Fixing system fully self supporting system- single length site roll formed sheets concealed roof fixing system, Breathing roof– allows for expansion and contraction durability, With 65 mm seam height proven to be very good for flow of rainwater, Material and finishes: Superior AL Alloy meant for exterior applications and stucco embossed finish, Durability and Corrosion Resistance Awarded the British Board of Agreement certificate confirming the roof system has a service life of 40 years in normal environment.