The 9 Best Garage Door Insulation Kit [Easy Installation]

Cooling down your garage can be as simple as installing a garage door insulation kit. You’ll be able to reduce the temperature in your garage by up to 25 degrees and keep your garage warmer during the winter.

I looked far and wide, and the Matador EP1323054_02 was one of the best garage door insulation kits I could find.

The Reach Barrier 3009 is also a great budget kit if you’re looking to save some cash.

Below you’ll find 9 garage door insulation kits with measurements to find the perfect garage door insulation kit for you.

Our Top Picks

Matador SGDIK001 Garage Door Insulation, Large, White
Matador SGDIK001 Garage Door Insulation, Large, White
  • Installation in 3 easy steps
  • Doesn’t require any glue or adhesive
  • High-impact polystyrene laminate
Reach Barrier 3009 Garage Door Insulation Kit
Reach Barrier 3009 Garage Door Insulation Kit
  • Affordable
  • Lightweight
  • Easy installation
NASA TECH White Reflective Foam Core
NASA TECH White Reflective Foam Core
  • Made in the USA
  • For extra large 2 car garages
  • Clean look

Best Garage Door Insulation Kit

Matador SGDIK001 Garage Door Insulation, Large, White

The pre-scored panels will make it super easy to install on an 8-9 foot garage.

Key Features:

  • R-Value: R4.8 for 1-1/4” thick panels
  • Dimensions (Panel): 23. 25″ H x 54″ W x 1. 25″
  • Weight: 10 lbs
  • Panels per kit: 8


This insulation kit will cool down your garage in less than an hour of installation.

You’ll be able to transform your garage from a hot, miserable place to a cool and refreshing relaxation zone.

Use your garage for a workshop, gym, or recreation area during the hot months. You’ll also be able to keep heat inside of your garage during the winter months if you live in a cold area.

The panels come pre-scored for easy and quick installation. You’ll only need a few basic tools to install, no additional tools should be required on your end.

If you plan to cool your garage, garage insulation should be one of your first purchases.

It’s a no-brainer that a cooler garage is easier to keep cool and requires less energy to maintain.

This kit is also a great way to seal your garage and reduce the noise coming into your garage.

Included with the Matador EP1323054_02 are 8 high-impact polystyrene laminate panels 23. 25″ H x 54″ W x 1. 25” thick. It fits an 8-9 foot garage. Measure before you purchase.

  • Cools down garage during summer
  • Keeps heat in during winter
  • Not for large garages

Best Budget Garage Door Insulation Kit

Reach Barrier 3009 Garage Door Insulation Kit

While it won’t provide you as much protection as a standard insulation kit, this is a no-fuss budget option to consider.

Key Features:

  • R-Value:  AtticFoil™ works to block radiant heat (97%)
  • Dimensions (Panel): 25 x 13.4 x 13.2 inches
  • Weight: 3.32
  • Panels per kit: 8

This is a great budget garage insulation kit that comes with 8 25 x 13.4 x 13.2 inches panels.

Instead of thick, white panels, you’ll be installing 2 Layers Of 5/32-Inch Barrier Bubble Laminated Between 2 Layers Of Reflective Polyethylene which reduces the heat inside of your garage.

The acrylic adhesive is heat tested to ensure that you won’t have to do any maintenance over the years.

All you have to do is clean your garage door, peel off the back of the Stick’ems adhesive, and push the radiant barriers in place.

One downside is that this kit is not going to be as effective as the more expensive options. You do however end up saving quite a lot of money.

The Reach Barrier 3009 provides immense value for a tight budget. You don’t need to suffer any longer or spend a ton of money to insulate your garage door.

  • Easy to install
  • Affordable
  • Not as good at insulating like more expensive options

6 More Garage Door Insulation Kits

NASA TECH White Reflective Foam Core

A great alternative, this garage door insulation kit is meant to last.

Key Features:

  • R-Value: R8
  • Dimensions (Panel): 24 x 18 x 17 inches
  • Weight: 10.63 pounds
  • Panels per kit: 8

You’ll be able to obtain an R8 R-value with this kit. You’ll be able to reduce the inside of the garage temperature by up to 30 degrees in the summer and utilize your garage during the winter.

Made in the USA, it’s also entirely non-carcinogenic.

Mike, the owner of NASA TECH, provides excellent customer service. Should you need anything, don’t hesitate to give him a call. He’ll even explain how the NASA TECH White Reflective works and how much it’ll cool down your garage.

You shouldn’t have any problem installing this as a solo project, just make sure to measure before to make sure that it will fit.

Unfortunately, you’ll have to measure and cut each panel which can take some time. If you aren’t handy, then you may want to look into pre-scored solutions.

Purchasers mention that they realized more than a 20-degree drop in temperature after installing and they saved on their energy bill.

  • Amazing customer service
  • Up to 30 degrees colder during the summer
  • May come in 8 panels rather than 4, be aware before purchasing

US Energy NASATECH (Pre-Cut for 16 Panel)

Great for large garages that get hot as heck during the summer.

