Bought our house in 02 and there was some patching of the plaster done on the steps. Rest of the pool looked solid albeit a bit of discoloration in the plaster on the bottom. Fast forward to today and it seems that i have quite a bit of de-lamination happening just below the water line tile. It started off small and has grown in the deep end to about 6" below the water is an area about 4' long. In other areas it is sporadic and only about 1/2" below the tile and in spots of sever inches long. Behind the plaster is what appears to be more plaster. I know for a fact it is not the gun-nite. Pool was built in 91. What i am wondering is if the plaster was re coated or this is the original finish. What is the life expectancy of plaster? Seeing in 02 the finish looked used and was patched on the steps i suspect it is the original?
Ill put a few pictures up tonight when i get home.