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INSTALLATION INSTRUCTION -  

INSTRUCCIONES DE INSTALACIÓN  

FOR SQUARE DESIGN BAY AND BOW WINDOW 

WITH SEAT BOARD 

Part Number: 81470102

© 2009 Pella Corporation

Read these instructions thoroughly before performing any steps.

Note: These instructions may be used for Square Design Pella Bay and Bow windows that 
have a head and seat board. Support cables are installed in factory assembled bay and bow 
combinations.

Caution: The factory-installed support cables must be attached to members capable of 
supporting 1,300 lbs. If the members are not capable of supporting 1,300 lbs., knee braces 
must be used in addition to the cables. Bay and bow units are not intended to support any 
roof structure. Consult an architect, engineer or construction professional if the ability of the 
members to support the bay or bow is not known.

Installation Instructions for Typical Wood Frame Construction.
These instructions were developed and tested for use with typical wood frame wall 
construction in a wall system designed to manage water. 

These instructions are not to be 

used with any other construction method.

 Installation instructions for use with other 

construction methods, multiple units or other bow and bay windows, may be obtained 
from Pella Corporation, a local Pella retailer, or by visiting http://www.pella.com. Building 
designs, construction methods, building materials, and site conditions unique to your project 
may require an installation method different from these instructions and additional care. 
Determining the appropriate installation method is the responsibility of you, your architect, 
or construction professional. 

Always read the Pella

®

 Limited Warranty before purchasing or installing Pella products. By 

installing this product, you are acknowledging that this Limited Warranty is part of the terms of the 
sale. Failure to comply with all Pella installation and maintenance instructions may void your Pella 
product warranty. See Limited Warranty for complete details at http://warranty.pella.com.

Cable clamps

Flashing tape #1 

Flashing tape #2 

Jamb covers

Knee braces

Head frame

expander

(2-1/2" Wide)

Lea las instrucciones en español en el reverso.

Summary of Contents for 81470102

Page 1: ...ion in a wall system designed to manage water These instructions are not to be used with any other construction method Installation instructions for use with other construction methods multiple units...

Page 2: ...knife Drill with a 2 Phillips at least 4 long and 3 square drive bit provided in cable clamp kit 1 2 open end wrench 3 16 wrench or socket Sealant Gun Installation will require two or more persons for...

Page 3: ...k and rough opening Apply sealant at each joint between the brick blocking and rough opening and cover the joints with flashing tape H Apply sill flashing tape 1 Wood wall construction only Cut a piec...

Page 4: ...tape 2 Cut a piece of flashing tape 12 longer than the opening width Apply at the bottom overlapping tape 1 by at least 1 DO NOT allow the tape to extend past the interior face of the opening Note The...

Page 5: ...Check window for squareness by making sure diagonal measurement for corner to corner is within 1 8 in both directions Insert a 10 x 3 flat head wood screw into each pre drilled hole in the jamb boards...

Page 6: ...etween the rafter tails directly above the cable holes in the bay bow head board B Remove the cable from the bay bow unit Measure the distance from the bottom of the cable clamp to the bottom of the h...

Page 7: ...put on the seat board knee braces must be used in addition to the cables HEAD BOARD SEAT BOARD 18 PROJECTION MAXIMUM DASHED LINES INDICATE POSSIBLE CONSTRUCTION FOR GABLE ROOF MINIMUM 10 1 2 HEADER MO...

Page 8: ...space between the window and the rough opening and apply a 1 deep bead of foam This will allow room for expansion of the foam and will minimize squeeze out If using foam other than Great Stuff Window...

Page 9: ...Foam BRICK FRAMED REPLACEMENT 3 8 Clearance Backer Rod and Sealant typical Insulating Foam BRICK SMALL BLOCK REPLACEMENT Air Gap Block 1 x 2 Sheet Rock Lathe Plaster Insulating Foam 3 8 Clearance Bac...

Page 10: ...ween the frame expander and the under side of the seat board F Shape tool and clean excess sealant When finished the sealant should be the shape of an hourglass Note This method creates a more flexibl...

Page 11: ...cess sealant When finished the sealant should be the shape of an hourglass Note Backer rod adds shape and depth for the sealant line This method creates a more flexible sealant line capable of expandi...

Page 12: ...construction and maintenance failure to install Pella products in accordance with Pella installation instructions or the use of Pella products in wall systems which do not allow for proper management...

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