Model # 126760

Internet #202456793

Enerflex 16 in. x 4 ft. Radiant Barrier (50-Box)
0090489198282

Enerflex

16 in. x 4 ft. Radiant Barrier (50-Box)

  • Economical bulk package of easy-to-install panels
  • Blocks solar heat in summer, retains heat in winter
  • 15-year limited warranty
$119.98 /box

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Product Overview

The Enerflex 16 ft. x 4 ft. Radiant Barrier installs easily in your attic to help reduce expensive heat loss in winter and prevent solar heat gain in summer. Designed for use beneath vertical surfaces and the underside of your roof, this pack of 50 covers up to 266 sq. ft. and fits easily between the roof and rafters. No tools are needed for quick installation, so you can start saving on your energy bill right away.

  • For insulating attics along the underside of the roof and vertical surfaces
  • Blocks up to 96% of radiant energy and saves up to 15% on your utility usage
  • 50 pieces per box for 266 total sq. ft. of coverage
  • Reduces heat transfer by thermal radiation across air space between roof and attic floor, keeping attic warmer in winter and up to 30 degrees cooler in warm weather
  • Reduces solar heat gain and helps prevent radiant energy from leaving the home in cold weather to promote energy savings
  • Durably crafted with highly reflective, double-sided, multilayered material
  • Panels easily flex into place between roof rafters of new or existing homes
  • No tools needed for quick installation
  • California title 24 compliant
  • Eco Options approved for energy efficiency
  • Class A/1 fire rating
  • 15-year limited warranty
  • The right insulation can save on energy and heating and cooling bills. Check out our Buying Guide for helpful tips.
  • How much do you need? Let our calculator help:

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Customer Questions & Answers

10 Questions17 Answers

Customer Questions & Answers

16 in. x 4 ft. Radiant Barrier (50-Box)
16 in. x 4 ft. Radiant Barrier (50-Box)

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3 answers

Can I use in the garage?

This question is from 16 in. x 4 ft. Radiant Barrier (50-Box)
Asked by
Alabama
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October 20, 2015
My garage roof is the floor of the up-stairs of my house. Can I use this as an insulation between the garage and the house to improve warmth in the winter in both locations and cool in the summer or is this an attic only insulation?
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Answers (3)

Asked by
Massachusetts
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Home Improvement Profile: Professional
October 19, 2016
Answer: 
Dear Richard: Unfortunately the answer is NO. Reflective barriers are effective under a hot roof in summer, which radiates infrared energy. Cold cannot be 'reflected', so radiant barriers do not work in the winter.
Home Depot sells other insulation products that will be effective for your garage, e.g. foam board and Roxul rock wool. The most effective option is: DOW TUFF-R Model # 268441, Home Depot Read More
Dear Richard: Unfortunately the answer is NO. Reflective barriers are effective under a hot roof in summer, which radiates infrared energy. Cold cannot be 'reflected', so radiant barriers do not work in the winter.
Home Depot sells other insulation products that will be effective for your garage, e.g. foam board and Roxul rock wool. The most effective option is: DOW TUFF-R Model # 268441, Home Depot Internet # 100322376 Store SKU # 163832. Tuff-R provides R-6 per inch of thickness. You can nail or screw the foam board panels to the bottom of your floor joists. Be sure to carefully seal all of the joints and edges to block air leaks. DAP 230 is best for small gaps. The 'Windows and Doors' version of Great Stuff foam works well for larger gaps; the cured foam remains flexible to stop cracks as things expand and contract.
In a garage, however, foam board MUST be covered by a thermal barrier (1/2" drywall) because it is very flammable.
Roxul rock wool is non-flammable with R-4 per inch of thickness. Just like foam board, nail or screw it to the bottom of your floor / ceiling joists. See: Roxul ComfortBoard, Model # RXCB11224, Home Depot Internet # 206789748 Store SKU # 1001748089 If you do not want to install a finished surface on your garage ceiling, e.g. drywall, Roxul also makes a version called Rockboard that is available with a white poly or silver foil facing. You can order it through your Home Depot's Customer Service or Pro Desk. Ask for Roxul Rockboard 60. It installs just like foam board.
If you live in an area with cold winters and want to boost the insulation, fill the joist bays with Roxul Comfortbatt before you install the foam board or Rockboard. ComfortBatt is much denser than fiberglass and provides R-4 per inch. See: Roxul Comfortbatt Model # RXCB351525 Home Depot Internet # 202090820 Store SKU # 974419
I hope this is helpful.

