White roofs keep cities cooler – official

ERJ staff report (DS)

New York – A long term research project shows that pale roofing materials are better than dark-coloured ones. Research published in Environmental Research Letters reports on a long term test of city buildings roofed with TPO, EPDM and asphalt comparing the effects of high- and low-albedo (reflectivity) colourings.

The project took ordinary dark coatings on New York City buildings and painted them white. After three years, the researchers found, “The EPDM membrane shows evidence of low emissivity; however this had the interesting…

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