Originally Posted by mscg

I have a bathroom to tile out to travertine. The external wall is exposed stone, very irregular and papered over and painted. Could any one suggest the best means of building the wall out to give a level finish to tile onto. Intending to use Benfer cement based adhesive. Would browning or sand / cement be ok - or another product. Probably going to be max 3inches deep at deepest point. Many thanks