With everything under the sun being labeled “smart” these days, it follows that smart roofs are in our near future. A smart roof coating made from waste cooking oil from fast food restaurants (minus the smell, of course) is being processed into a liquid polymer that hardens like plastic. When applied to roofing material, the coating switches roles from reflecting to transmitting heat by reading a thermometer. The coating can be adjusted to the location of the home. It is both nontoxic and nonflammable a…
