Bathroom refurbishment. Old tiles were tiled directly onto plasterboard, which is not good for wet areas. This also means when tiles are removed it pulls off the whole plasterboard. We fitted water resistant hardy backer boards to tile onto. We took the opportunity to insulate this Dorma bathroom at the same time, vastly increasing the warmth of the room and efficiency. Two tone porcelain tiles made for a swanky finish without costing too much!