Waterline tiles need repair

[Smokymountainpool]

Hi,
I have 13 waterline tiles that popped off during the winter this year. I assume it is from water leaking between the coping and the joint with the cement deck which is tile covered. I am repairing this joint with new caulk this spring. The pool is gunite. I read an old thread that mentioned people had had some success with 3M 5200 marine adhesive for replacing the ceramic tiles to the wall. Any advice?
Thanks!

 

[duraleigh]

Thinset works as do a variety of other products. The critical thing is to understand why they popped (freeze/thaw) and do your best to prevent moisture from getting behind the tiles. Clean up the substrate really well before you start and you will find you can do a good job with about any adhesive.

 

[cowboycasey]

I have some knowledge of 3m 4200 and 5200 on boats.. The 5200 is PERMENANT, basically turns into a piece of concrete, is waterproof, and pretty awesome stuff on a boat.. I have never seen it done on a pool but it should work the same....

 

[Smokymountainpool]

Thanks ya'll! I believe the water leaked through via a crack between the coping/beam and the tile on the pool deck. I'm also going to check around the skimmer for leaks as the tiles are in that general area. I cut a 1/4" wide joint between the coping and the tile and am going to put in a waterproof outdoor expansion joint caulk over the top of a bead of caulk saver strip. That joint was originally just grouted and is cracked basically the entire 120 linear feet of pool circumference. I think that's been the major problem (besides me not having been able to hire a knowledgeable tile contractor. Live and learn and glad to have found TFP!