No John, the preformed cove snaps into the bottom rail. It is perfect for indoor display pools or pools set up on concrete. In a normal dirt situation I feel a little dirt over the rails covered by sand is more than adequate. If the cove is used it should be put in place before the sand is spread. The sand will almost cover the cove but that's ok. You are getting the wash out protection and a small birm.

Hope that helps some, Dennis