A few months after finishing my ensuite reno I noticed that there was one tile near the bottom of the shower that was discoloured. On closer inspection I find that water has penetrated this tile.

I don't see anything obvious around the grouting or tile that would cause this, but obviously water is getting in behind the tile somehow. It is only this one tile.

What to do?

Was thinking of stop using the shower for a little while, place a heater in the shower, dry it totally out and then go over the grout with a grout sealer and see what happens.

Is this the way to do it? Would be nice not to have to replace the tile!

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