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There are some problems in the construction process of extruded board, such as: there is no protective layer, the construction process often encounters cross-operation of open fire, and it is easy to cause fire. However, few people realize that when a fire occurs in a building in use, the external insulation system with poor fire resistance promotes the fire. Many communities have cracking problems. Thermosetting polystyrene board styrene foam insulation board has high strength, is not easy to crack, and has a certain toughness, which can effectively prevent the cracking of the external wall caused by the sinking of the main body.

According to the actual situation on site, before the construction of the external wall insulation system, the original wall tiles need to be chiseled, the leveling layer is retained, and the hollow and cracked parts of the leveling layer wall are cleaned and leveled as a whole, and then the external wall insulation construction is carried out. The vertical reference line is hung in the large corners and other necessary positions of the building's external wall. The horizontal line is hung at the appropriate position of each layer to control the verticality and flatness of the polystyrene board.

Extruded board does not have this expansion problem, so generally no expansion joints are required. If there are protrusions on the house, cut the extruded board and then lay it on. Most of the time, extruded boards are used for other bonding processes. During the bonding process, knocking, slapping, and shaking of the panel surface cause hollowing and false pasting of the adhesive mortar, as well as hollow cracks in the protective layer, surface layer, and plaster layer. This is often caused by the loss of control of the construction process. During the construction, the process was not strictly carried out in accordance with the engineering regulations.