If I ever do any outside building, I'm going to use that plastic wood substitute. I've been told by a friend not to use the fiberglass stuff if you intend to lay on it to sunbathe.
Something like this:
http://www.plasticlumberyard.com/photogallery.htm
They are thinking this might be the last year for the McDonalds Air and Sea show in Ft. Lauderdale. Once they figure out a way to cover up the sky for those that aren't paying, revenues will increase and it will be back.