I have a 25 year old ceramic tiled roman tub that has been leaking for a while. It was built with a plywood frame that was what looks like hot tar membrane. The tub settled and split grout line over spigot.I have a guy that says he can fix without tearing out tile.He removed the wood frame from behind the wall...dried out framing and coated with roofing mastic and he says when he stops leaks he will cement over the area......he hasn't stopped it yet and I am beginningto think this plan is wishful thinking on my part. Hate to rip this whole thing out....do I have any options? Ps I took out the grout under the spigot and re grouted and sealed and seems to have stopped the leaking for now.