I just had a brick fireplace tiled with marble tiles.
Should I seal it with natural stone sealers? Is there a chance water would form behind the tiles and migrate into them from the back? The fireplace feels colder than room temperature during the winter -- the back side of the fireplace is the base of a chimney outside the house.
Three contractors came to bid on the job. None of them mention anything about sealing the tiles. Perhaps tiles on fireplace don't need to be sealed?