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Best Garage Door Insulation

The Best Garage Door Insulation Kit 2020

During the winter, garages can become incredibly cold and vice versa in the summer. However, using garage door insulation will target vulnerable areas within the door to prevent heat escaping in the cold or heat coming in when it’s hot.

The best garage door insulation kit is the Matador Insulation, which is available in two different sizes and has a simple tool-free installation.

Installing garage door insulation kits is fair easier than you would expect. All that is required are measurements to determine the correct panels for your door. Wooden garage doors don’t necessarily need an insulation kit unlike the metal alternative.

Garage Door Insulation Comparison

Garage Door InsulationPanelsR-Value
Matador DIY7/8' Tall & 8/9' Wide4.8
Owens Corning 5008247'4 Tall & 9' Wide8.0
NASA Tech8' Tall & 16' Wide7.0
Anco DIY8' Tall & 9' Wide9.0
Reach Barrier 30098' Tall & 8' Wide4.8
SmartGARAGE Reflective7' Tall & 18' Wide6.0
Cellofoam DIY Kit8' Tall & 9' Wide4.8
Reflectix BP240508' Tall & 8' Wide4.5

Another benefit of adding insulation to your garage door is the fact that it will make the garage quieter and more aesthetically pleasing. They also do not cause any issues with garage door openers as the panels are tailored to fit with minor trimming.

It may come to a surprise to many but buying insulation for garage doors is relatively cheap and long lasting with very little maintenance required. Paying a small amount extra for a top of the range kit is highly recommended.

Below is a list of the best garage door insulation kits that will keep the heat in during the winter and keep it out during the summer.

The Best Garage Door Insulation

1. Matador Garage Door Insulation Kit

The Matador garage door insulation kit is the most popular and for good reason. It’s simple to install with no special tools required and finished in a bright white to provide the garage with an attractive look that is easy to clean too.

Features of the Matador Garage Door Insulation Kit include:

  • Available in two different sizes
  • Insulation r-value of 4.8
  • Bright white surface that easy to clean
  • Scored panels for easy installation
  • No special tools required

This garage door insulation kit does exactly what you want, which is keeping the garage warm in the winter and cool during the summer. The brand claim that you can install this within less than a hour and the savings will pay for itself as you will be using less energy to maintain a comfortable temperature.

The two sizes include the standard size kit, which is suitable for a 7 foot tall and 8 to 9 foot wide door. The larger size is suitable for 8 foot tall and 8 to 9 foot wide garage doors. Overall, it is the best garage door insulation kit you can buy and offers great value for money with everything required for a simple installation.

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2. Owens Corning Garage Door Insulation

The Owens Corning garage door insulation kit is very popular across the US. The brand states their product provides 5 times better thermal performance when compared to an insulated door, which is very impressive.

In terms of the installation, Owens Corning claim that it will take approximately 1 hour and all that is required is a tape measure, knife, straight edge and a marker. The fastening system and flexible insulation make it a quick and easy installation.

Other eatures of the Owens Corning R-8 Kit include:

  • R-value of 8
  • Uses fiberglass panels with a white vinyl
  • Suitable for 9 feet wide and 7 feet 4 inch high garage doors
  • 20% reduction in noise levels
  • Easy to install pre-cut panels
  • Unique fastening system for easy installation

The Owens Corning R-8 kit is an excellent insulation kit for garages doors with everything included in the box. It’s also slightly cheaper than the Matador alternative above and offers excellent value for the money.

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3. NASA Tech Reflective Garage Door Insulation

The NASA Tech kit uses a reflective foam core that provides an efficient insulation for garage doors. In terms of the installation, it uses a heavy duty double sided tape, which makes it far easier than similar alternatives.

Features of the NASA Tech Insulation Kit include:

  • Insulation r-value of 8
  • Suitable for garage doors of 8 feet tall and 16 feet wide
  • Uses sound reductions technology
  • White vinyl finish on one side and the other is reflective
  • Reduces passage of radiant heat by 95%
  • Made in the USA

Finding garage door insulation kits that focus on double garages rather than just singular garage door can be difficult. Luckily, the brand has this covered and is the best double garage door insulation kit without the need of combining two single kits together.

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4. Anco Complete Garage Door Insulation Kit

Anco is a premium insulation kit for garage doors and they state that this kit will fit the majority of garage doors. It uses a mixture of fiberglass and polymer materials with a 2 inch thickness to provide superior insulation qualities.

In terms of the features of the Anco Garage Insulation include:

  • Insulation r-value of 9
  • Suitable for 9 feet wide garage doors
  • Easy to install with no special tools required
  • 2 inch thick construction

The Anco garage door insulation kit provides the best thermal performance compared against all the alternatives but you do have to pay a premium for this efficiency.

