How to Be Sure Your Garage Is Properly Insulated for Winter

When the temperatures start to drop, it's time to consider the options for winterizing your home. We want to share a few tips and help you save both energy and money in the process!

Lots of things need to be done to make sure your home is ready for winter. You have to consider the landscaping outside, the heating unit in your home, and more. Our checklist is made to be sure all your garage tasks are taken care of before winter comes.

We want to help you save your hard-earned cash, so we've pulled together inexpensive winterization choices. This can also help cut down on your utility bills!

This garage door is an Eastman E-21 design, 9' x 7' size, Ice White doors and overlays, 8 lite Orion windows.

Do you like this look? These garage doors are in the Eastman E-21 Design, 9' x 7' size, the doors and overlays are in the Ice White Color, the windows are 8-lite Orion.

Start out with garage door preparations

This garage door is an Eastman E-21 design, 9' x 7' size, Ice White doors and overlays, 8 lite Orion windows.

You like this look? This single garage door is a North Hatley LP Design, Desert Sand color, windows with Richmond Inserts.

Are you in the know about R-values?

When it starts getting cold outside, the same happens to your garage if outdoor air can get inside. The best way to avoid this is by having excellent insulation, which ensures it stays warm inside even when it's chilly outside. The R-value is how much insulation is present or the resistance the feature has to the flow of heat.

Having an increased R-value means that you get better performance from the insulation and less heat loss. The right level depends on where you are adding insulation and how the weather is where you live. For example, an attic will have a higher R-value than a floor since the attic needs more insulation.

The proper level of insulation for a typical garage

If you have an attached garage, it's an access point to the home, the same as the front or back door. It also influences your energy costs and how warm your home interior is. Choosing the proper R-value for your garage is based on these factors:


If there's no need for heavy insulation, R-12 will be an appropriate level to shoot for. However, when better insulation is needed, R-16 is recommended instead.

Attached vs. detached

Detached garages typically need a lower R-value and are often not heated. However, attached garages will affect your heating bills and a value of at least R-12 is the best option.


Those who use their garage on a regular basis or have a living space over it should go with an R-16. However, if people often spend time in the space, choose a higher insulation level for your comfort.

Materials used for insulation

There are two different materials used to insulate garage doors, each of which has its own features:

Polyurethane is a foam that is placed between the interior and face garage door skins. Heat is used to make it expand so it fills in all the gaps. The expansion is fast and leaves no holes, which makes it superior to polystyrene. It's solid and thick with a higher resistance to bending, as well.

Polystyrene, also known as Styrofoam, is based in a large sheet that is inexpensive and easy to install. However, it's far less dense than polyurethane so it is not as effective at insulating a garage door.

See the difference between polyurethane (on the left) and polystyrene (on the right) insulation for garage doors

See the difference between polyurethane (on the left) and polystyrene (on the right) insulation for garage doors.

Additional things to remember

Bottom garage door gap

Gaps can occur below the garage door, which lets in insects, dirt, and water. All of these are things you want to avoid having in your garage. Look over the bottom garage door weatherstripping to determine whether it's damaged and should be replaced. Consider a threshold if the floor isn't even.

Garage door opener

Some garage door openers will pull the door down closer to the ground to reduce gaps. You can go over your manual to see what settings you can change to make sure the door is in the correct position.

Garage door gap at sides and/or top

The perimeter weatherstripping (or seal) can age, which may lead to tearing and cracking, which lets in the outside air. Stop molding is an option that is made of PVC but created to look like wood.

It should be screwed or nailed at the top and on both door jambs. This material has a rubber flange on one side that is made to rest on the face of the door. This ensures that less air, rain, and snow can get inside.

How insulated are the ceilings and walls?

Walls and ceilings

The price and amount of insulation needed depends on the required R-value. Remember that an exterior wall doesn't have the same value as a ceiling. Warm air moves up and will leak out the roof. Bringing in a professional for help will assure you get the suitable materials, and they are installed properly.

