Mesh cloth is used for exterior wall insulation, but if it is improperly operated during construction, it will cause wall cracks and other later wall problems. Let's learn about the specific consequences:
In the external insulation system of polystyrene boards, the mesh cloth plays a reinforcing role. The quality of the mesh cloth itself, the construction quality, and durability are directly related to the durability of the entire system. However, in some projects, the mesh cloth is pasted closely to the polystyrene board or exposed to the surface layer glue, which is not conducive to the reinforcing effect of the alkali-resistant glass fiber mesh cloth on the system, resulting in insufficient impact strength of the surface layer. , and prone to surface cracks.
Special parts such as window sills, balconies, awnings, overhangs, gutters, and parapets are prone to problems. Because these parts are difficult to construct, and because each company has different practices, there are more adverse reactions. It is more common that the mesh overlap in these parts is not enough, the ends are not handled properly, or the surface glue is not tightly sealed, causing rainwater leakage and even thermal bridges. Among the newly completed buildings in China in recent years, due to poor external insulation construction, wall leakage occurs more often at windows, water droplets, overhangs, etc., and it is difficult to plug leaks because Leaking points are difficult to find accurately.
Improper construction of mesh cloth will not only fail to achieve the thermal insulation effect but also cause serious wall cracks in the later period. When purchasing mesh cloth, try to choose emulsion mesh cloth, which will not irritate your hands and has high tensile strength.
