If the tiles are being removed due to one or two being cracked or damaged,
it may be advisable to replace the damaged tiles, see
Replacing a damaged ceramic tile for more details.
If the surface is going to be re-tiled, it may prove easier to tile over
the original tiles. Old, firm, established tiling is a good surface to
tile over. Remove all 'furniture' before commencing. Check that the extra
thickness doesn't interfere with any fittings already in place.
