> Jeld-Wen makes what are called door skins, which make up the back and front of a door, and are expensive and difficult to produce. Jeld-Wen sold door skins to door makers, but Jen-Weld also made and sold doors as well. So it both sold to its door skin customers, and competed with them as the final buyer of doors.

Is there a typo here? It makes no sense to that Jeld-Wen would be a buyer of doors.