Nowadays the wall insulation materials in the market are mainly divided into two categories: benzene board and agent plastic board. The grade of its flammability can be divided into: a grade (non-combustible), b1( non-flammable), b2( combustible), b3( flammable)4 fire protection grades. The burning grade of benzene board is b1, this kind of board price is low, many developers use b1 grade or even inferior benzene board to do the building materials of exterior wall insulation of residential area, resulting in fire accidents occur from time to time when the exterior wall is insulated in China. 

According to the investigation: in recent years, the exterior wall insulation materials of our province are gradually applied with burning property of a grade, such as phenolic foam, rgc light weight partition board, light fire proof partition board, etc. These wall building materials can effectively avoid the fire of electric welding spark drop ignition insulation material during cross construction. According to the state regulations on new building materials, at 1000 degrees Celsius to fire-resistant four-hour non-combustible building materials are qualified national a grade fire-proof materials. At present, it is understood that the light fire partition board developed and produced by Huaquan Lightweight Wallboard Co., Ltd., the panel is calcium silicate board, the core material is a mixture of polystyrene particles, special cement and so on, the fire resistance limit at 1000 degrees Celsius high temperature is 4 hours, the fire resistance reaches the national a extreme standard, at the same time does not emit any toxic gas, completely conforms to the international environmental protection standard; when using, it can be made into a container to hold water without plastering, without any leakage. If a large number of use of this plate can play the role of safety and environmental protection, without losing its energy-saving insulation, to achieve "double insurance" effect. And the new building materials not only good insulation effect, and the thickness of the ordinary insulation board is much thinner, the country has issued policies, a grade fire prevention materials will become the mainstream of the external wall insulation project in the construction industry in China.