If you are building on level ground, we suggest placing your gazebo on gravel. If on uneven ground, you may need 4 x 4 treated runners. Treated for in-ground contact, they provide protection from rot, decay, and insects, as well as support the structure on uneven ground. Having 4 x 4 runners will also help if you ever need to move your gazebo. Shimming under the runners makes leveling easier. Placement of your runners vary by the size of the structure, and will be provided upon request.