Mark
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Asked by
Havertown, PA
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July 12, 2016
Answer: 
I would use high density fiberglass. It will give you insulation and some fire protection. You need an air space for the radiant barrier to work, and this would use up most of the precious spacing in the roof/floor of the garage/bedroom.
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Asked by
Buford, GA
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March 15, 2016
Answer: 
Richard, The radiant barrier is made to reflect the sun away from your home so using it on a ceiling that has a room above it will not be effective. What you could do is if you are not wanting to pull down the sheetrock and add insulation the right way, then you could try to add rigid board insulation to the ceiling and see if that helped with your daughters room above. I have the same problem in my Read More
Richard, The radiant barrier is made to reflect the sun away from your home so using it on a ceiling that has a room above it will not be effective. What you could do is if you are not wanting to pull down the sheetrock and add insulation the right way, then you could try to add rigid board insulation to the ceiling and see if that helped with your daughters room above. I have the same problem in my house, the house builders just throw the houses up and dont put the proper thickness of insulation for a room over a gargage and who knows why the county inspector doesn't check that! Read Less
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2 answers

can this product be used with vent channels?

This question is from 16 in. x 4 ft. Radiant Barrier (50-Box)
Asked by
Houston TX
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June 19, 2016
I want to know if I can use this with vent channels such as Provent by ADO? If so would it go over or under the channel?
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Asked by
Peabody, MA
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Home Improvement Profile: DIYer
June 21, 2016
Answer: 
It would have to go over the provent channel but I don't think a provent should be used in conjunction with the radiant barrier. An Enerflex panel over the provent would restrict the air flow thru the soffit vents. Check the Enerflex website and Youtube for correct installation.
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June 20, 2016
Answer: 
Yes, the barrier an be used with vent channels.
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2 answers

Can it be used in Windows to keep out hear

This question is from 16 in. x 4 ft. Radiant Barrier (50-Box)
Asked by
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June 15, 2016
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Asked by
Massachusetts
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Home Improvement Profile: Professional
June 30, 2016
Answer: 
Dear Liz: NO! Reflective / radiant barriers are not recommended inside windows because they can overheat and distort the frame, e.g. in vinyl windows, and damage the seals in multi-pane windows.

The best option is to block the heat of the sun before it enters your home. Fortunately, Home Depot sells a number of effective products you can install yourself, e.g. Coolaroo Model # 460051, Home Depot
Read More
Dear Liz: NO! Reflective / radiant barriers are not recommended inside windows because they can overheat and distort the frame, e.g. in vinyl windows, and damage the seals in multi-pane windows.

The best option is to block the heat of the sun before it enters your home. Fortunately, Home Depot sells a number of effective products you can install yourself, e.g. Coolaroo Model # 460051, Home Depot Internet # 203304038 Store SKU # 766454. Search the Home Depot site for "outdoor shades" to see all of the options.

I hope this is helpful.

Mark
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Asked by
California
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Home Improvement Profile: Professional
June 16, 2016
Answer: 
Howdy Liz,
Guessing you meant "heat" and in that case it can keep out alot of heat.
Happy cooling,
Coach Dave
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2 answers

Can this be used in the floor joist's above a crawl space to do the same? Keep the cold from the ground coming through ?

