Hello! We're in the bidding process, and interviewed a PB last night. We plan to put travertine pavers around our pool for decking, and had thought that we would lay concrete down first and then put the pavers on top. The PB recommended that we do a floating deck, with no concrete underneath. His reasoning was that the concrete could shift/crack over time due to ground movement. We're thinking that it would be more solid if we put concrete underneath, but wanted to see if there are any opinions out there? Maybe a floating deck is common and is just something we hadn't considered?