Re: Another Vapor Barrier ?
The vapor barrier is placed on the warm (room) side of the insulation.
If you are using fiberglass bats place them into the stud bays so they are touching the foundation. Then use a continuous vapor barrier that will cover the studs also the top and bottom making sure to use a house wrap tape to seal all seams of the barrier. Then attach your drywall over top.
While you are insulating make sure to do the rim joist areas as well.
A recommendation is not use fiberglass at all .... instead use sheets of rigid foam. Simply use some PL premium adhesive to glue the sheets to the foundation then put up the wall framing then the drywall. This will give a complete thermo break from the foundation wall and will provide better insulating performance than the interrupted method of insulation with fiberglass bats.
There is no need to fuss with vapor barrier.
At least that's my experience from the great white north.:)
Check this link :[URL]http://www.eere.energy.gov/consumer/your_home/insulation_airsealing/index.cfm/mytopic=11620[/URL]