What is a radiant barrier?

A radiant barrier is a highly reflective material that is installed in buildings to reduce heat transfer and increase energy efficiency. It is usually installed in the attic, stapled to the underside of the roof rafters, to reflect heat away from the rooms below.

Does a radiant barrier really work?

When installed in the attic, a radiant barrier reflects radiant heat away from the rooms below helping keep the indoors cooler in the summer and increasing heating efficiency in the winter. This leads lead to lower energy costs because heating and air conditioning systems don't have to work as hard to maintain comfortable temperatures.Radiant barriers can lower attic temperatures by up to 30+ degrees in hot summer months.

What is the best way to install radiant barrier in an attic?

The most effective way to install a radiant barrier in an attic space is stapled to the underside of the roof rafters and on gable walls in an attic space.

Is a radiant barrier bad for shingles?

No. Studies have shown that radiant barrier only raises the temperature of the shingles by 2-5 degrees Fahrenheit. Given that the temperature of roofing shingles on a sunny day is between 160° and 190° F, this 2-5 degree increase is negligible.Roofing materials manufacturers have stated that the installation of a radiant barrier doesn't void their product warranties.

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Radiant Barrier - Xtreme®

SKU: RG-X-542-B-26

$109.00 - $7,630.00 $209.00 - $9,072.00

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$275 shipping for 1/2 pallet - $375 full pallet

Multiple roll order discounts - see below

🔥 Keep Your Attic From Becoming a 140°F Oven🔥

RadiantGUARD® Xtreme reflects 95% of radiant heat, lowers attic temperatures by up to 30°F, and helps reduce cooling costs by up to 15%. Installed in thousands of homes, barns, and metal buildings across America.

🎥 View live temps in an attic in Frisco, Texas with RadiantGUARD®

★★★★★ Rated 4.8/5 by 200+ verified customers - Real reviews from actual customers. No incentives. No paid reviews.

In Stock & Ready to Ship • Fast Shipping from Texas

Over 20 Years of Industry Experience • Millions of Square Feet Installed • Thousands of Customers Served Nationwide • Certified ASTM-tested performance

Not sure how much you need? Call toll free 866-528-8412 ext 103 and we'll help you calculate your attic coverage

Does Your Attic Feel Like a Furnace?

Your attic shouldn’t feel like a furnace in the summer. RadiantGUARD Xtreme radiant barrier attic insulation is your first line of defense—reflecting 95% of radiant heat and dramatically reducing attic temps by up to 30°F. That means a cooler home, less strain on your A/C, and more money back in your pocket.

Whether you’re a homeowner tackling a summer project or a contractor looking for proven performance, RadiantGUARD Xtreme delivers results that last.

Your attic shouldn’t feel like a furnace in the summer. RadiantGUARD Xtreme radiant barrier attic insulation is your first line of defense—reflecting 95% of radiant heat and dramatically reducing attic temps by up to 30°F. That means a cooler home, less strain on your A/C, and more money back in your pocket.

Whether you’re a homeowner tackling a summer project or a contractor looking for proven performance, RadiantGUARD Xtreme delivers results that last.

Xtreme® reflective attic insulation barrier

🔥 Blocks 95% of Radiant Heat Year Round
Keeps heat away from your attic, agricultural barn, or metal building in the summer and locks in heat in the winter.
📉 Lowers Attic Temps by Up to 30°F
Reduces the strain on your HVAC ductwork system and enhance your indoor comfort, particularly during intense summers.
💰 Cuts Cooling Costs by Up to 10–15%
Reduces your monthly electric bill by making your insulation system more efficient.
🏡 Ideal for Homes, Barns & Metal Buildings
Versatile enough for residential attics, agricultural structures, and commercial applications. Perforated for breathability. Tear-proof for longevity. Chemical-free for your safety.
🛠️ Easy to Install – DIY-Friendly
Lightweight design makes it simple for homeowners or contractors to install with basic tools and requires no protective gear. Just staple it to the underside of your attic rafters (and gable walls for full coverage), and you’re done.
🧪 Industrial-Grade Quality • Built for Performance
Tear and puncture resistant exceeding ASTM standards with a Class A/Class 1 Fire Rating giving you code-compliant peace of mind.
🤝Trusted by Homeowners, Contractors & Building Professionals for Over 20 Years
Backed by over two decades of industry experience, RadiantGUARD® has earned the confidence of thousands of customers through quality products, expert support, and proven results - Millions of Square Feet Installed • Thousands of Customers Served Nationwide
📦 Ships Fast – Rolls or Pallet Quantities Available
Order a single roll or buy in bulk—ready to ship nationwide from our Texas warehouse.

End roll of RipGUARD White radiant barrier

Installing in an attic space

Radiant barrier insulation is often installed in attics, either stapled to the roof rafters or directly to the roof decking.

Most Attics Can Be Completed in a Single Weekend

✔ Basic tools only

✔ No special training required

✔ No protective clothing needed

✔ DIY-friendly installation

We don't recommend installing radiant barriers over the attic floor. If you must, make sure there is sufficient air flow in the attic. This will help prevent condensation from forming under the radiant barrier on the attic floor. Also, over time, dust accumulation can decrease the effectiveness of a radiant barrier placed on the attic floor.

Radiant barrier insulation is often installed in attics, either stapled to the roof rafters or directly to the roof decking.

Most Attics Can Be Completed in a Single Weekend

✔ Basic tools only

✔ No special training required

✔ No protective clothing needed

✔ DIY-friendly installation

We don't recommend installing radiant barriers over the attic floor. If you must, make sure there is sufficient air flow in the attic. This will help prevent condensation from forming under the radiant barrier on the attic floor. Also, over time, dust accumulation can decrease the effectiveness of a radiant barrier placed on the attic floor.

How to Install

Technical Datasheet

Based on knowledge gained from 20+ years in the reflective insulation marketplace, we’ve designed all our reflective products using the highest quality raw materials, manufacturing processes, and lamination machinery available in order to exceed ASTM testing requirements for performance and safety.

Radiant barriers are not created equally. Choose RadiantGUARD for stellar quality backed by certified specifications and a reputation you can trust.

Based on knowledge gained from 20+ years in the reflective insulation marketplace, we’ve designed all our reflective products using the highest quality raw materials, manufacturing processes, and lamination machinery available in order to exceed ASTM testing requirements for performance and safety.

Radiant barriers are not created equally. Choose RadiantGUARD for stellar quality backed by certified specifications and a reputation you can trust.

Download Datasheeet

FAQ

: A radiant barrier is a highly reflective material that is installed in buildings to reduce heat transfer and increase energy efficiency. It is usually installed in the attic, stapled to the underside of the roof rafters, to reflect heat away from the rooms below.
: When installed in the attic, a radiant barrier reflects radiant heat away from the rooms below helping keep the indoors cooler in the summer and increasing heating efficiency in the winter. This leads lead to lower energy costs because heating and air conditioning systems don't have to work as hard to maintain comfortable temperatures.
Radiant barriers can lower attic temperatures by up to 30+ degrees in hot summer months.
: The most effective way to install a radiant barrier in an attic space is stapled to the underside of the roof rafters and on gable walls in an attic space.
: No. Studies have shown that radiant barrier only raises the temperature of the shingles by 2-5 degrees Fahrenheit. Given that the temperature of roofing shingles on a sunny day is between 160° and 190° F, this 2-5 degree increase is negligible.
Roofing materials manufacturers have stated that the installation of a radiant barrier doesn't void their product warranties.

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