Pella (ProLine) Casement Windows

Pella® 450 Series Casement Windows

  • Operable sizes up to 2' 11" x 6' 1"
  • Patented Sure-lock system, one lever operates all locks on the sash
  • Performance Grade up to PG50

A local Pella team member is ready to help you with your project.

Installation Guides Warranty Info

Features & Options

Sizes and Shapes Pella ProLine Casement Window



Design Data

  • Design data available for egress, vent opening, clear opening visible glass and frame area
  • View design data


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Performance Values Pella ProLine Casement Window

These windows provide outstanding resistance to air and water infiltration, wind and outside noise while increasing energy efficiency, security and ease of operation.

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View thermal performance

View sound transmission performance

Wood Types Pella ProLine 450 Series Casement Window

Available with Pine interiors and low-maintenance aluminum-clad exteriors. All wood types are treated with Pella's EnduraGuard® wood protection for beauty and performance...year after year.

  • casement

Pella's EnduraGuard® wood protection formula has three active ingredients. This powerful combination, together with our immersion-treatment method, helps ensure strong protection on every exterior wood surface of our products. The result is advanced protection against the effects of moisture, decay and stains from mold and mildew.

Learn more about all Pella Wood Types

Interior Finishes Pella ProLine Casement Window

Interior finish options include unfinished (ready for site finishing), primed, prefinished paint* and prefinished stain*.

Unfinished Interiors

Wood products are available with unfinished interiors so they can be painted or stained to complement other interior finishes.

Primed Interiors

Primed Pine interiors are ready to paint so the windows can perfectly match other painted interior finishes.

Prefinished Painted Interiors*

Wood window can arrive at the job site with a durable prefinished factory-paint finish.

Prefinished Stained Interiors*

The interiors of Pella ProLine windows are available factory-stained in your choice of eight colors.

  • Natural

  • Golden Oak

  • Early American

  • Provincial

  • Special Walnut

  • Red Mahogany

  • Dark Mahogany

  • Cherry

*Available on Pine products.

NOTE: Wood is a product of nature; grain pattern will be unique and may vary on each window or door. Actual finish colors may vary from those shown because of the unique nature of wood.

Learn more about all Pella's Interior Finishes

Exterior Finishes Pella 450 Casement Window

Low-maintenance aluminum-clad wood exteriors are durable and weather-resistant.

Exterior Colors

  • White

  • Poplar White

  • Tan

  • Putty

  • Portobello

  • Morning Sky Gray

  • Brown

  • Hartford Green

  • Black

  • Brick Red

Aluminum-Clad Wood Exteriors

  • Pella's most popular exterior colors are available
  • Standard and Feature* colors
  • No setup charges or minimum quantities for any Pella® color option

Durable, low-maintenance EnduraClad aluminum cladding with EnduraClad protective finish for most projects where resistance to fading, chalking, chemicals and abrasion is needed. Meets the performance requirements of AAMA 2603.

Seacoast EnduraClad protective finish for coastal projects with high salt exposure.

*Available in Poplar White, Putty, Hartford Green, Black and Brick Red only.

Learn more about all Pella Exterior Finishes

Glazing Pella ProLine Casement Window

Pella's most popular glass options provide design, performance and budget flexibility.

Insulating glass options include:

  • Advanced Low-E with argon*
  • SunDefense Low-E with argon*
  • NaturalSun Low-E with argon*
  • Advanced Comfort
  • Clear
  • Obscure
  • Tempered

Pella's Low-E glass options reduce the transmission of solar heat gain and ultraviolet light while allowing the transmission of visible light.

*Optional high-altitude Low-E insulating glass may not contain argon in most products.

View thermal performance

Learn more about all Pella Glass Options

Grilles Pella ProLine Casement Window

  • Three grille types are available on Pella ProLine casement windows.
  • Simulated-Divided-Light grilles adhere to the exterior face, and wood grilles are adhered to the interior face
  • Grilles-between-the-glass are permanent aluminum grilles that are factory installed between the panes of glass to provide easy cleaning
  • Removable Interior grilles can be removed for glass cleaning
  • Simulated-Divided-Light grilles with Spacer
  • Simulated-Divided-Light Grilles

  • Grilles-between-the-glass

  • Removable Interior Grilles

  • Simulated-Divided-Light Grilles with Spacer

Simulated-Divided-Light grilles

Interior grilles are wood and can be prefinished to match frame. Aluminum-clad exterior grilles match frame color.

  • Grilles are 7/8" wide
  • Color matches frame
  • Multiple grille patterns are available

Grille Profiles

  • 7/8" width

Grille Patterns

  • Traditional

  • 9-Lite Prairie

  • Cross

  • Top Row

  • Custom Equally Divided


Permanent aluminum grilles are factory-installed inside the airspace of insulating glass to provide the look of divided lights while making glass cleaning easy.

  • Exterior finish matches aluminum-cladding color
  • Seven interior colors are available
  • Grilles are 3/4" wide

Grille Profiles

Grille Patterns

  • Traditional

  • 9-Lite Prairie

  • 12-Lite Prairie

  • Cross

  • Top Row

Grille Interior Colors

  • White

  • Tan*

  • Putty*

  • Brown*

  • Ivory

  • Harvest

  • Brickstone

  • Cordovan

Removable interior grilles

Roomside wood interior grilles are securely attached to the interior, but can be removed for glass cleaning.

  • Available prefinished to match the interior wood finish and exterior cladding
  • Available in two standard and custom widths

Grille Profiles

Also available in custom widths.

  • 3/4" width

Grille Patterns

  • Traditional

Learn more about all Pella Grille Options

Hardware Pella ProLine Casement Window

  • A broad range of innovative casement window hardware styles and finishes are available to customers
  • Integrated crank with fold-away handle
  • Patented Unison Lock System
  • Stainless-steel operating arm and hinges
  • Optional limited opening and egress hardware

Integrated Crank with Fold-Away Handle

Improves operation and aesthetics and won't interfere with roomside window treatments \u2014 standard feature on all Pella casement windows.

Champagne, White, Brown, Bright Brass, Satin Nickel and Oil-Rubbed Bronze* finishes are available.

SureLock® System

The patented SureLock System reaches out to lift and pull the sash against the weatherstripping to form a tight seal. A concealed linkage secures both upper (A) and lower (B) locks with a single easy-to-reach handle (C).

  • One lock installed on units 29" and smaller frame height
  • Two operating locks installed on units over 29" frame height

Roto-Operator Assembly

Stainless-steel operator linkage, hinge slide and hinge arms resist rust and corrosion and ensure years of dependable performance.

Easy Wash

Sash moves toward the center of the frame, allowing exterior glass to be cleaned from inside, making cleaning easier.

*Oil-Rubbed Bronze is a living finish that will develop its own unique patina with use.

Learn more about all Pella Hardware Options

Screens Pella ProLine Casement Window1

Full screens are optional. Two types of high-transparency screen fabric are available

InView Screen

  • The standard option on all Pella wood windows
  • Allows in 14% more daylight and 8% more airflow than a conventional fiberglass screen2
  • Made from a screen material that's more transparent than conventional fiberglass screens

Vivid View® Screen

  • Available as an upgrade on all Pella wood windows
  • Allows in 29% more light and 21% more airflow than a conventional fiberglass screen2
  • Made from a clearly revolutionary screen material that's practically invisible providing the crispest, sharpest view

1Warning: Use caution when children or pets are around open windows and doors. Screens are not designed to retain children or pets.

2Screen cloth airflow is based on calculated screen cloth openness. Screen cloth transmittance was measured using an integrated sphere spectrophotometer.

Learn more about all Pella Screen Options
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