Patent ID: 8898962

Claim:
A roof system, the components of the system manufactured from plastics material, said system comprising a plurality of trusses, each of the trusses lying along a respective substantially vertical axis, and said trusses spaced apart along the width of the roof to be formed, wherein said trusses are overlaid by a plurality of adjacent panels to form the external face of the roof, and said panels are of a width so as to span the gap between at least two adjacent trusses with the vertical interfaces between adjacent panels located to overlie a truss forming a channel between adjacent panels, said panels have mutually facing panel edge surfaces, said mutually facing panel edge surfaces having a first pair of mutually facing slots opening toward each other into said channel and a second pair of mutually facing slots opening toward each other into said channel; and one or more cover means ( 68 ) configured to prevent the ingress of moisture into the interface are provided to be located over the vertical interface between respective panels, wherein said cover means are retained in position by clip features ( 70 ) that extend between said panels in said channel and into said first pair of mutually facing slots ( 72 ) formed in the mutually facing panel edge surfaces in the channel between the panels and at least part of the cover means clip features are received in substantially horizontal formations of the first pair of mutually facing slots formed in the mutually facing panel edge surface panels; and, engagement means ( 40 ) with a pair of oppositely projecting arms ( 46 ) and ( 48 ) extending between said panels and into said second pair of mutually facing slots in the mutually facing panel edge surfaces.