When I first started out in roofing in 1979 I was but a mere twig of a lad. Jimmy Carter was in the White House and Decra Tiles were all the rage. They were lightweight, fireproof, had a great wind rating and could be installed over existing shingle roofs without tearing off. So why didn't take over the roofing world? They would dent easily when walked on, or coconuts fell on them in the high wind. Even so, they hardly ever leaked and seemed to last forever, if you just kept popping out those dents. Today, they are much more walkable and should be seriously considered, in my opinion, when shopping for sloped roof. Thumbs up!