We produce is a new kind of building material, which is widely used by Europe, North America and Japan. Compare with concrete . wood, this material can stop the UV efficiently outside the house, the architects may put some traditional material like foam board that could reduce only a little UV radiant. Our products is designed to be consist of a bubble layer which sandwiched between radiant barrier foil layers, that can reflect up to 97% of heat. It is an energy saving and environmental protection material. It can not only be used in the roof to stop UV entering house in summer. But also can maintain the warm into house in winter. So as to save a lot on energy bill .