How to select membrane matrix materials using for the roof and exterior wall Membrane-structured buildings and tent warehouses are required to be equipped with the designated construction materials certified by the Minister of Land, Infrastructure, Transport and Tourism in terms of product quality and for the fire prevention purpose. Moreover, membrane matrix materials to be used for roofs or sections where fire is likely to spread differ in each of the fire-prevention district, the quasi-fire-prevention district and the specific district as defined by Article 22, which are established to prevent fire from spreading in the urban area. To use an appropriate membrane matrix material, let us introduce the way of selection for each application.