Recently, I watched the “Home Again” series dealing with an addition to a ranch house in Wayland, Massachusetts. I was especially interested in seeing how the floor of a second floor deck was going to be constructed. I saw the episode where roofers installed a waterproof rubber material on the deck floor. Wood flooring was to be installed over this material. I missed the next few episodes so I didn’t see how this was done. Can anyone fill me in? Thanks.