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Improving R-value with Radiant Barrier Over Insulation

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Improving R-value with Radiant Barrier Over Insulation

Ed discusses the biggest energy efficiency mistake in residential homes and how to easily fix it so your home is more comfortable and energy efficient all year long.

For customers who live in COLD CLIMATES and are considering this installation method but have moisture concerns, please check out our SuperPerf™ radiant barrier that was developed to lay on top of attic insulation but is guaranteed not to trap moisture!

SuperPerf™ compared to Original AtticFoil™:
Why You Need SuperPerf™ Radiant Barrier:
How to Install SuperPerf™ Super Breathable Radiant Barrier:
Worried About Dust Accumulation? Learn more:

Shop for SuperPerf™ Radiant Barrier for Cold Climates here:
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Do Radiant Barriers Work? - LP Techshield Review

More info-

Do radiant barriers actually work? If so, how do radiant barriers work?
Jordan tests LP Techshield Radiant Barrier to see if it actually reduces radiant energy emitting into the attic. Using a infrared thermometer he tests both a westwardly facing wall sheathed with LP WeatherLogic and then the west roof deck sheathed with LP Techshield radiant barrier. Even on a overcast winter day with less radiant energy beating on the roof, the wall read 10 degrees hotter!
Imagine what the difference would be in the middle of summer with the sun really shining!
A radiant barrier works by reducing the amount of radiant energy that is emitted into the attic. Emissivity is a materials capacity to radiate energy via infrared waves. The lower the emissivity, the less energy will radiate. Techshield has an aluminum coating on one side, that drastically reduces the emissivity of the material. Aluminum has an emissivity of around 0.05 while wood has an emissivity of 0.9! This means that woudl will radiate over 10 times more energy into an attic than an aluminum radiant barrier.
We must be careful, however, not to assume that Techshield will reduce our heat gain by 10X. Heat transfers in 3 different ways: Conduction (touching), Convection (fluid flow), and Radiation (infrared). Techshield will only reduce the radiated energy emitted into the attic. Anywhere the radiant barrier comes into contact with rafters or insulation, the heat transfer mode will change to conduction, and the radiant barrier will no longer be effective. Because of this fact, it is beneficial to reduce areas contact with Techshield radiant barrier. Advanced framing will help maximize the benefits, but spray foam will negate any benefits as it will come into contact with the radiant barrier.
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Biggest Attic Insulation Scam... REVEALED!

The problem of fluffing is rampant among attic insulation companies and Ed is going to tell you all about it! Watch the video and learn how you can know what to ask for to prevent this scam from happening to you.

Get R-value recommendations:

Find an installing attic insulation contractor:

Read through the most commonly asked questions about attic insulation:
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How Radiant Barrier Works - AtticFoil® Reflects Heat Coming Off The Roof

- How Radiant Barrier Foil Insulation Works In An Attic. Radiant barrier works by reflecting heat coming off the roof. Normally the heat travels across the attic by radiation and is absorbed by the attic insulation. Normal attic insulation only helps to reduce conductive heat (R-Value) flow. Eventually the insulation heats up and the heat is transferred into the home. A radiant barrier will REFLECT the heat coming off the roof and make the INSULATION COOLER. By reducing the insulation temperature, it reduces heat flow into the home.
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Attic

Reflectix® products are an excellent, energy-efficient choice for upgrading your attic system. When installed properly, a reduction of up to 10% in the home’s air conditioning usage can result. The products are clean, lightweight and easy to install. Additionally, attic-mounted HVAC ducts benefit from the reduction of attic surface temperatures.

Do Radiant Barriers Work + Install Tips | My Attic Is Too Hot

If you have a hot attic it can rob your home of precious AC in the summer. Is installing a radiant barrier a good way to keep your attic cool? Also what are some of the wrong ways contractors are installing radiant barrier. In this video Michael talks about what he has done in his own home and others to keep attics cool. Need an estimate? Click here:

✅ If you are a DIYer, here are products that can help you get your attic cool:
Attic Hatch Cover -
Spray Foam Kits -
Solar Attic Fan - (affiliate link)
Radiant Barrier - (affiliate link)
Recessed Light Cover - (affiliate link)
Get the Flir C2 Camera used in this video: (affiliate link)

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Radiant Barrier Foil Insulation - Why Is Air Gap or Space Required?

