Insulate the walls of your garage. Proper installation of insulation in your garage requires that you carefully study the installation guide, and be sure you select the appropriate insulation thickness for your garage’s walls. Some typical mistakes people can make are: not securely fastening the batt insulation, cutting it too long or too short for the location, or not supporting it properly. Bear in mind that insulation needs to fit snugly; however, do not jam it in too tightly.

Repair or replace the weatherstripping. Weatherstripping will create an effective seal between your garage door and the garage door opening. If you feel any cold draft leaking into the garage between the door and the frame, then remove any of the existing weatherstripping if it’s brittle or cracked. Scrape off any remaining sealant using a pry bar and putty knife or flat scraper. Make the surface as clean and smooth as you can. After you totally remove the old weatherstripping, measure in order to apply the new weatherstripping. To align it, shut the garage door and make sure the rubber flap flattens slightly against it. You’ll have a good seal and the garage door will operate easily.

Insulate the garage door. A great variety of products is available to you for insulating your garage door, including a kit specifically designed to do so. The options for effective insulation include reflective barriers, foam board, and Fiberglass batt insulation.

Whatever option you choose, first you’ll need to cut the insulation to fill the garage door panels. Next, secure them with adhesive and make sure each stays fixed in place. If your garage door is not the kind with recessed panels, the whole job will be easier.

For most people, insulating the garage yourself is too daunting. If it all seems too much of a bother, then your best bet is to hire a professional to install a modern-designed insulated garage door for you. If you’re located in Roswell, Georgia, consider hiring a trustworthy professional from a reputable garage door company.

Install a unit heater inside the garage. Weatherstripping and insulation effectively protect your garage from extreme winter weather, but if you’d like to be extra toasty, add a unit heater. (On the other hand, if you experience only mild winters, then an electric unit heater is likely all you’ll need, since you’ll require heat only once in awhile.) This is a good way to heat your garage with minimal construction costs and space requirements. Gas-fired units are usually cheaper to operate overall, but they’re harder to install since they require a gas supply and exhaust venting. There’s also the electric model, which is easier to install but more expensive to operate. An especially efficient electric option is the mini-split heat pump, which provides efficient heating and cooling for your garage with only a three-inch hole through an exterior wall.

Hot Weather Protection

In the summer, the main goal is to enhance the airflow in your garage. All of these measures are worth considering:

Insulate the garage ceiling. If you use paper-backed batt insulation, ceiling wallboard isn’t required. Install the insulation using staples, paper side down, or keep the insulation in place with netting. You can also use staples to fasten the netting. Experts advise that you do both.

Wall insulation efficiently keeps out summer heat. Wallboard or other paneling should be used to encapsulate the material. You’ll prevent toddlers, teenagers, and pets from tearing things out.

Leave the garage door slightly open, about 12 inches from the floor, and also add a fan.

Plant a tree nearby. A deciduous or hardwood tree is an inexpensive and aesthetic way to cool your garage in summer. (It even keeps the garage warm in winter.) Plant the tree between the garage and the position of the sun during the hottest part of the day. The tree’s leaves will provide shade. (In winter, the bare branches will let sunlight through, giving warmth.)

Attach an adjustable rollaway awning onto the sunny side of the garage. In this way, you’ll create shade to cool things off during the summer.

Insulate the garage overhead door. For a metal garage door, add a layer of rigid insulation two inches thick, attached to the inside of each panel using contact cement. Or, an insulated sectional overhead door is a good alternative.

Install a stationary vent on the roof. This is an inexpensive way to make an exit point for hot air trapped in the garage attic. Or, if you can spend more, install a mechanical exhaust system, in which fans will draw cooler air from the garage into the attic. This will cool the attic and also the space below.