Rubber elevation blocks create a shield against ground moisture. When play sets are exposed to constant ground moisture they begin to rot causing the play set to become unstable.
Having the play set raised also allows for ease of lawn care machines to go under the boards rather than along them causing damage to the wood.
Although Woodplay offers a lifetime warranty on all wood components, they do no cover shipping for the parts or the labor to replace them. The US average cost is about $750 dollars to replace and reassembled damaged parts.