Case Study 1: Repairing Joint Cracks in a Residential Two-Tier Ceiling
- The Problem: Eight months after the renovation of a new home, multiple horizontal cracks appeared at the joints of the living room’s two-tier ceiling. The corners were peeling up, and the coating in some areas was flaking off, with the peeled layer showing a separation between the paint and the joint compound.
- Diagnostic Analysis: No expansion joints were left during construction. Standard putty was used as a substitute for joint compound, and the joint tape overlap was only 30mm (insufficient). A dedicated ceiling sealing primer was not used; instead, standard interior paint with insufficient flexibility was applied. Additionally, heavy light fixtures were installed immediately after renovation, causing structural deformation due to stress.
- The Solution:
- Base Layer Treatment: Removed the cracked coating and poor-quality joint compound, and cleaned the surface dust. Left a 5mm expansion joint at the seams and filled it with a dedicated elastic ceiling joint compound. Applied high-strength anti-crack joint tape (60mm overlap) and followed an upgraded “three-coat, three-sand” process. Installed metal corner beads for reinforcement. Applied one coat of dedicated ceiling sealing primer and let it dry for 24 hours.
- Material Selection: Adopted the BANDě Wall System—”Dedicated Elastic Self-Healing Ceiling Primer + High-Elasticity Interior Paint.” The primer features self-healing capabilities, and the topcoat has an elongation rate of 280%, accommodating micro-movements at the joints.
- Construction Control: Executed the work in optimal weather conditions (20-25℃, 50%-60% humidity). Applied the topcoat in 3 thin layers, allowing 8 hours of drying time between coats. Waited 10 days for curing before installing light fixtures to prevent stress on the base layer.
- The Result: Post-repair, the ceiling joints showed no cracking or peeling, achieving a Grade 0 adhesion rating in tape tests. After 1 year of use, enduring seasonal temperature/humidity changes and the weight of the light fixtures, the ceiling remained completely free of cracks or detachment, demonstrating stable performance.
Case Study 2: Resolving Peeling on a Commercial Hotel Curved Feature Wall
- The Problem: Six months after renovation, the curved plasterboard feature wall in a hotel lobby experienced massive peeling. The coating completely separated from the base layer, and the curved lines were uneven, negatively impacting the hotel’s image.
- Diagnostic Analysis: The plasterboard was bent without prior wetting, causing gaps between the base layer and the keel. Standard mesh tape and joint compound were used, lacking the flexibility required for curved surfaces. Standard interior paint with only 120% elongation was applied, unable to accommodate curved deformation. Spraying the paint caused uneven thickness, with paint pooling at the bottom and failing to dry thoroughly.
- The Solution:
- Base Layer Treatment: Completely removed the peeled coating and cleaned the surface dust. Re-bent the plasterboard after pre-wetting it, and increased the screw fixing density (20cm spacing) to ensure tight adhesion to the keel. Applied curved-wall-specific flexible mesh tape and filled joints with elastic joint compound. Leveled the curved surface with specialized curved-wall putty. After sanding, applied a dedicated flexible interface agent for curved walls and let it dry for 24 hours.
- Material Selection: Adopted the BANDě Wall System—”Dedicated Flexible Interface Agent for Curved Walls + Flexible Topcoat.” The topcoat boasts a 320% elongation rate and excellent leveling properties, perfectly adapting to curved surfaces.
- Construction Control: Used a short-nap roller to apply paint along the curved lines. Applied the topcoat in 3 layers, strictly controlling the thickness to 0.1mm per coat. Cured for 15 days post-construction, avoiding any human contact.
- The Result: The restored curved feature wall featured smooth lines with no peeling or cracking. Pressing the curved surface by hand showed no looseness in the coating. After 2 years of high-frequency hotel use, the wall showed zero detachment, offering strong scrub resistance and leaving no marks after cleaning.
Case Study 3: Repairing Efflorescence and Detachment on a Basement Curved Plasterboard Wall
- The Problem: Five months after renovation, the curved plasterboard wall in a villa basement suffered from efflorescence, mold, and peeling. The coating was severely chalky, with multiple blisters on the curved surface, rendering it unusable.
- Diagnostic Analysis: Basement humidity consistently exceeded 75%, causing the plasterboard base to absorb moisture and effloresce. No moisture-proofing was applied, and standard sealing primers and interior paints lacked water and alkali resistance. Gaps between the curved base layer and the structure trapped moisture, leading to coating blisters.
- The Solution:
- Base Layer Treatment: Removed chalky and peeled coatings, and wiped the wall with an efflorescence remover to neutralize the base layer’s alkalinity. After ventilating and drying, re-secured the curved plasterboard (25cm spacing) and applied specialized adhesive between layers. Applied flexible mesh tape at the joints and treated them with elastic joint compound. Applied a dedicated flexible interface agent for curved walls, let it dry for 24 hours, and then applied a waterproof primer.
- Material Selection: Adopted the BANDě Wall System—”Waterproof Primer + Water-Resistant, Anti-Mold Flexible Topcoat.” The topcoat offers 96 hours of water resistance, Grade 0 mold resistance, and a 300% elongation rate, adapting perfectly to curved surfaces.
- Construction Control: Used dehumidifiers during construction to maintain environmental humidity below 60%. Applied the topcoat in 3 layers, allowing 12 hours of drying time between coats. Maintained continuous ventilation during the curing period to ensure complete drying of both the base layer and the coating.
- The Result: Post-repair, the curved wall showed no signs of efflorescence or mold. In water-resistance tests, covering the wall with a wet cloth for 48 hours caused no softening or detachment. After 1 year in a damp basement environment, the wall remained completely free of blisters and detachment, maintaining stable adhesion and thoroughly resolving the pain points of curved walls in damp spaces.
