I have mold growing behind the tiled walls of my master bath.There is about a 8 inch space along the wall behind the tile and the sheet rock on the wall behind the closet in the next room.The mold is on the sheet rock. Is there a way to kill the mold with out tearing out all the wall in the closet. The shower head was leaking in the wall after I had my house re plumbed. I called the plumber several times, but he never called back. Live and learn about who you do business with.