Double Bubble Reflective Insulation (White/Foil) 4'x75' - 300 sq ft

EcoFoil Double Bubble Foil Insulation is primarily used in pole barns, metal buildings, basement walls, crawl 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 94% of radiant heat transfer, 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.

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 a reflective metalized surface on one side, and a clean white finish on the other. 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.

This product carries a manufacturer's limited warranty. Fi-Foil Company warrants that its reflective bubble insulation (RBI) and RetroShield System will be free from defect in materials and workmanship resulting in delamination or decomposition, for the lifetime of the product, provided that the product is installed according to the manufacturer’s specifications and has been used in an approved application. View Manufacturer Warranty

This product ships FREE via FedEx Ground. Products ship same-day on orders received before 4pm CT and are typically delivered within 2-5 days. Expedited shipping options available. Call us at 888.349.3645 or contact us for more information on shipping options.

48 in x 75 ft (300 square feet per roll)

~1/4" thick