Ed Fritz, the owner of AtticFoil.com illustrates why you MUST have an air gap on at least one side of the radiant barrier foil insulation for it to be effective. In fact, without an air gap, heat flow is actually accelerated through conduction or conductive heat flow.

Ed also explains and demonstrates the difference between reflectivity and emissivity and he explains why you can never sandwich radiant barrier between two objects and still have it work.

This video gives tips on adding radiant barrier to walls and why you cannot put radiant barrier directly between the shingles and your roofing felt or deck when you re-roof with new shingles. Radiant Barrier Decking works off of emissivity rather than reflectivity. Learn more about reflectivity and emissivity on our website:

Visit for complete information on Do-It-Yourself Radiant Barrier installations, tips and tricks and order online 24 hrs/day with FREE SHIPPING!

AtticFoil® Compared To eShield, Reflectix and Other Bubble Foil Insulation



How Does AtticFoil® compare to products like Solarguard, eShield insulation, bubble foil products, and other foil/foam/fiberglass type products.

Some products CLAIM to have an r-value of over 11 and are ONLY about 1/4 thick. What is never mentioned is that in order to get the R-11 value, the product MUST be installed INSIDE a 2 x4 wood frame and have 3/4 plywood on BOTH sides. It is the ENTIRE assembly or system that achieves an R-11 in a heat flow down test. This requires over 3 inches of dead air.

Radiant barrier products installed in a ventilated attic are NEVER installed in this method, therefore can not achieve an R-11 value as advertised.

In this video Ed Fritz - the owner of reads the FINE PRINT and clearly explains how other products can claim to achieve an r-value of 11 and only be 1/4 thick.

Attic - Radiant Barrier Product

Best Radiant Barrier Install Method? - (Should You Staple Up Or Go Over Your Attic Insulation?)

You've heard about AtticFoil brand foil insulation, you've done your research, you've measured and bought your foil and now it's time to install it. But which method is the best one? Should you staple the foil up on the bottom of the roof rafters/trusses? Or should you lay it on the attic floor, over the insulation? You've seen both and aren't sure what's the best way to do it. Watch this video to find out which method is best for your home and why and if you want more info, visit the website:

*Staple Up Method Instructions:
*Staple Up Method - Truss Attic Instructions:
*Over the Insulation Method Instructions:
*Tall Attic Method Instructions:

**How to Measure Your Attic for Radiant Barrier:
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Radiant Barrier Installation - How To Install Radiant Barrier

- Radiant Barrier Installation - Open-Ridge Staple-Up Method

This video shows the professional installers from installing heavyweight double-sided AtticFoil Radiant Barrier Foil Insulation.

The Open-Ridge or staple up method is usually the best installation method for warm or hot climates. The concept is pretty simple. The roof gets hot and is converted to radiant energy (heat). Radiant heat travels at the speed of light until it is either absorbed or reflected. Normally, the heat is absorbed by attic insulation. By installing radiant barrier attic foil, the radiant heat being emitted by the roof is reflected BEFORE it has the chance to be absorbed by the attic insulation. The result is cooler insulation, less heat gain into the home and a more efficient and comfortable home.

Order Radiant Barrier Online:

Visit for complete information on Do-It-Yourself Radiant Barrier Foil installations, tips and tricks.

Proof That Foil Radiant Barriers Don't Work Directly Under Roofing Shingles - MUST Have an Air Space

If you've ever been told that foil works if you put it under shingles, this video is for you.

Ed finally debunks the myth that radiant barrier works directly under shingles - if only it were that simple! Watch as he lays down a foil underlayment and 4 other underlayment products under shingles and puts them to the test.

If your roof system has an air gap (shingles on a double-deck system, metal on battens, tile, etc) then a radiant barrier can definitely work for you. To see the thermal proof of just how good it works when installed properly, check out this video:

Learn more about RoofingFoil™ here:
Buy the new RoofingFoil™ Underlayment here:

Radiant Barrier Installation Directly Over Attic Insulation

In this video Ed shows you how to install AtticFoil radiant barrier foil over (on top of) your existing insulation to maximize the benefit in the cold months of winter.

For customers who live in COLD CLIMATES and are considering this installation method but have moisture concerns, please check out our SuperPerf™ radiant barrier that was developed to lay on top of attic insulation but is guaranteed not to trap moisture!

