Wood Installation Systems

Pella® wood products are appropriate for a variety of wall conditions whether for new construction, everyday renovation projects or high-profile historical restorations. And we have a full range of installation accessories to accommodate the installation of Pella windows and doors in virtually any structure.

New Construction Methods of Attachment

There are four primary methods of attaching Pella® aluminum-clad wood windows in new construction: fins, clips, receptors and anchorage through the frame.

For an in-depth review of Pella's full range of installation systems and construction details for new construction, refer to the link below or contact your local Pella representative.


View Complete Installation Details

View Installation Videos

Fin Installation

Fin installation is applicable when construction methods permit window and door units to be installed from the exterior prior to the application of exterior cladding, such as lap siding, brick veneer or stucco.

Installation Fin


  • Fin Installation Clad
  • Factory-Applied Aluminum Trim

    Aluminum brickmould installation is applicable when construction methods permit aluminum-clad wood window and door units to be installed from the exterior.

    Aluminum Brickmould


  • Aluminum Brickmould Installation Clad
      EnduraClad® Factory-Applied Trim in Brick Veneer Applications DWG | DXF
      EnduraClad Factory-Applied Trim in Replacement Applications DWG | DXF
      EnduraClad Factory-Applied Trim in Siding Applications DWG | DXF
      EnduraClad Factory-Applied Trim Profiles DWG | DXF
  • Wood Brickmould

    Wood brickmould installation is applicable when construction methods permit wood window and door units to be installed from the exterior.

    Wood Brickmould


  • Wood Brickmould Installation
  • Clip Installation

    Clip installation is applicable when construction materials or sequence dictates the window units be installed from the interior or after the wall system is completely constructed.

    Clip Installation
  • Clip Installation Clad
      Casement with Concrete Block and Brick Veneer DWG | DXF
      Casement with Precast Concrete DWG | DXF
      Casement with Steel Studs and Brick Veneer DWG | DXF
      Pella® ProLine® Casement with Precast Concrete DWG | DXF
  • Receptor

    Receptors are used for multistory buildings requiring installation from the interior or when a more robust installation method is desired.


    Anchor Through Frame

    Anchors through the frame are used when wall conditions or construction sequence requires installation from inside the building.


    New Construction Punched Openings

    A facade created by the orderly placement of single or multiple windows in punched openings in a wall can be a strong design statement. With Pella's wide range of sizes and product types, your punched-opening design options are virtually unlimited.

    View Complete Installation Details

    View Comprehensive Design Recommendations for Window and Door Combinations

    View Step-by-Step Installation Instructions and Videos


    Design Recommendations


    Depending on the number and configuration of windows and doors per opening, design recommendations for perimeter clearances, weight limitations, wind loads and water management may vary.


    Perimeter Clearances


    • To determine window opening size for typical installations, add 3/4" to frame width and height
    • For large windows, multiple windows, out-of-plumb openings, and/or in masonry construction, the need for additional jamb clearances should be reviewed




    Typical Sealant Recommendations

    Proper sealant placement is critical to window or door performance.


    • When applying siding, brick veneer or other exterior finish material, leave adequate space between the unit frame and the exterior finish material for backer rod and sealant
    • Note: The sealant details shown are standard recommendations from the sealant industry. Contact your sealant supplier for recommendations and instruction for this or any other application

    New Construction Horizontal Ribbons

    Ribbon windows are an important design element for buildings with sweeping horizontal lines. Pella aluminum-clad wood windows offer elegant solutions for virtually any ribbon application. Our technical staff can assist you with expansion/control and reinforced mullion details to reconcile your design objectives with functional requirements.


    View Comprehensive Design Recommendations for Window and Door Combinations




    Design Recommendations


    In addition to the recommendations for punched openings, the greater width of horizontal ribbons often requires special head/jamb details, reinforcing mullions, expansion mullions, and subsills to resist wind loads, allow for construction tolerances, and provide adequate water management.



    Typical Elevation



    Typical Jamb Detail with Frame Expander


    • The frame expander at the jamb is recommended for combinations from 15' to 20' wide to accommodate discrepancies in construction, growth of unit assemblies and expansion movement
    • Frame expanders can be trimmed in the field
    • Receptors can be used to receive and trim the outside edge of the frame expander

    Typical Sill Detail with Subsill

    Subsill systems that weep incidental moisture to the exterior are recommended for water management in openings where the potential for water infiltration is increased and may not be adequately managed by the building weather barrier, flashings and drainage system.

