Coryell Roofing delivers a roofing system that meets rigorous insurance requirements . . . Hitachi Vantara’s insurance policy had stringent requirements for wind and hail ratings. The experienced Coryell Roofing team designed a system that would fill the bill! The team installed a fully adhered 60 mil Duro-Last membrane with a mechanically fastened recovery board. Hitachi Vantara continued business as usual as Coryell established a roofing system that met their insurance requirements!