Scott writes from Howard, Ohio: "I have recently had an addition put on my garage. This addition will be a heated and air conditioned area. The contractor put on housewrap. When I insulate the exterior walls do I need a faced or unfaced insulation? Also the attic area is used for storage. Should I insulate the roof area to help with heating? I am going to insulate the ceiling under the attic area."

Answer: We recommend using a faced insulation with the paper on the side of the wall that will be warm in the winter.

The only reason for insulating the rafters is if you are going to finish the attic space or need warm storage. If neither is the case, insulating the ceiling joist (floor) should be sufficient.