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Insulating garage doors

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ahofle:
Do you guys recommend any particular foam insulation?  The guy in the article used 3/4" foam sheets doubled up (he had 1.5" of space to insert the foam).  I see other guys saying they used regular insulation plus a sheet of the thin foam to hold it in.  I was just planning on just cruising around the hardware store until I found something that would work.

SavannahLion:
I guess the white styro-foam-like material is what you would want to look for. IIRC, Home Depot actually sells a package of foam panels specifically sized to fit inside those doors. Personally, I think they charge a bit too much just to have precut foam, but I guess if you calculate the inevitable waste from cutting your own it turns out to be a moot point.

In any case, if you're interested in that, HD usually keeps it either right next to the home insulation or in the isle where they model garage door openers.

paigeoliver:
Just call a few garage door places and see how much they want for the real stuff. It can't be that high, I only recall there being about a $70 difference in price between an insulated garage door and a non insulated one (about 12 years ago) and that was with us installing the insulation.

ahofle:
I just thought I'd bump this to follow up with some results.  I can't believe how much cooler the garage is this summer so far.  I also noticed a pretty significant difference in the winter, although it's much harder to keep the cold completely out with opening and shutting it frequently.  I highly recommend this inexpensive improvement for people with metal garage doors.  I ended up using the 8x4 sheets of insulation with foil on both sides (they have it at Home Depot).  Oh and be sure and have the garage door spring tension adjusted afterwards as it does add a little bit of extra weight.

FrizzleFried:
Measure how thick of a "rail" you have.  Mine was 1" thick so i just installed 3/4" myself.  It DOES add weight,  but not enough to make it an issue.

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