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Attic Insulation

EcoFoil keeps your attic cool by reflecting heat.

Reflective Attic Insulation

Use radiant barrier for attic insulation in multiple climates. In warm weather, quite a bit of downward heat gain in a home is from radiant heat that penetrates your attic and seeps downward into your home, making your air conditioner run longer to keep your home cool. Likewise, in cold weather, 50-75% of your home or building's heat loss is due to radiant heat up flow as the warmed air inside rushes out of your living space and into the cool air of the attic and outdoors. Fiberglass and cellulose insulation only slow down radiant heat gain or loss instead of stop it. Only EcoFoil.com reflective attic insulation blocks and redirects the heat. Radiant barrier attic insulation stops up to 96% of radiant heat transfer. (Read more about the science of heat transfer).


Item Description Price
Radiant Barrier Insulation - Perforated 500 s.f. image


Radiant Barrier Insulation - Perforated 500 s.f. $69.00 $69.00
Radiant Barrier Insulation - Perforated 1000 s.f. image


Radiant Barrier Insulation - Perforated 1000 s.f. $131.58 $129.00
Attic Stair Insulator - Attic Door Insulated Cover - Draft Cap image


Attic Stair Insulator - Attic Door Insulated Cover - Draft Cap $139.99
1 – 4$139.99
5 – 9$135.00
10 – 19$130.00
20 +$120.00

How does reflective attic insulation stop heat flow?

Model of an attic with radiant barrier insulation installed
The nearly indestructible metalized polyethelyne attic foil insulation from Eco Foil.com is made with 99% pure aluminum. The aluminum in the attic insulation foil works to reflect radiant heat away and back toward the source. Pairing high quality attic radiant barrier insulation with traditional fiberglass or cellulose insulation is the best attic insulation combination to maximize the energy efficiency of your attic space. Reflective attic insulation can also improve the performance for an attic-based HVAC system. For maximum impact from installing attic foil insulation, attic retrofits are the way to go.

What makes EcoFoil attic insulation the right product for your attic insulation?

  • Ecofoil attic insulation is durable and safe - this radiant barrier is the first to pass the ASTM E84-2009 test as a Class 1/Class A flame retardant radiant barrier. People consider EcoFoil the best attic insulation as it is virtually indestructible and impossible to tear, yet this type of attic insulation does not require special clothing or breathing equipment to install and reflective attic insulation leaves no debris behind when you insulate attic ceiling spaces.
  • Radiant barrier attic insulation is an economical addition to your energy savings strategy. Attic insulation foil is easy to install and can be an afternoon DIY project for 1-2 people. Just cut a length of the attic insulation foil with standard scissors, roll the radiant barrier insulation over the face of your attic rafters and staple into place with a manual or pneumatic staple gun.
  • EcoFoil attic foil insulation is the most reflective attic insulation of its kind reflecting 96% of radiant heat when installed with adequate air space on one or both surfaces. What is the best attic insulation? EcoFoil.
  • Attic foil insulation is waterproof and non-absorbent; EcoFoil attic insulation does not enable growth of mold or fungi (ASTM C1338-08) and pinpoint perforations prevent condensation build up in attic spaces.

Attic insulation - "Under Rafter" method

EcoFoil insulation installed under attic rafters

In warm summer months attic temperatures can reach as high as 140° Fahrenheit. The heat from your attic tries to invade your cooled living space, making your air conditioner work harder to keep your house at the desired temperature. Radiant barrier attic insulation installed under the rafters in your attic reflects up to 96% of the sun's radiant heat away from your attic. This method of installing attic insulation keeps your attic temperature lower, requiring less effort from your air conditioner. This attic insulation installation takes a few hours and in hot months you should see an immediate change on your energy bill. Some of the most common cities using reflective attic insulation are Atlanta, Georgia, Houston, Austin and San Antonio, Texas, Florida, and Phoenix, Arizona. Download our installation guide for installing attic radiant barrier- under rafter method.

Attic insulation - "Over Joist" method

EcoFoil insulation installed over ceiling joists in an attic

During cold winter months, 50-75% of your home or building's heat can be lost through your attic area due to radiant heat transfer. Fiberglass and cellulose blow-in insulation in attics only slow down heat transfer and do nothing against radiant heat gain or loss. Fiberglass and cellulose insulations absorb and retain heat, but will eventually transfer the heat to cooler air outside the attic roof insulation. Attic radiant barrier reflects up to 96% of radiant heat back toward the living space, keeping your home warmer and saving you on heating costs. Installing radiant barrier attic insulation is clean, quick, and easy with our EcoFoil Perforated Radiant Barrier product. Just roll the reflective attic foil insulation across the attic floor right over top of any existing insulation and and don't place anything directly on top of it (a minimum 3/4 inch air space is required to reflect heat.) This combination is the best insulation for attic spaces that aren't used for storage to minimize heat transfer. Download our installation guide for installing attic radiant barrier over an attic floor.

Ready to start seeing savings on your energy bills? Make it a do it yourself attic foil insulation project this weekend.

Want to the attic radiant barrier cost? Use our radiant barrier attic insulation cost calculator to see how much EcoFoil you will need for your attic. Simply enter your home's dimensions and select which installation method (or choose both) to see how much EcoFoil reflective attic insulation you will need. EcoFoil ships within one business day, so you can install it and start seeing energy savings in a week or less in the continental U.S..

Attic insulation calculator for insulating attic rafters with radiant barrier

Have questions? Talk to one of our radiant barrier attic insulation experts: (888) 349-3645. Looking for even more savings? Consider radiant foil bubble insulation for your HVAC duct system as well.