In-ground pool tile repair

[pgzone]

Hello,
I'm pretty new to this forum but glad I found it. However, I was unable to find answer to my Question about repairing pool tiles :
* I've an in-ground pool and lot of decorative tiles of the pool have come off
* Some tiles have come off bringing along with it the concrete behind it
* I've invited folks to come and repair but they keep giving me advice to redo the whole of the top section vis-a-vis : Remove existing coping, remove all remaining tiles. I do know why this advice, but I'm fine with only repairing the tiles.
* The cost of doing the above is quite high which will include the "Deck-O-Seal" as well.

I know that I can repair/re-stick/replace the pool tiles my self even if it is going to take some time. I've following questions and would appreciate if the answers are provided
1. Fundamentally, are the pool tiles stuck over the plaster? It does look like it, as in some places the tiles have come off by themselves and in some places, they've come off along with the concrete.
2. To repair the worst affected area, I think I'll have to do following steps :
a. Patch-up the concrete and level it
b. Let the concrete dry for a day or 2
c. Apply plaster over the concrete
d. Let the plaster dry for a day or 2
e. Use swimming pool repair thinset mortar to stick the tiles
f. Let the thinset dry for a day or 2
g. Use waterproof tile grout to fill in the gap between the tiles
3. If Q 2 makes sense, then what type and brand of concrete should I use?
a. Is Quickrete hydraulic pre=mixed cement OK for the job? Any other special brand.
b. Is it necessary to put plaster over concrete? If yes, any special brand
c. How to determine the spacing between the tiles? Are there special spacers available for the same?
d. What type and brand of grout is used for this purpose?
3. If Question 2 doesn't make sense for the order of repair, can anyone suggest the steps needed?
4. If anyone is in NJ in MIddlesex County and would like to suggest pool repair biz who will do this work for me, please do provide a contact.

Thank you in anticipation of receiving a response.

[Teapot]

Just use a modern polymer adhesive, something like Sika flex EBT

[Teapot]

Just use a modern polymer adhesive, something like Sika flex EBT.

[pgzone]

Just use a modern polymer adhesive, something like Sika flex EBT

Hello,
Thank you for your response. However, I need to know for which particular Q was that response for? If I have to guess the steps, I would first need to level the surface with Hydraulic concrete and then use "SIKA FLEX EBT" all along. Is that correct? Also, is it worth using this or should there be a better solution if half of my tiles are coming off from my pool size which is 35x18 Roman End.

Thanks

[Jack753]

Yes I agree with Teapot