--- title: "I Regret Waiting 3 Years to Make This 1-Hour Upgrade to My Garage" description: "An easy garage door insulation kit reduced energy loss and improved comfort in the workspace—all without upgrading the door." date: "2026-01-21" modified: "2026-01-21" authors: - name: "Kathleen Corlett" job_title: "Editor in Chief" link: "https://www.bobvila.com/authors/kathleen-corlett/" url: "https://www.bobvila.com/reviews/reach-barrier-garage-door-insulation-kit-review/" categories: - "Everyday Essentials" - "Exterior" - "Garages" - "Heating & Cooling" - "Insulation" - "Interior" - "Reviews" tags: - "Commerce" - "SPR" --- # I Regret Waiting 3 Years to Make This 1-Hour Upgrade to My Garage ![Reach Barrier Garage Door Insulation Kit Review]() *Photo: Kathleen Corlett for BobVila.com* Even though I'm now entering the third winter in my 1929 house, this is the first season I've taken a truly deliberate approach to winterization. We've sealed rim joists in the basement (particularly around water pipes that froze last year), blown insulation into attic bays, and started replacing our original—but leaky and broken—top-floor windows. One easy DIY task that I wish I hadn't delayed? Insulating the garage door. Our attached garage sits directly beneath the living space, and over time, it's proven to be a significant source of cold air infiltration. When we replaced our siding last winter, we added a vinyl weatherstripping along the top and sides of the garage door, which helped cut down on the worst drafts. But while the weathered solid wood blocks the wind and precipitation, it still allows heat loss. (And if I were to guess based on other insulation discoveries in the house, the stuff between this level and the living space directly above is several decades old and degrading.) **So, to aid in insulating my garage and the rest of the house, we picked up a [complete kit]() featuring a reflective bubble radiant barrier.** ## Improvement in Under an Hour This kit—previously tested and ranked best overall by the Bob Vila team—lives up to its reputation for ease of installation. With nothing more than a [tape measure]() and [scissors](), the job can be completed in an hour. Measure your door, trim the insulation to size, and secure it using the provided double-sided permanent tape. For me, the most time-consuming part involved triple-checking my measurements and meticulously cutting around door hardware to ensure the cleanest, most precise fit. I found that the included 4-by-2-foot pieces worked well for my 8-foot-square garage door, but our contributing writer Tom Scalisi noted that his 9-foot-wide door was larger than what one kit could cover. Turns out, this is not an uncommon issue with Amazon shoppers, so measure your door(s) before you buy. https://www.youtube.com/shorts/sG8wwXfkVDw ## Lightweight Yet Effective At first glance, these bubble panels resemble shipping materials—but I immediately recognized the material as the same type of barrier that an insulation professional just installed along the stairwell to my walk-up attic. The double-layered, 5/32-inch bubble core is sandwiched between reflective polyethylene, creating a lightweight panel that promises to block 95 percent of radiant heat transfer. The impact was immediate. I noticed sound from the nearby highway dampen with each panel I installed. Plus, the interior surface temperature of the garage door rose from 39 degrees to 54 degrees Fahrenheit—a meaningful improvement for such a simple upgrade. I don't typically heat the garage to work on projects there in the off-season—in fact, I tend to avoid the space in all extreme temperatures and put off working out there except for the briefly comfortable windows March through June and September through November. Thanks to this kit, however, I now feel less resistant to spending January in the space to get it organized for this year's projects. All that's left for me to do is add a [high-quality garage door threshold]() to seal the gap at the bottom. ![Woman holding the box for the Reach Barrier Garage Door Insulation Kit in front of a painted wood garage door]() *Photo: Kathleen Corlett for BobVila.com* ![Woman trimming Reach Barrier garage door insulation panels to size]() *Photo: Kathleen Corlett for BobVila.com* ![Woman sticking up reflective Reach Barrier insulation panels on the interior of a painted wood garage door]() *Photo: Kathleen Corlett for BobVila.com* ## The Bottom Line? If you spend any time in your garage during an off-season—especially if it's attached to your home—insulating the garage door is a smart, low-effort upgrade. This kit is accessible for DIYers of any skill level and installs quickly. Plus, it's lightweight enough to adhere to the door with stickers and to line the door without straining your garage door opener. Older wood garage doors like mine may benefit from the added insulation of this [Reach Barrier Garage Door Insulation Kit](). For the time and cost involved, the comfort payoff is hard to beat. https://www.youtube.com/watch?v=sG8wwXfkVDw ## Author As the editor-in-chief at BobVila.com, Kathleen Corlett is as passionate about crafting quality how-to guides for household projects as she is cleaning, organizing, and building DIY solutions for her own home in New York. She has worked on the BobVila.com team for 10 years; before that, Kathleen previously contributed to Woman's Day, Good Housekeeping, Family Circle, and Cleveland magazines. ### Author social links [LinkedIn]() [Instagram]()