Quote Originally Posted by matt4x4
Welcome clifftex.
I believe you're thinking of placing the cove under the foam, you would actually install the foam first - I would think one layer is plenty as long as your sub grade is smooth, you would tape all the joints of the rigid and then install the cove ON TOP of the foam so you have a 45 degree angle (transition) to the wall.
Gotcha,

My sub grade is decomposed granite which is fairly smooth with small pebbles tamped flush. Do you think that the "Original" Gladon cove which clips into to bottom track will be OK to use on top of the foam? The pool store was telling me that the bottom of the cove needed to be flush with the bottom of the rail.

Thanks for your help,
Cliff