I have done a lot of research on this subject. And I found an old post from a commercial roofer saying he wanted to use rubber roofing material for his decking. He was pretty much ridiculed for this idea , and there was reference made to a rubber door mat on a deck that rotted. I am thinking of doing the same thing, and I fail to realize how this would not work as good or better than Marine vinyl flooring. They both still have to be put down with adhesive, and the argument was that the plywood could not breathe. I am assuming that since both have to be adhered to ?the deck how would the Marine vinyl breathe more than rubber roofing