Dwight writes from Fuquay Varnia, Virginia: "What is the best way to insulate a garage that has been finished, (sheetrocked) already? I want to do this myself, but I think the blow-in would cause bulging if it gets damp and settles. How would you put the vapor barrier on a wall that has already been sheetrocked? Or, do I just get rid of all the sheetrock and insulate then re-sheetrock the walls? The floors of the bonus room just above the garage are very cold in the winter and warm in the summer, should I remove the ceiling sheetrock and add more insulation? I will be removing the large double garage doors and studding it out to accommodate an exterior door and windows to match the rest of the house."

Answer: Well, the quick way would be to drill holes and blow in the insulation. You can then paint on a vapor retarder. For the best result, tear off the drywall and start from scratch. Install insulation with a vapor retarder facing the inside. In the ceiling, install an R-30 with the paper facing up toward the living area in the home. Before putting up the wall board, caulk all the seams between studs and plates to prevent air infiltration.