Dance Floors can only be set-up on level ground and may require a site check. If the dance floor is set up on grass, we must charge for plywood underlayment. Dance floors must be kept dry at all times. Water absorbed by the wood will bow and destroy a dance floor. In addition, dance floors cannot be set up on or near sand, gravel or decomposed granite. Gravel, sand, or pebbles will scratch the oak/vinyl of a dance floor & destroy the finish. DWC does not protect the client from preventable water damage, excessive wear from surrounding abrasive ground surfaces, or any substance attached to the floor by a client.