The 6 Best Garage Door Insulation Kits for Temperature Control

Reduce heat loss or gain with a garage door insulation kit that suits your door and budget.

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The 6 Best Garage Door Insulation Kits For Temperature ControlVIA MERCHANT

Your home’s garage door is its weakest link regarding energy efficiency. As outdoor temperatures fluctuate, the thin metal, composite or fiberglass material combined with multiple air gaps does little to avoid transferring heat and cold. While sealing the air gaps helps, the best garage door insulation kits increase the insulating value of the door.

Garage door insulation is crucial for reducing heat loss or gain in your garage if you plan to install a garage air conditioner or heater. Even the best garage heater will struggle to keep up with the demand for warmth without effective garage door insulation.

However, knowing which garage door insulation kit is right for your home and situation can be challenging. The size of your garage door, whether single or double, is the first thing to know. Beyond that, choosing the style and material you need can be anyone’s guess. We’ve evaluated the top contenders and compiled this list of the best garage door insulation kits to help you decide which could work best for your home.

The Best Garage Door Insulation Kits

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Reach Barrier Reflective Air Garage Door Insulation Kit
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Best Overall Garage Door Insulation Kit

Reach Barrier Reflective Air Garage Door Insulation Kit

The best garage door insulation kit for your home is the one that fits your needs regardless of what might be best for your neighbors. However, one kit that meets many homeowners’ needs is the Reach Barrier garage door insulation kit. It’s a budget-friendly reflective insulation solution consisting of eight 24-inch-by-48-inch panels of trimmable, 20% recycled material. The kit includes self-adhesive fasteners for simple installation, and the materials won’t require protective clothing to install.

While the product doesn’t state its insulating ability or R-value (rating of a material’s ability to resist heat transfer), its high average consumer ratings attest to the fact that it’s effective against heat and cold transfer. The product works best for single garage doors of 8 feet wide or less, or double garage doors 16 or fewer feet wide with the purchase of two kits.


  • Deflects heat in summer and retains heat in winter
  • Long-lasting adhesive
  • Easy installation (no special tools necessary and panels are pre-cut)
  • Budget-friendly price
  • Made from 20% recycled material


  • R-value not stated

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Us Energy Nasa Tech 2 Car Garage Door Reflective Insulation Kit
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Best Value Garage Door Insulation Kit

US Energy NASATech Garage Door Reflective Insulation Kit

A major deciding factor when searching for energy-efficient solutions is ensuring you get the most value for your money. One such product that meets that need is the US Energy NASATech garage door insulation kit. It provides an impressive R-value of eight, which means roughly 90% of heat flow is blocked, while offering everything you need for installation at a reasonable price.

Four trimmable rolls come in the kit, making it compatible with multiple, double garage door sizes up to 18 feet wide. Heavy-duty, double-sided foam tape, as well as instructions, a squeegee for door preparation and a utility razor knife are included, so all you’ll really need is a few hours available for installation.


  • Kit includes everything necessary for installation
  • Reasonably priced
  • R-value of eight
  • Comes in rolls instead of panels for versatility
  • Fits doors up to 18 feet wide


  • Rolls may be more difficult to handle than pre-cut panels

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Cellofoam Garage Door Insulation Kit
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Best Budget Garage Door Insulation Kit

Cellofoam Garage Door Insulation Kit

Saving money is one of the primary reasons to pursue energy efficiency, whether in the home or garage. To that end, thus budget-friendly garage door insulation kit from Cellofoam can save you money right from the start. The kit consists of eight moisture-resistant and durable, expanded polystyrene foam (EPS) panels, which are trimmable to fit individual sections of garage doors up to 9 feet wide (or 18 feet wide with a pair of kits).

The R-value for this kit is just over four, and the product is washable after installation to keep it looking good. However, the panels are just 20 inches tall, meaning the kit will only fit 7-foot tall garage doors.


  • Won’t break the bank
  • Fits single garage doors up to 9 feet wide
  • EPS material is durable and moisture-resistant
  • Installed product is washable


  • Won’t fit garage doors taller than 7 feet

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Owens Corning Garage Door Fiberglass Insulation Kit
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Best Garage Door Insulation Kit for Easy Installation

Owens Corning Garage Door Fiberglass Insulation Kit

Installing garage door insulation is just one part of how to heat a garage when temperatures drop, and it doesn’t have to take all weekend. This garage door insulation kit from Owens Corning claims installation takes just an hour, and several reviews mention the kit was not only easy to install, but took less time than stated. Additionally, as a fiberglass insulation, the fibers fill gaps nicely at the edge of the door panels.

Installation involves adhering one-half of the retaining clips to the door and securing the pre-cut, trimmable panels with the other half of the the clips. The kit provides an R-value of up to eight, and is designed for single garage doors with channels to hold the insulation panels in place at the edges.


