Wayne-Dalton's 9000 series steel garage doors have a center core made of "polyurethane foamed-in-place insulation," a heat-resistant material that bonds the steel outer panels together. A resin coating on the door's exterior also creates a protective barrier, helping to prevent the spread of flames and reducing the amount of billowing smoke. $700 to $2,000, depending on size and design. Wayne-Dalton Corp.,
Mt. Hope, OH; 888-827-3667.