0716511400030

Reflectix

Model RB4812550

Internet #203927012

Store SKU #223310

48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier

$65.84 /each
  • Great for energy efficiency
  • Works well in attics
  • 48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier

Frequently Bought Together

Product Overview

Lower your energy bills with Reflectix radiant barrier. A perfect solution for attic insulation, it blocks 94% or more of the radiant heat that normally would be transferred to your attic floor. That keeps the attic cooler and means less air conditioning usage, up to 10% less, for lower utility bills. Attic-mounted duct systems also benefit dramatically from our Reflectix radiant barrier. It is easy to handle, and can be used in cathedral ceilings or as a house wrap behind brick or siding.

  • Product has a class A / class 1 building material fire rating
  • New, heavy duty (polyester woven fabric), radiant barrier energy saving product
  • Convenient 500 sq. ft. size rolls
  • Easy to handle and install
  • Blocks 94%+ of radiant energy from entering your home
  • Dramatically reduces attic surface temperatures resulting in a cooler home
  • Tools required include a utility knife, staple gun, safety glasses and a tape measure
  • No mess and no itchy fibers
  • How much do you need? Let our calculator help:

    Info & Guides

    You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Specifications

Dimensions

Details

Warranty / Certifications

More Products With These Features

Search

Customer Questions & Answers

12 Questions30 Answers

Customer Questions & Answers

48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier
48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier

Ask your questions. Share your answers.

 
 
Clear Search Term
 
 
Sort By:
 
5 answers

I currently have fiberglass insullation for my garage door. If this were mounted behind the fiberglass, against the garage door, would it improve it?

This question is from 48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier
Asked by
Dallas, Texas
Read all my Q&A
June 6, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (5)

Asked by
east Ttennessee
Read all my Q&A
July 19, 2016
Answer: 
It probably wouldn't add any benefit, other than keeping the insulation paper from ripping if you put it on the inward side. Then if you use a space heater in the garage, it would reflect heat back inward.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
July 19, 2016
Answer: 
Dear Tom: No. All radiant barriers require a sealed air gap on one side. This air gap provides almost all of the insulation R value. The shiny plastic has almost no R value.

So if you simply attach or sandwich the reflective barrier between the fiberglass and the garage door, it will make very little difference.

I hope this is helpful.

Mark
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Arizona/Oregon
Read all my Q&A
Home Improvement Profile: DIYer
June 8, 2016
Answer: 
I live in Az part of the year where the sun can be very overpowering to say the least. The house I bought received direct sunlight on the garage door making the garage unbearably hot. I had used fiberglass panels in other homes in the past and was quite pleased. This is the first house that I used the radiant barrier as a first step. I felt it made a significant difference in stopping the radiant heat Read More
I live in Az part of the year where the sun can be very overpowering to say the least. The house I bought received direct sunlight on the garage door making the garage unbearably hot. I had used fiberglass panels in other homes in the past and was quite pleased. This is the first house that I used the radiant barrier as a first step. I felt it made a significant difference in stopping the radiant heat from getting thru to the insulation. I haven't done significant temperature tests but I am convinced for the added cost it was worth it in my situation. The amount that you are buying with this roll will be way more than you need. It would be nice if the barrier was available in smaller quantities. At this point I have several feet left and if I hadn't just insulated my attic with blown in insulation making access throughout the attic very difficult I would be putting it against the rafters as well. Read Less
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0

Asked by
Texas
Read all my Q&A
Home Improvement Profile: Professional
June 7, 2016
Answer: 
No. Your best bet is solid foam sheets, preferably 3/4 or one inch thick. Radiant barrier not really effective with metal.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

June 7, 2016
Answer: 
If you sandwich the radiant barrier between the garage door and the fiber glass you would get minimal performance. Reflectix products are made to be installed with air space on at least one side. The reflectivity on the side with the air space can be up to 96%.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
 
4 answers

can i use this under a foam insulated metal roof

This question is from 48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier
Asked by
kona Hi
Read all my Q&A
July 18, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (4)

July 20, 2016
Answer: 
You can install the radiant barrier under the foam insulated roof if you leave it exposed. If you cover it the performance will be minimal.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
July 20, 2016
Answer: 
Dear Arch: NO. Select a non-perforated version of Reflectix or other radiant barrier product. Perforation eliminates the ability to create a sealed air pocket on one side, which is essential for under-roof applications. This air gap provides almost all of the insulation R value, because the thin plastic in the radiant barrier has almost no R value. The perforated version allows air to pass through the Read More
Dear Arch: NO. Select a non-perforated version of Reflectix or other radiant barrier product. Perforation eliminates the ability to create a sealed air pocket on one side, which is essential for under-roof applications. This air gap provides almost all of the insulation R value, because the thin plastic in the radiant barrier has almost no R value. The perforated version allows air to pass through the radiant barrier, defeating the purpose for this application.

