Key Points for Light‑Weight Gypsum Plaster with Mesh Reinforcement
1. Application in humid environments
Prohibition: Light‑weight gypsum is not suitable for humid areas such as bathrooms and kitchens. It tends to absorb moisture, deform and even get moldy, impairing the bonding performance between gypsum and mesh fabric.
2. Improper base surface treatment
Prohibition: Direct construction on walls with dust, oil stains or uneven surfaces will result in poor adhesion, and hollowing and cracking may occur in later stages.
3. No interface agent applied
Prohibition: Without applying special interface agent on smooth walls, the adhesion of gypsum will be greatly reduced, undermining the mesh‑reinforcing effect.
4. Inappropriate mixing time
Prohibition: Insufficient mixing causes lumps; excessive mixing accelerates setting and degrades gypsum properties.
5. Neglect of leveling with screed rails
Prohibition: Direct plastering and mesh installation without setting mortar dots and screed rails makes it hard to guarantee the flatness and verticality of walls.
6. Direct hanging of heavy objects
Prohibition: Light‑weight gypsum walls have limited load‑bearing capacity. Reinforcement or embedded supports shall be prepared in advance for heavy loads. Mesh reinforcement cannot improve load‑bearing capacity.
7. No layered construction
Prohibition: Excessively thick single‑coat plaster is prone to shrinkage cracking. Construction shall be carried out in layers; apply the next coat only after the previous one is fully dried.
8. Inadequate curing
Prohibition: Proper water sprinkling curing is required after construction. Otherwise, the surface may powder or have insufficient strength, weakening the bonding strength between gypsum and mesh fabric.
9. Corrosion caused by direct contact between gypsum and mesh
Prohibition: Long‑term contact between weakly‑acidic gypsum and generally metallic mesh may lead to corrosion. Corresponding preventive measures shall be adopted.
10. Disregard for construction specifications
Prohibition: Construction of light‑weight gypsum plaster with mesh reinforcement shall strictly follow construction specifications. Non‑compliance may cause wall cracking, peeling and other defects.