2x wall frame with attached ribs and a plastic covering.
Spray polyurethane foam bonds the plastic sheet to the ribs and frame.
The patented process may also be used to inexpensively prefabricate walls of siding boards, trim and embedded windows. The trim and windows are laid face down on a flat surface, surrounded by a jig on which siding boards are also laid face down. A frame is suspended above and polyurethane foam poured on the backside to expand and bond everything together. Fast, strong and inexpensive.