When mechanically attaching single ply membranes to a structure, the interface performance of the structure plus the membrane, fastener and pressure plate performance, are key factors in determining the optimal performance of the finished roofing system.
To ensure that a roofing system's resistance to wind uplift can be correctly calculated, the individual combination of fastener type, membrane type and substrate type, should be tested in accordance with UEAtc directive; “Supplementary Guide for the Assessment of Mechanically Fastened Waterproofing” and Factory Mutual FM 4470.