    Sample conditions include, but are not limited to:

    • Increased level of exposure due to multi-story construction
    • High weather exposure
    • Recaulking would be difficult or unlikely
    • Non-standard installation methods
    • When there are multiple units joined within the opening



    Typical Expansion Mullion Details


    • For horizontal ribbons, expansion/control mullions are recommended every 20' maximum
    • Minimum 1/2" clearance is recommended at each jamb for openings greater than 10' in masonry openings
    • A variety of expansion mullion details are available



    New Construction Vertical Stacks

    When you want the visual impact of vertically stacked windows, the Pella Commercial technical staff can work with you to provide mullion reinforcement or intermediate dead-load support detailed to ensure compatibility with your aesthetic vision.

    View Comprehensive Design Recommendations for Window and Door Combinations



    Design Recommendations


    In addition to the recommendations for punched openings, the greater height of vertical stacks often requires special detailing, reinforcing mullions, intermediate dead load support, and subsills to resist structural loads, allow for construction tolerances, and provide adequate water management.

    Typical Elevation/Section

    Operable or fixed windows of the same width (4"-11" max) can be stacked vertically to a maximum height of 20' without intermediate support.






    Typical Head Detail with Frame Expander


    • When window opening height is 12' to 20', see typical head detail to accommodate discrepancies in construction, floor and ceiling deflection, growth of unit assemblies and expansion movement
    • Frame expanders can be trimmed in the field
    • Receptors can be used to receive and trim the outside edge of the frame expander



    Typical Intermediate Support Details



    • Intermediate dead load support is required for vertical stacks more than 20' in height
    • Many solutions are possible, including those shown
    • Recommendations on the Weight Limitations of Transoms over Doors Combinations Recommendations can be used as a guide for sizing dead load support
    • Check local code requirements when stacking windows past floor lines


    Typical Sill Detail with Subsill

    Subsill systems that weep incidental moisture to the exterior are recommended for water management in openings where the potential for water infiltration is increased and may not be adequately managed by the building weather barrier, flashings and drainage system.

    Sample conditions include, but are not limited to:

    • Increased level of exposure due to multi-story construction
    • High weather exposure
    • Recaulking would be difficult or unlikely
    • Non-standard installation methods
    • When there are multiple units joined within the opening



    New Construction Entrances and Storefronts


    Configurations that combine aluminum-clad wood entrance doors with fixed windows at street level provide virtually infinite design possibilities for creating welcoming building entries. Pella® aluminum-clad wood fixed frames offer the warmth of wood interiors in traditional streetscapes, enabling exterior light to travel inside and providing a hospitable transparency between interior spaces and the exterior environment.

    View Comprehensive Design Recommendations for Window and Door Combinations


    Design Recommendations

    Storefronts and entrances include a combination of windows and doors that often require reinforcing mullions, expansion mullions, and subsills to resist wind loads while providing adequate water management.

    New Construction Window Walls

    When your project requires the visual impact and energy efficiency of aluminum-clad wood window walls, the Pella Commercial design team can partner with you early in the project to develop engineered fenestration solutions that meet your performance and load requirements without compromising your design vision. Plus, the beautiful wood interiors provide a unique design aesthetic.

    Typical Elevation



    View Comprehensive Design Recommendations for Window and Door Combinations


    Design Recommendations

    Window walls may include a combination of windows and doors that require reinforcing mullions, expansion mullions, and subsills to resist wind loads while providing adequate water management.

    Technical Downloads


    New Construction Combinations

    This section explores the opportunities, requirements and limitations related to joining various combinations of standard Pella aluminum-clad wood windows and doors.




