I am a homeowner in New York, with a flat roll roof. Lots of people here are applying the elastomeric white coating on their roofs. For me the coating will cost around $500. I am wondering if people think it’s worth it, in terms of savings on electricity – we run the ACs for 3-4 months – and extended roof life. The roof’s in good shape, no leaks, bubbles, or any other visible defect.