We apply a patented projected cork coating directly over your existing roof. The 1/8" inch coating can be applied over asphalt singles, tile and aluminum roofs. Environmentally Friendly The projected cork is non-toxic, low VOC and biodegradable. Additionally, with little to zero part of the old roof removed you are doing your part to reduce the waste in our landfills. Energy Savings The projected cork provides a waterproof thermal layer which helps aid in energy reduction and a lower utility bill.