Radiant Barrier Over Closed Cell Foam

Ask The Expert – Q & ACategory: Radiant BarrierRadiant Barrier Over Closed Cell Foam
RIMA Expert Staff asked 8 months ago

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.

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Best Answer
RIMA Expert Staff answered 8 months ago

You may wrap the radiant barrier as you described, making sure the reflective side, if there is only one, is facing outward.