How to prepare surfaces for tiling above bath

[Barney_Bubble]

Hi

I am about to start my first ever tiling job this weekend and have been given lots of conflicting advice from friends.

I want to tile above the bath to the ceiling and turn it into a shower/bath.

Currently there is one row of tiles which I want to get rid of and the rest of the wall is painted. Do I need to prepare the painted surface with some waterproofing or primer if so what should I use? Also I'm expecting that when
I chip the old tiles off I will be left with plaster. How do I prepare this?

I tested the paint using a strip of tape overnight and it didn't flake off so I guess the paint is OK to hold the tiles.

Thanks for any help.

BB

[Tilestiles]

Always rough up or remove the paint completely if possible. Also if in doubt, prime it out!! Use APD primer too not PDA. Hope this helps!!