The insulation rock wool board sometimes breaks when it is being used. What are the reasons for the break? What are the measures to prevent it from breaking? Below is the introduction of the reasons for the cracks in the rock wool board and the anti-cracking measures.

     1. Reasons for cracks in the protective layer and decorative layer of the insulation rock wool board:
     ①The shrinkage and deformation of the protective layer and the decorative layer are large, and cracks are generated.
     ② Stress is concentrated on the openings of doors and windows, causing cracks on the protective layer and outer layer.
     ③The bonding strength between the protective layer and the thermal insulation layer is low
     2. Measures to prevent the thermal insulation rock wool board from breaking:
     ① Please use micro-expansion anti-cracking mortar or polymer mortar with high bonding strength, small shrinkage deformation, and good elasticity. Due to the soft texture of the  insulation rock wool board, the thickness of the anti-cracking mortar is preferably 25 mm to 30 mm.
     ②Use steel wire mesh or steel wire mesh rock wool sandwich board to strengthen the layer. On the other hand, the steel mesh can strengthen the connection between the structural layer and the insulating layer and the protective layer. On the other hand, it can disperse the shrinkage stress and stress concentration of the protective layer and the decorative layer. In order to achieve the purpose of reducing and preventing cracks. If the wall may crack, local reinforcement measures must be taken.
     ③In order to reduce shrinkage and thermal stress, please separate the protective layer and do waterproof caulking.
     Above is the introduction of reasons for the cracks in the insulation rock wool board and the anti-cracking measures. Hope this can bring you some help.