fit and sealing between adjacently mated panels 110 referring to fig4 a 4b each panel 110 will continue to move along until it trips a third limit switch 252 the third limit switch 252 activates adhesive spray guns 254 256 which spray adhesive onto the upper membrane 114 each panel 110 with adhesive applied advances while the pib membrane 217 is unrolled and applied to the adhesive treated area of the panel 110 in applying the outer membrane 118 comprising a pib membrane the outer membrane material is provided in as large a roll 217 as possible for optimal production efficiency the pib roll 217 is mounted to a roller driver assembly 218 of the type generally known the pib roll 217 is positioned and introduced from above the production line for the panels 110 after they have been cut by positioning and running the pib roll 217 above the panel production line selective positioning of the pib roll for proper alignment relative to the panels to be formed is achieved as the pib membrane 217 is unrolled it travels through a conventional pinch roll system 220 down a slide 222 and under a pressure roller 224 when one pib roll 217 runs out of material an operator.