I have some extra strips of Enerflex radiant barrier that I would like to wrap around my AC line running from my compressor up to the condenser in the attic which already has a foam type (Armaflex) insulation over it. Also, I have some spots with the same situation with my water heater. I know radiant barrier works good over fiberglass but will it work over closed cell foam? I will have to wrap it tightly and there will be some overlapping of the radiant barrier.