In my shower there is a 1/2 gap between the tub and the three walls. In the past I have caulked the area. Currently there is several cracks in the caulking allowing water to get behind the wall and leak into the ceiling below. The leak just began so I don't believe there is any mold or damage other than the stain. I know the solution should be to remove the tile install cement board and membrane and re tile. The other solution I may do will be to re caulk and install bull nose tile to cover the 1/2 gap. Does anyone have any recommendations for this issue?