On top of the thermal performance, the insulation provides excellent noise reduction and makes your garage a more comfortable place to be.

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5. Reach Barrier 3009 Garage Insulation

Reach Barrier is another popular garage door insulation and is the cheapest within this article. It is a DIY insulation kit that blocks up to 95% of radiant heat to reduce winter heating loss and is fairly lightweight to prevent the extra strain upon garage door openers.

Features of the Reach Barrier Garage Insulation includes:

  • Suitable for garage doors of 8 feet wide
  • R-value of 4.8
  • Exceeds the latest ASTM fire codes
  • Lightweight so won’t slow door openers
  • Requires no maintenance or special tools to install
  • Made in the USA

The construction of the insulation is fairly unique with two layers of 5/32 inch bubble laminate between the radiant barrier, which provides the extra performance.

Overall, it’s a cheap garage door insulation kit that performs well and is simple to install, which is why its so popular throughout the US.

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6. SmartGARAGE Garage Door Insulation Kit

SmartGARAGE are a brand that produce a range of garage equipment and this is their new and improved insulation. It’s available in three different reflective finishes that include standard, dark wood and white.

In terms of the insulation coverage, it measures as 18 feet wide and 7 feet in height, which the brand claims is easy to install.

Other features of the SmartGARAGE Insulation Kit include:

  • Reflect 97% of radiant heat
  • R-value of 6
  • High quality aluminum reflective material
  • Includes heavy duty double sided tape
  • Box includes 4 individual rolls of insulation

Overall, it is a DIY garage door insulation kit that the brand claims can be installed in less than an hour. It is designed to create an air pocket, which maintains the temperature by reducing heat loss in the winter and reducing the heat by 8 degrees in the summer.

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7. Cellofoam Garage Door Insulation Kit

The Cellofoam Kit is designed to provide garage door insulation for standard 9 feet doors and comes with easy to follow instructions. There are 8 pieces to the kit that measure up as 20 x 15 x 1.24 inches in size and you will require two kits for double garage doors.

In terms of the construction, they are made from modified expanded polystyrene and a rigid foamed plastic with resilient closed cells.

Other features of the Cellofoam Insulation Kit include:

  • R-value of 4.8
  • Quick and easy to install
  • Professional and washable finish
  • Excellent physical strength and water resistance
  • Environmentally friendly and 100% recyclable

The Cellofoam insulation panels provide an effective temperature barrier and are built to the highest of standards. However, the main drawback is that they do come with a premium price tag but it won’t disappoint.

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8. Reflectix BP24050 Insulation For Garage Door

Another affordable garage door insulation kit is the Reflectix BP24050, which is very similar to the Reach Barrier alternative. It’s constructed of two highly reflective layers of film with two inner layers of insulating bubbles for superior insulation.

It’s important to note that this garage door insulation comes as a large roll. This makes it ideal for large surface areas but will it will require lots of trimming.

Other features of the Reflectix BP24050 include:

  • Insulation R-value of 4.55
  • Class A and Class 1 fire rated
  • Easy to handle and install
  • Inhibits condensation
  • Zero mess or itchy fibers

The Reflectix BP24050 kit is not only suitable for garage doors but it can also be used as insulation for roofs, walls and other applications. It’s an affordable option that comes in large rolls, which can be trimmed down to best suit your requirements.

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Garage Door Insulation Kit Buying Guide

Many people spend a lot of time in their garages, whether that is working on a car to using it as a gym. However, the garage is one place with the least-efficient use of energy since the garage door is made of wood, aluminum or steel.

They are usually uninsulated, which during summer or winter, temperature levels in the garage can reach both extremes. Investing into a garage door insulation kit will prevent this from happening and improve the efficiency of your home.

To help you make an informed buying decision, we have produced the below guide regarding DIY garage door insulation kits.

Insulating Garage Door

Steps to Install Garage Door Insulation Kits

Installing an insulation kit to your garage door is not as hard as you would think. It can be completed by yourself but having another person to help does make things much easier. Below are some steps that you to follow in order to achieve a simple and stress free installation.

Preparing the Surface

As you are preparing the inside of the garage door, there is no need to worry about the state of the garage door facing outwards. However, installation of an insulator needs adhesive which requires a clean surface to stick to, thus cleaning of garage doors is vital.

To ensure that the garage door is completely clean, you can use either acetone or a degreaser and later wiping it down with warm water. Once it dries up, you can then apply the adhesive.

