Chuck S.

Has anyone tried mud jacking? I have an older place (30 years) and the concrete apron around the back porch has settled. Probably have 3 1/2 to 4 inches. Spa is a 2003 Hot Springs Highlife. I know it can be shimmed, just don't know the limits. May be cheaper to pay dealer to shim and then I build an apron for it out of treated lumber. I have the room but hate to spend money pouring a new slab and like where the tub is now. I've read about mud jacking but don't knowhow reliable it is.