[wreckersteve]

The paper is a vapor barrier. It should be put towards the heated side. This keep the moisture from evaporating and geting in the insulation, causing possiable mold. By putting the vapor barrier in the cold side, you now trap the moisture good. The best woud be to use the type with out the tar paper and use a breathable product to hold it in place. Sort of like house wrap. Lets moisture espcape but not in.