5INTERIOR 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. Insulate between new frame and the existing frame with | &95&3*03 | |
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ORZH[SDQVLRQLQVXODWLQJIRDP)5207+((;7(5,25 |
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will allow room for the expansion of the foam and will |
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minimize squeeze out. Follow foam manufacturer’s |
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instructions. If over filled with foam, the foam must |
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be trimmed back to allow room for backer rod and |
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sealant. |
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Note: It may be necessary to squeeze the end of | " | |
the tube with pliers to be able to insert into the | ||
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space between the window frame and the rough |
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opening. |
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Note: Masking between the window and the existing interior stop will help alleviate possible squeeze out of the expandable foam to the interior.
B.Check the window operation YHQWXQLWVRQO\ E\RSHQLQJDQGFORVLQJWKHZLQGRZ
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.
C.Inspect the interior and carefully trim all excess foam sealant if needed.
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D. Insert jamb hole plugs SURYLGHG LQWRHDFKVFUHZKROH | 5D |
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Jamb
plug
6EXTERIOR SEAL
A.Insert backer rod into the space around the window at the head and jambs. This should provide at
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Note: Backer rod adds shape and depth for the sealant line.
B.Place a bead of sealant at the jambs and head between the existing window frame and the replacement window frame.
Caution: DO NOT seal the bottom exterior to allow for incidental water to weep.
C. Shape, tool, and clean excess sealant. When finished, the sealant should be the shape of an hourglass.
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Note: This method creates a more flexible sealant line capable of expanding and contracting.
