Thanks Moesha, I hadn't seen this thread until now.

Freedom is correct, that was marine grade carpeting over treated plywood on our enclosure.

Note however.... We have since removed the carpet and keep it in the garage until the cats are going to be in the enclosure. We found that marine grade carpet does not dry out very quickly after a rainstorm and will quickly rot the wood floor, or it grows algae if we have an extended rainy/humid weather pattern.

A bit of velcro or that no skid stuff for under chair cushions works good for keeping the carpet in place since it's no longer attatched.

BTW, sisal will rot if it's not able to get sunlight or plenty of air circulation. We had to replace the sisal we originally had, and have since moved the enclosure more out into the yard for air circulation and more sunlight.

As far as neighbors go, if it's a problem with nearby fenced dogs (as ours are) and a privacy fence isn't an option (in our case we have one), you could always put some lattice work on one side of the enclosure so the cats cat see the dogs as well, or plant a tree to block the view, or even totally wall off one side of the enclosure, but make sure it still gets sunlight and air circulation.