Quote Originally Posted by Simmons99
I would go with what the pool builder is most experienced at installing.
This makes a lot of sense. Our builder had bad experience with shotgrete here in the middle of Oklahoma. He said that our shotcrete just didn't hold up as well to our shifting red clay. He thinks it would be fine in most other types of soil.

I can't say how true that is at all, but as Simmons99 says, use what the builder is experienced at installing.