    Typical Window and Door Combinations

    Specific accessories and construction details must address the various conditions that are critical for the proper design of combinations of windows and doors such as

    • Proper flashing
    • Control joints to accommodate expansion and contraction
    • Intermediate structural support
    • Mullion reinforcing and its end anchorage to the rough opening
    • Rough opening wall construction to accept loads transferred from window combination


    View Comprehensive Design Recommendations for Window and Door Combinations

    View Combination Size Tables


    Mullion Design

    Placing windows and doors in a combination creates joints or mullions that may need structural reinforcing. Spread mullions can also be utilized to achieve an aesthetic element. In order to ensure that a given combination will withstand the design pressure, use the reinforcing tables on the following pages. These tables are organized by joint type and assembly type (factory vs. non-factory assembled). Use the graphical representation of each joint type to determine which joint type(s) are contained within the combination. The reinforcing tables consider structural performance only. See the Size and Performance Data page within each product section for single unit performance class and grade ratings.


    IMPORTANT: Determining and meeting the structural load requirements and design of the rough opening is the responsibility of the architect or engineer. Window and door frame systems are not designed to support additional elements or components of the building wall system.


    Combinations


  • Mullion CAD Details


  • New Construction Exterior Trim Options

    Exterior trim options are designed to compliment Pella's wood and aluminum-clad wood product lines. Available in a wide variety of standard and custom profiles, they give you the ability to create distinctive architectural details in wood or low-maintenance aluminum.



    ENDURACLAD® EXTERIOR TRIM

    Durable, Factory applied aluminum trim

    • Prefinished with Pella's tough EnduraClad finish; matches Pella products
    • Brickmould or 3-1/2" brickmould, 3-1/2" flat, Jefferson or Monroe profiles
    • Several sill nose options
    • Custom profiles available
    • Designed for aluminum-clad wood windows and doors


    Trim Profiles


    Sill Profiles


    Head Detail


  • Installation Details
      EnduraClad® Factory-Applied Trim in Brick Veneer Applications DWG | DXF
      EnduraClad Factory-Applied Trim in Replacement Applications DWG | DXF
      EnduraClad Factory-Applied Trim in Siding Applications DWG | DXF
      EnduraClad Factory-Applied Trim Profiles DWG | DXF



  • FRAME EXPANDER

    Durable, snap-in trim that is adjustable to field conditions

    • Prefinished; matches Pella products
    • Provides the look of flat trim
    • Aluminum brickmould can be attached to re-create the look of historical wood brickmould
    • No metal brake required
    • Cut-to-length kits, 96" or 144" lengths
    • Available in widths from 1" to 6"
    • Receptors are available to provide a finished edge


    Frame Expanders


    Alumminum Brickmould with Clip


    Head Detail


    AZEK® TRIM SURROUNDS

    Decay-resistant PVC trim, field-cut or factory-assembled materials

    • Ready for site finishing
    • Cellular PVC material that's impervious to insects and moisture
    • Preassembled surrounds or 9' lengths
    • 4" or 5" flat trim, or 2" brickmould with sill nose


    Trim Profiles


    Sill Profiles


    Head Detail


  • AZEK Trim Installation Details
      2" Brickmould with Sill for Casement DWG | DXF
      2" Brickmould with Sill for Double-Hung DWG | DXF
      Flat Casing with Sill and Crown for Casement DWG | DXF
      Flat Casing with Sill and Crown for Double-Hung with Brick Veneer DWG | DXF
      Flat Casing with Sill and Crown for Double-Hung with Wood Siding DWG | DXF



  • ROUGH/SMOOTH WOOD

    Field-cut, protected, reversible wood trim

    • Primed and ready for site finishing
    • Grained or smooth appearance
    • 10' lengths
    • 3-1/2" or 5" flat widths, 3/4" thickness


    Trim Profiles


    Head Detail


    WOOD BRICKMOULD

    Wood brickmould available factory-applied or in lineal lengths

    • Available in primed Pine or Mahogany; ready for site finishing
    • Straight or curved
    • 1-7/8" or 3-1/2" brickmould or flat trim with 1-1/2" or 1-7/8" sill nose/subsill
    • Standard and custom profiles available
    • Designed for wood exterior windows and doors only


    Trim Profiles


    Sill Profiles


    Head Detail


  • Installation Details




  • TRADITIONAL TRIM

    Durable, field-cut aluminum snap-in trim

    • Prefinished; matches window frame
    • 96" or 144" lengths
    • 3" flat or 1-1/2" brickmould
    • Custom brickmould profiles available
    • Straight or curved



    Trim Profiles


    Sill Profiles


    Head Detail


    Interior Trim Options

    The industry's most popular wood interior trim styles provide a vast range of options that are true to a home's architectural style and decor.

