Patent ID: 8322113

Claim:
A method of improving a roofing system comprising a thermoplastic roofing membrane, the method comprising: providing one or more base members, a side of each base member being coated with a thermoplastic layer; welding the one or more base members to a top side of the thermoplastic roofing membrane, each base member comprising a lower portion lying against the thermoplastic roofing membrane, the lower portion having two edges, and each base member further comprising two edge portions extending from the base member at the respective two edges and a flange member extending from each of the respective two edge portions, the two flange members each including a top surface, a bottom surface, and an outer edge; and providing one or more cap members, each cap member having two edges and comprising a hook-shaped portion along each of the edges, the hook-shaped portions shaped and sized to engage with respective flange members, the hook-shaped portions extending along at least a portion of the top surface, the bottom surface, and the outer edge of the respective flange members; and attaching a cap member to each of the base members by engaging the hook-shaped portions with the flange members, forming one or more thermoplastic coated raised metal profiles attached to and overlying the thermoplastic roofing membrane.