Pella Bay and Bow window with seat board 80AT0102 User Manual

Page 7

Frame

expander

Mark frame expander at

the center of the wedge

Center frame expander

Notch out

1/4”

Install wood blocking between the top of the window and the soffit as shown. The

blocking should be flush with the exterior of the window frame.

Notch the retainer leg of the top and bottom frame expanders. Hold the frame expander

so it is centered on the center window, and mark the frame expander at the center of the

wedge that is between the windows. Cut a 1/4" wide notch out of the retainer leg to allow

the frame expander to bend and attach to the flanker windows.

Backer rod

and sealant

Double-hung bay window

Accessory groove

Exterior jamb cover

Sealant

Apply a bead of sealant on the leg of the head frame

expander and install by tapping on using a block of

wood with rounded edges and a hammer.

Install the bottom frame expander by tapping on with

a block of wood with rounded edges and a hammer.

Insert backer rod into the space between the jamb cover

and the exterior finish material as deep as it will go. Apply

a bead of high quality exterior grade sealant on top of the

backer rod. Shape, tool and clean excess 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 expanding and contracting.

Apply a corner bead of sealant across the top of the head

frame expander. Shape, tool and clean excess sealant.

Install the interior jamb extensions (provided).

Install roofing material per the manufacturer’s instructions.