Need help diagnosing if there is a leak in my shower threshold

Question

I had my shower remodeled about 3 years ago and recently have started to notice some issues in the grout around the threshold. There appears to be some mineral deposits at the base of the threshold on the shower side as well as the other.
There are some other discolorations and cracks in the grout which are only around the threshold. If this was normal wear I would expect to see it everywhere in the shower, not just around the threshold.
Is this a sign of a bigger issue like water getting into the threshold or is this normal?

ojait · Answer

The best way to confirm if your shower basin has leaks around the tile is to plug the drain. Remove the grate and install a stopper of the appropriate diameter. It must be 100% plugged. Next fill the basin with water. It is easier to use 5 gallon buckets filled from another water source. Fill the basin to just below the curb. Mark the water height with tape and/or marker.
Wait awhile and check if the water level has dropped. If it hasn't let it stay over night and recheck. If no noticeable change in water level there are no leaks in the grout or joints.
I would suggest re-grouting those joints that have missing grout and any others that have loose grout.

Need help diagnosing if there is a leak in my shower threshold

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