This ring design will not prevent subsoils from becoming saturated, therefore a well drained site is imperative. The base further stabilizes and weatherproofs the area. A layer of uniform dense graded aggregate is recommended. Approximately 180 yards will be required for an average ring and after damping and compacting should provide a 4 to 6 base. The two most common cushion materials are sand or woodwaste materials such as sawdust, shavings or bark mulch.
Sand is the most durable and able to withstand frequent use.
Medium coarse, washed sand is recommended. Unwashed sand or dead sand becomes very dusty when dry. Woodwaste products are less expensive than sand and less dusty than unwashed sand, however woodwaste gradually decomposes and after several years can retain enough water to form soggy patches in the ring. Sawdust rings can also be quite slippery when dry. Woodwaste products must also be used so as not to cause pollution.