I was removing the tiles in the bathroom ready for a total re-vamp when the render behind the tiles came off with them, understandably I am mildly panicked!! Can anyone recommend either aquaboard or plasterboard to fix said massive hole (right down to the brickwork) also I will be tiling on to the existing walls all the way round, will it be ok to do this? The tiles are large and porcelain and I would be mortified to break 1 or maybe 2, possibly 3...................................