Skip to main content

garageGetty Images

The temperature in your garage can actually climb up to a piping-hot 110 degrees in the summer! Insulate and ventilate this space to maximize comfort and safety this summer.

Extreme heat and humidity in the garage makes for an uncomfortable space to work on weekend projects. Not to mention it's dangerous to store some combustible home improvement supplies in a garage that feels like an oven. Your parked car only adds to the problem: it radiates heat after being driven for just 15 minutes. (See also: Remove Oil Stains from a Garage Floor.)

Insulating your garage goes a long way toward saving money on energy costs, since the garage is the largest uninsulated space in your home. If you've got chemicals -- like automotive fluids and turpentine -- in this enclosed space, proper ventilation is a must. Here are are some ways you can insulate your garage to keep it cool in the summer heat.

garage fanHunter Fan Jetstream Garage Fan. Photo: Amazon

1. Add a garage ventilation fan.
A freestanding exhaust fan is one option. You'll need to direct the air flow out a door or window. A shutter fan is a good option if you have condensation problems inside your garage. A shutter fan runs constantly and pulls the condensation out of the garage.

Some high-end exhaust fans are solutions that need to be installed on a wall or in a ceiling. The ceiling is a good option for garages with great ceiling height, while wall units are best for low-ceiling garages. You may decide to hire a contractor to install an exhaust fan, depending on your level of DIY confidence (you'll need to turn off circuit breakers, remove insulation in the wall or ceiling area where fan's being installed, and install a house frame or wooden braces to handle the weight of the fan.) And you may need two wall ventilation fans.

The best location for ventilation fans is opposite the garage door, mounted high on the wall. Consider putting the fans on a timer so they run for several hours at a time and then turn off. You need a fan that's a powerhouse and can move thousands of cubic feet of air per minute.

garage doorDrive Images, Alamy

2. Weatherstrip your garage door.
To seal the gap between the garage door and the floor (where heat from the outside comes inside), add a layer of weatherstripping tape. You can weatherstrip around garage windows, too.

3. Insulate your garage door.
If you use your garage as a project workspace or as a storage space for tools that can combust under high temperatures (think spray paint), an insulated garage door will help keep your garage cool in the summer and warm in the winter. (Not only does insulation help regulate the temperature inside your garage, but it provides noise insulation as well.) You have a few different options for insulated garage doors. If you opt for wood doors, wood is a natural insulator. For metal doors, there are injected foam insulations. Another option is polystyrene panels.

garage door insulation kitOwens Corning garage door insulation kit. Photo: Ace Hardware

(You can buy a DIY garage door insulation kit; then you'd just need a straight edge, tape measure, and utility knife to install.)

Once you have a cooler, more comfortable, thermal-insulated space, you can safely store any range of tools or a supplies. Any room located above the garage will also feel cooler in the summer. Plus, you'll enjoy the resulting savings in your utility bill.


Follow Us

  • No features currently available.

  • More Hot Topics The Daily Fix  •  DIY Warrior  •  Home Ec  •  Handmade
    DIY Disaster Doctor  •  In the Workshop  •  Product Picks

    Home Improvement Videos