With a non-perforated radiant barrier, there are a couple of caveats:

(1) As noted above, you must create a sealed or externally vented air gap between the roof and the radiant barrier. Otherwise, the reflected heat will simply warm the inner surface of the roof and the surrounding air even more, which will flow into your building as it did before -- for no net benefit. If you have a flat unvented metal roof, a sealed air gap is best. Use foil HVAC tape to join panels and seal the edges. DAP 230 sealant is also helpful.

(2) Radiant barriers are not effective in the winter because cold cannot be 'reflected' and the warm air inside your building is not radiant. So if you need to heat your building in the winter, additional standard insulation would be more effective. Spray foam or foam board is most effective with R5 per inch, but it is very flammable and must be covered by drywall. If this is not an option, Roxul ComfortBoard is best -- R4 per inch and fire resistant. A version with foil facing is also available by special order from your Home Depot Pro or Customer Service Desk; ask for Roxul Rockboard 60 with foil facing. This provides a finished surface with a better appearance that is easy to clean.

I hope this is helpful,

Mark
Read Less
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Arizona
Read all my Q&A
Home Improvement Profile: DIYer
July 20, 2016
Answer: 
I don't think this is within the manufacturers suggested uses and this is my opinion only. It should work if you can lay the material without causing slipping hazard and you can lay it without ripping it or destroying it while installing the metal roof. That application may be to cumbersome but could be worth a try. As far as being effective under the roof my vote is yes.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
east Ttennessee
Read all my Q&A
July 20, 2016
Answer: 
It works best if there's an air space between the foil and the foam insulation. I'd use furring strips or small molding strips to provide that air space. Conversely the package instructions say you can cut it and staple directly to the wood between rafters, so maybe it would be effective on foam as well. Best bet, call Reflectix at 800-879-3645 or 765-533-4332 and get a definite answer.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
 
3 answers

Will this product prevent condensation in metal buildings?

This question is from 48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier
Asked by
Read all my Q&A
April 19, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (3)

Asked by
Arizona
Read all my Q&A
Home Improvement Profile: DIYer
July 20, 2016
Answer: 
No, the barrier is perforated and will let moisture escape.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

April 20, 2016
Answer: 
No, this product will not prevent condensation in metal.
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0

April 20, 2016
Answer: 
Reflectix radiant barrier, SKU# RB4812550, will not help prevent condensation in a metal building.
+2points
2out of 2found this answer helpful.
Was this helpful?helpful2unhelpful0
 
3 answers

Does Reflectix perforated film 'Radiant Barrier' have a higher R value for attic use than their 'Double Reflective' insulation?

This question is from 48 in. x 125 ft. Heavy-Duty Perforated Radiant Barrier
Asked by
austin texas
Read all my Q&A
April 17, 2016
Simple question remains: Is Reflectix perforated Radiant Barrier superior to its other product of 'Double Reflective" insulation? Both are for/work in attic----but which one of these two simple products has a higher R-value [insulative value]? [note that Reflectix OWN website does not answer this simple question...which one of these two products is superior for Attic insulation purposes. [The perforated Radiant Barrier [thin film] is MUCH cheaper than the Double Reflective insulation, but which one creates the highest energy savings?
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (3)

Asked by
east Ttennessee
Read all my Q&A
Home Improvement Profile: DIYer
July 20, 2016
Answer: 
It wouldn't make any difference. Neither product has an R-Value rating when installed in an attic. It reflects heat away from the surface. It doesn't insulate.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
July 19, 2016
Answer: 
Dear Paul: As the Reflectix rep noted, the shiny bubble wrap or plastic has almost zero R value and there is very little difference between the film and bubble wrap versions. A few key points:

(1) If you have a standard ventilated attic, a reflective barrier can reduce the heat flux from the hot roof in summer to the ceiling below by ~28%, reducing HVAC costs by 2 to 4% according to an independent
Read More
Dear Paul: As the Reflectix rep noted, the shiny bubble wrap or plastic has almost zero R value and there is very little difference between the film and bubble wrap versions. A few key points:

(1) If you have a standard ventilated attic, a reflective barrier can reduce the heat flux from the hot roof in summer to the ceiling below by ~28%, reducing HVAC costs by 2 to 4% according to an independent real world test. You could install standard radiant barrier film on top of insulation batts in your attic, or staple it to the bottom of the rafters.

(2) Radiant barriers do not work in winter, however, because cold cannot be 'reflected' and warm air inside your home is not radiant. So if you need to heat your home in winter, standard insulation is a better option, e.g. foam board (available with a built-in radiant barrier) or rock wool. Foam board offer R5 per inch, but is very flammable and MUST be covered by 1/2" drywall if you attic is accessible and used for storage. Rock wool provided R4 per inch, is much denser than fiberglass, and is fire resistant. Home Depot carries Roxul ComfortBatt and ComfortBoard, which are made from rock wool. ComfortBoard installs just like foam board.