Prefer to do it yourself? Use the 4 easy steps from :

01: Make sure the walls of your garage are cleared off.

02: Deal with any damage and make sure gaps are sealed.

03: Add in the fiberglass insulation.

04: Put down drywall on top of the insulation.

In addition, realize there are many insulation types with benefits and disadvantages. Check out their blog to learn more about keeping cold air from going through the garage door, ceiling, and walls.

Insulate your walls to save energy costs with foam.

Insulate your walls and ceilings adequately, and you will save energy! Image from Pixabay.


The primary purpose of garage windows is to add natural light. It can also make the space look more appealing. The installation has to be done right to keep out the cold. The good news is that you have several options.


For ease of use and a quick installation, consider weatherstrip tape. Cut it down to the correct size and put it around the window frame. This will prevent air from leaking through the windows.


Caulk is beneficial, but it can crack as time passes. So inspect it annually to make sure it's in good shape. You can view this article to find out which caulk to use and how to install it.

Window treatments

Thermal windows can look great and help with heat loss. The material is thick and made to reduce energy costs. As a result, you'll get extra insulation and cheaper utility bills.

Note: Use these tricks for garage windows, as well as the ones in your home.

Outlets and light switches

Many people forget to seal up their wall switches. Based on Conservation Mart, up to 5% of the air infiltration in a home is courtesy of electrical outlets.

Check out these 7 easy ways to better insulate the switches and stop heat loss. You can seal all kinds of junction boxes with just a few items.

For example, you can add foam outlet gaskets to keep air from leaking through tiny openings. Use this guide to keep cold air from getting inside.

It's essential to cut down on garage condensation

When water reaches a cold surface, such as a garage door or floor, condensation is an issue. While most garage doors are well insulated, you should inspect the area for any leaks.

Water and a garage floor don't mix

The first step is to have good drainage to keep water from coming into the garage. A slope can prevent slick grounds or flooding. It's essential to frequently inspect the floor to make sure no leaks or cracks are present.

You should also realize that humidity can cause your garage to have heating issues. Condensation also may damage the garage door itself. Both moisture and bacteria can become huge issues fast if the garage has condensation.

A garage door that keeps rainwater from running in your garage.

This garage has the proper garage door seal and floor finishes to prevent water from leaking.

Two solutions that can help with these issues are a dehumidifier and a floor coating.

Reasons to heat the garage

The garage can be heated in several ways, including a sizeable radiant floor heating system, a small portable unit heater, or fiberglass insulation. But why should you keep the garage warm? For the reasons below and more:

● Prevent damage to pipes and garage door components

● Ensure your appliances and belongings are safe from low temperatures

● Avoid the presence of moisture

● Keep your vehicle battery life extended

● Optimize the temperature inside

Are you still looking for answers to questions about garage door insulation?

With the advice above, you know the best way to insulate the garage correctly. In addition, we've shared some top tips to ensure you keep warm air inside and prepare your home for the cold of winter.

Have you considered garage door repair and maintenance options?

Prior to entirely replacing the garage door, talk to the professionals at Elite Door of New England. We can visit your location and make sure all the components of the door are in great shape before it starts getting cold. We also carry all of the possible hardware accessories you might need!

You can also bring in experienced, certified experts to handle garage door maintenance on your behalf. Our garage door technicians know all the tricks to get things done properly and efficiently. They can save you time to do everything else you need to do around the house.

Have you realized the garage door is preventing you from appropriate garage insulation? Ready to replace it? Contact us at 603-833-7135!

When purchasing a garage door, you need to think about size, style, color, and much more. Our top garage door professional will help you make the best choices, so you get a garage door that meets your needs.

First, take a look at our image gallery to see how different doors look on homes like your own. You can also visit our Design Centre to build the garage door of your dreams.

We're happy to provide you with a free quote by email so you can get started with accessing the perfect garage door for your home. We're excited to meet you and help you choose a garage door that works perfectly for your needs.

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