My original pool contract guarantees the structural gunite shell to be leak proof during my ownership of the pool and that if repairs be needed to make it leakproof it shall be made without charge to me. We noticed that during heavy rains when the pool overflowed it would go down very quickly to the middle of the tile and then stop. Then some tile fell off and I saw a horizontal crack behind the tile. I notified the contractor who said it was only a morter problem and proposed injecting it with hydraulic cement. I took more tile off and the crack runs quite aways around. He says he does not need to remove the coping. I believe all the tile needs to be removed to assess the repair and that injecting cement will not be sufficient a structural repair. He also wants to charge me for new tile as mine has been discontinued. Before I go to the mats on this, does anyone have any thoughts. Also, how much would plaster resurfacing cost for a 30x15 gunite pool 3-5 feet deep without the other repairs?