attic foil

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    InsulationStop's Attic Radiant Barrier Foil

    Attics are the primary source of heat transfer in a home. The overhead sun constantly emits radiant heat that hits the roof and is absorbed into the attic. As the attic temperatures rise, more radiant heat is absorbed and transferred by the ceiling above down to you and into your living space.

    You can stop this transfer of radiant heat however. Aluminum is one of the most highly reflective materials on Earth. Radiant barriers are highly reflective sheets of aluminum foil woven to a mesh or scrim for thickness, strength, and durability. Installed correctly, and they can lower your attic temperature up to 30 degrees.

    At, we supply the BEST radiant barrier on the market at the LOWEST price. Our attic radiant barrier is Energy Star Approved and at a 5 mil Thickness and over 28 lbs. Weight (per 1000 sq ft), it is the strongest in the industry.

    Attic Installation Methods

    Attic Radiant Barrier Foil Insulation Roof InstallationAttic Radiant Barrier Foil Insulation Tall Attic Installation
    Attic Radiant Barrier Foil Insulation Floor InstallationAttic Radiant Barrier Foil Insulation Attic Floor Over Existing Insulation

    Measuring How Much Radiant Barrier Insulation You Need


    If you are planning on installing the radiant barrier on the attic floor you only need to measure for the square footage you intend to insulate. If you are stapling the insulation to the rafters you need to account for the pitch of the roof. First measure your attic square footage. Then determine the pitch or slope of your roof. Use table to find your Pitch Factor. Multiply the Square Footage x Your Pitch Factor = Square Footage of Radiant Barrier Required. Don’t forget to include any gable or other end walls. They will need to be insulated as well.

    Attic Radiant Barrier Foil Insulation Pitch Factor


    Discounts Taken at Checkout Page
    Square FeetDiscount
    500-1500Everyday Low Price
    2000-5000$5.00 off per roll
    5000-9000$10 off per roll
    Above 10,000Call for pricing
    *Discounts for Radiant Barrier Products Only

    Our Attic Radiant Barrier ships fast via UPS. Your order will ship within 24-48 hours, some times the same day. Attic Radiant Barrier ships in a protective box ensuring it arrives in great condition. For discounts on multiple rolls purchased, they price will automatically be reflected in the shopping cart.

    Attic Radiant Barrier Foil Insulation Purchase Radiant Barrier

    InsulationStop's Attic Radiant Barrier Foil Specifications

    Attic Radiant Barrier Foil Insulation 28lbs
    Attic Radiant Barrier Foil Insulation Energy Star


    • Standard Size: 16", 24" and 48" wide by 125 or 250 ft long
    • Double Sided Radiant Barrier
    • ENERGY STAR® Qualified
    • Contains metalized film with polyethylene reinforcement
    • Emissivity: 0.05 (ASTM C1371-04a)
    • Reflectivity: 95% (ASTM C1371-04a)
    • Class A / Class 1 Fire Rating (ASTM E04-10)
    • Flame Spread: 0 (ASTM 084-10)
    • Smoke Development: 5 (ASTM E84-10)
    • Clean and Non-Tonic
    • Corrosivity: 100% Humidity, PASS (ASTM D3310-00)
    • Mold and Mildew: No Growth (ASTM C1338)
    • Water Vapor Permeability: 6.3 perms (ASTM E96-05)
    • Thickness: 5 mil
    • Weight: 29.95 lbs / 1000sf roll
    • Shear/Tear Strength (Length): 13,23 lb of force (ASTM 02261)
    • Shear/Tear Strength (Width): 13.98 lb of force (ASTM 02261)

    Code Approvals

    • Meets EPA standards for sheet radiant barriers
    • Meets California Insulation Standards

    2 Radiant Barrier New Construction Applications

    As long as Radiant Barriers have an airspace on at least one side they are extremely effective at blocking radiant heat. These two applications are for new construction applications where the radiant barrier will be installed as the roof is installed (left) or when a batten style roof is used for various roofing materials (right). On both applications a suitable airspace is achieved for the radiant barrier to have maximum effectiveness.

    Here are 2 more roofing applications for our Attic Radiant Barrier Foil.

    Attic Radiant Barrier Foil Insulation New Construction

    Some Notes on Ventilation & Air Sealing

    Ventilation/Air Sealing

    An often overlooked area is attic ventilation. This is a very important component to a healthy, efficient attic. This section deals with the different types of attic ventilation and some key concepts to help you better understand how your particular attic ventilates itself so you can save even more on your energy costs, prolong the life of your structure, and live more comfortably.

