Simple question. Pool was originally filled June 1st, 2011, so it is about 2 years old. Opened the pool this year and a number of the upper waterline tiles were loose, being held only by the caulk (I've pulled them off, since they kept get caught on the solar cover). Same thing happened first opening last year. Last year the tile guy from the PB was out pretty quickly to replace the tiles. This year, not so quick (there is a 3 year warranty on the tile, so I'm hesitant to do anything myself, yet!).
Most of the tiles came off the thinset pretty cleanly (back of most tiles are clean). A couple came off with some gunite attached, maybe 1/2" to 3/4" thickness (on the far right of the right set of missing tiles in the picture, if I'm able to attach it successfully). If I were to try to tackle this myself, I know I would have to chip any remaining thinset off the gunite, before I attempted to reset the tiles.
A couple of questions:
1) I've been trying to keep the water level below the exposed gunite. Is that necessary? Is it safe/OK to let the gunite get wet? I would think it should be fairly dry when trying to re-install the tiles.
2) If I were to try to tackle this myself, where the gunite has come loose, can I fill that with thinset or would I need to mix and apply some type of concrete base first? My guess is that trying to apply a layer of concrete that small would cause more problems than it would prevent.
Thanks for any comments/suggestions.