Fire Rating Of Rock Wool Board

The fire rating of rock wool board depends on the specific material. Generally speaking, it can reach the A-class fire protection standard. Rock wool board is made of high-quality natural rocks, such as basalt, gabbro, dolomite, etc. , adding an appropriate amount of binder, through high-temperature smelting and high-speed centrifugation with a four-roller centrifuge to form fibers and solidify, and then through the collection belt to receive letters, pendulum to lay cotton, solidify, and cut to form products of different specifications.



What are the fire ratings
1. Class A: It has excellent fire resistance, is almost incombustible, and can prevent the spread of fire. It is very suitable for the use environment that requires high fire resistance. The average fire resistance of grade A rock wool board can reach 2-5 hours, and the fire resistance is excellent.

2. Class B1: It has good flame retardancy. It is not easy to cause fire and spread rapidly even under open flame or high temperature conditions. It can quickly stop burning after the fire is transferred.

3. B2 grade: It has certain flame retardancy, the grade is lower than B1 grade, and belongs to the flammable grade. When exposed to open fire and high temperature, it will ignite and burn, causing the fire to spread, especially in wooden building environments.

4. Level 3: It belongs to the flammable level, the flame retardant ability is almost zero, and the material itself is extremely flammable, which is extremely rare in general buildings.

Advantages of rock wool board
1. The rock wool board used in the building has strong fireproof performance. Because the raw material is natural rock, it has strong high temperature resistance. In case of fire, it will form a fireproof barrier.

2. It has the advantages of thermal insulation. The cotton filaments used to make rock wool insulation boards are generally slender and flexible, and coupled with their low thermal conductivity, they have a good thermal insulation effect.

3. It has the performance of absorbing noise. Due to its physical properties, rock wool insulation board can absorb sound and reduce noise.

4. The weight of the rock wool insulation board itself is very light, the dry density is between 180 and 250, and it does not take up extra indoor space.

Disadvantages of rock wool board
1. Rock wool board cannot replace slope finding, and you need to make slope finding by yourself. Therefore very troublesome, easily delay the time of construction.

2. The water absorption of the rock wool insulation board is very good, so excess water is easy to accumulate inside the rock wool board. After a long time, it will increase the weight of the insulation layer, which will cause the insulation layer to fall off.