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

Double Bubble Insulation - White/Foil - 6' X 125' (750 sq ft)

Double Bubble Insulation - White/Foil - 6' X 125' (750 sq ft)

SKU: EF2520-72-125

Reflects heat and controls condensation in extreme/colder climates

Starting at:

Regular price $299.00
Regular price Sale price $299.00
Sale Sold out

*Plus shipping. Please call 888.349.3645 to place your order.

4' rolls ship FREE! Order online

Product details:

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. Our white/foil variety offers the same benefits as foil/foil, but with a white finish that faces towards your finished space, providing a more "finished" look.

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.  

Why choose a 6' roll?

EcoFoil Double Bubble Foil Insulation performs the same regardless of what size roll is used. A common reason for choosing our 750 sq. ft. roll is if it provides savings in installation cost or time to install. Because this roll is considered "over-sized", it makes it more expensive than our standard 4' roll. As a result, it is often more economical to go with the 500 sq. ft. roll in the same amount of square footage needed for an application. If you need assistance comparing the costs, or for a custom quote, please give us a call at (888) 349-3645 and we would be glad to help walk through this to ensure you get the product that is right for you.

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:

Effective 12/8/22, all 72" will no longer ship via FedEx Ground. All 72" rolls will ship LTL. Please call us at 888.849.3645 or contact us for more information on shipping options.


72 in x 125 ft (750 square feet per roll)

~1/4" thick

Spec Sheets: Download Spec Sheet
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Customer Reviews

Based on 10 reviews
Orlin Volmer
Excellent Product and value.

Installed inside our 26x24 foot steel building located in the sometimes bitterly cold Montana. Used 1X2 firring strips to attach it to. Prior to installing it was virtually impossible to heat the building and when we did heat it, an hour later the condensation would turn to rain. After installation I'm able to heat the building from 20 to 65 degrees within about 25 minutes with our 60K BTU propane heater then maintain it within about 10 degrees with our 18K BTU Big Buddy heater. No doubt it will pay for itself by the end of winter in propane costs.

Hammer Hardesty
Crawl Space Insulation on older home

We used this in conjunction with Dow ridged foam board on concrete block crawl space walls.
The project design makes the crawl space a conditioned space.
We also used an under concrete form of this product this covered it with 3/4” washed stone to complete with system.
The Eco Foil products were well up to the task.
The customer service and wicked fast delivery is Incredible!

Dwayne Everett
Easy install

6 ft wide double bubble. Installation was easy. Taping a little challenging but not bad. Installed over top of wood purlins. Hope it performs well.

Lewis Johnson

Worked out great!

april palacio
Great product great customer service

Great product & price, easy to install, and wonderful customer service

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