    • All profiles are available in Pine; select profiles are available in Oak
    • Pine trim styles are available prefinished in 8 stain colors or 4 paint colors, or unfinished
    • Oak trim styles are available prefinished with 8 stain colors or unfinished

    Wood interior trim from Pella is available two ways:

    Trim ordered by the lineal foot

    • Ready for cutting and installation at the job site
    • Curved trim is ready to be trimmed to fit on the jobsite, and works with many curved openings (windows, doors and transoms)
    • Can be ordered separately

    Pella's exclusive Ready Trim, Ready Trim Plus and Ready Trim Knockdown trim kits.

    • Convenient and flexible options to fit your job's requirements
    • Work with Pella wood, fiberglass and vinyl windows
    • Work for many rectangular openings
    • Ready Trim Knockdown can be ordered on select wood entry doors and patio doors
    • Must be ordered with the unit


    Ready Trim

    Field Applied, Designed for all Pella windows and doors


    Ready Trim

    • For use with or without Jamb Extensions
    • 4 pieces of trim, Pre-Assembled
    • Packaged by unit

    Ready Trim Plus

    • Save time when Jamb Extensions are needed
    • 4 pieces of trim, 4 Jamb Extensions, 4 Cover Strips, Pre-Assembled
    • Packaged by unit
    • Optional Stool and Apron available

    Ready Trim Knockdown

    • Pre-measured and kitted to save time
    • 4 pieces of trim with 10" excess
    • Unassembled and unmitered
    • Kitted by order

    Ready Trim Plus Knockdown

    • Pre-measured and kitted to save time
    • 4 pieces of trim with 10" excess
    • Unassembled and unmitered
    • Optional Stool (with 14" excess) and Apron available
    • Kitted by order

    Trim Styles Available

    All profiles and accessories are available in Pine; select profiles and accessories are available in Oak.

    Colonial
    Simplicity and symmetry authentic to the traditional style

    Craftsman
    Lasting influence and attention to detail mold the decorative features

    Provincial
    Curved arches and soft lines create stylish effects from the simple to the extravagant

    Ranch
    Smooth transitions and a long, low profile highlight the style options

    Accessories

    Coordinate accessory trim to accents in the home with these beautiful choices.

    Stops

    Lattices

    Stools

    Quarter Rounds

    Trim

    Renovation Complete Tear-Out of Existing Frame and Sash

    Complete Tear-Out of Existing Sash and Frames

    Applicable when a complete tear-out is necessary for historical, aesthetic or structural considerations.

    • Custom-size units available
    • Good for virtually any existing opening

    Depending on the needs of the project, wood or aluminum-clad wood windows can be used to replace existing wood or metal windows when a complete tear-out of the existing frame and sash is required


    Replace with Aluminum-Clad Wood Windows and Frame Expanders

    There are many options available for replacing the existing wood or metal windows with aluminum-clad wood windows. One approach is to replace the existing frames with wood blocking and cover the blocking on the exterior with the Pella Frame Expander System.

    • It provides an economical method for replacing old wood or metal windows
    • Pella aluminum-clad windows and doors have an accessory groove that allows for the use of the frame expander system
    • Made of low-maintenance aluminum cladding that perfectly matches Pella products, these frame expanders can be used to cover the new blocking
    • Windows need to be accessible from the exterior to use this type of installation


    Replace with Aluminum-Clad Wood Windows and Brickmould


    Replace with Aluminum-Clad Wood Windows, Receptor and Subsill

    A second approach is to replace the existing wood or metal windows with aluminum-clad wood windows and a Pella receptor and subsill system. Receptors are often used for multistory buildings requiring installation from the interior or when a more robust installation method is desired.


    Replace with Wood Windows

    There are also many options available for replacing the existing wood windows with new wood windows. One approach that involved a complete tear-out of the existing wood windows is shown below. The details for both the existing wood windows and the new wood windows are included.

    • The first step is to replace the existing wood frames with new treated wood blocking at the head and jambs
    • Then the new wood window can be attached to the blocking with clips or anchored to the blocking through the window frame


    Renovation Retain Existing Frame and Replace Sash

    In contrast to the complete tear-out approach, the more commonly used approach to window replacement recognizes that the frame and trim that is already installed in the exterior wall may still be fully serviceable, but the operable or fixed sash may need replacing.

