A solid paver patio, walkway, or driveway requires the use of correct base materials and an installation strategy. Paver bases offer a sophisticated touch to any outdoor home improvement project. When the right materials are used, paver foundations are efficient, quick to build, and easy to install. A paver base consists of three levels: subgrade, subbase, and base. https://modutile.com/product/gravel-pavers-outdoor-basketball-court-base-24x24/