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Reflectix Double Reflective Double Bubble is a foil-faced bubble wrap insulation roll with staple tabs, sold here in a 16-inch by 25-foot roll at nominal 5/16-inch thickness. Two layers of 94%+ reflective film sandwich two bubble layers and a polyethylene core, so it blocks radiant heat and resists conductive flow without fiberglass itch. It is the general-purpose pick in the Reflectix line, used for garage doors, rim joists, ducts, crawl spaces, metal buildings and RV or shed retrofits. R-value depends on the assembly and air space, so it competes with foam board on ease and cleanliness rather than on a fixed R-value. Owners rate it highly for handling and quick installation.
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Lowest price we've seen: $21.79 on Nov 14 at Menards; highest $202.08 on Oct 31. Tracked across 4 stores since Oct 31.
Owners rate it 4.7 out of 5 across 568 ratings, praising how cleanly and quickly it installs compared with fiberglass. Complaints center on the thinness of the roll and on getting a real R-value only when it is installed with the right air gap.
Reflectix Double Reflective Double Bubble Staple Tab Insulation is a reflective insulation for new construction and retrofit work. It suits commercial, industrial, metal and post/frame buildings, as well as many DIY projects.
It is built from two highly reflective film layers with 94%+ reflectivity. Two inner layers of insulating bubbles resist conductive heat flow. A center layer of polyethylene adds strength and reliability, and the nominal thickness is 5/16 of an inch.
The insulation is easy to handle and installs with simple hand tools. It has no itchy fibers and makes no mess. It inhibits condensation and has no nesting characteristics for birds, insects or rodents. Its R-value and radiant barrier benefits vary with how it is installed and which configuration is used.
