

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Impervia Sliding 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

  • Cam-action lock hardware for tighter seal
  • Energy saving glass options
  • Smooth sash rollers for easy operation
  • Outstanding resistance to air and water infiltration, wind and noise

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

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Inside Pella Impervia

Our patented fiberglass material was designed to withstand extreme heat, subzero cold and the rigorous performance requirements of a commercial building.43 It resists warping in the summer and becoming brittle in the winter.

Learn About Performance
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For the Pros

Pella Impervia Sliding Window Specs & Install Details

  • Made from the strongest material for windows, our proprietary five-layer fiberglass material61
  • Tested from -40ºF to 180ºF
  • Two- and three-panel options with equal vent, 1/3 and 1/4 vent
  • Two-panel sliding windows available in sizes up to 71-1/2” x 71-1/2”
  • Three-panel sliding windows available in sizes up to 107-1/2” x 71-1/2”
  • Performance class and grade LC30-LC50
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Options for Pella Impervia Sliding Windows

Choosing Your Window


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

Frame 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 finishes.


For Pros

  • 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


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


For Pros


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

  • Surface-mounted sash locks.
  • Color-matched or optional finishes.
  • Nylon roller housings and metal rollers.

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


  • 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

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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.

Learn more about Pella warranties

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