Rigidal's composite panel, Rigidal Thermozip, has been chosen by roofing contractor Weatherwise to create a curved roof on a production building at Muller Dairy, Market Drayton. For the main building curve, 17m long panels were end lapped using factory-installed lap plates. Running 50m from eaves to eaves, the jointed panels are self-curved to a radius of 120m. A finish of natural mill aluminium was used to reflect solar gain and improve energy efficiency. Available in aluminium or steel, these composite panels comprise an external weather sheet and internal liner sheet, autohesively bonded to a continuously applied CFC-free rigid urethane insulation core.