    The two major reasons for attic ventilation is temperature and moisture control. Controlling temperature in the hot months results in lower cooling costs. This is why our attic radiant barriers are effective. They lower the temperature in your attic. This allows less radiant heat into your home. Attic ventilation is just as important. You can also lower your attic temperature by having the correct ventilation. The other reason for attic ventilation is the control of moisture. Moisture that is produced in the home may travel into the attic. This is most prevalent in kitchens and bathrooms. If this moisture can not escape the attic it can condense. This is what causes wood rot, mold growth, and insulation to deteriorate.

    The two ways to accomplish attic ventilation is by natural ventilation methods or by power ventilation. First let’s discuss natural ventilation. This is the most common method for most homes built within the last forty years. It’s also the most energy-efficient because it works on proven principles. As air becomes warmer it becomes less dense and rises. Also, wind movement around a home creates areas of different pressure. This is how the common ridge and soffit vent system works. If a spaces air inlets or soffits are lower than the air outlets, natural ventilation will occur. The larger the distance between the soffits and ridge vent or inlets and outlets are, the greater the rate of ventilation will be. This is why soffits are on the lowest portion of the roof and the ridge vent is at the highest point. In absence of a ridge vent, other outlet vents such as gable end louvers, and passive roof or turbine vents can be used for natural ventilation. Keep the net area of all the inlet vents and outlet vents the same. Add more vents where appropriate.

    Power ventilation can be accomplished in two general ways. The first is the whole house fan. These fans are usually mounted in a central area or a main hallway. When in operation, outside air is pulled through open windows and exhausted through the attic. Using the correct amount of outlet vents ensures there is no pressure build up in the attic and the fan will run optimally. The second is for attic ventilators that exhaust either through the roof or through the gable. This system also works well with soffits or other air inlets and should be installed at the soffit area or if no roof overhang exists, in the opposite gable. A benefit of powered ventilation is they provide excellent ventilation even with no wind.

    A good rule of thumb is the better insulated the attic; the less power ventilation will help. However, some attics cannot be insulated well or cannot be ventilated using natural methods. For these, powered ventilation is needed for temperature and moisture control.

     Thanks for shopping at the InsulationStop, your leader in attic radiant barrier and reflective foil insulation.
  • Reflecting Summer Heat & Saving Money

    With the extreme heat this summer, this short post describes our radiant barrier attic insulation and how for a minimal investment you can go a long way to having a cooler home and less AC bills.
  • Choosing Radiant Barrier Foil or Bubble Foil Insulation?

    In the foil insulation industry, there are many names used to describe the actual products that consumers use. Some of these names are confusing to those without experience working with foil insulation. This quick video is designed to let you easily determine the major differences between the products, specifically radiant barriers and bubble foil insulation.

  • InsulationStop New Attic Radiant Barrier Foil

    Welcome to the official introduction of our new line of attic radiant barriers. In order to fulfill our pledge of providing you with the best insulation at the best prices, we are pleased to introduce our new line of foil, Attic Radiant Barrier Maximum.

    At a 28 lb. weight per 1,000 square feet is the strongest weight available on the market. It's strong enough for any residential or commercial project and will not tear making installation much easier. It's also energy star approved.

    It's available in either perforated or non-perforated. Attic Radiant Barrier Max ships fast via UPS, sometimes the same day of order. Delivery to anywhere in the country is usually within 4 business days.

    Our RB Max Foil ships "Free" so the price you see online is the price you pay. Additional discounts are given for multi-roll orders.

    RB Maximum is offered in the following sizes for any general purpose or attic radiant barrier insulation application.

    48" x 250' PerforatedInsulationStop Heavy Duty Radiant Barriers 48" x 250' Non-Perforated 48" x 125' Perforated 48" x 125' Non-Perforated 26" x 250' Perforated 24" x 250' Perforated 24" x 250' Non-Perforated 24" x 125' Perforated 18" x 250' Perforated 16" x 250' Perforated 16" x 250' Non-Perforated

    Click on this link for our Attic Radiant Barrier Foil Insulation Category Page. On this page are videos and illustrations as well as our products to better help you understand your attic how to properly insulate.

  • Attic Foil Insulation, Radiant Barrier Sale

    Are you planning an attic insulation project? Don't forget to include theRadiant Barrier Attic Foil Closeup radiant barrier. And, at these prices we are making it as affordable as possible to get the energy savings you are looking for.

    Ventilation, the appropriate amount of fiberglass, and some foil insulation are a sure fire recipe for a healthy, energy efficient attic. This radiant barrier has been designed for use in attics. It's strong but flexible makingRadiant Barrier Attic Foil installation easy. It's perforated to allow for necessary moisture transfer and best of all, it's priced to sell.

    You will not find a lower delivered cost anywhere. We offer Free Shipping on our entire selection of radiant barrier and foil bubble insulation products. If you find a lower, delivered cost on the same product we will match that price plus an additional 5%.

