I am in the process of putting in a concrete pad...to help ensure stability. I was told to stay away from less stable materials like gravel, wood directly on the ground, etc...in case it settles.
I was originally setting up to do a 4" slab...but was told tonight from a local plumber/contractor that he would go 6" minimum. Everything I have read indicates 4" with re-bar should be sufficient. The hot tub I am getting is a 6 person, 450 gallon unit. Now I am not sure...my soil is very compacted...lots of shale...almost no loam or sand...so I figured 4" of concrete should be enough...but now I am second-guessing myself....any comments?
Tks
Rich