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Originally Posted by ldjessee
I have heard (not researched, just kind of like rumors) that the new white metal roofs are better for efficiency.
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Yes, it's true, light-colored metal "pro-panel" roofs can be MUCH more efficient at reflecting heat than a asphalt shingle roof. The important number to look for is SRI (Solar Reflectance Index) and the higher the number the better.
Quote:
Originally Posted by ldjessee
Is the white metal roof more efficient in both winter and summer? Compared to just dark colored shingles?
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Attics should be well insulated to minimize heat loss and/or gain in the home. Given that heat rises, heating your house via a dark roof surface would be very inefficient and very difficult to control at best. A hot attic will heat a home in the summer, accelerate the aging of the roof deck and can cause ice damming and water damage in the winter.
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Originally Posted by ldjessee
What about noise during heavy rain storms?
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There has been no noticeable difference in noise in our home.
Here is some of the research I did on the advantages of a cool roof -
Cool Roof: Pro-Panel vs. Asphalt Shingle | EcoNewMexico.com