How to inspect EPDM roofing.

Use this thread to discuss the entry How to inspect EPDM roofing. at the InterNACHI Blog

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mechanically attached, in which fasteners similar to plastic caps are used to fasten the edge of each course before that edge is overlapped and sealed by the next course. Mechanical fastening allows some billowing of the membrane. The amount of billowing will depend on the spacing of the fasteners and the pressure differential between the interior of the building and the exterior surface of the roof; and

there are metal plates also…to behonest in my 15+ years on these types of roofs we have never used plastic…just my 2 cents