Whether fiberglass mesh cloth has moisture-proof and mildew-proof properties requires a comprehensive analysis of its material properties, production process and actual application environment. This material uses glass fiber as the base material and is made into a mesh structure through a textile process. It has certain physical properties, but its moisture-proof and mildew-proof abilities are not naturally possessed, but are closely related to subsequent processing and usage. Glass fiber itself is an inorganic non-metallic material and does not have hygroscopicity. From the perspective of material properties, a simple fiberglass mesh cloth will not mold due to moisture in a dry environment, but in a humid environment, if there is no protective treatment, moisture may penetrate through the pores of the mesh cloth, thereby affecting the substrate to which it is attached, and indirectly causing mold growth.
The moisture-proof and mildew-proof properties of fiberglass mesh cloth depend largely on the surface coating process. In most cases, in order to enhance the performance of the mesh cloth, a layer of alkali-resistant coating, such as acrylics or high molecular polymers, is applied to its surface during the production process. These coatings can not only improve the alkali resistance of the mesh cloth, but also form a protective film to a certain extent to reduce moisture penetration. High-quality coating technology can form a continuous protective film on the surface of the mesh cloth to prevent water vapor from entering, thereby reducing the risk of moisture. However, if the coating quality is poor or uneven, moisture may still penetrate from weak points, especially in a long-term high humidity environment, the protective effect of the coating will gradually decrease, and mold may still grow.
The humidity conditions of the application scenario have a significant impact on the moisture and mildew resistance of fiberglass mesh cloth. In a dry indoor environment, such as a well-ventilated room after wall decoration, the mesh cloth mainly plays an anti-cracking role, the probability of moisture is low, and generally there will be no mold problems. However, in a humid environment, such as a bathroom, kitchen or basement, the air has a high moisture content and the wall is prone to moisture. Even if a coated mesh cloth is used, if it is in this environment for a long time, if the waterproof treatment is not in place, moisture will still penetrate through the wall or coating gaps. When the mesh cloth comes into contact with a damp substrate, the moisture in the substrate may be retained in the fiber gaps of the mesh cloth, providing a breeding ground for mold, especially under suitable temperature conditions, the mold will multiply rapidly, causing the surface of the mesh cloth or even the wall to mold.
Whether the waterproof treatment during the construction process is in place directly affects the moisture and mildew resistance of the fiberglass mesh cloth. In wall construction, mesh cloth is usually used in the plaster layer or insulation layer, and its moisture-proof and mildew-proof ability depends on the integrity of the overall waterproof system. For example, in the construction of the bathroom wall, if only the mesh cloth is laid without the waterproof layer of the wall, the water vapor will penetrate into the wall through the gaps of the tiles, and cannot be discharged in time after contacting the mesh cloth, which will cause mold over time. The correct construction process should first waterproof the base layer, then lay the mesh cloth, and finally construct the finishing layer to form a multi-layer protection, so as to effectively prevent moisture intrusion and improve the moisture-proof and mildew-proof effect of the mesh cloth.
Fiberglass mesh cloth with different weights and structures also has differences in moisture-proof and mildew-proof performance. Generally speaking, mesh cloth with a larger weight has denser fibers and smaller pores, and has a stronger barrier effect on moisture. It is relatively less likely to be damp in the same environment. The mesh cloth with a smaller weight has a sparse structure and is easier for moisture to penetrate. In addition, some mesh cloths use a multi-layer composite structure or a special weaving process to further enhance the water-blocking performance. When such products are used in a humid environment, the moisture-proof and mildew-proof effect will be better. Therefore, when choosing mesh cloth in high humidity scenes, it is necessary to select products of appropriate specifications according to specific needs.
Daily maintenance and environmental management are equally important for the moisture and mildew resistance of fiberglass mesh cloth. During long-term use, if there are signs of water seepage on the wall or damp spots on the surface of the mesh cloth, the cause must be promptly investigated and repaired. For example, when the joints of the bathroom wall tiles fall off and cause water seepage, the joints should be repaired in time to prevent further water intrusion. Regularly ventilate the environment and reduce indoor humidity, especially in the rainy season or humid areas. The moisture content in the air can be reduced by installing exhaust fans and using dehumidification equipment, thereby reducing the risk of mesh cloth getting damp and moldy.
It should be noted that the moisture and mildew resistance of fiberglass mesh cloth is relative, and it is impossible to completely eliminate the problem of mold in a humid environment. In an extremely humid or long-term water-immersion environment, even if high-specification mesh cloth and perfect waterproof measures are used, problems may occur due to exceeding the tolerance limit of the material. Therefore, in practical applications, it is necessary to reasonably select materials according to the environmental humidity level, and combine reliable waterproofing technology and post-maintenance to maximize the performance of fiberglass mesh cloth and delay or reduce the occurrence of moisture and mold.
