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Model # 125309

Internet # 202456772

4 ft. x 250 ft. Radiant Barrier Insulation Roll-DISCONTINUED

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$289.00 /roll




Model # 125309

Internet # 202456772

Enerflex, a highly reflective, double-sided, multilayered material, blocks up to 96% of radiant energy and can be installed in new and existing homes. It installs between rafters to the underside of a roof and on other vertical surfaces in an attic to reduce solar heat gain into the home. It also reduces heat transfer by thermal radiation across the air space between the roof and attic floor, keeping an attic up to 30 degrees cooler. In cool weather, Enerflex helps prevent radiant energy from leaving the home and reduces heat loss, which adds up to significant energy cost savings.

  • Save up to 15% on your utility usage
  • California title 24 compliant
  • Class A/1 fire rating
  • Covers 1,000 square feet
  • 15 Year Warranty
  • Made in USA
  • Eco options approved product
  • Insulation calculator button

Info & Guides

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Assembled Depth (in.) 
.065 in 
Assembled Height (in.) 
3000 in 
Assembled Width (in.) 
48 in 
Product Depth (in.) 
.065 in 
Product Height (in.) 
3000 in 
Product Length (ft.) 
250.0 ft 
Product Thickness (in.) 
.065 in 
Product Width (in.) 
48 in 
Friction Fit 
Insulation Type 
Radiant Barrier 
Product Weight (lb.) 
29 lb 
Sheet or Roll 
Warranty / Certifications
ENERGY STAR Certified 
Warranty Information 
15 Year 


Rated 4.3 out of 5 by 9 reviewers.
Rated 5.0 out of 5.0 by Works Great! I installed this directly under some v-crimp tin and what an unbelievable difference. Thats with no air space between them. I can imagine if you use it with air space under the straps. It would work even better and block more heat. Here in southern Louisiana it gets extremely hot and humid. If you ever been here in the summer you would know. I'm gonna use it under the metal roof that I plan on putting on my house and garage and for an extra $600 I will get it back in no time on utilities. Trust me it WORKS! July 17, 2012
Rated 4.0 out of 5.0 by Good Product I could already notice while installing it, the side of the attic with the Enerflex was cooler. It should keep the house cooler on those hot summer days. Installation would be easier if they made it about an inch wider. Getting it lined up on the rafters was a little frustrating. Also, if there were some dotted lines printed on it like they do with Christmas wrapping paper, cutting it straight would be easier. The material was tougher than I expected. I figured it would rip easily like aluminum foil. I can't wait until this winter to see how my heating bill is affected. August 21, 2012
Rated 4.0 out of 5.0 by Blocks heat but keeps in the value Installing this product was fairly easy and it was reasonably priced compared to other similar radiant barriers. While it is possible to install this by yourself, I imagine it would have been even easier if a second person held the sheeting in place while the first person operated the staple gun. I used this underneath a radiant in-floor heating system I recently installed and I immediately noticed the difference in floor temperature. It blocked much of the heat from dissipating into the crawl space. October 23, 2012
Rated 4.0 out of 5.0 by easy to install if rafters are exposed radiant barrier blocks the heat, not an insulation replacement. this product comes with a metal grid inside making it easy to cut straight. stappled to the underdeck of my roof droped the temperature in the attic. easy installs quickly, August 6, 2011
Rated 5.0 out of 5.0 by Unbelievable Results I installed this on the bottoms of the rafters in an older wooden shop building. What a difference! Before we couldn't get the room to heat up no matter how hot a fire we had going in the wood stove. Now it's up to 70 within 30 minutes and that's when it is only 10 outside. Can't wait till summer to see how big a difference it makes when it's a 100 out. Very easy for two people to install. And it looks really cool too! January 24, 2013
Rated 5.0 out of 5.0 by Excellent insulation I used this insulation for my sun room, it works great, I use to have a 100 degree temperature during the summer time inside the room and now that we are experiencing record-high temperatures the thermometer reads 90 degrees. I strongly recommend this product. And if you want more R factor use a little bit of the regular insulation. July 23, 2011
Rated 5.0 out of 5.0 by Very easy to cut to size. No mess. Easy to handle I hung this product by myself in a 24x30x18 high shop. Took me 6 hours to to do all four walls and the ceiling. No messy fiber glass. Just staple, then tape October 29, 2011
Rated 5.0 out of 5.0 by Great product. good price Good product. Easy to use and install. Seems to work well as designed. February 28, 2012
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