Placement:

• It should be towards the "warm in winter" living area except in extremely humid areas. (Note: Kraft facing should never be left exposed.)

Integrity:

• Taping vapor retarder facings is not standard practice. Small tears and gaps are not expected to cause moisture issues but can be repaired if desired.

Materials:

• When required, appropriate vapor retarder materials may include kraft facing, continuous polyethylene sheeting, vapor retarder paints and "smart" vapor retarders. (Note: Polyethylene should only be used in very cold climates.)