For many of us, our garage door will be the biggest opening to our home. That means excellent insulation is essential.
But if your existing garage door isn’t as well insulated as you’d like, don’t despair. There are lots of kits out there to fix the problem.
We’re going to take you through the seven best garage door insulation kits on the market today. We’ll tell you everything you need to know about them. And our buying guide will help you identify the features that are most important.
Ready? Let’s take a look at some of the best products out there right now…
The Best garage door insulation kits reviews In 2021
1. US Energy NASA TECH White Reflective Foam Kit
This white reflective foam core insulation will cover a garage door 18 feet wide and 7 or 8 feet high. That’s big enough for most doors to two-car garages.
It’s thin and lightweight, so it won’t put strain on your door or opener. But it will still provide an impressive insulation value of R8.
That’s because it’s formed from three layers. On the side that will be next to the door, there’s a thin layer of foil. This is covered by a thicker layer of foam, with a final layer of white vinyl on top.
Together, those three layers will keep your garage warm in winter and cool in summer. If you’ve been put off using your garage as a workspace when the weather heats up, worry no longer. This kit can reduce the internal temperature by as much as 30 degrees Fahrenheit.
The white finish will also keep the interior of your garage door looking clean and smart.
The foam is fire retardant, and meets all international fire codes. It’s also good at reducing sound transmission. So if you keep your drum kit in your garage, your neighbors may be pleased you’ve made the purchase!
You’ll get four rolls of foam in the package, together with strong double-sided tape to attach it to your door. The tape is robust enough to cope with extreme temperatures. So you won’t need to worry about your insulation at either the height of summer, or the depths of winter.
On most doors, you’ll find installation is simple. A razor and squeegee are included in the package, and the foam is easy to cut. All the instructions are nice and clear too.
There are just a couple of things to bear in mind here. If your garage door has hurricane braces, this won’t be the best choice. You’ll need to remove one brace at a time to install the foam. And finding the holes to reinstall them afterwards is not straightforward. The job takes a lot of time and patience.
It’s a similar story for Wayne Dalton garage doors. You’ll need extra tape and panels for these, and it’s a trickier job. You may also find variations in the color of the foam and tape when buying extra.
But if you don’t have hurricane braces or a Wayne Dalton door, this is a great product. And we’ve heard good reports about the company’s customer service too.
Great insulating properties
Lightweight and easy to install on most doors
Smart clean finish
Installation is more time consuming if you’ve got hurricane braces
2. US Energy NASATECH Pre-Cut Reflective Insulation Kit
The second kit from US Energy to make our list, this consists of foam sandwiched between foil. The shiny silver finish may not be to everyone’s taste. The design does, though, create the thickest insulating panel on the market, between four and five 16ths of an inch.
As long as it’s correctly installed, the insulation here has an R value of 7 to 8. That will have a big impact on thermal gain in summer, and heat loss in winter. We’ve heard reports of summer garage temperatures falling between 15 and 25 degrees Fahrenheit with this in place.
The package includes four rolls of insulation, each one 2 feet wide and 18 feet long. It can be cut to cover garage doors of 16 feet or 18 feet wide, and 7 or 8 feet tall. And if you have specific needs, the manufacturer will cut to your requirements if you message them before ordering.
Also included in the package is a razor, strong double-sided tape, and a squeegee to help with installation. The squeegee is used to go over the tape once it’s in place, helping it adhere firmly to the foam. The instructions are easy to follow, and you can expect to finish the job in around four hours.
We have, though, heard of some instances where the double-sided tape has been substituted for Gorilla glue spray. Customers who’ve tried to use the spray haven’t found it as effective, particularly in high temperatures.
And in one case, neither tape nor glue spray was included. If you order the kit and experience this, get in touch with the manufacturer. Buying tape that’s robust enough to hold in both high and low temperatures is expensive. There’s no reason you should absorb this extra cost yourself.
The Owens Corning insulation kit comes in a choice of two, four or eight panels. Start with the eight-panel pack and add more if necessary, depending on how much area you need to cover.
The eight-panel pack will give you sufficient insulation for a door 9 feet wide by 7 feet 8 inches high. That will be enough for most single-car garages.
The insulation has an R value of 8, meaning it will make a significant difference to your garage temperature. It’s thicker than the US Energy foam panels, at about 2.2 inches.
But it’s also heavier. Be prepared for it to add to the weight of your garage door. If you’re using eight panels on a one-car door, though, you’re unlikely to need to adjust the springs.
