We recently moved into this place and the shower has this crack in the tiles.
I imagine this is quite bad in terms of humidity creeping into the wall?
Is there a way to fix this without having to redo the entire wall?
Thanks for thinking along!
this post was submitted on 05 Feb 2026
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That looks like a shallow crack. If the shower is constructed appropriately there is a moisture barrier behind it that does the real water proofing work.
If the shower is appropriately built then the moisture barrier is probably fine and will keep doing its job. I'd buy some white caulk and seal it up, or better yet an epoxy unsanded grout from a tile shop that matches the color (comes in a tube like caulking).
If the crack gets worse over time after sealing, then it might indicate some shifting or defective installation.
Could be something as small as insufficient mortar behind the tile as it was applied. If you tap the area and hear a hollow sound that could be an indication of insufficient mortar coverage. If you dont, then it could indicate some settling or shifting in the backer substrate, at which point id try to get in behind that wall and see what's up.
Im not an expert but I've rebuilt three showers DIY so just sharing what I've learned educating myself on how to do it right.
Thanks for sharing your experience!