SuperPerf™ compared to Original AtticFoil™:
Why You Need SuperPerf™ Radiant Barrier:
How to Install SuperPerf™ Super Breathable Radiant Barrier:
Worried About Dust Accumulation? Learn more:

Shop for SuperPerf™ Radiant Barrier for Cold Climates here:

1/2 face respirator with P100 filter available here:

WHY you should install radiant barrier AtticFoil over your insulation VIDEO here:

How To Install Radiant Barrier In Your Truss Built Attic - (It's SUPER Easy With Two People)

It IS possible to install AtticFoil quickly and easily in a truss built attic using our 26 wide AtticFoil radiant barrier foil rolls. Watch the video for more tips on this type of installation.

Metal Building Insulation - How To Install Radiant Barrier


A basic overview for installing WareHouseFoil radiant barrier in any non-conditioned (no A/C or heat) structure. This works for warehouses, barns, sheds, airplane hangars, storage units, garages, etc.

The main goal is to get a continuous layer of WareHouseFoil under the roof between the roof and the interior of the building. Doing this will prevent 97% of radiant heat gain and produce a cooler building.

Complete installation guide is here:
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Bubble Foil Scams - False Claims About 11 R-Value By Other Products


How Does AtticFoil® compare to products like Solarguard, eShield insulation, bubble foil products, and other foil/foam/fiberglass type products.

Some products CLAIM to have an r-value of over 11 and are ONLY about 1/4 thick. What is never mentioned is that in order to get the R-11 value, the product MUST be installed INSIDE a 2 x4 wood frame and have 3/4 plywood on BOTH sides. It is the ENTIRE assembly or system that achieves an R-11 in a heat flow down test. This requires over 3 inches of dead air. The term up to 11.6 R-value is also used.

Radiant barrier products installed in a ventilated attic are NEVER installed in this method, therefore can not achieve an R-11 value as advertised.

In this video Ed Fritz - the owner of demonstrates how a total the R-11 test result is achieved. The R-11 is achieved by taking a product and incorporating it into a system or assembly using 2x4 wood framing and 3/4 plywood. The ENTIRE system is then tested for downward heat flow.

Why SuperPerf™ Radiant Barrier Over Attic Insulation?

Our new SuperPerf™ Radiant Barrier is designed to use in a cold/mixed climate when you want to add a radiant barrier foil on top of the existing insulation on your attic floor.

If you're worried that putting a radiant barrier over your insulation will trap moisture and cause problems, you're not alone! Some radiant barrier foils WILL trap moisture below and you definitely don't want those! Watch the video to learn about the features of our new SuperPerf™ and why it's going to be the best solution to your energy efficiency and comfort issues in the attic!

How to Install SuperPerf™ AtticFoil® here:

Buy the new SuperPerf™ (or view pricing options) here:

Request a FREE sample packet that includes the new SuperPerf™ here:

Reflectix® Radiant Barrier Vs. AtticFoil® Heavyweight Radiant Barrier

- Ed compares AtticFoil® radiant barrier and Reflectix® side by side. The weight, durability and strength and the cost easily put AtticFoil in a category all its own; there is no question about it: AtticFoil is the best radiant barrier foil you can buy.

Radiant Barrier versus Fiberglass Insulation Hot Box Test

Are you interested in seeing the effectiveness of radiant barriers? Watch this short video from the leader in reflective foil insulation. This hour long hot box test is condensed down to a few minutes but clearly shows how a radiant barrier can control the amount of heat gain in an area. Watch the thermometers as the temperature in the side with just fiberglass insulation goes through the roof, literally!

Radiant Barrier - Short Installation Summary

- Short Summary of How Radiant Barrier Foil Insulation Works In An Attic. Radiant barrier works by reflecting heat coming off the roof. Normally the heat travels across the attic by radiation and is absorbed by the attic insulation. Normal attic insulation only helps to reduce conductive heat (R-Value) flow. Eventually the insulation heats up and the heat is transferred into the home. A radiant barrier will REFLECT the heat coming off the roof and make the INSULATION COOLER. By reducing the insulation temperature, it reduces heat flow into the home. This video addresses the concept of radiant barrier, how to staple it up, partial verses full coverage and attic ventilation.

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