Application of the Adhesive

Double sided tape is a popular choice for a strong adhesive and most kits comes with multiple Velcro adhesive squares too. For tab installations, you should follow the instructions on the manual because the application of adhesive tabs is the most time-consuming of the whole process.

The next step is removing the protective covers from the tabs and sticking them to the door. You can then follow up by removing the second protective cover from the adhesive part in contact with the barrier.

Test Fit Some Panels

Before removing the outer protective adhesive casings, test to see if the panels fit. Carry out a test install before the adhesive sticks to the panels because this will enable you to determine which panels need adjustment to fit perfectly.

Best Garage Door Insulation Kit

Trimming of the Panels

Overlaps on the edges of the barrier’s insulation is not a bad thing but can be useful in ensuring the garage door insulation is held in place. You should measure the panels, adding several inches before carefully cutting. It is more useful to expose the adhesive top rows before installing the top of the installation.

Subsequently, this is followed up by cutting the panels to leave a few inches at the bottom to wrap into the panel supports of the garage door.

Installation of Radiant Barrier Insulation Panels

Exposing the top row of adhesives and following that up with installing a panel at the topmost portion enables you to stretch the material before pushing it onto adhesive tabs. It eliminates any wrinkles from showing after installation is complete.

Once the top part is in position, the panel’s lower part is removed out of the way exposing the adhesive on the remaining tabs below. It is followed by stretching the lower portion into place and application of pressure on the adhesive squares to ensure they properly stick.

Types of Insulation

The various insulation kits come with different properties, differentiated by thickness, durability levels, shapes, cost per size, different life spans and other factors depending on your needs. Below are the three most common types of insulation.

Reflective Foil

This insulator is sold on rolls and usually has a thickness of about an inch and a half. Purchasing the reflective foil can either be a single file or double file, depending on your requirements.

In between the two aluminum foils is a layer of polyethylene foam, with double foil insulation coming with two coats of this foam. Despite not being aesthetically pleasing, the reflective foil is a very useful insulator especially for regions with hot climates as it is reflecting the radiant heat. Furthermore, its R-value ranges from 3.5 to 6 but this depends on how you apply it.

Polystyrene Foam

Usually sold in large sheets, polystyrene foam needs to be cut to a size equivalent to that of the garage door. This material is very rigid and provides high insulating values despite being of relatively little thickness. Furthermore, the material is more robust to work with in comparison to reflective foil and offers better insulation.

Panel Kits

For those who value aesthetics, panel kits is the best garage insulation to go for and are easier to install. They are made of plastic laminated polystyrene or fiberglass and the kit comes with pre-cut panels that comfortably fit into the channels of the garage door frame.

Polystyrene offers better insulation in comparison to fiberglass, but fiberglass is more resistant to mold and water. Installation of both these panels is fairly simple with both taking around an hour to install.

Factors to Consider when Choosing Insulator

Not all garage door insulation kits are the same and many can be fairly expensive. For that reason, its essential that you understand the basic factors to consider and what to look out for in order to get the best value for your money.

Effectiveness of Insulator

All garage door insulation comes with a R-value rating system. It is a system that measures how effective the insulation is at insulating the garage door. Insulation with a higher R-value will provide better insulating properties.

Installation Cost

Depending upon whether you plan to fit the garage door insulation yourself or not, you may have to budget in the installation. The installation is fairly easy but it is understandable that not everyone has the time to do it themselves.

The Weight of the Insulator

For those that use an electric garage door opener, the added weight of the insulator may slow down and cause additional stress to the opener mechanism. If this is the case, you may want to look into upgrading the opener before adding additional weight to the door. However, most openers can handle a little more weight on the door from the insulation.

insulate garage door

Research your Garage Door

Not all garage doors are the same and you may not require that much garage door insulation. However, if the door has no insulation or padding whatsoever, you will want a complete kit that can be installed fairly easily.


Insulation for your metal garage door should be an essential. It will keep the heat inside the garage during the cold winter months and the heat out during the summer. This instantly boosts the efficiency and will pay for itself when you factor in wasted energy costs.

All the recommendations in this article are affordable and suit the majority of garage doors from single to double and even custom sizes. We advise that you take your time with your measurements before choosing a garage door insulation kit. The last thing you would want are panels that are too small or those that require lots of trimming.

We also recommend spraying garage door lubrication within any of the moving parts that will be covered up by the insulation. This saves time removing the insulation in case there are any problems in the future.

About The Author

procarreviews author

Dan is an automotive journalist and owner of over 10 cars ranging from supercars, luxury modern cars, classics and your good old beater cars. He always like to get his hands dirty with nut and bolt restorations and detailing sessions with the latest products. Feel free to read more about our team.

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