Repairing a cracked foundation or replacing it
Most cracked foundations need repair, not replacement, and I'd rather fix sound concrete than tear it out, because taking out a foundation means holding the house up while new concrete goes in. Replacing a section makes sense when the concrete itself is broken up or crumbling, or the damage runs too far to patch well. If a crack is old, dry and not moving, I'll tell you it can wait and you can keep an eye on it.

