Installation methods and precautions actual installation of the actual length of the plate, according to the measured length to check the length of the corresponding plate number plates, the plates were cut when needed. Will increase to arrange plate roof plate starting line, with rock wool polyurethane sandwich panels, and the width of the sheet covering the alignment mark line start line. And at both ends of the plate length direction of the length of the discharge structure design. Steel sandwich panel is formed by two layers of metal panels (or other material panels) and directly in the middle of the panel foaming, curing the polymer composition forming the core insulation. The finished sandwich panels easy to install, lightweight and efficient. Filling system is closed-cell molecular structure, polyurethane sandwich panels, you can prevent moisture condensation. Forming an outer steel sandwich panels feature fully consider the structure and strength requirements, taking into account aesthetics, buy polyurethane sandwich panels, the inner surface layer is formed into the plate to accommodate a variety of needs. Characteristics of sandwich panels of polystyrene sandwich namely EPS sandwich panels (currently on the market, the most widely used varieties); namely XPS extruded polystyrene sandwich sandwich; rigid polyurethane sandwich panels That PU sandwich; Third polyester sandwich ie PIR sandwich panels; namely PF phenolic sandwich sandwich; namely RW sandwich rockwool sandwich.