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Old 12-01-2010, 11:52 AM   #1
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Sealing around replacement windows


I have a condo with vinyl replacement windows installed many years ago by a fly-by-night contractor.

The building is brick veneer and the old windows were metal framed so the replacements sit inside of the metal frames and have plastic glued around all 4 sides to cover the mess. Some of the plastic has come loose and what I found was open space between the metal frame and the vinyl window, I can also feel air coming thru this space.

What do you use to seal this space? Spray foam sounds best since it will both seal the air and insulate, but it would take a whole can per window which could get expensive. I've heard of people shoving in fiberglass insulation, but that doesn't seal the air out, does it? And if you shove it in tight, you loose all insulating qualities.

Second, what type of glue should I use to glue these strips back to the face of the window to cover the gaps? I'll be caulking the outer edge to the window sill, but I need some type of glue to hold the strip to the window.

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Last edited by VersaBar; 12-01-2010 at 11:55 AM.
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Old 12-01-2010, 12:28 PM   #2
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Sealing around replacement windows


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Originally Posted by VersaBar View Post
I have a condo with vinyl replacement windows installed many years ago by a fly-by-night contractor.

The building is brick veneer and the old windows were metal framed so the replacements sit inside of the metal frames and have plastic glued around all 4 sides to cover the mess. Some of the plastic has come loose and what I found was open space between the metal frame and the vinyl window, I can also feel air coming thru this space.

What do you use to seal this space? Spray foam sounds best since it will both seal the air and insulate, but it would take a whole can per window which could get expensive. I've heard of people shoving in fiberglass insulation, but that doesn't seal the air out, does it? And if you shove it in tight, you loose all insulating qualities.

Second, what type of glue should I use to glue these strips back to the face of the window to cover the gaps? I'll be caulking the outer edge to the window sill, but I need some type of glue to hold the strip to the window.
A can of minimal expanding foam should certainly do more than one window. You can spray it in stages, letting it expand each time.
3M makes a great spray adhesive for the plastic, but you should use wide masking tape so you don't overspray

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