A rolling door assembly includes first and second corresponding plastic panels secured to one another by hinged panel interlock. Each panel has first and second interlock parts to each of the upper and lower sides of each panel. The hinged panel interlock is formed by the first interlock part of the first panel securing with the second interlock part of the second panel. Each panel has an edge opening remotely of the hinged panel interlock in opposite ends of each panel. Each panel opening is fitted with an insert having an elongated cylindrical bore which receives an axle of a door roller having a roller head along the side edge of the door assembly.