Are these gaps between tile in shower bad?

November 30, 2019

It looks like the caulking or grout (not sure which one) has space for water to possibly get behind the tile. Please look at pictures.

We have lived here about two years and I just noticed this when cleaning my shower. The tile is like this in a few places.

I found some people saying to tear the whole shower down to the studs because there could be mold behind the tile, and some people say to seal it up with new caulk. What would you do? I don’t want a mold problem, and I have no way to tell what damage may have occurred behind the tile from the two years I have lived here and the previous owners.

Should I be worried about this small of a gap causing major mold damage?

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