Hi

I'm in the process of refitting my bathroom and am seeking some tiling
advice.

Three of the walls have new unskimmed plasterboard, and the fourth wall
is made of ply (it conceals pipework and a cistern for the wall hung
WC).

Is it OK to tile directly onto these surfaces? If so, what preparation
is recommended. Finally, could someone suggest the best tile adhesive
to use?

Many thanks,

Steve