| Summary |
While the composite of glass fiber fabric and teflon resin has been in use as the permanent architectural membrane for approximately sixteen years in the United States. it seems to be not much experience and study on durability of that in Japan. In particular the configuration of Japan's land is long and narrow extended north and south. That is why the variation of its natural environment is remarkable. We are pleased to write the outcome of long-term experiment on weathering durability performed at four places (Sapporo, Yokohama, Saitama and Okinawa) so as to show how the effect of the fabrics will be turned out against the variable natural environment. As things turned out, we found the characteristics of the fabrics have not almost been affected by the change in weather condition for five years in Japan.
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