US Patent 11781311 Tile setting structure and method of setting tile

A method of setting tile includes constructing a floor panel and a plurality of wall panels and attaching each of the plurality of wall panels to either the floor panel or one of the other wall panels with a waterproof caulk. Each of the wall panels includes a first rigid layer, a second rigid layer attached to the first rigid layer by a thinset mortar, and a waterproofing layer formed of a flexible material and attached to the second rigid layer by the thinset mortar.