Woo! Got someone out today who will be able to just do repairs in the bad area(s). I'll have to go around the pool tapping on the coping to see how many linear feet need to be pulled up. Fingers crossed that it's not hollow all the way around! But even it if is, the cost would be something like $3-4k which is a lot nicer than $10-12k.
always helps to get multiple quotes and looks from people with some experience..i currently own a circa '83 30000gal sylvan (now saltwater) that has held up pretty good over the years (owned it 20 something years now)...made some mistakes, the first plastering lasted 25 years...i had sylvan do the replastering and it was a horrible job for $7000+
i have a semisolid looploc and one needs to be very careful to keep the water in the winter (especially when it drops below freezing) below the tiles
2 years ago my weir started dropping titles on the curve..i have the conglomerate coping they don't make anymore..my neighbors bought a sylvan right after this one was built and they got the smooth concrete coping that started cracking and they had to replace the whole thing to the tune of $10K and they got this kinda ugly red brick now
So i tried to tackle the tiles and like everyone said it's temporary fix until we have to redo it..i might just make it so that it's the next guy's problem
like yours the concrete behind was porous and hollow and had to be chiseled back to where it was hard again..tough when you are hanging over the 8 foot end!
then we used a hydrostatic concrete with hardener added and then applied and leveled so that we had room to lay the quickset and tile back on, you have to wait 24-48 for the concrete to harden
we then used quickset and tried to place the tiles back with a gap between each and again wait 24-48 for curing before adding the tile grout (with hardener added)
ezpatch 3 and 4 did the trick, the titles are real solid but i still get cracks at the very top line where it meets the coping so i regrout every season and it lasts until the next
now the other side of the weir is going, so we'll be doing that too..i was lucky in that it was only a foot square, the rest of the 700+ feet is pretty good
this season's crisis is the fact that the idiots building this pool used a short section of flexpipe under 4 inches of concrete to save some time connecting the skimmer to the pvc and it's seemingly crimped
with the corona virus causing a demand on backyard pools, the company i use hasn't replied back when they found out you can dig it from underneath, the concrete needs to be cut from above
and sylvan DIDN'T even answer the email i sent! yet they still bug me with coupons in the mail to use them for my next renovation project
so might just be i will be trying that repair, too
best of luck, hope to hear how it works out for you, you know you are not alone!!!