When Is Garage Ceiling Insulation Necessary?

Ceiling insulation in a garage is usually a good idea, even if it's not an absolute necessity. If your garage is attached, you'll want to insulate it to prevent fumes from spreading into the rest of your house—something likely to happen each time you start your car. If you store fertilizer or other chemicals, fumes can also spread through an uninsulated ceiling and walls.

Ceiling insulation will keep your garage cooler in the summer, warmer in the winter—washers, and dryers used in a garage last longer and use less energy in an insulated garage.

When Ceiling Insulation Is Necessary

When there is living space above the garage.

When the rest of the garage is insulated.

When air ducts, water lines, or electrical wiring runs through the rafters and into the house.

When or if you plan to store chemicals, fertilizer, or paint in the garage.

If you park cars or any vehicles in the garage.

If you want to save money on your utility bills.

To help soundproof the garage when using the garage as a workshop as well.

When Ceiling Insulation Is Not Necessary

If your garage is not attached to the house.

If there are no water or plumbing lines or other heating or air-conditioning needs in the garage.