Insulating foam application – Pella Bay and Bow window with seat board 80AT0102 User Manual

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Caution: Ensure use of low pressure polyurethane window and door insulating foams

and strictly follow the foam manufacturer’s recommendations for application. Use of high

pressure foams or improper application of the foam may cause the window frame to bow and

hinder operation.

Apply insulating foam sealant (see Caution above).

From the exterior, insert the nozzle of the applicator

approximately 1" deep into the 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

insulating foam other than Great Stuff

™

Window

and Door Insulation Foam by the Dow chemical

Company, allow the foam to cure completely (usually

8 to 24 hours) before proceeding to the next step.
Note: It may be necessary to squeeze the end of the

tube with pliers to be able to insert into the space

between the jamb boards and the rough opening,

and between the head and seat board and the

rough opening.

Exterior

When applying siding, brick veneer or other exterior finish material, leave adequate space

between the jamb cover and the exterior finish material for sealant.

Install the exterior jamb covers onto the outer two

windows. Apply a bead of sealant to the edge of the

leg that will be driven into the accessory groove. Drive

the short leg into the accessory groove using a block of

wood with rounded edges and a hammer.

Nail the jamb covers to the wall using one nail on

each end, and one in the center.

Cut two pieces of flashing tape 6" longer than the

frame height of the window. Apply the flashing tape

3" above the top of the jamb cover, overlapping it onto

the water resistive barrier.

INSULATING FOAM APPLICATION

SeALING THe BAY/BOW UNIT TO THe eXTeRIOR

WALL CLADDING

Double-hung bay window

Accessory groove

Exterior jamb cover

Sealant

Exterior