A.D. writes from West Pawlet, Vermont: "We purchased the PINK OC fanfold 3/8" thick insulation and saw warnings about proper installation. We have a barn/shop with just studs and boards. We wondered if we can just install that in between the studs against the boards to make the building warmer in the winter and cooler in the summer or does something have to go against the boards before the insulation is attached? What if we want to put sheetrock over it eventually?"

Answer: The proper way to insulate your barn is similar to the process for a new pole barn. Use unfaced fiber glass insulation between the studs. Cover the entire assembly by stapling 4 or 6 mil polyethylene to the studs. The poly will act as a vapor retarder and help decrease air infiltration.