Mostly low-rise villa roof sloping roof, composite boards, so basically the roof structure is made of cold-formed steel members made of color-coated steel triangular roof truss system, light steel structural member After sealing plate and gypsum board, forming a very strong 'plate rib structure system', the composite board prices, the ability of this architecture has a stronger earthquake and resist lateral loads applied to 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. Stiffness: As core material and two layers of steel wool into a cohesive whole, to work together, plus surface-pressure wave from the roof, the overall stiffness far better than rock wool clip pressure plate (glass cotton) The site composite sheet. Sandwich through the connecting members and purlins fixed, rock wool composite panels, greatly improving the overall stiffness, color steel roof prices, strengthen the overall performance of the roof. Selection wool sandwich panels, purlin distance can be larger, it can save purlin dosage of 1/3 to 2/3.