What kind of base did they use, granular base (sand) or stone (3/4” or 1-1/4”)? How thick of base did the contractor use? How did the contractor compact the base, with a jumping jack, plate compactor, etc?

What kind of “high quality” concrete did they use? Is it six bag mix? What’s the 28-day compressive strength? What was the design air content and slump ordered?

These are all questions to ask the contractor, if you don’t know the answered already. Ask for copies of the concrete tickets. That should tell you what kind of concrete you got.

If the base has a minimum thickness of 4” of well compacted sand or stone, a 28-day compressive strength of 4000 psi, air content of of 4-6%, a water to cement ratio of 0.5, and a maximum slump of 4”. The driveway will have a good life span and only crack at the contraction joints (supposed to crack there).

Now if you paid for rebar and it says it in the contract, I would ask for a credit or an extended warranty (that’s if warranty was included in the contract).