Why driveway bases are deeper than patios
A driveway carries live loads from moving and parked vehicles. That means the compacted gravel base needs to be deeper and stronger than a patio or walkway base. The pavers alone are not the structural layer. If you need a full project estimate, start with the driveway paver calculator.
Recommended gravel base depths
Passenger cars and SUVs often use about 6 inches of compacted gravel. Pickup trucks and vans often benefit from 8 inches. Heavy trucks, RVs, and boat pads often need 10 inches or more, especially if the subgrade is weak or drainage is poor.
Do not forget paver thickness and bedding sand
Total excavation is more than the base layer. Add the paver thickness and the bedding sand layer to the gravel depth when you plan excavation. A common 60mm paver with 1 inch of bedding sand over a 6 inch base already puts total depth near 9.4 inches.
Freeze-thaw climates need more depth
In colder climates, adding roughly 2 inches of base can reduce frost-heave risk and improve drainage. That extra depth often matters more than surface pattern changes or decorative borders.
Compaction still matters more than raw depth
A poorly compacted 10 inch base can fail faster than a properly compacted 6 inch base. Good materials, lift-by-lift compaction, and drainage are what turn the base into a structural layer.