Mostly low-rise villa roof sloping roof Handan rock wool insulation panels, so the roof structure basically is composed of cold-formed steel members made of color-coated steel roof truss system triangular rock wool insulation panels, light steel structural components in complete closure behind the plate and gypsum board, forming a very strong 'plate rib structure system', this architecture has a stronger earthquake and resist horizontal load capacity Jincheng rock wool insulation board for the seismic intensity of 8 degrees above areas. Color light wind resistance of steel construction weight, high strength, good rigidity, strong deformation. Only one-fifth the weight of buildings brick structure, resistant to 70 meters per second hurricane, so that the life and property can be effectively protected. 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 that can prevent moisture condensation. Forming an outer steel sandwich panels feature full consideration of the structure and strength requirements Changzhi rock wool insulation board, and taking into account the appearance, the inner surface layer is formed into a flat to suit all 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.