Ive just had a new plasterboard wall fitted and its been skimmed, im going to tile it do i have to gouge it to help the tiles stick. Seems a shame. Whats the best preperation for the wall before tiling. The plaster will have been on a week this friday 16/sept/05 how long should i leave it before tiling. When answering that last question please bear in mind this job has been going on since the start of aug and the better half is getting restless