5/15/2014
White roof with the cloudy blue sky
Black_Kira

White roofs are becoming more widespread in Portland, Ore., as they help buildings save on energy costs. Cool roofs can reduce energy needs for air conditioning by 5% to 10% on sloped roofs, and 20% on flat ones, said Kurt Shickman, executive director of the Global Cool Cities Alliance. They also help maximize the performance of solar panels.

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