Thanks for the reply, I'm only having these guys demo out their own bad work, was trying to have him pay me what it would cost him to remove and replace, but he ultimately said he wanted to do it. So we basically came to an agreement that as long as he removed the decking (no replacement) and removed and replaced the bad sections of coping that I would be ok with that. But now I'm just thinking of removing the remaining coping and replacing it with pavers or some kind of stone. Our decking is going to be concrete, the landscaper that I have scheduled is supposed to be out in about 2 weeks, weather depending and told me a few weeks ago how he prepares the base prior to putting down the concrete. Basically he removes so many inches of dirt and then backfills/compacts with road base material. Sorry for the long reply, I know I'm going to loose money but and very hopeful that everything turns out how I imagine it in my head.you would only have to draw the pool water lower IF the tile line would have too big of a gap with a bullnose paver or similar, and then add a tile slice to fill the gap or grout/caulk it if its acceptable. your other issue is the base for pavers/stones is different than concrete. they would have to remove at least 5" of material and put a 4" minimum packed base and then a 1" max screed bed of concrete sand to lay the pavers. they could also pour another concrete slab lower and mortar the pavers to that slab. either way its more than just replacing the concrete with something else, the prep is totally different. regardless I hope you come out OK in the end, it sucks that you even had to deal with this. If you do concrete again make sure they protect their work from the elements and the sun this time