I had to drain the water from my fiber-glassed, in ground ~15K gallon gunnite pool.
The glass and tiles in question are approximately 14 years old. The tiles are under water, and set flush into a recess in the glass in strips one tile high.
Inspection of about 50' of ~3/4" tile strips showed enormous grout damage. I'm pretty sure the contractor used a standard non-sanded grout to place the tiles, so I am surprised it lasted this long.
While cleaning out the joints for re-grouting, I found about 30 tiles that are loose from the mesh underneath that originally held them together and down to the surfrace. There is not lots of depth available underneath for a material to anchor them with; I was thinking perhaps of using a very thin coat of standard JB Weld or JB Waterweld.
I know the standard can be made thin enough; it is said to be "steel filled" and for "marine use." I have no experience with the waterweld product.
How would 'yall recommend seating these loose tiles before I re-grout?
I was advised to use an epoxy type grout for the repair, but after finding a box at Home Depot for about $25, was shocked to find that one had to mix the entire batch. They gave no hint as to "pot life."
Since the original grout lasted this long, I have no qualms about using a standard, non-sanded grout.
WOULD THIS BE A MISTAKE?