Eclipse radiant barrier panels are made of a perforated foil material adhered to the company's 7/16-inch, 15/32-inch, and 19/32-inch OSB and 15/32-inch, 19/32-inch, and 23/32-inch rated sheathing plywood. Installed like traditional roof sheathing, the panels block up to 97 percent of the sun's radiant heat, lowering utility bills, improving appliance performance, and enhancing comfort, says the manufacturer. 800-299-5174. www.martco.com