The term "Double-Poured" means that the owners had problems with the foundation previously (maybe settling problems)and may have re-layed concrete over it, to level it out. When concrete is layed, you have to place steel bars (frame) under the concrete to diminish cracking, from settling. Also, when a large area is covered, you need to put metal strips every 50ft or so, to separate concrete sections, to give it room for expansion. I would suggest not purchasing the home, if this is the case.

I take it then, that it would be too costly (if possible at all) to repair/correct? I forgot to mention, and don't know if it makes a difference, but this isn't a slab foundation. It's a perimeter "step" foundation into the side of a hill (slight incline).

Thanks!
Craig