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Knowledge Base

Radiant barrier roll end
Radiant barrier installed on attic rafters
Radiant barrier closeup
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
Radiant Barrier - Xtreme® 1000 sf (breathable)

Radiant Barrier - Xtreme® 1000 sf (breathable)


$169.00 USD

Lowers your attic temperature up to 30 degrees by blocking 95% of the radiant heat.  Roll  covers 1,000 square feet.

Available sizes:

  • 48-inch wide roll for 1,000 sf
  • 51-inch wide roll for 1,000 sf
  • two 25.5-inch wide rolls for 1,000 sf

Xtreme® reflective attic insulation barrier:

  • is double-sided approximately 6.5 mils in thickness (6.5 thousandths of an inch / .0065 inches),
  • is a Class A / Class 1 fire rated building product,
  • reflects (blocks) 95% of the radiant heat that strikes its surface across an air space,
  • industrialized-strength lightweight and durable design holds staples without tearing,
  • is non-toxic, non-carcinogenic, fiber-free, and does not require protective clothing or respirators to install,
  • is easy to install and maintenance free,
  • is not affected by moisture or humidity,
  • and lowers heating and cooling costs year round.
radiant barrier installed under attic rafters

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.

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.

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Frequently Asked Questions

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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