Ok I am tearing down my old storage area so I can kick out my garage 6 feet. Like I stated In my other post. And my Q. Is the concrete slap its on is 5 1/2 inches lower then my garage slab. Can I keep that slab there and just put concrete over it when I pour the new slab it has rebar in that part already and plan on using rebar on the rest of the slab.