Three Misunderstandings of Exterior Wall Exterior Thermal Insulation and Fire Protection
1. Stop grading and standards in strict accordance with European and American norms
It is understood that at present, the idea of relevant standards in Europe and the United States is to classify insulation materials and fragmentary extinguishing stops, and different fragments should be used on buildings of different fire prevention grades. The use height of flammable material insulation fragments is strictly and clearly regulated. Basically, the rules only allow the use of non-flammable material insulation fragments above 22 meters, and the use of flammable material insulation fragments below 22 meters. Even when the use of flammable material insulation fragments below 22 meters, when the thickness of polyphenyl board is thicker (e.g. Germany exceeds 100 mm), or when higher requirements for fire prevention are put forward, certain knots should be adopted. Institution of fire prevention measures, such as using non-combustible materials to make fire prevention structure in doors and windows, and setting up fire prevention isolation belt, etc.
2. To deal with hidden fire hazards in construction stage can deal with the achievements of external thermal insulation and fire prevention.
At present, there is a concept that most of the fires in exterior thermal insulation construction projects are caused by construction site fires, while there are few fire cases in exterior thermal insulation construction projects in use. The fire safety of exterior thermal insulation can be guaranteed by dealing with hidden fire hazards in construction stage.
In this regard, the expert believes that, from the importance and temporary point of view, dealing with hidden fire hazards in the process of building use is the center of fire safety. He pointed out that most of the existing external thermal insulation projects in the international fire, in the construction process, the use of external thermal insulation buildings in the process of fire cases are absolutely less. The reason is that the inorganic thermal insulation board is bare in the construction process, without any maintenance layer. The construction process is often subject to fire penetration operation, which is prone to fire. However, few people realize that when a fire breaks out in a building in use, the fragments of external thermal insulation with poor fireproof performance can promote the fire.
3. Complex Fire Protection Structure with Rules and Non-stop Fire Classification
Some people think that when the inorganic heat preservation materials are only used fragmentally over 24 meters, a fire-proof isolation belt is added to each or two layers, and the fire-proof classification is not stopped for the fragmentary external heat preservation.
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