roof strength

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U.S. rooftops get a thumbs-up for solar after Sandia testing

April 14, 2016 • ALBUQUERQUE, N.M. — Most U.S. rooftops in good repair can take the weight of solar photovoltaic (PV) systems. That’s the conclusion of a three-year study by a research team led by Sandia National Laboratories. “There is a misperception in the building industry that existing residential rooftops lack the strength to...