This question is from 16 in. x 4 ft. Radiant Barrier (50-Box)
Asked by
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March 21, 2016
Does it also work in a un-insulated garage in the rafters ?
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Asked by
Boston, MA
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Home Improvement Profile: Professional
May 4, 2016
Answer: 
Dear Twinstates81: Unfortunately the answer is NO. Reflective barriers are effective under a hot metal roof in summer, which radiates infrared energy -- but cold cannot be 'reflected'.
Home Depot sells other insulation products that will be effective for your crawl space, e.g. foam board. The best option is: DOW TUFF-R Model # 268441, Home Depot Internet # 100322376 Store SKU # 163832. You can nail or Read More
Dear Twinstates81: Unfortunately the answer is NO. Reflective barriers are effective under a hot metal roof in summer, which radiates infrared energy -- but cold cannot be 'reflected'.
Home Depot sells other insulation products that will be effective for your crawl space, e.g. foam board. The best option is: DOW TUFF-R Model # 268441, Home Depot Internet # 100322376 Store SKU # 163832. You can nail or screw the foam board panels to the bottom of your floor joists. Be sure to carefully seal all of the joints and edges to block air leaks. The 'Windows and Doors' version of Great Stuff foam works well; the cured foam remains flexible to stop cracks as things expand and contract.
In a garage, however, foam board MUST be covered by a thermal barrier (1/2" drywall) because it is very flammable. A better option is Roxul ComfortBoard, which is non-flammable with R4 / inch insulation value. Just like foam board, nail or screw it to the bottom of your floor / ceiling joists. See: Roxul ComfortBoard, Model # RXCB11224, Home Depot Internet # 206789748 Store SKU # 1001748089
If you want to boost the insulation, e.g. if there is a bedroom above the garage, also fill the joist bays with Roxul Comfortbatt -- which provides R4 per inch. See: Roxul Comfortbatt Model # RXCB351525 Home Depot Internet # 202090820 Store SKU # 974419
I hope this is helpful.
Mark Read Less
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March 23, 2016
Answer: 
Yes, this can be used.
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Customer Reviews

16 in. x 4 ft. Radiant Barrier (50-Box) is rated 4.0 out of 5 by 16.
Rated 4 out of 5 by from Seems to work... The temperature in my attic is noticeably lower +/- 20 degrees. Relatively easy to install but can be a challenge in tight spaces (at the low end of the rafters). It took about 12 hours of work to install about 1000 sqft. (200 pcs). Had a little trouble because the last 10 pcs in the box didn't have the wires (that hold the panels in place) in them.
Date published: 2011-06-13
Rated 5 out of 5 by from This product was easy to install... We just completed installing 800 pieces of this product and it was very easy to install. We have already noticed that our heating system seems to be running less and our house is warmer as a result of this product. We hope that next summer we will experience a good result in reducing the heat in our attic and saving on our electric bill.
Date published: 2012-12-20
Rated 5 out of 5 by from Easy install Though I had to wait for cooler weather to install, we are pleased with the ease of installation, trimming, etc
Date published: 2011-10-04
Rated 3 out of 5 by from Material is harder to put up than it looks Panels have two stiff metal rods that are suppose to hold the panels in place but they are hard to bend into place . Especially in a confined attic
Date published: 2011-09-06
Rated 5 out of 5 by from Easy to Install Enerflex is a very durable reinforced radiant barrier. The two metal rods in each panel hold the panel in place between your rafters. It was very easy to install.
Date published: 2012-02-17
Rated 3 out of 5 by from ok ok for the price inconsistant quality, cheaper material than my first purchase
Date published: 2013-05-14
Rated 3 out of 5 by from Great material, Poor labor working quality The material itself on each sheet seems reasonable nicely of the price, BUT, each piece has different length and width (some 1-2" longer/short than standard indicated as 16"x48") and the layout alignment between the foil sheet not evenly produced.
Date published: 2014-11-11
Rated 4 out of 5 by from Good product I am in the installation process now. It is well packaged and easy to install. I am only about 20% done and I can already notice a significant temperature drop. I am pleased.
Date published: 2016-03-15
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