The Film Insertion Unit is an optional part of the Hilleng Deep Profile Laminating System that installs between the Deep Profile Uncoiling Unit and the Deep Profile Rollforming Unit at the head of the laminating line. It is designed to facilitate removal of unwanted core material to allow an overlapping joint needed to join the ends of mating Deep Profile Roof Panels. The unit applies a protective film to the roof panel steel skin which prevents the core material from bonding to the skin.