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Double Bubble for use in Basement, Metal Building, Crawl Space, Cathedral Ceiling, and Tiny Home/Yurt applications

Double Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)

Double Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)

SKU: EF2220-48-125

Most effective at preventing condensation in colder climates

Regular price $199.00
Regular price Sale price $199.00
Sale Sold out


EcoFoil Double Bubble Foil Insulation is primarily used in pole barnsmetal buildingsbasement wallscrawl spaces, and storage units located in moderate and colder climates. Double bubble insulation combines the heat-shielding properties of solid radiant barrier with two layers of polyethylene bubbles, which acts as a built-in air gap that reduces contact between temperatures on either side of the product. The double layer of bubbles effectively combats the formation of frost and condensation that can occur when temperature differences are extreme on either side of the material. It's very thin (approximately 1/4"), lightweight, and installs easily with minimal equipment. 

A radiant barrier and vapor barrier, all in one product

Not only does Double Bubble Insulation reflect radiant heat, when properly installed with tape it also acts as a vapor barrier, preventing the passage of moisture and other unwanted particles which can cause mold. In order to establish a vapor barrier, you must tape all seams and joints to prevent air passage, keeping moisture and other particles from passing through. 


Radiant barrier vs traditional insulation

Radiant barrier bubble insulation works differently compared to traditional insulation like fiberglass and spray foam.

  • Traditional insulation works to absorb heat and is measured by R-value. The higher the R-value, the thicker the material and the more heat it can absorb. 
  • Radiant barrier bubble insulation, on the other hand, reflects heat back to its source (whether that's your furnace or the sun.)

When used together, these two insulation types can provide a highly effective one-two punch that will keep your building warmer in the winter and cooler in the summer.

R-Value Of Radiant Barriers

Because these two insulation types have different purposes, their effectiveness is measured differently. Rather than rating by R-value, all radiant barrier products are measured by their reflective and emissive properties. When installed properly with an air gap on one side of the product, double bubble insulation will reflect heat away from your building in the summer, and keep heat in during the winter.

There are some companies out there posting big R-Value numbers for their radiant barriers, but those numbers are rating the entirety of the system—including the product, air gap, and other building materials. In reality, most radiant barriers by themselves have little to no R-Value. If you need to satisfy a building code of a specified R-Value, we recommend the use of a traditional insulation in conjunction with our radiant barrier in order to meet code. For more information on R-values, see our How It Works page or contact a member of our friendly service team via chat, by calling (888) 349-3645, or using the form here.  

EcoFoil Double Bubble Foil Insulation is not to be used under concrete slabs. For under concrete slab or radiant floor insulation applications, we recommend EcoFoil Under Slab Insulation.


Ecofoil Double Bubble Reflective Insulation is made from a double layer of polyethylene bubbles, sandwiched between two highly reflective surfaces with a metabolized coating. This product is classified as Class 1/Class A in accordance with the ASTM-E84-09 fire test standard. The product was mounted in accordance to ASTM-E2599-08. It is lightweight, durable, and is easy to handle and install.

Shipping Info:

EcoFoil ships free via FedEx Ground. Products ship same-day on orders received before 4pm CT and typically arrive between 1-4 days. Expedited shipping options available. Call us at 888.849.3645 or contact us for more information on shipping options.


48 in x 125 ft (500 square feet per roll)

~1/4" thick

Spec Sheets:

Download Spec Sheet
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Customer Reviews

Based on 36 reviews
Kobe S

So far so good. Installed on the roof of my 35x36 barn. Well see how it goes this winter and upcoming summer.

randy lawton
drop ceiling in large garage

all went well. have used your products prior. very pleased

John Duncan
So thin I thought it was single bubble

I ordered the double bubble. When it arrived , 1 side of it has flat bubbles. I contacted the company and they said check it again. I actually had to cut a small corner open to double check. Sure enough it is double bubble but 1 side is so thin it looks single. Company said it is just squeezed flat. I unrolled it in the shop for 4 days. It never re-inflated. I had purchased from 2 other places and they were both much better than from here. The others are stiffer and look smoother. The double bubble from here looks wrinkled and ugly compared to the others

Thank you for taking the time to provide us with feedback on this product. Quality of our products is very important to us and we apologize that you are not satisfied with this product. We are constantly reviewing our products and customer reviews helps us to improve our processes. If you have any additional questions regarding your order, please give our team a call at (888) 349-3645 and we will be happy to help you.

Chad Tutor
Great Insulation

Insulated very well and easy to install. We installed this on floor joists and the customer has been very happy with the results.

Brenda F.

Double Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)

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