Edit ConversationMark as UnreadStar ConversationLeave Conversation mickey bluActive Member Hi everyone need some advise please ! I have been asked to tile a floating floor ,solid concrete floor then polystyrene sheets with ply face . The customer wants underfloor heating fitted as well . Tiles will be a porcelain 600x600. 1.Hardi backer floor 2. lay underfloor heating 3.latex floor 4.Would you use ditra matting as well ? Any suggestions welcome thanks in advance .