wall prep??

[frembrit]

Hi,
I am going to tile all around the bath tub upto the ceiling. I have removed the old tiles that were tiled only two rows high.
My query is that I have plasterboard walls and when I removed the old tiles, in places, some of the outer plasterboard (card bit - not sure on terminology here) has come off with the tile and old adhesive. It has not gone through to the plaster in the board. In other areas of the wall the plasterboard is fine but still with the old adhesive attached to it.
The area above the old tiles seems to have been skimmed and painted when the house was built.

Do I need to prepare the exposed card bit before I tile? and would I need to remove most of the old adhesive too?
Am I ok to tile directly onto the parts of the wall that is painted?

Thanks in advance.

 

[Thermo]

buy a decent exterior filler like tetrion or polyfilla and level up the dents with that. The smoother the surface the better the finish. so once you are done tile away!