As a rule of thumb, use a minimum of 6″ of base material for walkways, 6″-8″ for patios, and 10″-12″ for driveways. The sand setting bed should be 1″ thick. One ton of modified stone or sand will cover 100 sf at 2″ thick. Using a 10’x10′ (100 sf) patio as an example, you would need 1⁄2 ton of sand for the setting bed (1″ thick) and three tons of modified stone for the base (6″ thick). You’ll need some additional sand (about 5 percent) or about two bags of Polymeric Sand for the joints between the pavers.