How deep should my gravel base be for a patio?

For a patio or walkway, 4 inches of compacted gravel base is standard. Driveways need 8-12 inches to support vehicle weight. Always compact the base with a plate compactor before adding bedding sand.

What is polymeric sand and why should I use it?

Polymeric sand is a fine sand mixed with polymers that hardens when wet. It locks pavers together, prevents weed growth in joints, and resists ant intrusion and washout better than regular sand.

How tall can I build a retaining wall without a permit?

Most jurisdictions allow retaining walls up to 4 feet (48 inches) without a permit or engineering. Walls taller than 4 feet typically require an engineer-designed plan and a building permit. Check your local building codes.

Patio & Walkway Material Calculator

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