The insulation is made of fiberglass with a vinyl coating. It’s soft – almost like adding cushions to your door. The white finish is clean and smart, and it’s washable too. So if you have any spills in your garage, you won’t have to live with the evidence.
The fiberglass isn’t the easiest to cut. A utility knife or box cutter alongside a straight edge will give you a good result. Make sure you use the gloves included in the package as you work. Fibreglass can cause nasty cuts.
The kit includes clips to attach the insulation to your garage door. They work fine to hold the center of the panels to the door, but the edges are a different matter. If you choose this kit, do yourself a favor and buy some tape to hold the edges in place.
The taping does add a bit of time to the installation process, but it’s all straightforward. Expect to take about an hour to cover your door. And be prepared to vacuum up fiberglass afterwards if you have to cut the panels.
Overall, this is an inexpensive and effective kit. Just make sure you buy extra tape to go with it.
Effective thermal and acoustic insulation
Wipe-clean vinyl cover
Smaller packs available if you need a little extra
The clips included in the package need to be supplemented by tape for a secure fit
Will add more weight to the garage door than other options.
4. Atlas Matador Garage Door Insulation Kit (Our Top Pick)
For a smart and effective insulation solution, check out the Matador kit from Atlas.
It’s available in a range of sizes. You should be able to get a good match, whatever the size of your door. The large kit will provide sufficient insulation for a garage door 7 feet tall and up to 9 feet wide.
The insulation here consists of polystyrene laminate panels. Each one is 20.25 inches high and 24 inches wide, and you’ll get 8 of them in the large pack.
The panels are 1.25 inches thick, but the polystyrene construction means they’re very light. They won’t put any strain on your door or opener. As acoustic insulation, they’re very effective.
When it comes to thermal insulation, the R value is lower than other options on the market at 4.8. If you live in an area with more extreme temperatures, it won’t be the best option.
It is, though, one of the easiest kits when it comes to installation. You won’t need clips, spray glue or even double-sided tape. Simply cut the panels to the correct size and slot them into place behind the vertical rails. You’ll be able to insulate a single-car garage door in under an hour.
The panels are pre-scored to make cutting easier. You’ll get best results by moving the blade of a knife repeatedly in the same direction. This will produce a cleaner cut than attempting to saw through the polystyrene.
It is, though, a messy job. Expect to have bits of polystyrene all over the floor by the time you’ve finished. You’ll want your vacuum cleaner on standby!
But when it’s all in place, the firm white finish looks clean and smart. And you’ll get exactly the same level of performance as a pre-insulated garage door.
Great acoustic insulation
Exceptionally easy to install
The thermal installation is less effective than some other materials
Cutting through the polystyrene is a messy business.
The 3009 insulation kit from Reach Barrier is one of the most cost-effective on the market. So what do you get for your money?
Well, the insulating material here is a 5/32-inch layer of bubbles sandwiched between foil. It’s one of the thinnest solutions on the list. It will nevertheless block up to 95 per cent of radiant heat – not bad. Expect to see a reduction of around 10 to 25 degrees Fahrenheit in your garage on a hot summer’s day.
If you’re in an area with particularly low or high temperatures, however, you may prefer something more robust. One option is to use this barrier on top of polystyrene to increase the insulation.
On the plus side, this meets all fire regulations and requires absolutely no maintenance. Once it’s up, it’s up. And it will add virtually no weight to your garage door. If you’ve got an automatic opener, it won’t affect its operation at all.
Double sided sticky tabs are included to attach the insulation to your door. Installation is quick and simple, and you won’t need any special equipment. Unlike fiberglass options, you won’t need protective gear either. And unlike polystyrene, there’ll be nothing to vacuum up after you’ve finished.
For best results, leave a small gap between the surface of the door and the panel. This will create an air pocket that will increase the level of insulation. Apply one sticky tab to each corner of the panel and one in the middle, and it should hold securely.
In summary, this is an inexpensive and user-friendly option. For garages that aren’t exposed to very high or low temperatures, it’s an good choice.
Cellofoam’s kit is very similar to the Matador. It too uses laminated polystyrene panels – in this case, High Impact Syrene, or HIPS. The insulating properties are exactly the same, with an R value of 4.8.
The installation process is pretty much the same too. The panels are pre-scored so that they’re easier to cut to size. You’ll need to slice through them with a sharp knife or razor. Then just slide them into place between the upper and lower rims of the panels. No glue, tape or stickers are required.
As with any polystyrene panel, though, be prepared to do some cleaning up afterwards. When you cut into it, you won’t be able to avoid small particles of polystyrene going all over the floor.
