First let me make this short. I am a retired Carpenter and have been doing remodeling for over 30 yrs. The home I bought 5 years ago had the slab repaired about two years before i bought it but they went broke before they could come back and do some more on it. It is 3" low on the west side which is the side that gets most sun. The east side is down 7" front is not bad full sun all day. The area that I am starting to work in now is the worse side so I am going to start repairing the foundation. They used piers I was going to dig up around the piers and maybe just add to the ones that are there already or would you put new ones back under. I am planning on doing it myself. I was watering with soaker hoses around house during summer but stop because of water rationing. It seemed to help a little, anyhow what would be the best way to get this up to par. Also in the one room we are redoing on the east end I think also it might need to cut out concrete in the bedroom that is going to run the full length of house if that would help also. I am taking out two closets and making one large narrow bedroom and of course this is the worse side of the house.