Water-Resistant Plasterboard Wholesaler 1220×2440mm 9.5mm Lightweight Moisture Resistant Gypsum Board for Ceilings Interior Walls
As an experienced gypsum board supplier and moisture resistant gypsum board wholesaler, we manufacture 9.5mm water resistant plasterboard specifically engineered for interior applications where moderate humidity resistance is required. This lightweight panel, sized 1220×2440mm (4×8 ft), features a specially modified gypsum core with water-repellent additives and treated facing paper, offering a practical solution that balances reduced weight with enhanced moisture performance.
The moisture resistance of this gypsum board is achieved through advanced core modification. Siloxane-based water-repellent agents are incorporated into the gypsum slurry during production, forming a hydrophobic layer on the gypsum crystals that effectively blocks capillary water absorption. Combined with moisture-resistant facing and backing paper, the board achieves a water absorption rate of only 6.8% — significantly lower than standard gypsum board (often above 20%). This technology maintains dimensional stability and mechanical strength even in environments with relative humidity up to 90%.
| Parameter | Requirement | Test Value (9.5mm) |
|---|---|---|
| Size | 1220 × 2440 mm (4×8 ft) | 1220 × 2440 mm |
| Thickness | 9.5 mm | 9.5 mm |
| Weight | ≤ 9.5 kg/m² | 7.5 kg/m² |
| Flexural Strength (Parallel) | ≥ 360 N | 560 N |
| Flexural Strength (Cross) | ≥ 140 N | 180 N |
| Water Absorption | ≤ 10% | 6.8% |
| Compliance Standards | GB/T 9775-2008, ASTM C1396 | |
- Lightweight design (7.5 kg/m²) reduces labor fatigue and structural loading by approximately 25% compared to standard 12mm boards
- Enhanced moisture resistance with low water absorption rate, suitable for humid interior environments
- Excellent workability — clean scoring and snapping with standard tools
- Good compatibility with joint compounds, paints, and decorative finishes
- Lower transportation and handling costs due to reduced panel weight
• Store panels flat on level supports in a dry warehouse (relative humidity ≤ 85%). Maximum stacking height: 8 panels.
• Allow 24–48 hours acclimatization at the job site before installation.
• Install only when ambient temperature is between 5°C and 40°C and prolonged humidity does not exceed 90%.
• Use dust extraction or wear appropriate PPE (dust mask and eye protection) when cutting.
• Ensure the supporting frame is level and rigidly fixed according to structural requirements.
• Clean surfaces with neutral detergent only. Avoid abrasive or solvent-based cleaners.
- Non-load-bearing interior partition walls in residential and commercial buildings
- Suspended ceilings in offices, hotels, hospitals, and schools
- Bathroom and kitchen walls with controlled moisture exposure
- Renovation projects requiring lightweight and easy-to-handle panels
- Coastal or humid-climate multi-family housing developments
• Supplied 42,000 m² of 9.5mm moisture resistant gypsum board for a large residential development in Southeast Asia, significantly improving installation efficiency.
• Delivered 18,500 m² for a hotel renovation project, with stable performance in humid bathroom and corridor areas.
• Provided 25,000 m² for a commercial office fit-out, where the lightweight design reduced onsite labor fatigue.
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