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— A gravel shed foundation or pad is a low-cost and easy-to-use base. Find out costs, leveling, and site preparation tips for installing a shed on gravel. ... Another option is "crusher run," which is a mix of 3/4″ stone and smaller stones. ... and a chance to win up to $500. Your email address Subscribe. Trustpilot. 4.8/5 - 20,541 Ratings ...