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Fire rating requirements for external wall insulation materials

With the rapid development of the construction industry, the application of external wall insulation materials in modern buildings is becoming increasingly widespread. However, in recent years, multiple building fire accidents have attracted widespread attention to the fire resistance performance of exterior wall insulation materials. In order to ensure building safety, relevant national and local departments have formulated a series of fire rating requirements for exterior wall insulation materials.

1、 The importance of fire rating

The fire rating of external wall insulation materials is directly related to the fire safety of buildings. When a fire occurs, if the insulation material is flammable, it will accelerate the spread of the fire, increase the difficulty of firefighting, and even threaten the safety of people's lives and property. Therefore, it is crucial to choose insulation materials that meet the fire rating requirements.

2、 Common fire rating standards

At present, China mainly regulates the fire rating of exterior wall insulation materials based on the national standard "Code for Fire Protection Design of Buildings" (GB 50016). This specification categorizes the combustion performance of insulation materials into four levels: Class A (non combustible), Class B1 (flame retardant), Class B2 (combustible), and Class B3 (flammable).

3、 Fire rating requirements for different buildings

Tall buildings: Due to the difficulty of evacuation and the high risk of fire, high-rise buildings have stricter requirements for the fire rating of external wall insulation materials, usually requiring the use of Class A or B1 materials.

Public buildings: Schools, hospitals, shopping malls and other public places with dense population and serious fire consequences also require the use of insulation materials with higher fire resistance levels.

Residential buildings: The fire rating requirements for residential buildings can be appropriately relaxed according to specific circumstances, but they still need to meet basic fire safety standards.

4、 Selection and usage suggestions

When selecting external wall insulation materials, priority should be given to products with higher fire resistance ratings. At the same time, during the construction process, it is necessary to strictly follow the specifications to ensure a firm bond between the materials and the base layer, without any hollowing, cracking, or other phenomena.

In short, strictly adhering to the fire rating requirements of exterior wall insulation materials is an important measure to ensure building fire safety.