Non-backed metallized pet radiant barrier factory bonded to cellulosic substrate

[0016]In various exemplary embodiments, the present invention comprises a radiant barrier sheathing product 2 formed by directly bonding an unbacked, metallized polyethylene sheet or film 10, 12, or similar sheet or film, directly to a wood, wood-based, manufactured wood, or cellulosic panel or structural panel 20. The resulting combined overlay radiant barrier sheathing product may be stronger and lighter than, and the process eliminates the cost and conversion expense of, prior art combined overlay products.

[0017]In contrast to the prior art, in several exemplary embodiments the present invention comprises a very thin layer of aluminum (or similar metal) 12 deposited via vapor deposition manufacturing processes onto a PET sheet 10 to form a metallized PET sheet 10, 12. The thickness of the deposited metal may vary according to the particular application but is generally described as very thin, and may, in some embodiments, range from 2 to 5 microns in average thickness. While the des