... outside cover, galvanized steel sheet as inside cover, with EPS in core. Common panel thickness 30mm, ... as outside cover, plywood as inside cover, with EPS foam in core. Common panel thickness 30mm ... cover, galvanized steel sheet as inside cover,with EPS foam and/or plywood in core. ... from fiberglass sandwich panel with PU form in core.Model F: fiberglass sandwich panel ,with polyurethane foam in ...