1. Before the box-type house leaves the factory, carefully check whether the installation parts are qualified and whether the welding of the box-type house is firm.
2. Check the fireproof performance of the box-type house and whether the wires in the box-type house are hidden in the fireproof pipes. Check whether the two layers of iron sheets inside and outside the box-type house are damaged, and do not expose the insulation layer in the middle.
3. After the wall panels, doors, windows and components of the box-type house are assembled, there must be no visible light gaps. If there is light leakage, it means that the insulation performance of the box-type house is not very good. If there is a gap, there must be air leakage. The roof panel and the supporting components must be reliably connected, otherwise the roof of the box-type house will be easily damaged if there is strong wind or other bad weather.