Factors affecting the effect of external wall rock wool insulation board

Factors affecting the effect of external wall rock wool insulation board

1. After the rock wool insulation board is heavy, the tensile strength is low, the water resistance is poor, and the rainwater infiltration causes the rock wool insulation board to wet, the strength of the rock wool insulation board decreases, and the durability is poor. Long-term high moisture content, affecting insulation performance, may affect the safety of fixing to the wall.

2. At present, most domestic products are highly discrete in quality and do not meet the requirements for external insulation.

3. Note that rock wool dust has an impact on the health of construction operators.

4. When the rock wool board is in high temperature and high humidity for a long time, its strength will decrease significantly, especially the slag wool is more obvious (because its acidity coefficient is only 1.2~1.4). When the external thermal insulation system is applied to the outer wall containing the construction moisture, the moisture content will increase during the drying process of the wall, which will affect the durability of the thermal insulation material.

5. Strictly control the water absorption rate of the outer wall insulation rock wool board. Excessive water absorption rate will cause moisture to invade the insulation layer and penetrate into the root of the wall. In the freezing and thawing environment, the area will be damaged by large-area insulation, and it should be waterproofed or used in the system.