Is Mesh Hanging Required for Painting Prefabricated House Panels?

Mesh hanging is required when painting prefabricated house panels. The specific reasons are as follows:

Compensating for Interface Deformation and Preventing Cracking and Detachment

The expansion coefficients of prefabricated panels and lightweight partition panels differ from that of concrete. When environmental factors such as temperature and humidity change, the degree of shrinkage and expansion varies among different materials, leading to stress concentration at the interfaces. Mesh hanging can serve as a transitional layer to compensate for this interface deformation, enabling different materials to work together more effectively and thereby preventing issues such as wall cracking and detachment caused by uneven shrinkage. For example, during seasonal transitions when temperature fluctuations are significant, without mesh hanging, fine cracks may appear at the interfaces between prefabricated panels and surrounding materials. Over time, these cracks may gradually expand, affecting the aesthetics and lifespan of the wall. With mesh hanging, the connection strength at the interfaces is enhanced, reducing the occurrence of cracks.

Enhancing Wall Structural Strength

Mesh hanging can increase the overall structural strength of the wall. During the painting process, the wall is subjected to certain external forces, such as the application and scraping of paint. Mesh hanging provides an additional support structure for the wall, making it more robust and better able to resist these external forces, thereby reducing wall deformation and damage. Especially in areas prone to collisions or friction, such as corners and around doors and windows, the effect of mesh hanging is more pronounced, improving the wall's impact resistance and extending its lifespan.

Addressing Wall Cracks and Strengthening Adhesion

If the wall itself has cracks, mesh hanging before painting is highly necessary. Mesh hanging can strengthen the adhesion between the wall treatment layer and the base layer, tightly integrating the treatment layer with the base layer to prevent the wall from cracking again later. When there are cracks on the wall, simply applying paint makes it difficult to ensure that the cracks will not reappear. With mesh hanging, the paint can better adhere to the mesh surface, forming a unified whole, effectively concealing the cracks and improving the wall's flatness and aesthetics.