James writes from Bolingbrook, Illinois: "I will be starting to finish my basement soon. I am looking at the building codes and must have a 1" air space between insulation and concrete walls. How can I use FOAMULAR insulation to insulate? Will I have to cut it and place between all studs? Or can I attach directly to back of stud prior to standing the wall? Is this going to cause a reverse vapor barrier. My town requires a vapor barrier on the drywall side of the insulation."

Answer: FOAMULAR® insulation is not a vapor retarder. There is information on the Owens Corning Web site showing proper basement installation using an extruded polystyrene (XPS) insulation product.