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This is a 1/8-inch reflective foil insulation with a single layer of trapped bubbles between two foil faces. It is sold in 300, 500 and 750 sq ft rolls at 4 or 6 feet wide, and it doubles as a vapor barrier. It is aimed at duct, pipe, water heater and garage door jobs where a thin, clean wrap beats bulky fiberglass. Against batt insulation it gives far less bulk but reflects radiant heat and installs with no special tools; it is not a substitute for a full stud-cavity fill.
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Single Bubble Foil/Foil Reflective Insulation is a thin, lightweight roll insulation, 1/8" thick. It is mainly used to insulate ducts, pipes, water heaters and garage doors. It also works as a vapor barrier.
It resists the three types of heat flow: conduction, convection and radiation. It also forms a barrier against moisture, air currents and vapors. It resists mold, fungus and insects, and it gives rodents no place to nest.
The material is pliable and compact, and it resists punctures, tears and cracking. It conforms to complex shapes, and installing it requires no special tools or clothing. It needs no maintenance.