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The Radiant Barrier RB+ is a perforated, reflective foil insulation sold in wide rolls for attics and building envelopes. It pairs a heavy-duty woven core with a low-emittance foil surface (E=5%, tested to ASTM C-1371) and carries a Class A / Class 1 fire rating. Each roll weighs about 14 lbs and cuts with utility scissors or a knife, so one person can handle and fit it. It suits DIY attic and crawlspace jobs and builders who want a breathable, code-compliant radiant barrier; compared with plain single-sided foil, it is tougher and more tear-resistant but still a radiant barrier, not a bulk insulator, so it works alongside other insulation rather than replacing it.
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RB+ is a perforated, breathable radiant barrier sold as a wide insulation roll. It is a reflective foil wrap for attics and buildings, built with a reinforced woven core. The core has a 10x10 weave. The foil is tested to ASTM C-1371 and has a low emittance of E=5%.
The foil reflects 95% of radiant heat gain and loss. It is tested for surface emittance, water vapor transmission, surface burning characteristics, corrosivity, tear resistance and adhesive performance. It carries a Class A / Class 1 fire rating. It is non-toxic, non-carcinogenic, fiber-free and maintenance-free, and installing it needs no special clothing or breathing masks.
Cut the roll with utility scissors or a utility knife. Staple it to the underside of the attic roof rafters with a staple gun. It can also be installed on all vertical exterior walls in the attic, including gable walls. Actual energy savings depend on installation quality, climate zone and other factors.
