I am renovating our pool. We removed the old coping and decided to go with oklohoma flagstone. The old pool had the tile butted up to the coping. With the new coping we have a large "mortar joint" gap around the pool. The pool guy said thats normal because the oklahoma flagstone is not consistent in height. This varies around the pool. I am not happy with the look but the pool guys said there is nothing that can be done. it gets up to 1.5 inches in places.
My question is since there is now a large mortar line will that fail sooner? Is it going to crack and let water in? I already notice small hairline cracks like what you see in the picture. Also is there anything we can do at this point? Is this because we used flagstone and is this normal.
Again our last coping (old bullnose style from the 90's) had the tile right up to it.