I am re-tiling an old bathroom and the existing tiles have come off really easy - worryingly easy- leaving traces of the original adhesive. The wall surface is plaster on brick and probably original ( Victorian). The plaster seems securely bonded to the brick.
What is the best surface preparation to make sure that the next lot of tiles are fixed more securely?
What is the best surface preparation to make sure that the next lot of tiles are fixed more securely?