Replacing wall tiles

[DangerMouse]

I'm about to embark on a tiling spree (or at least a tiler is on my behalf). My main concern however is what needs to be done after I take down old tiles and before I put up new ones. Is it likely that I'll have to bond the wall again or should it be ok? Is it advisable to place a thinn layer of plywood behind the new tiles first gluing it to the wall rather than rebonding? Any tips appreciated.

 

[DOBBER22]

Been there and done that in the bathroom and was advised by my tiler to do the following before he started.

Just remove any loose pieces of old grout with a paint scraper and then polybond to whole surface to seal it and to give the new tiles a good bond.
A good tiler will be able to level the wall surface with enough grout to cover up the old stuff leaving a perfect finish.

Good Luck

 

[DangerMouse]

great thanks