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Why do not you just use what is supposed to be on a garage door?
http://www.garagedoorsupply.com/insulation.html
<sblanky@gmail.com> wrote in message
news:1160879435.057453.27770@i3g2000cwc.googlegroups.com...
> Went to the local home improvement store to investigate possible
> approaches to insulate my steel garage door. One option is a sort of
> buble wrap stuff with foil on both sides, that's supposed to be a very
> good reflective barrier. The other option is poly-foam of varying
> thickness.
>
> I live in southwest ohio, where dec-feb have mostly sub-freezing days,
> and the coldest days can get down to single digits or below zero... in
> summer, weeks of 90s are normal.
>
> My garage door is souther facing.
>
> My question is this: foil, foam, or some combination of the two? And,
> if you recommend a combination, which one against the steel door, which
> exposed to the open space of the garage?
>
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