Abstract: A support roller having a one-piece construction which can be cut to size to fit any sized doorway, with an outer perimeter of the support roller or flanges mounted on the support roller having a predetermined configuration to permit a rolling door, gate and the like to assume a substantially circular configuration when rolled up on the support roller, the support roller or each of the flanges being provided with a longitudinally extending recess therein and a longitudinally extending bulge portion thereon for securely mounting an end of the rolling door, gate and the like thereon, where the recess and the bulge portion of the support roller or a rail member provided within the support roller engages with collar portions of the roll-up mechanism to prevent relative rotation therebetween so that the support roller rotates with the collar portions The roll-up mechanism includes a coil spring mounted between the collar portions in such a manner that the innermost collar portion winds up the coil spring when the

Abstract: A roll-up door formed of a plurality of elongated adjoining slats connected together by continuous hinges so as to permit the roll-up door to maintain a vertical planar arrangement to provide a closed position, and to roll up along an arcuate track arrangement for storage of the door to provide an opened position. Elongated insulating sleeves are coextensively insertable along each slat for receiving insulation material therein. At opposing sides of the insulating sleeves are suitable connecting arms for engagement with an associated one of the continuous hinges to retain the insulating sleeves in position along the slats without interferring with the hinged movements of the slats between the opened and closed positions.