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This is a 4 ft by 25 ft roll of double bubble reflective insulation: two layers of polyethylene air bubbles between two layers of aluminum polyester foil, rated R8 and covering 100 square feet. It reflects up to 97% of radiant heat, resists tearing and staples, and does not compress or absorb moisture like fiberglass. It suits attics, garages, sheds, metal buildings and duct or radiant-floor wraps where a thin, clean barrier is wanted. Against foam board it is thinner and more flexible but has a lower R-value per inch; against fiberglass it is far easier to handle and less itchy, though it blocks radiant heat rather than slowing conductive loss.
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Owners of this type of double bubble foil generally report easy cutting and stapling and a noticeable drop in attic heat. The common complaints are that it is thin, that seams need extra taping, and that it underperforms when installed without an air gap.
This reflective foil insulation has two layers of polyethylene air bubbles bonded between two layers of highly reflective aluminum polyester film. It is rated R8 and is lightweight and durable. The material resists tearing and can take staples during installation.
It reflects up to 97% of radiant heat and emits less than 3%. It does not compress, collapse or disintegrate over time. Moisture and humidity do not affect it, and it helps inhibit condensation and resist mold, mildew, insects and rodent nesting.
Cut it with a utility knife or scissors. Secure it with staples, nails or adhesive. It has no itchy fibers and makes no mess. It can be used to weatherproof attics, garages, warehouses and other spaces.
