Application of Fiberglass Mesh in External Insulation System of Thin Plastered Exterior Walls

In the exterior wall thin plaster insulation system, alkali-resistant fiberglass mesh cloth and plastering mortar are constructed on the outer surface of the insulation core material to build a solid and reliable protective layer for the entire system. After the fiberglass mesh is combined with the cement-based plaster mortar, this protective layer, which is only a few millimeters thick, needs to provide the system with functions such as impact resistance, cracking resistance, and negative wind pressure resistance. It plays the role of "keel" in the insulation system. Its quality will directly affect the overall quality of the external insulation system, especially the safety of the system. Therefore, special attention should be paid to the quality identification, inspection and acceptance of mesh cloth.

Identification of Fiberglass Mesh Cloth

According to the different fiberglass mesh cloth components used to weave fiberglass mesh, it can be divided into three types: alkali-free, medium-alkali and alkali-resistant fiberglass mesh. Medium-alkali and alkali-free glass fiber mesh is made of medium-alkali and alkali-free glass fiber by knitting and coating. The medium-alkali and alkali-free glass fiber mesh itself does not have alkali resistance and relies on the organic resin coated on the surface. Alkali-resistant fiberglass mesh cloth is made of alkali-resistant fiber knitted and coated. The alkali-resistant fiber contains a certain amount of zirconium oxide (ZrO2) and titanium dioxide (TiO2). The two form an alkali-resistant protective film in the fiber and have good alkali resistance. The organic resin coated on the surface of the mesh cloth determines the initial alkali resistance of the mesh cloth. The zirconia content in the glass fiber determines the long-term alkali resistance of the mesh cloth. Therefore, the alkali-resistant mesh cloth is far better than the medium-alkali and low-alkali mesh. The alkali corrosion resistance of alkali fiberglass mesh. At present, the fiberglass mesh on the market is mixed, with various varieties and uneven quality. There are many differences between high-quality mesh cloth and inferior mesh cloth in appearance, smell, feel, craftsmanship, performance and price (as shown in Table 1), so users need to have a certain ability to distinguish.

Comparison of Characteristics of High-Quality and Inferior Fiberglass Mesh

When using fiberglass mesh, you should judge the quality of the product through some basic characteristics to choose the best quality product.

High-Quality Fiberglass Mesh

Exterior:
The apertures are consistent; the radial and weft directions are horizontally and vertically regular; there are no burrs on the edges; and the glass fiber wire diameter is slender.

Odor:
Acrylic emulsion application has a light latex smell and is not pungent.
Touch feeling:

It does not irritate your hands, is firm and does not change its shape in the longitude and weft directions, has no tingling sensation when you pinch it, can be kneaded into a ball without threads, and can automatically recover.

Craftsmanship:
Produced by the raw material leakage drawing process, a large amount of emulsion is applied.

Performance:
Alkali-resistant fracture strength and high retention rate.

Inferior Fiberglass Mesh

Exterior:
Apertures vary in size; random diameters in longitude and latitudinal directions are frequent; edges are burred and uneven; glass fiber wire diameter is short and thick.

Odor:
PVC emulsion and vinyl acetate emulsion coatings are pungent.

Touch feeling:
The hand hurts when pinched, is severely deformed when pulled, is too hard to be kneaded, and is easy to break.

Craftsmanship:
Recycle variegated waste glass as raw material and use clay crucible drawing process to produce it; or use mixed yarn (imitation platinum yarn) to produce, which has a higher degree of imitation than platinum yarn.

Performance:
alkali-resistant fracture strength retention rate is not enough.

Fiberglass Mesh, The "Keel" In the Thin Plastering System

As the "keel" in the thin plastering system, the fiberglass mesh yarn and plastering mortar are composited to form the protective layer of the entire external insulation system. The quality of the two and their composite quality have a significant impact on the performance of the protective layer, which directly determines the entire external insulation system. System safety and durability! When choosing mesh cloth, it is recommended to give priority to alkali-resistant glass fiber mesh cloth or high-quality alkali-resistant coated mesh cloth produced by professional manufacturers. The weight should be controlled above 160g/㎡. This is a very cost-effective investment because it ensures It provides peace of mind after the project is completed; alkali-resistant glass fiber mesh is preferred to maximize its resistance to alkali corrosion and maintain its strength during long-term use. This option directly increases the project cost but is extremely limited. However, reducing or compressing such rigid costs will directly cause the safety and durability of the external insulation system to be compromised, making it difficult to sleep and eat! In actual projects, there are too many engineering cases to reduce limited rigidity costs and choose cheap and low-quality fiberglass mesh, resulting in large-scale peeling of the external insulation system!

Tainuo, A Reliable Fiberglass Yarn Manufacturer

Fiberglass screens have many advantages, and to ensure that you buy high-quality fiberglass, it is necessary to choose a trustworthy fiberglass yarn manufacturer (https://www.tainuofiberglassmesh.com/). Tainuo Fiberglass Mesh Factory, established in 2000 and located in Renqiu City, Hebei Province, has focused on the production of fiberglass mesh for many years. If you want to purchase fiberglass mesh for the construction, please contact us, We are glad to help you with our high-quality production.