From reference lists of the participating elastomer EPDM producers SKZ selected 39 roofing projects in Germany, Austria, the Netherlands and Sweden, from late 90s ranging in age and installed between 1968 and 1996. From the samples taken, the mechanical properties were determined, such as hardness, tensile strength and elongation at break. On all roofs that were investigated, the EPDM roofing materials fulfil its function as waterproof membranes completely, the samples were visually no serious ageing visible. Final Outcome is based on the useful life HERTALAN® EPDM roofing> 50 years.
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