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.
To ensure the correct fasteners are used in every Sarnafil roofing system, Sika supply a range of Sarnafil fasteners including thermally broken tube fasteners, pressure plates and fasteners, manufactured to our specification by SFS Intec Ltd. This enables Sika to provide a Sarnafil guarantee that covers the roofing system* and its attachment, for both product failure and resistance to wind uplift, backed by Product Liability and Professional Indemnity Insurance.
* The roofing system (vapour control layer, insulation, membrane and ancillary components) is only covered if a Sarnafil Extended Products guarantee is used. If a Sarnafil Product guarantee is required, only the waterproofing membrane, its attachment and any ancillary components, are covered.