re: Pouring a new home slab over an old one

You probably would have to get the existing slab tested to make sure you can go over it. If you can, you'd have to haul dirt in regardless to pour a new slab. If your wallet can swing it, I'd probably get it removed and start fresh on a new pad. I know in the back of my head I'd always wonder if it was ok. But that's just my weird thinking.