Yesterday I was removing a cupboard from my bathroom in preparation for retiling the walls. Got one side of the cupboard off OK but the other side had been heavily glued to the tiles and when I took it off a 2 foot high by 1 foot wide section of tiles came off with it. Underneath is a solid plastered wall not plasterboard.
I will be tiling over the existing tiles so what is the best method to make this "hole" good and level with the surrounding tiles before the new tiles are added? Is plastering the gap OK, will the new tiles adhere OK to the new plaster which will be on top of the old plaster? Should I prepare the wall with PVA?
Thanks