Yes, I understand that the radiant barrier needs an air space. The interior of the garage provides that air space. In addition, there is an air gap between much (but not all) of barrier and steel door due to how I tucked excess bubble stuff back behind the barrier sheet along the left and right edges. Also, note that the barrier stuff I used has reflective coating on both sides.
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Originally Posted by Fastskiguy
My understanding is that you need an air gap between the steel door and the foil wrapped bubble wrap stuff to get the best performance....not sure if that is true or not though
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