NO, this will not work. Any reflective product needs at minimum a ¾” airspace in order to work. Without this airspace, the product acts as a conducting material and transfers all the heat from the roofing material into the attic. We receive calls all the time on this issue and in many cases a potential customer had been told by a roofing contractor that this installation method would work, unfortunately either the contractor is miss-leading the consumer or he just does not understand how reflective products work. Please see this page for more information about how radiant barriers work.