<iframe title="Google Tag Manager" src="https://www.googletagmanager.com/ns.html?id=GTM-8CXX" height="0" width="0" style="display:none;visibility:hidden"></iframe>
Skip to Content

Pella® Impervia® Fiberglass Casement Window

Pella Impervia fiberglass casement windows are hinged on the side and are made from our proprietary fiberglass, the strongest material for windows.32 Sleek profiles and clean lines deliver a timeless style. The revolutionary Easy-Slide Operator hardware solution allows you to simply slide to open your window without the effort of cranking.

  • A variety of color options, including Black.
  • Patented lock system engages multiple locks, with one easy-to-use lock-lever for lasting security.
  • Low-maintenance and will never need to be repainted or refinished.
  • Product #400003

Configuration: 1-wide

Online Only Price
From $961.75

Pella Impervia Casement Window Features

Design Options

Pella Impervia fiberglass products have a long-lasting factory powder-coat finish in your choice of three colors. Solid-color frames feature White, Black or Brown color on both the interior and exterior. Dual-color frames have White on the interior with Brown or Black on the exterior.

Solid-Color Frames

  • black fiberglass frame

    Black

  • brown fiberglass frame

    Brown

  • white fiberglass frame

    White

  • morning sky gray fiberglass frame

    Morning Sky Gray

  • tan fiberglass frame

    Tan

Dual-Color Frames

  • color swatch of white and brown

    White Interior with Brown Exterior

  • color swatch of white and black

    White Interior with Black Exterior

Material

  • 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.
  • Secondary Secure Vent Lock for extra protection.

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.

Easy-Slide Operator

  • black easy slide operator

    Black

  • white easy slide operator

    White

  • brown easy slide operator

    Brown

  • tan easy slide operator

    Tan

  • morning sky gray easy slide operator

    Morning Sky Gray

Fold-Away Crank

  • white fold away crank for impervia windows

    White

  • matte black fold away crank for impervia windows

    Matte Black

  • brown fold away crank for impervia windows

    Brown

  • satin nickel fold away crank for impervia windows

    Satin Nickel (Upgraded finish)

  • tan fold away crank for impervia windows

    Tan

  • morning sky gray fold away crank for impervia windows

    Morning Sky Gray

Combinations

Join a window together with other windows to expand the opening, adding design interest to your home. Mulled windows are joined together in the factory by their frames. Select combinations are available for online purchase. Talk to a Pella sales representative for the complete offering.

Not Available for Online Purchase

combination for casement window 2 casements over 2 transoms

2 wide over transom

combination for casement window 3 transom over 3 casements

Clad frame over 3-wide uneven

a variety of special casement window shapes and combinations

Unique Shapes

Request a Quote

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.

Low-E Insulating Glass

Low-E glass has a coating that is applied to reflect heat and keep your home comfortable. It helps prevent your carpet, furniture and window treatments from fading by blocking most of the sun’s harmful UV rays.

  • sample Advanced Low-E Insulating Glass

    Advanced Low-E Insulating Glass

  • sample AdvancedComfort Low-E Insulating Glass

    AdvancedComfort Low-E Insulating Glass

  • natural sun low-e glass icon

    NaturalSun Low-E with Argon

  • NaturalSun+ Low-E Insulating Glass

    NaturalSun+ Low-E Insulating

  • sun defense low-e glass icon

    SunDefense™ Low-E with Argon

  • Sun Defense+ Low-E Insulating Glass

    SunDefense+ Low-E Insulating

Additional Glass Offerings

Pella Impervia windows are available with a variety of additional glass options. From insulating and tempered glass to sound control glass, we offer several options to meet your needs.

  • tempered glass icon

    Tempered Glass

  • Sample Laminated, Non-Impact Resistant Glass

    Laminated, Non-Impact Resistant Glass

  • Impact-Resistant Glass for Impervia Products

    Impact-Resistant Glass

  • sample Tinted Glass

    Tinted Glass

  • obscure glass icon

    Obscure Glass

  • Sample STC (Sound Transmission Class)-Improved Sound Control glass

    STC (Sound Transmission Class)-Improved Sound Control Glass

  • Sample Triple-Pane Glass

    Triple-Pane Glass

Flat Screens

380x380 sample image

InView

With high-transparency screens from Pella, you can increase the amount of natural light and airflow in your home. InView screens are a great choice for your home — they allow in 14% more light and are 8% more open than standard fiberglass screens.4

Grille Patterns

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

  • impervia-casement-prairie-grilles

    Prairie

  • impervia-casement-traditional-grilles

    Traditional

  • impervia-casement-custom-grilles

    Custom

  • impervia-casement-no-grilles

    No Grilles

Grille Profiles

Grilles-between-the-glass create the classic look of individual windowpanes.

  • 3/4" grilles between-the-glass

    3/4" Grilles-Between-the-Glass

Downloads & Specifications

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
Frame
  • Overall frame depth is 3-1/4".
  • Nominal wall thickness of Duracast® fiberglass composite members is .050" to .090" thick.
  • Jambs contain factory-drilled installation screw holes on block frame.
Sash

Sash is Duracast fiberglass composite — five-layer pultruded fiberglass material, reinforced with a Pella patented interlocking mat.

Glazing System
  • Quality float glass complying with ASTM C 1036.
  • 11/16" dual-pane insulating glass sealed and bonded to sash.
  • 1" Triple-pane insulating glass sealed and bonded to sash.
  • High altitude glazing available.
Dual Weatherstripping
  • Continuous, flexible ThermoPlastic Vulcanizate material in dual durometer design, compressed between frame and sash for positive seal on all four sides.
  • Secondary ThermoPlastic Vulcanizate leaf-type weatherstrip between edge of sash and frame.
Easy Slide Operator
  • Hardened, nickel-coated Steel worm and wheel gears.
  • Harsh environment approved – ASTM B 117 salt chamber and debris cycling, 20,000 life cycle test approved.
  • 5lb operational forces available on sizes when FW is ≤ 35" and FH is ≤ 72.5" or FW > 35" but ≤ 36" and FH ≤ 60".
Roto Operator Assembly
  • Operator linkage, hinge slide, and hinge arms are 300 series stainless steel.
  • Exposed fasteners are stainless steel.
  • Hardware shall exceed 1,000 hours salt spray exposure per ASTM B 117.
  • Unison Locking System—A single handle locking system operates positive-acting arms that reach out and pull the sash into a locked position

Frequently Asked Questions

FAQs about My Product

FAQs about Purchasing Online

Awards and Certifications

contemporary dining room with black impervia windows

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.9

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.

Fiberglass Window Tips & Advice

Compare Casement Windows