2. Staple or nail ½-inch hardware wire mesh to one side of the open frame. If desired, add trim on top of the mesh to hide it. (If you’re a skilled woodworker, you can also cut a channel into the wood and slide the mesh into the channel, hiding the mesh's cut edges.)
3. Staple or nail a 1-foot square of plywood onto the open back of the frame. Stockwell uses exterior plywood or 1x12-inch redwood.