> 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?