A sectional door (20) having a plurality of panels (21,22,23,24), one of the edges (40) between adjacent panels on a first panel having a substantially concave curvilinear surface (45), the other of the edges (50) having a planar surface (52). The hinges include a first hinge element (66) having a first leaf (67), a cylindrical first knuckle (72) at one edge of the first leaf, a through slot (73) proximate the first knuckle and a second hinge element (80) having a second leaf (85), a cylindrical second knuckle (81) at one edge of the second hinge element extending into the through slot and rotatable about the first knuckle. A panel (22) for sectional door (20) having a foam core (140,240,340), an inner surface (145,245,345) and a recess (150,250,350) in the inner surface and the foam core extending the longitudinal length of the foam core. A bracket assembly (110) for the bottom (35) of the door including, an L-shaped plate (111), a sleeve (120) for receiving a shaft (121) mounting one of the rollers (122), fasteners (115) for attaching the L-shaped plate to the lower panel and cut-outs (125) in the cylindrical sleeve positioned substantially above the fasteners whereby the fasteners may be removed only when the shaft is not positioned in the cylindrical sleeve. Conveyor apparatus (400,500) for the continuous production of foam-cored door panel material (22'), a second conveyor (402,502) having engaging surfaces (451,464;535,540) for engaging spaced skin surfaces (146,146) and an offset skin surface (150).