5 Steps to Insulating Your Garage Door

Insulating your garage door has numerous benefits. Some of the benefits include reducing your energy bill. If your garage is attached to your home, garage insulation can prevent areas of your home from heating up due to a hot vehicle sitting in the garage. Insulation also keeps the inside of your garage cool if temperatures are warmer outside and will also reduce internal and external noise. Although a professional can be hired for the job, garage door insulation can be done by yourself by following the five steps below.

Measure Your Garage Doors

Before buying insulation for your garage, measure the panels on the back of the door. To determine the dimensions of each panel use a tape measure so that you have have an idea of how much insulation to purchase.

Purchase Insulation

Your first choice of insulation is reflective foil insulation. This type of insulation includes polyethylene between foil and is sold in rolls. Another type of insulation is polystyrene foam which insulate your garage better, however, this type of insulation can be a challenge to work with because it is not as pliant as foil. Be sure to avoid spray and fiberglass batt insulation. Neither methods of insulation work well with garage doors.

Starting the Work

Before installation make sure to wear eye protection and work gloves for protection. To begin, use a metal straightedge and utility knife, cut the insulation that you have measured. It is best to cut more than you need so that you are able to trim off excess later.


Next, add the panel of insulation against the panel of the door. If you are unable to tuck the insulation into the frame of the garage, use foil to tape to tape the insulation to the door. Double sided tape can serve as an alternative. Another option to securing the insulation to the door is glue. Make sure to press and smooth the installation so that it sticks to the door.


When installation is complete, try leaning wood boards or anything against the door so that the insulation becomes more secure. Allow 12 to 24 hours before removing the wood boards and using your garage door so that your insulation job is not ruined. When installing the insulation, do not cover the hinges of the garage. This will hinder the door from opening and closing.


If you’re not up for the challenge of buying, measuring and customizing your own door insulation, consider purchasing an insulation kit. An insulation kit can be found at your local hardware store, and can make the process  less painful since the panels are already precut. Prior to purchasing the kit, make sure that the panels are not smaller than the door panels. The insulation process will be the same as described.

Important Notes

Remember that because you are adding insulation to the door, the additional weight could possibly require you to adjust the tension on the spring of the garage door. Or, you may have to replace the current spring with a larger one to manage the additional weight. If you do not take caution, the insulation may cause stress lessening the lifespan of your door. Your door could also unexpectedly drop when the door is released from the opener. After insulation is complete, you may need to rebalance your door due to the added weight of the insulation.

Installing your own garage insulation can be rewarding whether you are purchasing a kit or starting from scratch. If you’re unsure or uncomfortable about the process, consider hiring a professional.

Call +1 844-310-9395

Fill out my online form.