how do you protect yourself from cut floor joints?

[Steven Mitchell]

We recently bought a house, after getting two foundation bids, a stinker with cut floor joints.  This added another 10k to the rehab and killed the deal for us.  

How do you guys protect yourselves from this?  

We talked to an inspector.  Getting an inspection wouldnt have saved us as they say "we can only inspect what we can see".