The usage of rock wool for building thermal insulation generally includes several aspects such as wall thermal insulation, roof thermal insulation, door thermal insulation and ground thermal insulation. Among them, wall insulation is the most important, and two forms of on-site composite wall and factory prefabricated composite wall can be used. One of the former is the internal thermal insulation of the outer wall, that is, the outer layer is made of brick walls, reinforced concrete walls, glass curtain walls or metal plates, the middle is an air layer and a rock wool layer, and the inner side is made of paper-faced gypsum board. The other is the external thermal insulation of the exterior wall, that is, a rock wool layer is attached to the outer layer of the building, and the exterior decoration layer is added. The advantage is that it does not affect the use area of the building. The external thermal insulation layer is fully enclosed, which basically eliminates the phenomenon of hot and cold bridges, and the thermal insulation performance is better than the internal thermal insulation of the external wall. Factory prefabricated composite walls are various rock wool sandwich composite panels. The promotion of rock wool composite wall is of great significance to the building energy conservation in my country, especially in the cold northern regions.

Rock wool board is widely used for heat preservation and heat insulation of equipment and buildings such as tanks, boilers, heat exchangers, etc. with a large plane and radius of curvature. The general use temperature is 600℃, and it can also be used for heat preservation and fire protection of ship bulkheads and ceilings. The role of rock wool glass cloth seam felt is mainly used for heat preservation and heat insulation of equipment with complex shapes and high working temperature. The general use temperature is 400 ℃. If the construction volume is increased to more than 100 kg/m3, the bulk density of the heat preservation nail is increased and the metal outer protection is adopted.