The base beneath a driveway helps distribute vehicle loads and provide uniform support for the concrete.
Depending on site conditions, preparation may include removing unsuitable material, adding compactable aggregate, grading the area, and compacting the base before concrete placement.
The type and amount of preparation depend on what is exposed after removal, including soft areas, inconsistent fill, moisture conditions, and changes in elevation across the driveway.
Base material must be placed and compacted so the slab has a stable, reasonably uniform working surface rather than isolated areas of weak support.
We determine base preparation from actual site conditions rather than assuming every driveway requires exactly the same treatment.
A properly prepared base cannot eliminate every possibility of cracking or movement, but it can reduce avoidable problems caused by inconsistent support.