Is R8 enough to insulate an attic?

R8 is low for a whole attic compared with blown-in or batt insulation, which run far higher. Use it as a radiant barrier under the roof or over existing insulation, not as the only layer.

Does it really block 97% of radiant heat?

The manufacturer rates it at up to 97% radiant heat reflection with under 3% emitted. That figure applies to the shiny foil surface, so keep it clean and face it toward the heat source.

How much area does one roll cover?

The roll is 2 ft by 50 ft, which is 100 sq ft of foil. The listing also states 40 sq ft of coverage, so measure your project and expect to buy more than one roll.

Can I use it around ducts and windows?

Yes. It is commonly wrapped around ducts and stapled or glued behind windows and walls. Leave an air gap on the reflective side for the best performance.

What comes in the box?

One roll of reflective foil insulation, a 2-inch by 180-ft roll of foil tape, an installation squeegee and a razor knife.

The best new price was $9.88 at US Energy Products as of November 4, 2026, with three stores listing it new. Compare per-roll prices, since roll sizes vary between sellers.

Where is the Double Bubble Reflective Insulation cheapest?

At US Energy Products, for $9.88, 65% under what the other stores charge, as of our latest check.

Where can I buy the Double Bubble Reflective Insulation?

3 stores we checked sell it, including US Energy Products, Walmart, eBay.

Double Bubble Reflective Insulation: $9.88 at US Energy Products, 65% under other stores

From US Energy Products

Commercial grade reflective foil insulation with two layers of polyethylene air bubbles bonded between two layers of reflective aluminum polyester film
Thermal Barrier R8 industrial strength, lightweight and durable
Resists tearing and withstands staples during installation
Does not compress, collapse or disintegrate over time
Reflects up to 97% of radiant heat and emits less than 3% of heat
Unaffected by moisture or humidity; helps inhibit condensation and resist mold, mildew, insects and rodent nesting

Sizes: 6 IN x 25FT, 6 IN x 50FT, 6 IN x 100FT, 6 IN x 125FT, 12 IN x 10FT, 12 IN x 20FT, 12 IN x 25FT, 12 IN x 50FT, 12 IN x 100FT, 12 IN x 125FT, 16 IN x 10FT, 16 IN x 25FT, 16 IN x 50FT, 16 IN x 100FT, 16 IN x 200FT, 16 IN x 400FT, 2FT x 5FT, 2FT x 10FT, 2FT x 20FT, 2FT x 25FT, 2FT x 36FT, 2FT x 5OFT, 2FT x 100FT, 2FT x 125FT
Materials: Two layers of industrialized polyethylene air bubbles bonded between two layers of highly reflective aluminum polyester film
Shipping: Free Shipping to the lower 48 States
In the box: 1 Roll of Reflective Foil Insulation, 1 Roll of Foil Tape (2" x 180'), 1 Installation Squeegee, 1 Razor Knife

About the Double Bubble Reflective Insulation

This Commercial Grade Reflective Foil Insulation is engineered with two layers of industrialized polyethylene air bubbles, securely bonded between two layers of highly reflective aluminum polyester film . The result is a Thermal Barrier R8 Industrial Strength insulation product that is both lightweight and durable. Designed to resist tearing, it can withstand staples during installation without damage.

Unlike traditional insulation, this Radiant Barrier Wrap does not compress, collapse, or disintegrate over time. It reflects up to 97% of radiant heat and emits less than 3% of heat, delivering superior energy efficiency.

Safe and user-friendly, simply cut with a utility knife or scissors , and secure in place using staples, nails, or adhesive. There’s no mess and no itchy fibers , making it a cleaner, faster alternative to fiberglass insulation.

Perfect for weatherproofing attics , garages, warehouses, and other spaces, this barrier is unaffected by moisture or humidity , helping to inhibit condensation and resist mold, mildew, insects, and rodent nesting .

• Proudly made and shipped in the USA

• USA and International Fire Codes

Certified with a Class 1 / Class A fire rating

Each kit includes : ✔ 1 Roll of Reflective Foil Insulation ✔ 1 Roll of Foil Tape (2" x 180') ✔ 1 Installation Squeegee ✔ 1 Razor Knife