Updated August 16, 2019 by Karen Bennett

The 7 Best Foil Insulations

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This wiki has been updated 13 times since it was first published in March of 2017. Good for retaining heat in the winter and keeping it at bay in the summer, foil insulation is commonly applied around attics and basements to help lower energy costs. Our selection features choices suitable for a variety of project sizes and budgets. For safety, always comply with local building codes, and be sure to hire a certified contractor when installing this material near electrical wires. When users buy our independently chosen editorial selections, we may earn commissions to help fund the Wiki. Skip to the best foil insulation on Amazon.

7. RadiantGuard Reflex-Air

6. Reach Barrier DD48025

5. InfraStop Double Bubble

4. Reflectix ST16025

3. Insulation Market Place Shield

2. Reflectix BP48010

1. AES Radiant Barrier

Special Honors

EcoFoil Radiant Barrier Available in a perforated option for attic application, this insulation allows moisture vapor to escape, which helps prevent mold and mildew. It’s also offered in a solid sheet, which is great for use in metal buildings, pole barns, basements, and more. Both versions are heavy duty, double-sided, tear-proof, and designed to reflect up to 96% of radiant heat in both hot and cold climates. ecofoil.com

Editor's Notes

August 12, 2019:

Like spray foam insulation, insulation made from foil can be helpful in reducing heat loss or gain, thereby lowering your energy bill. It can be used alone or to supplement fiberglass, polystyrene, or loose fill insulation. If installed properly, it can reflect up to 97% of radiant heat and shave off one-fourth of your heating and cooling costs, according to estimates.

Joining the list today is the highly-reflective Insulation Market Place Shield, which is made to reflect up to 97% of radiant energy. It’s conveniently is available in seven sizes, so you’re sure to find the right one for your project. This mold-resistant choice is impervious to humidity and moisture, and it’s built with sheets of aluminum that contain a durable layer of polyethylene foam. It’s easy to cut with a pair of scissors, and you can buy it with confidence, thanks to a generous 10-year warranty.

Another choice you can’t go wrong with is the commercial-grade AES Radiant Barrier, which also will stand the test of time, thanks to its virtually impossible-to-tear build. You get 1,000 square feet per roll, and it cuts easily with a utility knife or scissors. It’s designed to be impervious to the effects of humidity and climate changes, making it a low-maintenance fixture in your home. Like all the selections on our list, it’s compliant with the American Society for Testing and Materials Class 1 Class A requirements.

No matter which product you ultimately choose, for safety’s sake, be sure to comply with your local building codes when installing any foil insulation. If you intend to place it around electrical wires, hire a licensed, professional insulation installer for the job. Stapling into live wiring can be fatal. Always make sure work areas are properly ventilated and well-lit.

Karen Bennett
Last updated on August 16, 2019 by Karen Bennett

Karen Bennett lives in Chicago with her family, and when she’s not writing, she can usually be found practicing yoga or cheering on her kids at soccer games. She holds a master’s.degree in journalism and a bachelor’s in English, and her writing has been published in various local newspapers, as well as “The Cheat Sheet,” “Illinois Legal Times,” and “USA Today.” She has also written search engine news page headlines and worked as a product manager for a digital marketing company. Her expertise is in literature, nonfiction, textbooks, home products, kids' games and toys, hardware, teaching accessories, and art materials.

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