Shandong Guangri Building Material Co., Ltd. tells you here that in China, exterior wall insulation materials are mainly classified into four levels: A, B1, B2 and B3:
Class A thermal insulation materials are inorganic thermal insulation materials according to the current "Classification Method for Combustibility of Building Materials". Class A is non-combustible materials. However, as far as the market is concerned, there are few class a insulation materials, only glass wool, rock wool board, foam glass and vitrified beads.
However, compared with Class A thermal insulation materials, organic thermal insulation materials are more popular in the market. This kind of insulation material is classified as B grade, which is divided into three grades: B1 grade is flammable, B2 grade is flammable, and B3 grade is flammable.
Flammable insulation material is determined according to the fire resistance limit of the material. In addition, the material division of different parts is also different. Common, such as EPS/XPS insulation board with flame retardant after special treatment.
Flammable insulation materials, mostly EPS expansion polystyrene foam insulation board and XPS Extrusion board, that is, we often say the general board. This material has low ignition point and releases a lot of harmful gases during combustion.
Flammable thermal insulation materials, which are mostly polystyrene foam materials as the main insulation materials, because this material is highly inflammable, it has been eliminated external wall insulation materials.
For more details about Class A1 fire-proof and thermal insulation materials, please pay attention to our company's official website: