Most people probably don’t give a second thought to their roof until the electric bill shows up. A team led by Junqiao Wu at Lawrence Berkeley National Laboratory might have just found a way to shrink that bill. Researchers have developed a roof coating that keeps homes cooler in summer and warmer in winter without using extra power, according to a study published in the journal Science. The material, called a temperature-adaptive radiative coating, or TARC, has performed better in early tests than cool roofs already on the market.
How vanadium dioxide makes the switch
