30 Sep '16, 11am

Researchers Find New Way to Keep Roofs Cool

Research at the Lawrence Berkeley National Laboratory holds the potential for a new type of dark reflective surface that will keep both buildings and vehicles cooler. Scientists experimenting with synthesized ruby crystals and pigments have shown that a dark roof coating can reflect heat as effectively as a white roof, the lab said in a news release . The research holds promise for reducing cooling loads in buildings and vehicles and mitigating the urban heat island effect, the collective heat generated by dark surfaces in a dense, urban environment. Researchers tested the idea by coloring cool roof coverings with ruby red, which the lab described as aluminum oxide doped with chromium. Then they synthesized ruby pigment to mix into coatings, and found that white surfaces treated with these paints stayed as cool as white materials. The results enhanced previous work to make...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/green-buil...

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