Nice Install, and Waterproof
I had a concrete slab already to install these on (I bought two) and even with a little slant to the surface they both went up fine. They were right in front of a block wall and I needed to make them waterproof so a gutter went up between the two. Also, I put some six mil plastic underneath the floor of the sheds as well as beneath the tiles for the ceiling (but over the rafters). I also recommend a floor kit on top of ¾ inch exterior plywood. All in all the job only needed a fifty foot roll of plastic to keep it dry, as several days of fog and rain have not been able to make the interior wet. One problem is that the metal is very thin so it can dent without much pressure put on it. I recommend not completely tightening any fasteners until it is mostly assembled.