  • Installation takes under an hour
  • R-value of eight
  • Fiberglass insulation fills gaps at panel edges
  • Includes protective gloves, adhesive and clips


  • Only for use on garage doors with channels
  • Fiberglass insulation requires protective clothing for installation

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Matador Garage Door Insulation Kit
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Best Looking Garage Door Insulation Kit

Matador Garage Door Insulation Kit

Since we often focus on function over aesthetics, the backside of a garage door isn’t typically classified as “pretty.” However, the Matador garage door insulation kit adds visual improvement while providing up to a 4.8 R-value to your door. Available in two sizes, the large one is for 7-foot doors while the extra-large version is tall enough for 8-foot tall doors.

The kit consists of eight EPS, trimmable panels for a single garage door up to 9 feet wide. Installation simply involves cutting the panels to fit and bending them slightly for insertion into the channels at the edges of each door section. Proper installation yields a clean appearance that looks like it came that way from the factory.


  • Final appearance mimics factory installation
  • Comes in two sizes
  • R-value of 4.8 (good for thin insulation)
  • Friction fitting requires no special adhesives or tools


  • Garage door requires channels for proper fit
  • Panel cutting must be precise

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Kraken Bond Fastcoat Spray Foam Insulation
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Best Splurge Garage Door Insulation

Kraken Bond FastCoat Spray Foam Insulation Kit

There are some concerns about applying spray foam insulation to the inside of a garage door: The potential for product degradation over time, as well as questionable adhesion to some surfaces. However, if you’re seeking a high R-value of up to seven per inch of thickness and have some spare change in your pocket, Kraken Bond FastCoat spray could be just what your garage needs.

Kraken offers a variety of spray foam insulation and accessories. This kit includes 12 cans of spray foam, a spray gun attachment and gun cleaner for wrapping up the job, as well as safety goggles and gloves. The 12 cans cover up to 240 board feet at 1-inch thick, which should be more than enough for a full-size, two-car garage door. Installing spray foam insulation is usually a job for professionals. However, with patience, prep work and plastic sheeting on the garage floor, it’s a doable DIY garage project.


  • Includes reusable spray-foam application gun, foam cleaner, safety goggles and gloves
  • Installation requires no measuring or cutting
  • Provides enough foam for a two-car garage
  • R-value of seven


  • Prep work is necessary for good results
  • Product may degrade over time

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What to Look for When Buying a Garage Door Insulation Kit

The best garage door insulation kit for your home depends on a number of variables, including the climate in your location, what you’re trying to achieve through the project and what type of garage door you have. Garage door insulation kits are available in several configurations, materials and insulating qualities and abilities, but the most crucial factors can be boiled down into just a few key points. Consider the following factors to help decide which is best for your situation.

  • Cost: The whole idea behind insulating your garage door is to make your garage more comfortable while saving money on energy bills. It only makes sense that the insulation kit you purchase fits in your budget.
  • Value: A good garage door insulation kit with proper installation can pay for itself rapidly through energy efficiency. If you’re not seeking the absolute lowest price tag for the project, ensure you receive a good value in the form of a return on investment. Paying slightly more to gain a higher R-value (while not breaking the bank) is likely a better investment than spending less now and paying more for heating or cooling later.
  • Door size: Garage door insulation kits come in various sizes. Some are available as single or double door kits while others may only fit 7-foot tall doors or 16-foot wide doors. Be sure to check the kit’s size before purchasing one or more of them for your garage door. Also, make sure the kit is compatible with the style and material of your garage door.
  • Installation: If you’re planning on insulating your garage door as a DIY project, be certain that the kit you choose fits your door style and that its installation is within your skill level. Remember that some products may be both easy to install and a good value while others may be difficult to install and provide little in the way of insulating qualities.

How We Found the Best Garage Door Insulation Kits

I have over 30 years of professional home improvement and repair experience in the field. I analyzed numerous manufacturers and products, and rated them based on performance, features, reviews and stand-out qualities. That lead me to the six best garage door insulation kits that are worthy of your hard-earned dollars.


What is the best thing to insulate a garage door?

The best thing to insulate your garage door may be different from what’s best for someone else’s door. It depends on the climate in your area and how much insulating ability you desire.

Do garage door insulation kits make a difference?

A properly installed garage door installation kit can mean a difference of 20 to 40 degrees Fahrenheit variation between the inside of the garage and the outside elements. However, the garage insulation must be in good condition, and the door must have an intact seal to be effective. The kit makes a difference in the right situations, and can even be the difference between a garage heater being worth it or not.

Does Styrofoam garage door insulation work?

Styrofoam is, in reality, a trademarked name for a product manufactured by DuPont. Most often, what’s called Styrofoam is really expanded polystyrene (EPS). EPS is excellent for use as garage door insulation, due to its relatively high insulating value and reasonable cost.

Deane Biermeier
After over 30 years working in residential construction, contracting, remodeling, maintenance, and home repair Deane began writing to broaden his reach. Throughout his career, his passion has been helping clients find the potential hidden in the walls of every home and providing them with the information and tools to take control of their repair and remodeling pursuits. His goal was, and is, to assist his clients—now his readers—in finding ways to make their ambitions a reality. To meet that desire, Deane now provides written content about all things relating to the home and home finances.