Repairing Waterline Tile Grout

[markphin]

I too have noticed some loose tiles, they have not popped off but are a bit loose, because the grout at the coping line came off, and I gusee some water got behind the tiles. My question is, can I just re-grout for now in hopes that they won't pop off, or should i cut the loose ones out and re attach per the above reccomendations? Note these tiles are above the water line as part of a raised spa.

[judas]

If the tiles are loose, you need to remove them and reattach. Just repairing the grout won't help - even though the tiles aren't submerged, water (splashing, rain, etc) will still get behind them and there will be a cascading effect of popping tiles. Better to fix it sooner rather than later...

I just went through this a few weeks ago, I had about six tiles that loosened up near the skimmer. I ended up using a 50/50 mix of limestone and portland cement, mixed with water. I used that mixture as well to grout with - I didn't really car how it looked since I plan on retiling next season.

So far so good, the tiles are firmly attached and have been partially submerged in water since I finished the job. No cracking grout, etc.