I have a bathroom upstairs with a bathtub/shower, and a bathroom downstairs directly below. I keep getting a significant leak from the upstairs bathroom down through the ceiling into the bathroom below. I finally determined for certain that the leak happens when the shower water is spraying onto the wall, it goes through the tile grout.
I know there's mold and water damage behind the walls and I plan on redoing the entire bathroom next year, but as a temporary solution for the leak, I'm considering gluing clear marine vinyl sheets (I'm talking about this kind of thing) directly onto the tiles, using a clear construction adhesive (like Gorilla Glue that comes in a caulk tube).
I'd glue one sheet on each wall and use caulk to seal the sides. To me this sounds foolproof at least as a temporary way to prevent water from getting through the walls. Are there any issues with this I'm not considering?