    Give us a call or visit our website. Thanks for shopping at

  • Adding Attic Insulation, Don't Forget the Radiant Barrier

    Read any energy saving article and you're sure to be reminded to add more attic insulation. Now that the focus is on energy savings, most homes, even ones built just a few years ago are now considered under insulated. Take a look at the Department of Energy's web site. They have a zip code calculator that gives recommended ratings for fiberglass insulation depending on your location.

    Here comes the reflective foil insulation. If you are going up in your attic to add more insulation you are obviously concerned about your energy bills or making your home as efficient as possible. Don't come down from the attic without installing a radiant barrier. An attic radiant barrier will save you an extra 15% on your monthly utility bill.

    Let's run some quick numbers. If your monthly heating or cooling bill is $200, the addition of a radiant barrier saving you 15% energy usage is $30 per month. That is $360 per year. For this amount you can insulate a 2000 square foot home. You will get a return on your investment in as little as one year. For larger homes, the monthly energy cost is more and therefore the savings. The ROI is still about a year.

    From the practical side, you have already decided to invest in your home. You are already going to be working in the attic. Make sure to go the extra distance and insulate as effectively as possible. You'll save thousands while you own your home, increase the effectiveness of the fiberglass insulation, and create a barrier to control the transfer or radiant heat.

  • Attic Radiant Barriers and Consumer Aluminum Foil

    Reynolds Wrap Aluminum Kitchen FoilSometimes there are some stories so bizarre that you can't make them up. At least three times in the past few weeks, we have inadvertently found information where consumers are thinking or attempting to put aluminum foil (the kind used in the kitchen) as a replacement to an attic radiant barrier product in their attics.

    We had to dig a little deeper, and it seems the motivation to do such a thing appears to be financial. You can go out and purchase 1000 square feet of Reynolds Wrap for approximately $20-30 dollars. The same amount of our attic radiant barrier product delivered is under $200.

    Folks, you have to understand, these products are not the same. First, our attic radiant barrier, all of our insulation for that matter, reflects 96% of radiant heat. This is not just because they are made with aluminum; it is because they are made with high commercial grade aluminum that is tested to reflect radiant heat at this level. Your store bought aluminum is made from recycled aluminum and is not designed or tested whatsoever for this use.

    The other major issue is size and durability of the products. Our foil rolls are 48" long allowing you to cover your attic in the least amount of passes possible keeping your installation time to a minimum. Can you imagine running 12" sections of kitchen aluminum foil? Kitchen foil cannot even hold a staple to install. The thought is so comical that we have created a special offer.

    Here's the offer. For anyone that has successfully installed kitchen foil in their attic and will share pictures with us for re-creation on our site, we will send you out the equivalent square footage of actual radiant barrier attic foil in order for your attic insulation project to actually work.

    By the way, here are some other fun facts we found that your kitchen foil might actually work for. Sorry, insulating your attic wasn't one of them.

  • Radiant Barrier Cool Roof Requirements in Roseville, California

    In Roseville California, in order to obtain a re-roof permit you need to meet certain code requirements. An alternative to these, "Cool Roof Requirements" as they are called is re-roofing while using radiant barrier insulation. After further examination, this is a solid energy savings concept.

    You need a permit to re-roof in Roseville and you have to meet additional energy requirements. At a minimum, they are only requiring you provide a radiant barrier in your attic. And from an insulation and energy efficiency perspective you should.

    If every home in Roseville was re-roofed or built new using radiant barrier foil just in the attics the amount of savings in total to those homeowners would be significant. The product cost is a small fraction of the long term savings. And insulating from within the attic (not the roof top) can easily be done by the competent homeowner. 

    We wanted to share with you this information. This is a good step to a more efficient tomorrow.

    Here's their radiant barrier re-roof alternative radiant barrier cool roof requirement roseville california. It's a good page and shows you the different installation methods they accept. And, here are their complete cool roof requirements.

    Click here for our attic radiant barrier foil insulation.

  • Radiant Barrier Sale, Attic Foil Insulation

    Are you planning on insulating your attic this year? Are you installing a radiant barrier? For two weeks, until April 1st, we've lowered the price on our attic radiant barrier insulation. Call it our Spring Attic Insulation Sale! Don't forget, we offer Free Shipping as well.

    Our attic insulation is a perforated sheet of woven polyethylene bonded between two sheets of highly reflective aluminum. It's strong and very flexible making installation easy. The roll is 500 square feet, measuring 48" x 125'.

    The only insulation that stops radiant heat effectively is a radiant barrier. Our radiant barrier attic insulation will block 96% of radiant heat absorbed and transmitted through your roof this summer. Your home will feel cooler and you will not use your AC as much thereby saving on your energy bills. Visit us at our on line store to learn more.

    For the most efficient attic possible, don't forget to add some pink stuff. There are new levels recommended for fiberglass, cellulose, etc. Call your local building code office for info on your location or search the Department of Energy's website.

    As always, please contact us with any questions. We appreciate your business.

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