Hi forumers, my ID propose that I overlay bathroom wall tiles rather than replace. Which one is better to do and what shd overlay cost

depends on the age of your building and also depends on the previous worker on how they do up the tiles. knock on ur wall tiles. do they sound hollow? if yes, please hack the walls. we don't want u shower halfway and the tiles all come crashing down.

cost wise, over lay will do away the hacking cost. other than that, it should be almost the same cost.