Fire rating is an index that measures the fire resistance of a material. Rock wool as A commonly used in construction, pipeline, industrial and other fields of thermal insulation fireproof material, its fire rating up to class A non-combustible. But grade A is divided into A1 grade and A2 grade, then the rock wool fire rating is A1 grade or A2 grade?

According to the "Classification of Combustion Performance of Building Materials and Products", fire protection grades are usually divided into class A non-combustible, class B non-combustible, and class C combustible. Among them, Class A non-combustible materials have the highest fire resistance, which can effectively prevent the spread of fire in the event of a fire, and gain valuable time for personnel evacuation and fire fighting. The A-class non-combustible material is divided into A1 and A2 two levels, A1 grade material fire performance is more excellent.

So, is the fire rating of the rock wool board A1 or A2? This is mainly related to the quality of rock wool. High-quality rock wool can reach A1 grade fireproof material, which means that it has extremely high fire resistance, even under extreme high temperature conditions, it will not burn or release harmful gases, and can effectively protect the safety of building structures and personnel.

The reason why the rock wool board can meet the Class A fire protection standard is due to its unique material and structure. Rock wool board with natural rock as the main raw material, after high temperature melting fibrosis treatment. This inorganic fiber material has excellent fire resistance and chemical stability, and can maintain stable physical and chemical properties at high temperatures. At the same time, the fiber structure of the rock wool board forms dense tiny pores, which can effectively prevent the transfer of heat and flame, so as to achieve excellent fire protection effect.

In building applications, rock wool board is widely used in external wall insulation, roof insulation, fire isolation belt and other fields. Its excellent fire performance provides safe and reliable protection for the building and reduces the risk of fire. At the same time, the rock wool board also has excellent thermal insulation, sound insulation and other properties, providing a comfortable use environment for the building.

Rock wool fire rating can reach A level, and high-quality rock wool can reach A1 level, with better fire and flame retardant performance, providing a strong guarantee for building safety.