The Cellofoam panels are slightly thicker than the Matador kit – 1.5 inches as against 1.25 inches. The lightweight material means they still won’t add too much weight to your garage door. For a single-car garage, expect the additional weight to be around 13 pounds.
You shouldn’t need to adjust your springs after installation. And if you have an automatic opener, it won’t require much additional effort from the motor.
The extra thickness does, however, mean that they require slightly more effort to bend during installation. It’s still an easy job – most people will be able to complete it in less than an hour. And you’ll get very good acoustic insulation when it’s in place.
The vinyl finish is white, so your garage will be left with a clean, fresh appearance. It can be wiped clean in case of any spills, so it will stay looking smart. And if you want to paint over it, you can do that too.
The panels come in packs of different sizes. Prices are generally about 10 per cent lower than for the equivalent Matador pack.
7. SmartGARAGE- Reflective Garage Door Insulation Kit
This kit from SmartGarage uses closed cell polyethylene foam sandwiched between aluminum foil.
The result is a lightweight insulation that’s effective at both reducing sound transmission and keeping the heat in – or out. The R value is 6. Expect this kit to reduce the temperature of your garage by about 8 degrees Fahrenheit in summer.
The aluminum foil will also resist mold and won’t be affected by moisture or humidity. It’s about 1/8th of an inch thick, making it lightweight and easy to work with during installation.
Because both sides of the panel are covered in foil, you will have a shiny finish. This may not be your ideal look – but it does help improve the insulation properties.
One pack will provide enough insulation for a door 18 feet wide by 7 feet tall. Those are the standard dimensions for a door to a double garage.
It comes in four rolls, each of which is 21.25 inches high and 18 inches wide. (Note that if your door has five panels rather than four, you’ll find it easiest to order an extra roll.)
You’ll also get a roll of double-sided tape to fix it to your garage door. The tape works well, and is designed to stay adhesive in low or high temperatures.
Installation is simple, as long as you don’t have hurricane braces on your door. If you do, you’ll need to remove them one at a time. It will add several hours to your installation period. But if you don’t have braces, you can expect to finish the job in about an hour.
Lightweight and easy to install on most doors
Double layer of aluminum foil resists moisture and mold
Decent acoustic and thermal installation
You may not like the shiny finish
If you’ve got hurricane braces on your garage door, expect installation to take considerably longer.
If you’re still confused about which is the right garage door insulation kit for you, don’t worry! Read on for some questions that will help you narrow down your choice.
How much of a temperature change are you looking to achieve?
The most important thing to consider is how effective you need your insulation to be. If your garage just gets a little stuffy in summer, you’ll need something with modest insulating properties. But if it’s south-facing in a hot climate, you’ll want to invest in more serious insulation.
One way of knowing what you’re getting is by checking out the R value. This indicates how well a material resists the conductive flow of heat. The higher the R value, the greater the insulating properties of the materials.
Watch out for bogus claims, though. We’ve seen cases where retailers have listed different R values from the manufacturer. Always check the manufacturer’s specifications before purchase.
It’s a good idea to read product reviews too. These will often give valuable information on how the insulation has performed in the real world.
What about the finish?
It may not be your top priority, but it’s worth considering how your insulation will look when it’s in place. Bear in mind that it’s going to be covering a large area. Once it’s there, you won’t be able to miss it!
Some insulation is padded, while other kits use flat panels. Do you mind having a reflective finish, or would you prefer it to be white? Do you want to be able to wipe it clean? Or perhaps you’d like to paint over it to match your other garage walls?
There’s a lot of variation out there. Whatever finish you prefer, there’ll be an option to suit.
Think about installation
Finally, think about the installation process. All of the kits on our list are designed to be easy to install – but some are easier than others.
Are you happy to tape panels into place, or would you prefer to slide them into position? How much cleaning up are you prepared to do afterwards? Both polystyrene and fiberglass can create quite a mess when you cut it to size.
And remember to check that your door is suitable for the kit you’re purchasing. Make sure it will include enough insulation. And if you have specific features on your door – an unusual mechanism, or hurricane battens – check that the panels will fit around them.
Let’s get insulating!
That brings us to the end of our review of the seven best garage door insulation kits out there right now. We hope we’ve helped you pick one that will work for your home.
Our top pick is the Matador by Atlas. It’s great at soundproofing and is super-easy to install. Just make sure you keep your vacuum cleaner ready to clear up polystyrene fragments when you cut the panels.
Whichever option you choose, good insulation can hugely increase the livability of your garage. It can be almost like gaining a whole new room in your house.
Happy shopping, and good luck with your insulating project!