My house is a typical raised ranch in CT with a 46x22 foundation. When I bought the house the garage floor had a large settlement crack and was pitched so that rain water would hit the slab beyond the garage doors and run into the garage. The home inspector said it was really no problem since it probably happened 30 yrs ago and it could be easily removed and repoured since it's a floating slab. Being the DIY'er I am I made a cut about 20 feet in, across the 22 foot width of the house and jack hammered out the floor myself. When I was within a few inches of the wall on one side I decided to dig down to see how deep the footing was. That's when I discovered what a monolithic slab is. Now the slab is gone within 8-10 inches of the wall in most spots and within 4-5 inches in one part. I called one concrete guy so far and he wants to cut the original slab 5 inches from each wall to make it even then put 24"rebar every 16 inches only in the 2 wall sides of the old slab. There will be no pinning to the original slab accoss the width of the house. He'll then pour a 5" slab with 4000 psi concrete with no other bar or wire mesh. He says he'll skimcoat the existing 5" slab but it will probably break apart there eventually. I am concerned that I have permanently damaged the structure of the house and would like to get some opinions on this and if this is the proper fix. Talking to a few other concrete guys so far it seems like they all have a different opinion.