4 Apply exterior perimeter sealant
A.Place a corner bead of sealant on the edge of the window flush flange on top, sides and bottom to the stucco. Leave a 2" gap in the sealant bead at the bottom, corresponding to the weep hole locations in the existing aluminum window frame.
Exterior
4A
2"
5 Interior seal
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.
A.Apply insulating foam sealant. From the interior, insert the nozzle of the applicator approximately 1" deep into the space between the window frame (not jamb extension) and rough opening and apply a 1" deep bead of foam. This will allow room for expansion of the foam and will minimize
5A |
Note: It may be necessary to squeeze the end of the tube with pliers to be able to insert into the space between the window frame and the rough opening. DO NOT completely fill the space from the back of the flange to the interior face of the window
B.Check the window operation (vent units only) by opening and closing the window.
Note: If the window does not operate correctly, check to make sure it is still plumb, level, square, and the jambs are not bowed. If adjustments are required, remove the foam with a serrated knife. Adjust the shims and reapply the insulating foam sealant.
Interior Finish or Trim:
The space between the new window and the existing window’s frame will need to be covered
with trim. There are many ways to accomplish this and each case can be unique. How this is
done will be the decision of the homeowner or window installer. A few possibilities include using cove, quarter round, or a stop moulding.
