"Buck Turgidson" wrote in message
...

Question 2: Would a vapor barrier make sense in the attic? Would it be
most effective under the insulation? Over the insulation? Or against
the roof?

I also have a similar house in Northern Virginia. My attic has a layer of tar
paper laying on the ceiling drywall which serves as a vapor barrier. You
might check to see if you have that.


I thought the whole point of tar paper was that it passed water vapor but not
water.

Bob