Key Features:

  • R-Value: R8
  • Dimensions (Panel): 23.8 x 19.5 x 16.8 inches
  • Weight: 8.03 lbs
  • Panels per kit: 16


Have a big garage door? The US Energy NASA TECH is the perfect garage door insulation kit for large garages.

You’ll be able to apply the 5/16″ (one of the thickest on the market!) foam core with super-duty double-sided foam tape to create an air pocket that gives you up to an R8 r-value insulation.

It’s extremely lightweight and you’ll have no problem installing the pre-cut panels. You won’t need any tools outside of a knife, pencil, and measuring tape. The aesthetic of the US Energy NASA TECH is great, you won’t have any white panels getting dirty over time!

Non-toxic, noncarcinogenic, and non fiberglass to keep you safe.

Purchasers found even HOT states like Texas were no match for this garage door insulation kit.

I like that the panels are pre-scored, making it easy to install.

Was difficult to find any downsides of this product other than you’ll have to install it yourself.

  • Perfect for large garage
  • Up to 25 degrees less during the summer
  • Some reviewers mention their glue came off

Owens Corning Garage Door Insulation Kit

The cleanable vinyl surface will help reduce the noise on your single uninsulated garage door.

Key Features:

  • R-Value: R8
  • Dimensions (Panel): 22 x 54 x 2.25 inches
  • Weight: 11.8 lbs
  • Panels per kit: 8


The Owens Corning Garage Door Insulation Kit offers 5 times better thermal performance compared to an uninsulated door.

If noise is a problem, Owens claims that you’ll be able to get a 20 percent reduction in noise levels after installation.

Installation should only take you under an hour for a 9-foot door. You will need a knife, tape measure, and marker to get this installed perfectly.

Reviewers mentioned that while this kit does a good job, you will need to buy Gorilla Tape otherwise the clips they give you won’t be enough.

You’ll be satisfied with the flexible material that resists denting to keep your investment maintained. Clean the vinyl surface with detergent should it ever get dirty.

Other than needing to purchase additional tape, the Owens Corning Garage is another great option to insulate your garage.

  • Reduces up to 20 percent noise
  • 5 times better thermal performance compared to uninsulated door
  • You’ll want to buy gorilla tape to install properly

Check Price

NASATECH White (Pre-cut 8 Panel)

If you have a one car garage, no need to spend on larger units.

Key Features:

  • Value: R8
  • Dimensions (Panel): 25.5 x 15 x 15 inches
  • Weight: 6.59 lbs
  • Panels per kit: 8

The NASA TECH White Garage Door Insulation Kit is the perfect solution for a one-car garage. With 8 panels, it’ll fit any garage with the dimensions 8×7, 8×8, 9×7, or 9×8.

You’ll be able to reduce the temperature by 8 degrees in the summer, but a few reviewers found that they were able to exceed these expectations.

The material is nontoxic and noncarcinogenic, you’ll be impressed with the very clean look.

Take back your garage during the summer or winter, you won’t have to suffer much longer with the NASA TECH White Garage Door Insulation Kit.

The only downside is that you’ll have to install it yourself. For such a great combo of raving reviews, price and performance, this is one heck of a deal.

  • Clean Look
  • Reduces temperature up to 8 degrees
  • Only for one car garage

Ant NASA TECH White Reflective Foam Core

Great for deadening the sound in your garage while fitting large sizes up to 18×7′.

Key Features:

  • R-Value: R8
  • Dimensions (Panel): 25 x 16 x 16 inches
  • Weight: 7.83  lbs
  • Panels per kit: 16


The Ant NASA TECH garage door insulation kit was created to fit wide garages. You’ll be able to fit this to a 18ftx8ft garage door with ease.

Purchasers of this product mention that it did take them quite a while to install, up to 3 hours. You’ll want to be prepared if you purchase this as you’ll need to measure and cut each panel.

If you need a large garage door insulation kit, it’s going to be hard to beat this product with its high R-value and affordable price.

  • Perfect for wide and large garages
  • Can take up to 3 hours to install

Reach Barrier 3122

Lighter and thinner than other kits while saving you money.

Key Features:

  • For 8×8 garage doors
  • Blocks 95% of radiant heat
  • Tear resistant



The Reach Barrier 3122 is one of the best garage door insulation kits around. It’s a DYI kit that’s easily applied and blocks up to 95 percent of heat.

Each kit covers an 8×8 foot garage door which is perfect for a one-door garage.

Even if you own a large garage, this product will save you some money over the other garage insulation kits.

You won’t need any special tools. Place the extra strength adhesive pads onto your garage and attach the Reach Barrier 3122 right onto the pads. Boom, you’re finished!

With 4 times the tear resistance of competing brands, this will keep your garage cool as long as possible.

This kit while affordable, won’t be able to compete with rigid foam in terms of performance. It’s still a great deal once you factor in the price.

  • 4 times tear resistance of competing brands
  • Easy to install
  • Only for 8×8 foot garage

Best Garage Door Insulation Kit FAQ

What is a good R-Value for a garage door?

