Hi all. My daughter has decided that she wants a new bathroom so its been gutted, and although I have been tiling for a good many years they have only been small areas; so advice is needed The bathroom is 2.1m (7ft) square, with wooden floorboards. The east wall is a stud wall, the north and west walls are brick, the south wall is stud with the door frame. The bath is along the west wall with the shower in the south-west corner. So bearing in mind that all the walls will be tiled the questions are: can I use plain plasterboard for the walls? is dot'n'dab acceptable for the brick walls or do they need to be screwed to the brickwork? what backer-board for the shower area? on the west wall how far from the corner of the bath do I put the backer-board? do I put the units in before I tile or after? do I have to use flexible adhesive and grout? The floor will be tiled but without UFH. It has lots of boards that have been cut: should I take up all the floorboards and replace with ply, if so is 18mm ok? is waterproof mdf an alternative? should I just board over the floorboards, if so what thickness? I know I have to use flexible adhesive and grout on the floor. Any other advice?