Dan writes from Rochester, New York: "My spare bedroom is over my 1 car garage. The ceiling of the garage is drywall and there is no insulation between the ceiling and floor. What are the directions for blowing in the insulation > What type of insulation should I buy, and will the insulation fibers get into the bedroom through the floor boards?"

Answer: Blowing insulation into the enclosed cavities of walls and ceilings is generally not a good do-it-yourself project because the walls or ceiling could be damaged by an inexperienced operator. We recommend hiring a contractor for this project.