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
i did hear enough to determine that one side has foil, which must face
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.
The information I have says it matters little whether the shiny part
faces up or down, out or in. It also matters little if the surface
gets dirty. Research is still being done, but recent studies are more
favorable than early studies. It is hard to keep up with all the
information on them. Even installed wrong they still work, just not as
well as when installed properly.
- posted on October 4, 2005, 12:42 pm
Probably the best attic radiant barrier is light-colored roofing, to
reduce IR transmission where it matters most.
With adequate insulation & sealing below, and ventilation of attic
space. Ventilation to dissipate summer heating, and prevent snow-melt
and ice-dams in winter.