Galvanized steel wire welded mesh and glass fiber mesh can be distinguished and understood through the roles of these two products in actual projects:
1. Galvanized steel wire mesh: Cracks in block masonry walls are a common quality problem in construction projects. Hot-dip galvanized steel wire mesh plays an increasingly important role in the thermal insulation of exterior wall buildings due to its solid structure, strong integrity, and high corrosion resistance.
Crack-resistant protective layer for tile facings. After the insulation layer is cured and dried, apply the first layer of anti-cracking mortar, with the thickness controlled to 2 to 3 mm. Cut the four-corner mesh into sections according to the structure size for paving. The longest length should not exceed 3m. Pre-fold the four-corner mesh at the corners into right angles. During the process of cutting the mesh, the mesh must not be folded into a dead fold. Net pockets should not be formed during the paving process. After the net is opened, it should be paved smoothly in that direction. First use U-shaped clips to clamp the four-corner net to make it close to the surface of the anti-cracking mortar, and then use plastic anchors distributed in a two-way 500 plum blossom shape. Anchor the four-corner netting to the base wall. Cement nails and gaskets should be used at the ends of the steel mesh on the inner side of the window, parapets, settlement joints, etc. to fix the steel mesh to the main structure. After the four-corner mesh is laid and passed the inspection, apply a second coat of anti-crack mortar, and wrap the four-corner mesh in the anti-crack mortar.
2. The fiberglass mesh cloth plays a role in stress dispersion in the external insulation system. Together with the plaster, it forms the protective surface layer of the external insulation system to resist surface cracking caused by changes in natural temperature and humidity and accidental impacts. The performance of the fiberglass mesh and its compatibility with the plastering mortar are also factors that must be considered in the external insulation system's resistance to cracking.
3. From the above two points, it is not difficult to see that the functions of galvanized steel wire mesh and fiber mesh cloth in exterior wall insulation construction are basically the same, but galvanized steel wire mesh is more suitable for various wall materials than fiber mesh cloth.
4. Usually, if we are at the corner of the wall, we also need to install galvanized steel mesh at the intersection of masonry and concrete beams and columns to improve the overall performance of the surface material.
5. Fiber mesh cloth is also used in the construction of roof waterproof coatings. We often say that fiber cloth can be used for three coatings with one cloth and four coatings with one cloth.
When the exterior facing is tiles, the "galvanized square steel mesh" reinforced structure is better than the "alkali-resistant fiberglass mesh" reinforced structure. The galvanized square steel mesh can effectively balance the crack resistance performance and the base strength requirements of the tiles. The unity between them makes the tensile strength of the reinforcement system ≥0.4, which meets the needs of stability, safety, and durability of the insulation system.
