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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

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Pella Impervia Casement Window Features

    • Strongest Material for Windows 9

      • Patented Easy-Slide Operator Hardware

        • Enhanced Energy Efficiency

        Design Options

        Pella Impervia fiberglass products have a long-lasting factory powder-coat finish in your choice of five colors. Dual-color frames have White on the interior with Brown, Tan, Morning Sky Gray 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

                  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.

                  Downloads & Specifications

                  • impervia casement window cob
                  • cross section of an impervia casement with the easy slide operator
                  • fixed sash and frame impervia window cross sections

                  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

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                  Awards and Certifications

                  • Best Window & Door Product: Easy-Slide Operator

                    International Builders' Show, 2021

                    Best in Window & Door category for product innovation, functionality, design and consumer friendliness.

                  • Best in Show: Easy-Slide Operator

                    International Builders' Show, 2021

                    Best product in the show, with over 200 entries in six categories.

                  • People's Choice winner: Easy-Slide Operator

                    Azure Magazine, 2021

                    Selected as a favorite by the public in the Architectural Products category.

                  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.

                  Other Pella Impervia Products

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                    • Exceptionally energy efficient

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