I hope this is helpful,

Mark
Read Less
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0

April 19, 2016
Answer: 
Neither product has an R-value when used in the attic application. Both products will reflect 94% or more of the radiant heat. So you can use the radiant barrier instead of the bubble product and get the same performance.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
2 »
  • 2016-08-25 T12:46:43.958-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestionsanswers
  • loc_en_US, sid_203927012, prod, sort_default
2 »
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 133ms
  • QUESTIONS, PRODUCT

Customer Reviews

Rated 4.4 out of 5 by 18 reviewers.
Rated 4.0 out of 5.0 by Strong material, but needs better quality control Purchased two rolls, both had quality issues where they were wrinkled. Fortunately after stapling it flattened a bit. August 16, 2016
Rated 4.0 out of 5.0 by Reduced Attic Temps I purchased this material to reduce the temperature of the attic storage space above my garage. We are in the Pacific Northwest where this sort of barrier is not commonly used. I stapled it to the underside of the rafters. After covering the underside of just one roof plane, facing southwest, I've noticed a measurable reduction in temperature. Before this product, The high attic temps were about 14 degrees higher than the highs outside , sometimes as much as 19 degrees. After installation under just one side of the attic roof, the attic high temps are averaging only 7 degrees above the outdoor temps. What I find more surprising is that the initial temperatures were measured in May and June, with an average high outside of 78, with a maximum of 101. The temperatures with the material installed were measured in August, with an average of 95. Furthermore, the garage attic space is open on one side to the rest of the house attic, including a large south-facing roof plane. I assumed the heat gain from the rest of the space would equalize with the space above the garage, making the barrier ineffective, but the numbers seem to prove otherwise. This product seems quite effective, and was cost effective at about $65 a roll. Installation was straight forward with a staple gun and utility knife, but is definitely a two person job. The large pieces can be unwieldy, particularly in tight spots under the attic roof. August 16, 2016
Rated 4.0 out of 5.0 by Noticable diffrence I installed this insulation on my roof under metal panels and my attic has reduced in temperature by atleast a few degrees. Was very easy to install and very duable. August 9, 2016
Rated 5.0 out of 5.0 by Very strong & easy to work with The title says it all. I really like this product. It's inexpensive for the quality, and I can attest that it's a lot better than some other competing brands (based on their reviewers' comments). I'm quite happy I bought this. It's very easy to make holes for receptacles and switches, and the cut-out area doesn't rip beyond where you wanted it. As an added bonus, I didn't have any help and was able to put this up onto ceiling rafters fairly easily. I would recommend getting help though. Two people make it twice as easy and probably twice as fast. I can't really attest to how well it performs because I just put it in. It seems to be helping but haven't made any analysis. Scientific lab results are good enough for me. I'm not going to second-guess professional testers. If radiant foil does what it' supposed to do, I'd guess this does it better than average. It's very shiny on both sides and can be made taut along the rafters where I put mine. If I have any criticism it would be that I'd like the rolls to be 48.5 inches wide instead of 4 feet. It wouldn't hurt anything to overlap an extra half-inch. But it's a real pain when careless construction puts the studs so far apart that you only have an eighth of an inch to staple into. With 16-inch spacing, 4 studs should be 48 inches center to center but often they aren't. I have 120 sq ft left of the roll. I also have faced insulation that goes into the roof peak of my storage shed. That peak area needs the paper covered for fire safety. It's a real waste of money to put plywood or paneling up there, to say nothing of how hard it is to cut all those angles. Covering that Kraft paper with foil easily gives a super-tough surface that matches the ceiling and basically costs nothing. I know it has no insulation or radiant benefit installed that way. One caveat (if used as a wall covering) if you get direct sunlight on it at some hours of the day, spray paint it to prevent eye damage. July 19, 2016
Rated 5.0 out of 5.0 by Way better than the stuff I bought on ebay I purchased a roll off of ebay and needed more to finish the attic, so I went to Home Depot and purchased this roll. The difference was remarkable! when they say HEAVY DUTY they mean it, the ebay roll was very thin I would guess half as thin as this one. I should have used this product from the beginning. March 10, 2016
Rated 4.0 out of 5.0 by Installed under siding Easy to install. I'm hoping this will do something for me in the Florida heat, something is better than nothing right? February 10, 2015
Rated 4.0 out of 5.0 by Garage door radiant barrier, Anyone else think of this?? I read about this product for use in attics etc. In all of my houses I have always installed garage door insulation available in kits from Home Depot. I purchase the regular garage door insulation kit from the Depot and ordered the radiant barrier from the Depot for delivery as the store did not have it in stock. I used a can of spray adhesive to attach the radiant barrier to the insulating panels. You could tell the difference immediately. I know the insulation works well but the addition of the radiant barrier should help as well. January 1, 2014
Rated 2.0 out of 5.0 by CHECK IT FOR DEFECTS!! I bought 6 of these rolls. 5 were ok, the 6th had MAJOR defects. Unfortunately I had no choice but to us it as I couldn't wait a week to do siding. I'll post a picture of the defective stuff. The plastic matrix was great - the reflectivity was only half applied - a typical mfr defect for this type of stuff. Great stuff, nice, strong, easy to use - but buyer beware!!! July 29, 2014
  • 2016-08-25 T14:14:30.900-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_18, tr_18
  • loc_en_US, sid_203927012, prod, sort_default
2 >>
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 71ms
  • REVIEWS, PRODUCT