Preparing the walls for bathroom tiling

[plasteredric]

We're getting the bathroom tiled from floor to ceiling with ceramic tiles and its down to me to sort the walls out first.

The walls were previously tiled halfway up the wall and when these tiles were removed some of the plaster has come away (back to the brickwork in parts) and the remaining surface is pretty loose.

Any recommendations on how to sort this out ready to be tiled?
After reading the stickies and some other posts i am thinking it will be best to use a sand/cement render?

Any advise you can offer would be really appreciated

 

[tictic]

ok
take all the ..loose stuff off,and tap around this area with your knuckles listen for any hollow spots/sounds..if any take these out as well...

Ok
The area that you have now...how deep is it ..what size off area is it?..
What type and size off tiles do you want fixing to wall?

You can use a QSR ..(quick set render)...
You can tile within 24hrs...
If you go for old style render,..
then 4weeks...before fixing ..
What's the wall substrate ?

Ah..kinow...all this hassle for fixing some tiles tae a wall...

 

[plasteredric]

The walls are brick underneath with what looks like a cement render.

There's only a few square meters around the whole room that need sorting out and the depth from the brickwork to the solid areas of plaster is at most about 12-14mm.
I had thought about knocking most of it off and using aquapanel but don't think the depth will allow it though.

The tiles that are going on are 200mm x 350mm ish by 8mm thick.

With the areas of render that are sound to the brickwork, the surface is still loose. Would i be able to just rub off whats loose then use render over the top as essentially a skim coat?