Driveway Base Preparation: The Part You Never See Again — Draper, UT

Once a concrete driveway is finished, everything that decides its lifespan is buried underneath it.

The base is excavated subgrade, compacted, then covered with a compacted gravel layer that provides uniform support and drainage. If that work is skipped or rushed, no thickness of concrete on top will compensate.

What good base prep looks like: organic material and soft spots removed rather than covered, subgrade compacted in layers, gravel placed and compacted in lifts rather than dumped in one pass, and the whole thing graded so water has somewhere to go.

What you can ask, since you will not see it afterwards. Ask how deep they excavate. Ask what the gravel layer is and how it gets compacted. Ask what happens if they find soft ground once they open it up, and whether that changes the price.

That last question is the useful one. A contractor who has thought about it will have an answer about how they handle unexpected ground, because in this valley they hit it regularly.

You are not trying to become a concrete contractor. You are trying to work out whether the person quoting you has a method, or is quoting a number.