    • It saves on the labor costs associated with the complete tear out approach, but also assumes that other considerations can be met through the re-use of the existing frame and trim
    • Reuse may enhance historic or maintenance considerations depending on the project
    • Pella offers a variety of installation systems designed to accommodate this approach


    Replacement of Sash Only Using Pocket Installation


    Applicable when the existing frames are in good condition and only the sash needs to be replaced.

    • Fully assembled Precision Fit® double-hung, casement, awning and fixed windows
    • Slides easily into existing pocket
    • Trim, wall coverings, paint and plaster are usually not disturbed
    • Reduces cost and inconvenience compared to a complete tear-out

    Installation Details





    Replacement of Sash Only Using Standard Subframe System

    Applicable when replacing wood windows.

    • Aluminum subframe is preassembled and installed into openings
    • Conceals existing wood window frame to become "receptor" for new window
    • Allows installation from inside building
    • Reduces labor costs and eliminates need for exterior scaffolding and its expense


    Installation Details

    Download 2D CAD Detail - DWG or DXF


    Replacement of Sash Only Using T-Subframe System

    Applicable when replacing metal windows.

    • Aluminum subframe is preassembled and installed into openings
    • Conceals existing wood window frame to become "receptor" for new window
    • Allows installation from inside building
    • Reduces labor costs and eliminates need for exterior scaffolding and its expense


    Installation Details

    Download 2D CAD Detail - DWG or DXF


    Profiled Receptor

    Applicable when replacing wood or metal windows.

    • Profile of subframe typically matches profile of existing window frame and brickmould
    • Aluminum subframe is preassembled and installed into openings
    • Conceals existing wood or metal window frame to become "receptor" for new window
    • Allows installation from inside building
    • Reduces labor costs and eliminates need for exterior scaffolding and its expense



    Installation Accessories for Standard Subframe and T-Subframe

    Subframe Expander

    Subframe expanders are used to expand the width of the subframe flange and are often used on curve-top window openings with rectangular windows.


    Subframe Mullion Trim

    When there are several window openings in a row, the mullion detail shown below can be used to enable the use of subframes in all of the openings while covering the exposed wood between subframes.




    Aluminum brickmoulds can be added to the face of the subframe flange to match the profile of the historic wood brickmould.



    Field Measurement Guides


    • Field measurement guides are available for window replacement projects where only the window sashes are removed and the existing frame is left in place
    • These guides identify the important dimensions required to design the window replacement solution
    • Guides are available for existing wood and metal windows


    Replacement and Renovation Systems Overview PDF


    Technical Documents Technical Downloads

    Technical Downloads



    Combinations

    Installation Details

    Installation Accessories

    • Overview PDF

    • Clad Parts
        Bay or Bow Mullion Accessories DWG | DXF
        commercial Replacement and Field-Applied Trim Accessories DWG | DXF
        Custom/Special Accessories DWG | DXF
        EnduraClad® Factory-Applied Trim in Brick Veneer Applications DWG | DXF
        EnduraClad Factory-Applied Trim in Replacement Applications DWG | DXF
        EnduraClad Factory-Applied Trim in Siding Applications DWG | DXF
        EnduraClad Factory-Applied Trim Profiles DWG | DXF
        Interior Casing Profiles DWG | DXF
        Exterior Mullion Covers DWG | DXF
        Interior Mullion Covers DWG | DXF
        Mullion Reinforcements DWG | DXF
        Stools, Stops and Trim DWG | DXF
        Window Attachments, Patio Door Sill Support, Frame Expanders and Receptor, Wood Sill Plates for Clad Windows, Subsills DWG | DXF
    • Wood Parts
    • AZEK Trim
        2" Brickmould with Sill for Casement DWG | DXF
        2" Brickmould with Sill for Double-Hung DWG | DXF
        Flat Casing with Sill and Crown for Casement DWG | DXF
        Flat Casing with Sill and Crown for Double-Hung with Brick Veneer DWG | DXF
        Flat Casing with Sill and Crown for Double-Hung with Wood Siding DWG | DXF

    Replacement and Renovation Systems



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