i was listening to a home improvement talk show recently and the narrator
kept recommending a 'radiant barrier' in the attic. since i didn't get to
listen to the complete show, i was never quite sure what was meant by a
'radiant barrier'.

i did hear enough to determine that one side has foil, which must face
downward.

is a 'radiant barrier' just a piece of foam insulation with foil on one
side?? or, is it something special that you must purchase?

what is meant by 'radiant barrier'??


i also believe that i heard him say that 'radiant barriers' were really not
effective in cold weather; mostly effective in hot weather.