Crusty_Nostrils t1_izt4kmc wrote
Redo or you'll regret it. Tiles fall off sometimes even with grout, there's no way gypsum is going to be adhesive enough to bond tiles to a wall. Plus grout is designed to be moisture resistant but gypsum compound definitely isn't.
Fortherealtalk t1_iztdn4j wrote
Yea, if the tiles DID happen to stay up, I’d be concerned about mold or mildew if water got back there
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