How likely is it for the roots of trees around the pool area to actually penetrate the walls of a Gunite pool and what is the fix for it and how thick is the concrete gunite around the pool?

yoU MAY FIND YOUR ANSWER FROM A MASTER GARDENER. dIFFERANT TREES HAVE VERY DIFFERANT ROOT SYSTEMS. lISA add'l answer:

Depends on how close the tree(s) are to the pool shell and the type of trees involved. I have seen a very invasive root system on 10 to 15 yr. old pools with no visual affects on the inside surface of the pool plaster. However, another concern would be what are the roots doing to the Plumbing to and from the pool? A root can mangle a section of PVC pipe considerably before it cracks. On the other hand a 90 degree elbow( the weakest point would be the inside bend of the elbow - crotch) will split under pressure from the root system. This "leak" could not show up for months and if you have an automatic fill system you may not know about a leak until the pipe or fittings separate. About the fix - consult with an arborist.

K

Building practices change from area to area and generation to generation, but you could probably expect to find the gunite is 8" thick with potentially a 12" thick perimeter bond beam around the top of the pool wall.