The Best Garage Door Insulation Kits of 2023

Reduce the heating bill and save money with this affordable Double Bubble Reflective Foil insulation. It has an R-value of 4, and according to the manufacturer, it reflects 97 percent of radiant heat. The insulation comes in a 4-by-10-foot roll that cuts easily to the proper size with a utility knife or scissors.

This garage door insulation kit features two layers of polyethylene air bubbles to help reduce the transmission of heat through the air layer. This is sandwiched between a reflective film of aluminum polyester designed to reflect radiant heat away from the garage door and back into the open garage space. The insulation is lightweight yet durable enough to be installed with tacks, staples, or nails if necessary.

Testing the product was rather tricky. First, this isn't a garage door–specific kit, so we needed to cut the sheet into strips. Even then, we didn't have enough to cover an entire door. We needed to use our own double-sided tape to hang it as well, but because it's so lightweight, it really wasn't an issue. However, we did find that Double Bubble Reflective Foil Insulation did a good job of keeping out unwanted noise, and it measured warmer than the uninsulated door (at least in the areas we were able to install it). The doubled layers were thicker than the other radiant barriers as well.

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