The Best Insulation For Garage Door To Keep Heat Out of Your Garage 2019

​Having a space to work on your car (or just store stuff) is great. However, home builders take the view that the door to it is just that – a wide opening to get your car or belongings in easily, rarely do they think about keeping the warmth in or the cold out (and let’s not even start on noise), so usually, it’s just a thin door, either aluminum, fiberglass or plastic and all it does is seal a hole – no insulation or sound proofing at all.

​Even if you’re living in a state where it’s constantly 90 degrees and never rains or gets cool, you could still need insulation to help keep the garage cool. ​There can still be an issue over noise, ​if you’re physically working on a vehicle … angle grinders, drills and general power tools make an awful lot of noise, especially when it’s a bit later in the evening. So you need to insulate that garage door, and these are some of the best garage door insulation kits available right now.

​1. Owens Corning ​Garage Door Insulation Kit

Owens Corning 500824 Garage Door Insulation Kit

​The Owens Corning ​kit has been designed for use on garage doors that are already insulated from manufacture – it fits neatly into the channel that’s left. The fiberglass itself is rated at R-8 insulation level, so when that’s fixed to the door, it will give you between 4 – 6 times better thermal performance and around a 20% reduction is noise, so you’ll be able to go that bit later with your work without complaints from the neighbors.

​Fitting the kit is straightforward enough. Although occasionally you may find that one of the plastic clips doesn’t hold that well – ensure that the surface of the door is cleaned fully before sticking the clip to it – you try using something like rubbing alcohol to remove any residue.

​The only tools you need to fit this kit are a utility knife, tape measure and straight edge​. The manufacturer says fitting takes around an hour, but it’s usually much quicker, ​be sure to read everything properly and don’t just have at it – taking a little extra time to make it look neater will pay off.

2. Matador Garage Door Insulation Kit

Atlas EPS Matador Garage Door Insulation Kit, Designed for 7 Foot Tall Door up to 9 Feet Wide, L

​The Matador kit has a lower R-value than some of the competition, just 4.8 at 75 degrees, but nonetheless, it works well when installed correctly. This kit doesn’t use any stick-on clips or fasteners, and I feel it’s better for it – relying purely on being installed between the door rails makes it look neater and it won’t (can’t) come unstuck.

​Fitting is easy once you’ve measured up​ – you’re cutting the foam tile to be a snug fit in the channel, and then simply bend the tile (it will take an enormous amount of bend to actually break it) into place. The whole door can be done in less than an hour.

​I also like that the whole kit weighs in at just 10 lbs, so there will be no need for adjusting the spring, or putting any further strain on the opener. Although if you’re doing a double sized door (with twice the weight), you may need some adjustment.

​Bright white and easily cleanable – these tiles make for a great insulation to keep the hot and cold out.

​3. NASA TECH White Reflective Foam Core 2 ​Garage Door Insulation

NASA TECH White Reflective Foam Core 2 Car Garage Door Insulation Kit 16FT (WIDE) x 8FT (HIGH) R Value 8.0 Made in USA New and Improved Heavy Duty Double Sided Tape (ALSO FITS 16X7)

​This kit is rated at R-7.5, the R-8 rating is with the existing garage door, and while that doesn’t make a huge difference, it’s worth knowing if you’re after maximum insulation. It doesn’t look as thick as some of the other kits, but the technology incorporated works – it’s a foam core that sits between two layers of a foil barrier, so it’s more about reflecting the heat or cold, rather than straight up insulation.

​For maximum benefit, it’s recommended that you leave a gap between the material itself and the garage door, doing this should result in a 95% reduction of passive heat transference between the door and material, which in turn should allow for a more comfortable experience in the garage itself.

​The kit has been designed for the garage doors with 4 panels (which the makers claim to be around 90% of all garage doors), so it should fit. But you can specify other sizes or dimensions if you have an odd sized door, and as a small bonus, there is a telephone helpline to help you get the right product. It sounds simple, but in this day and age, talking to another human about the product can make a big difference.

​4. Reach Barrier ​Garage Door Insulation Kit

Reach Barrier 3009 Garage Door Insulation Kit

​Simple yet very effective, the Reach kit uses two layers of a ‘bubble barrier’ – think along the lines of bubble wrap, sandwiched between a layer of radiant reflective coating to block around 95% of reflected heat (be that hot or cold).

​The panels are easily cut and fitted, you just need a utility knife and a straight edge. Once cut, you place five of the supplied sticky pads on the door panel and then place the bubble barrier on to the pads – they are ultra-lightweight (no need to adjust the spring or opener) and very pliable. A complete door should take less than thirty minutes in total.

​Typically, you’ll see a 10 degree difference in ambient temperatures between an unprotected garage door and one fitted with the Reach 3009 kit, and better yet, they comply with all building and fire code regulations.

​5. Anco Garage Door Insulation Kit

Garage Door Insulation Kit- DIY---- R-9 Complete Garage Insulation Kit

​Although it’s pretty heavy on the price, the premium kit from Anco has the highest R-value at 9. This means that temperature differentials are pretty vast. On a cold day, you could expect to see 20 -25 degrees difference, but if it’s the heat you’re trying to avoid, you’ll see around 15 – 20 degrees difference.

​What you’re essentially getting is a long fiberglass wool roll – just over 36 ft in length, a bit under two feet in width and 2” thick, backed with a white coating. Due to the material, it’s fully GREENGUARD Children and School Certified, so also adheres to the latest building codes. The kit is big enough for a single door, and is easily fitted in about twenty minutes, but … as it’s made from fiberglass, you should wear long sleeves, gloves and a mask when fitting (unless you like itching).

​This is the highest performing garage door insulation kit, but in all honesty, any of these five kits will make a noticeable difference.

​Energy Friendly

​The final thing to remember is that fitting an efficient garage door insulation will help to lower your energy bills, so it isn’t just about temperature and noise. Spending a few hundred bucks on sorting your garage you could have a dramatic effect on what you spend to heat, cool or light it – simple things like LED garage lights and insulation will soon add up.


​How To Insulate Your Garage Door

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