Performance overtime of membrane materials for membrane structure has prominent important role as a front line of defence barrier between inner and outer space of the structure. This paper deals with the results of ten years out door exposure tests for PVC coated polyester fabrics, intended to obtain much practical and applicable performance data for design for durability or service life prediction of membrane structure. It could be conducted that behaviour of degradation in time, especially, tensile and tear strength are comparatively critical in view of structural safety aspect and this could be applicable as performance based test data for setting service life of the membrane structures and also setting some measures for maintenance operation.
