I have a bathroom which has been created in a room which wasn`t previously
plastered (was dry lined with tongue & groove planks).
One wall is old brickwork (partly painted white with a chalky type
substance) and the other is breezeblock also painted white.
Question is, can I tile directly onto this or would the bare walls/mortar/
paint etc adversely affect the adhesive? If not, I can always get the walls
plastered...it will probably make life easier tiling anyway!