Why do you need garage insulation? What type of insulation should you choose? Which parts of your garage need insulation? Read on as we answer all your FAQs.

If you’re wondering why you need garage insulation, you’ve clearly never had it.

In that case, you’re in the right place to learn more about the many benefits. In this article, we’ll cover some frequently asked questions about garage insulation, including insulated garage doors.

Keep reading to find out more about how to insulate a garage and why you should.

Why Do You Need Garage Insulation?

What’s the point of insulating your entire home if you let all the air seep in or out through your garage?

No matter how big or small the area is or how much you use it, it’s important to insulate your garage. Not only does it help prevent air from seeping in or out, but it also regulates the temperature of your home and prevents certain health threats like toxic mold. Oh, and don’t forget — you get to save money on your energy bill.

After insulating a garage, it might even become your favorite place in the house. It’s not uncommon for people to fix up their garage and make it into a cozy family or rec space.

What’s the Most Important Part of Garage Insulation?

Before we get into the types of insulation, we need to first cover the most important part of garage insulation. And that’s the garage door.

No matter how good your current insulation in the garage is, if you don’t have a proper door, you won’t get optimal results.

Installing an insulated garage door is one upgrade that allows you to use your garage year-round.

Whare are the benefits of an insulated garage door?

For one, a garage door that’s not insulated allows more sounds to come through. That can get quite annoying if you’re using a garage to hang out. If you have a workshop in the garage, an insulated garage door will help keep your noise from disturbing the neighbors, so it works both ways.

An insulated sealing door allows you to turn your garage into a man cave, a workout room, a workshop, or even a studio or office area. It can also help protect your vehicles and any stored belongings.

What Other Types of Insulation Should You Choose?

When it comes to garage insulation, there are plenty of options to choose from.

Let’s take a look at the most common insulation materials. Keep in mind there are a variety of other insulation methods/materials that have not been listed here, so it’s best to contact a company to discover what will work best for you.


A fiberglass solution with cotton is batt. It’s installed quickly and fits between each stud. After the batt has been installed, you’ll need a vapor cover to seal it off.

The barrier will prevent moisture from entering the insulation. Also, make sure that you have drywall around the garage, which is important if you want to prevent mold growth. This work is best left to a contractor.


Polystyrene is sheet insulation, which is great for bridging gaps between studs. It has a very tight fit and keeps all the air out.

When installing polystyrene, you should measure the garage insulation R-value, which measures how heat comes through the material. You should always look for a value in the range of 3.5 to 7.14.


Foam is another great option. You can install foam board instead of drywall. By using batt and foam board, you can get the best possible insulation.

You have to make sure that your city’s building codes allow foam board. Usually, they are okay as long as they’ve been tested against fire and can serve as a barrier in certain situations.


Do you know that foam that expands? That’s polyurethane. It’s sprayed into various gaps of the garage and then expands. It prevents the entry of elements and insulates the temperature inside and outside of the garage.

The foam has a starting r-value of 11 and keeps going up from there.


Blown-in insulation has become one of the most popular materials used in garage insulation. This cannot be done on your own unless you rent a specialized machine. The process involves opening a hole in the garage and then pushing cellulose inside.

The entire process only takes a couple of hours, and it provides great results. It’s never recommended to perform this method on your own because it can get messy, really fast.

How to Seal Your Garage

When you’ve installed your garage insulation, it’s important to inspect the entire area. This is because you want to make sure it’s sealed off.

A proper team should caulk the drywall bottom, and seal the floor. The entry door should have weatherstripping. You can buy a metal door for extra safety.

Examine all outlets, windows, and garage doors for leaks or issues, and make sure to address them and stop the problem as soon as possible.

The best approach to any of these issues is to communicate with your local contractor company, as they possess the most up-to-date information on how to make your garage safe and functional.

Garage Insulation Done Right

Now that you’ve finally uncovered the answers to the most pressing questions about garage insulation, you have come to realize how important it is.

Without proper insulation, it’s not just cold in your garage. You could be dealing with mold, moisture build-up, expensive energy bills, and other issues that can impact everyone within the household.

If you’ve insulated your home, you should also insulate your garage.

If you’re interested in installing an insulated garage door or you need to clean or repaint your garage, get in touch with us and we’ll help you out.