During summer heat air conditioners are used extensively and this can increased energy consumption can be crippling. Black outs occur in the summer thanks to people cooling their homes and workplaces – but these power issues can be avoided. By simply painting roofs white it can help cool buildings and lower energy bills. Painting multiple roofs white can a really positive effect on a large area.
They found that urban expansion alone could increase summer temperatures by up to 6°F in some areas in addition to greenhouse gas-induced warming by 2100. The Mid-Atlantic and Midwest seeing the biggest overall summer temperature increases.
In all areas, white roofs could completely offset the combined increase in temperatures, and if deployed across the entire megapolitan area, could actually reduce summer temperatures compared to the 1990-2010 average.
The benefits of cool roofs were particularly prominent for the urban areas stretching from Washington, D.C. to New York, Chicago and Detroit, and California’s Central Valley.
Cooler summertime temperatures could reduce demand for air conditioning, which could both save money and reduce the chances of electricity grid blackouts.