Why Sandwich Panels Are Ideal for Prefabricated Construction？

Sandwich panels (also known as composite panels) consist of two metal facings with an insulated core (e.g., rock wool, polyurethane/PU). Their lightweight, high strength, and rapid installation make them a core material in prefabricated construction. Below are their key advantages:

1. Maximized Construction Efficiency

✅ Factory Prefabrication, On-Site Assembly

• Panels are precision-manufactured (tolerance: ±1mm) and installed directly, 5-10x faster than traditional masonry.

• Example: A 1,000㎡ warehouse wall can be installed in 2-3 days (vs. 2 weeks for brick walls).

✅ Minimized Wet Work

• No plastering or bricklaying required, eliminating weather-related delays (e.g., rain).

2. Superior Thermal Insulation & Energy Efficiency

🔥 Excellent Thermal Performance

• PU core thermal conductivity: 0.022 W/(m·K) (vs. concrete: 1.28 W/(m·K)), reducing energy costs by 50%+.

• Applications: Cold storage, temperature-controlled factories, energy-efficient homes.

❄️ Cold Resistance & Anti-Condensation

• Rock wool panels (density ≥120kg/m³) withstand -40°C, preventing condensation and corrosion.

3. Lightweight Structure, Cost-Effective

🏗️ Reduced Building Load

• Panel weight: 10-20kg/㎡ (vs. brick walls: ~200kg/㎡), cutting foundation costs by 30%.

• Best for: High-rise cladding, rooftop extensions.

💰 Total Cost Savings

• Lower material (less steel framing) + labor (faster install) + long-term energy expenses.

4. Fire Safety & Compliance

🛡️ Flexible Fire Ratings

• Rock wool panels: Class A non-combustible (1-4h fire resistance), ideal for chemical plants/data centers.

• PU/PIR panels: Class B1 fire-resistant (FM-certified), balancing cost and safety.

🌪️ Wind & Earthquake Resistance

• Tested for wind pressure ≥1.5 kPa, suitable for typhoon-prone regions.

5. Aesthetic & Durability

🎨 Diverse Finishes

• Metal facings: Pre-painted (PVDF), wood grain, stone-effect—eliminating extra cladding work.

🛠️ Long Lifespan

• Aluzinc coating (AZ150) provides 25+ years of corrosion resistance with minimal maintenance.

Typical Applications in Prefab Construction