Proper way to install windows...?

slowdowntohurryupFebruary 14, 2012

I know that is a very broad question/topic - yet we were checking out some "in the dry" houses and noticed that around some of the windows - the builders had either installed the window with fiberglass insulation around them or had just stuffed it around them. Initially wasnt too keen about this process and was wondering what the "above" standard is concerning installing windows. I was thinking that caulking would come into play somewhere (maybe they'll come back and caulk over..?


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We don't recommend the use of fiberglass insulation around window frames because fiberglass loses it's thermal advantages once it's compressed. We only use spray foam.

There's really no "standard" per se. Some contrators don't use anything at all and although we don't recommend that method as a general rule, it's something that should be discussed during the contractor interview process.

    Bookmark   February 14, 2012 at 11:12PM
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Windows on Washington Ltd

+1 to sky's advice.

Fiberglass is worthless because of its lack of R-Value and resistance to air movement.

Foam or sealant is the way to go. At the end of the day, it needs to be air tight whichever way you go.

    Bookmark   February 15, 2012 at 5:57AM
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thanks for the replies - that is along the lines of what i thought - was going to talk to the builder soon so we'll see what they say.

    Bookmark   February 15, 2012 at 2:04PM
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Also, check with the window manufacture. I know of at least 1 window company that states that if foam is used, it will void the warranty.

    Bookmark   February 15, 2012 at 2:30PM
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Windows on Washington Ltd

They are a dying breed but they are still out there.

    Bookmark   February 16, 2012 at 4:11PM
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