Quote:
Originally Posted by ICanHas
The radiant heat transfer is dependent on the temperature difference and I think emissivity, reflectance and transparency. If you could somehow use radiant barrier on the roof, I speculate it woulId be an order of magnitude more effective. Maybe I'll test this out in my with the shield inside vs outside the windshield. I wonder why roof materials are usually black.
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There was a study in florida years ago that measured identical houses, some with black shingles and some with the same shingles painted white. The cooling load with white shingles was 40% lower. I have no idea of the rest of the study as I have been watching these for 30 years. I do believe it was in a magazine called "Home Energy".