Specifications two storey economic prefab house for accommodation house and office in the worksite. Good materials for waterproof and heatproof Double storey prefab house prefab kit house, Q235 steel structure for the main frame, EPS sandwich panel for the wall and roof . 1/main materialsEPS/rock wool/PU sandwich panel for the wall and steel structure for the main frame. 2 Low cost: The completely knock-down of the house components can save more space of the container and make the cost of house lower. 3 Fast installation: Six skilled workers can finish installation of 240m2 in 3 days for the light steel structure. 4 .Long life span: The components of the house can be used repeat so the shelf life is over 20 years without any building garbage. 5. Wind load and eaquake resistance: The steel structure makes the house resisting heavy wind of 120km/h and 7 grade earthquake. 6. Waterproof, Fire proof and heat insulation: The waterproof system on the roof makes the house a good sealing effect.Color steel sandwich panel has a good fire proof and heat insulation performance for the characteristic of the color steel sheet and polystyrene material. 7. Environment-friendly: The prefab house can be recycled used many times,the proportion of goods damaged is low, does not produce the building rubbish. The annual average use cost of this house is lower other materials house.