As the roofing materials and wall boards are made with hard iron plates painted with high-strength enamel to prevent corrosion, they are very strong in resistance to nature and keep long their inherent ingredients and color.

The hard iron color plate is widely used as roofing materials of industrial buildings. It being light in weight and easy to assemble, it is also applicable to the construction of open-air stores and to partitioning of offices and living rooms, etc.

The heat insulating composite board is a building material retaining heat and cold, which is made by attaching color iron plates to both sides of the foam plastic board. Its form, length and thickness can be changed according to uses so it is convenient for the construction of exterior walls and roofs of buildings.

The hard iron color plate and wall board are popular for their modern aesthetic value and good architectural effect.