Quote:
Originally Posted by sid
Radiant barriers don't work unless there is an air space on the reflective side. Most references I've read recommend at least a 3/4 inch air space. For a roof, it is recommended that the reflective side face down so that dirt doesn't settle on it and degrade the radiant barrier with time.
Check out this Florida Solar Energy Center publication for more info: FSEC-EN-15 |
I'm getting a barrier that's reflective on both sides which will help in the winter by reflecting the heat back into the house and in the summer by reflecting heat away. I've talked with several contractors who sell/install radiant barrier and they have all told me the air space can be on either side of the barrier. I'm aware you need an air space so I'm going to put the barrier down, have perlins placed directly over the barrier which will give me approximately a 1" air space then have the metal roof attached to the perlins.
Here is the barrier I'm getting. The price is $116. per 1000 sf roll including shipping which was the best price I was able to find, most other companies were anywhere from $130-$150 + shipping for the same weight in case anyone else is interested in buying any.