A good R value for an attached garage door is between R12 and R16. If it’s detached and unheated, you shouldn’t need to worry too much about insulation as they require an R value of 0-6.

How to Install a Garage Door Insulation Kit?

1. Start by cleaning your garage door and making sure that no dust is left on the panels. It’s a good time to give it a deep cleaning, too.

2. Get your panels out on a flat surface

3. Mark each section on your garage door in two places, each mark should be halfway from the edge and the center of the panel.

4. Peel the paper off the glue, and then place the adhesive where you marked on your garage door panels

5. Then attach the retainer clips that came with your garage door panels. You may not have retainer clips depending on what type of garage door insulation kit you purchased. If this is the case, then check with your manufacturer’s recommendation.

6. Measure the length and height of your garage door panels, then add an inch to both measurements and cut out your garage door insulation panels.

7. Tuck the insulation into your garage door panels.

8. Cut a small hole in your insulation panel once secured, where you attached the retention clips. Attach the other side of the retention clip and then you’re done!

9. Continue the process until you’ve installed your garage door insulation kit on your entire garage door.

Does insulating a garage make a difference?

Insulating a garage is going to make a huge difference in not only temperature, but it will allow you to install air conditioning or heating without all of your expensive cold air leaking out.

If you don’t install insulation, any attempt at heating or cooling your garage will be futile.

I recommend starting to insulate the garage door before you insulate your entire garage.

This will give you a small step towards your final goal, and you may realize you don’t need to spend any more money after buying one of the best garage door insulation kits.

Garage insulation can provide a 5 to 20 degree temperature difference which can make your garage tolerable in the winter or summer.

Insulation will keep hot air in and will keep heat out during summer by creating a thermal barrier before getting into your garage.

What are garage door insulation material made out of?

Garage door insulation kits are made out of a few different materials. The easiest to apply will be reflective foil.

You’ll simply put the foil on your garage doors and you’ll be on your way to keep the radiant heat out.

More expensive options are made out of polystyrene laminate panels. This type of material is the same type of material that garage door manufacturers use to insulate pre-insulated garage doors.

Another type of garage door insulation material is white reflective foam. This is the same type of material that NASA utilizes and it looks quite sleek as well.

Does insulating a garage door make it too heavy?

Most insulation kits for garage doors are created with the weight in mind. Most of them are lightweight like the reflective foil option which won’t put a significant amount of weight on your garage door.

If your garage door is made out of wood, it’s going to be much heavier than a standard garage door. I’d then check your garage door opener and see how many pounds it’s rated for as it may be close to reaching the limit.

Can an existing garage door be insulated?

Yes, if you don’t have a pre-existing insulated garage doors, then you can get garage door panels and simply apply them with double sided tape and increase the energy efficiency of any air conditioning or heating method you choose.

What to Look for in a Garage Door Insulation Kit?


R-value is the measurement of how well the insulation can prevent heat from coming into and outside of your garage. When looking for a garage door insulation kit, you’ll want the R-value to be R6-9 depending on where you live.

If you have a detached and unheated garage, then you only need an R0-6 value. Unless you are going to work a lot in your garage, then you can go with R6-9.


Most insulation kits are going to be made from rigid foam made from polystyrene, extruded polystyrene, and polyisocyanurate. You also have options to use cheaper Silvertanium-type insulation kits that are fairly thin and won’t put a lot of strain on your garage door opener.

The rigid foam will offer better insulation while the Silvertanium is going to offer easy installation and won’t look like an eye sore.

For the hottest garages, go with rigid foam. If you’re on a budget, then silvertanium is also a good bet.

Easy to install

You can purchase garage door kits that are pre-measured to make them easier to install. If you aren’t handy and don’t want to cut and measure for a few hours, then going with the pre-measured solution is going to make installation easy.

The aluminum-type kit is also easy to install as you won’t need to deal with cutting through rigid foam.

Where you Live

How hot it gets where you live will determine that R value kit you’re going to need. The hotter the area, the more R value you’re going to want to get. If you also have a heated and cooled garage, then you’ll want to consider R values of 12 or higher.


Measure your garage door to ensure you’re buying the right size garage door insulation kit. Each garage door is going to measure differently, and each insulation kit is rated for a different sized garage.


If you have a wooden garage door, that means it’s heavy. More weight may strain your garage door opener to its limit. Check your garage doors opener’s weight capacity and the weight of the garage door kit.

You don’t want to put more strain than need be on your garage door opener or it may malfunction.

Final Thoughts

The best all-around garage door insulation kit I could find was the Matador EP1323054_02. If you’re on a budget, then you may want to take a look at Reach Barrier 3009.

Insuting your garage door is going to be the first step before you invest in garage air conditioners or electric garage heaters. Garage door insulation kits are a step in the right direction, but overly hot areas will need some added help.

About Roy Cohen

I'm Roy, founder of Hack My Garage. I started out like most not knowing how to hammer a nail, but now I know more than most people about home improvement and DIY. I want to spread my wealth of knowledge with the world and hope to make it a better place.