1. The concentration of stress at the openings of doors and windows leads to cracking of the protective layer and facing layer.
2. The quality of the external wall insulation layer is poor, the adhesion is small, and the unit weight is large. If it is not treated in time, the insulation effect of the wall will be greatly reduced.
3. The plastering layer is cracked, and the plastering layer of the metal carved insulation board is composed of plastering mortar and steel mesh. Plastering mortar is divided into base mortar and surface mortar. When constructing the plastering layer, firstly, plaster the bottom mortar on the surface of the installed external wall insulation board, and add reinforcement mesh. The reinforcement mesh should be applied shallowly into the base mortar, and then the surface mortar should be applied over it. The thickness is not less than 3mm, and the lines are not exposed.
4. Due to long construction time and weather changes, the adhesion of the insulation layer decreases and falls off.
5. Indoor condensation, these exposed concrete parts without thermal insulation treatment will cause indoor frost and condensation, which will easily cause the wall to be damp and moldy.
6. The shrinkage and deformation of the protective layer and the decorative layer are relatively large, which leads to cracking of the thermal insulation and decoration integrated board.
7. The outer wall bricks are hollow or fall off.
8. The expansion coefficients of thermal insulation materials and exterior decoration materials are different.
Generally speaking, under normal circumstances, there will be no cracks in the metal embossed sheet, but in case of purchase at the acceptance office, it must be carefully inspected and accepted. Before the construction, it is also necessary to do a good job of inspection to ensure that there is no problem with the board before construction and installation. It is also necessary to install in strict accordance with the correct installation method to avoid damaging the board in the wrong way and causing it to break.
