I got several calls and emails from last week’s post about installing radiant barrier under shingles. It seems that I’ve kinda stirred up a hornet’s nest of sorts. One roofer was grateful for “Saving” him from making a big mistake. Another guy was down-right mad. He said I didn’t know what I was talking about and that these products reflected heat because they are white or reflective to light on one side. If you put white/foil or ANY reflective material on TOP of the roof, then yes it would help. Under the shingles, conductive heat does not know what color something is.
Here is a video I made to illustrate how without an air space you can never have radiant heat.
Looking for more videos on this topic? Check out my posts below.