Application of Hot-dip Galvanized Welded Mesh in Crack Preve

　　The key point to ensure the construction quality of building exterior wall insulation is to avoid the deformation of building exterior wall insulation layer, which leads to cracks, seepage, aging and other problems in the exterior layer. Therefore, the joint operation between thermal insulation layer and building base is the most important. At present, there are several problems in the construction of exterior wall insulation of houses.<

　　Functional Problems of 1.1 EPS Board Products

　　Expanded EPS board is a kind of economical, practical and excellent thermal insulation material for construction. Its tensile and compressive strength is high, and it is simply processed and made into other shapes. When building foreign trade coatings, cracks are generally caused by the shortage of construction smoothness of the external wall, which results in the thermal elastic stress of crack-resistant mortar due to the thickness of insulation layer. Cracks occur locally when EPS plates are transversely and vertically metasomatized. When the outer wall is thicker, cracks will appear, because excessive thickness will lead to a decline in the flexibility of the mortar, and when EPS board is shortened, cracks will appear. In the construction process of EPS board, the quality of products does not meet the requirements of relevant standards, which will also lead to cracks in the plastering layer. This situation not only affects the construction of the irrelevant, but also seriously damages the protective layer, shortening the life of the house construction.

　　Hot-dip galvanized welded wire mesh plays a certain thermal insulation effect in the external wall system of the house. The quality level and durability of hot-dip galvanized welding net are directly related to its application function. If the gap between hot-dip galvanized welding net and polyphenyl board is too small, or if the hot-dip galvanized welding net is outside the coating mortar, it will hinder the effect of hot-dip galvanized welding net in the external wall insulation, which will lead to the limited impact strength of the external wall and simple cracks at the joint of hot-dip galvanized welding net.

　　Because in the process of construction design and construction, insufficient attention is paid to the construction details of building external wall insulation, which will lead to construction problems in some joints and special parts, such as side beams of balcony floor, air conditioner panel, etc. However, the wall of the room with water in the house is close to the outer wall without vertical moisture-proof treatment, which leads to the situation that the outer insulation layer of the outer wall is empty and falls off because of freezing and thawing.