Bill writes from Edmonton: "Good Morning Pink Panther, I live in Edmonton, Alberta, Canada. I have just purchased Owens Corning Celfortec T200 from a local building supply. I told them that I needed it for a heated crawl space to insulate the outside cement walls. It would be most difficult to build a stud wall; the wall is 43 inches high. They told me I could use a construction adhesive to secure the insulation to the cement wall. Can you please tell me what to use? Thanking you in advance."

Any petroleum-free adhesive will work. Petroleum-based adhesives will deteriorate the foam board.