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 installed on attic rafters

Radiant barrier roll standing against an easel

Xtreme radiant barrier weight test with barbell

Graph showing attic temps with radiant barrier

ASTM C1313 test results for RadiantGUARD Xtreme radiant barrier

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Radiant Barrier - Xtreme®

SKU: RG-X-500-B

$89.00 - $6,672.00 $209.00 - $9,072.00

IN STOCK

FREE SHIPPING for single rolls

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

Multiple roll order discounts - see below

🔥 Blocks 95% of Radiant Heat , 📉 Lowers Attic Temps by Up to 30°F, 💰 Cuts Cooling Costs by Up to 10–15%

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

Order now, ships fast!

Need help, call toll free 866-528-8412 ext 103.

Xtreme® reflective attic insulation barrier:

🔥 Blocks 95% of Radiant Heat
Prevents solar heat gain to keep your attic, barn, or metal building significantly cooler.
📉 Lowers Attic Temps by Up to 30°F
Reduce the load on your HVAC system and increase indoor comfort—especially during Texas summers.
💰 Cuts Cooling Costs by Up to 10–15%
Helps reduce 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.
🛠️ Easy to Install – DIY-Friendly
Lightweight, tear-resistant design makes it simple for homeowners or contractors to install with basic tools.
🧪 Industrial-Grade Quality
Exceeds ASTM standards, with a Class A/Class 1 Fire Rating.
📦 Ships Fast – Rolls or Pallet Quantities Available
Order a single roll or buy in bulk—ready to ship nationwide from our Texas warehouse.

Beat the Heat. Crush Your Energy Bills.

Your attic shouldn’t feel like a furnace in July. RadiantGUARD Xtreme radiant barrier 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.

Built for Performance—Trusted by Professionals

Unlike lightweight imitators, Xtreme is commercial-grade: a 28-pound roll of double-sided reflective foil with industry-leading strength and durability. It's Class A / Class 1 fire-rated and exceeds ASTM C1313 certification for radiant barriers, giving you code-compliant peace of mind.

A Smarter, Safer Way to Insulate

Say goodbye to itchy fiberglass, messy spray foam, or expensive radiant paint. Xtreme installs in hours with basic tools—no protective gear, no specialized training. Just staple it to the underside of your attic rafters (and gable walls for full coverage), and you’re done.

Engineered for Real Life

Perforated for breathability. Tear-proof for longevity. Chemical-free for your safety. Whether you’re a homeowner tackling a summer project or a contractor looking for proven performance, RadiantGUARD Xtreme delivers results that last.

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. The temperature in the attic can be reduced by up to 30 degrees in summer months when enclosing it with an attic foil.

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. The temperature in the attic can be reduced by up to 30 degrees in summer months when enclosing it with an attic foil.

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

Radiant barriers are not created equally. Today’s marketplace offers many different manufacturers with a wide variety of quality.

Based on knowledge gained from 15+ 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. Today’s marketplace offers many different manufacturers with a wide variety of quality.

Based on knowledge gained from 15+ 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.

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.

Save 10% TODAY ONLY with Discount Code: B47PBJMZ1J3X

Save 10% TODAY ONLY with Discount Code: B47PBJMZ1J3X