O writes from Sacramento, California: "I have a home built in 1960, with wood siding. I need a new garage door and would like to participate in the Residential Energy program that allows a tax credit for insulated garage doors on an "insulated garage space" attached to the primary residence. My garage is finished (the rafters are exposed) and is not currently insulated. I do not know how much or what type of insulation qualifies as an "insulated garage space". Can I only insulate the rafters? What's the best way to insulate?"

Answer: We don't have details on the tax credit you are asking about so I can't tell you if just insulating the garage ceiling would qualify. You can probably find information online at one of the government's tax websites, such as EnergyStar or IRS.

Faced rolled FIBERGLAS™ insulation is recommended in the garage ceiling, assuming the garage is not heated or air conditioned. Do not put plastic under it as it needs to breathe. Since the garage is not heated we do not recommend insulating the walls.