There are some factors lead to the external wall insulation material fire, the fire source is an external factor or a direct factor, polystyrene foam and extruded polystyrene foam which made of XPS raw material, the two kind of combustibles are intrinsic factors.
The experiment found that these two materials are not modified by flame retardant chemical molecules, but only added the local flame retardant to the material. In the event of flames, polystyrene foam and extruded polystyrene foam is likely to cause a fire, and in the combustion process, they will generate the corresponding toxic gases, which endangering the health of human bodies.In other words, these two widely used external wall insulation materials are all with fire hazards.
The high compressive strength of Styroboard XPS makes it ideal for insulating a wide range of floor constructions, especially those subjected to heavy loads such as warehousing, production areas, and car parks. Styroboard XPS can absorb local peak loads as well as adjust to uneven surfaces under pressure. Dimensionally stable, it will also not attract vermin and is resistant to most ground contaminants.
External wall insulation materials of polystyrene foam and extruded polystyrene foam are widely used because of its good insulation, water resistance and air stability, in China's building market. But in the building construction process, we can not completely prevent the emergence of open flame, such as the spark generated during the welding process, which produced a fire source, coupled with the insulation material is combustible, flammable. Therefore, external wall insulation material caused by fire Phenomenon, in fact, "somewhere has long been doomed".