Proper Base Preparation for a Paver or Stone Patio

For a durable patio base, do not mix sand and gravel together. Instead, compact a 4- to 6-inch layer of crushed stone (gravel) first, then add a 1-inch layer of coarse sand, screeded level, for setting pavers or stone. This prevents settling and ensures drainage. Excavate to a depth that accommodates the base plus paver thickness. Use a plate compactor for the gravel, and ensure the base slopes away from the house at 1/8 to 1/4 inch per foot. For detailed guides, see Belgard's installation page or WikiHow's paver installation article. Proper base preparation is critical for longevity.