You might want to consider using GAF "Cool Colors" shingles, which are
intended to reflect heat. From the street the "Cool Colors Antique
Slate" looks about the same as "Fox Hill Gray" but from the peak of
the roof they look downright metallic.
As far as putting anything under the shingles, there is insulation
that can go there, but I believe that you have to do a tearoff to
The heat that radiates into your attic does heat your house. But it
simultaneously cools the roof. If the heat didn't dissapate, your shingles
would turn to a liquid, run off the roof, and kill your grass.
Lighter colored shingles might help reflect the heat but they show stains
Drive around your town and look at the light-colored shingles (if you can
find any). You may live in an area where there is not much soot and exhaust
particulates in the air. If so, light-colored shingles may work for you.
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