David
If you are in a cooling dominated climate, the vapor barrier goes
toward the outside, in a heating dominated climate, the vapor barrier
goes toward the inside. In a mixed climate there should be NO vapor
barrier. Check the new International Building code for details, Here
in Myrtle Beach, SC the code says NO vapor barrier. The code says
which counties in which states should not have a vapor barrier, This
helps protect yoy from mold.

Stretch