Color Steel Insulated EPS/Rock Wool Sandwich Panel Board for Roof and Wall SIP Insulation in Prefab Houses

1. Superior Thermal Insulation for Energy Efficiency

• Dual core material options for diverse needs:

• EPS (Expanded Polystyrene) core: Boasts low thermal conductivity (typically 0.033 - 0.040 W/(m·K)), providing excellent heat retention. It effectively blocks outdoor temperature transfer, keeping prefab houses warm in winter and cool in summer, thus reducing energy consumption for heating, ventilation, and air conditioning (HVAC) systems.

• Rock wool core: Offers stable thermal insulation (thermal conductivity 0.036 - 0.044 W/(m·K)) and better high-temperature resistance. It maintains insulation performance even in extreme climates (e.g., cold northern regions or hot southern areas), ensuring long-term energy efficiency.

• Continuous insulation without thermal bridges: The sandwich structure (color steel + insulation core + color steel) forms a continuous insulation layer, minimizing "thermal bridges" (areas with high heat loss, such as gaps in traditional insulation). This further improves the overall thermal efficiency of prefab house roofs and walls.

2. Reliable Fire Safety (Tailored to Residential Scenarios)

• EPS core (flame-retardant grade): Standard EPS cores are often treated with flame retardants, reaching Class B1 or B2 fire rating (per GB 8624 or EN 13501 standards). They self-extinguish when away from fire, reducing the risk of rapid flame spread—suitable for prefab houses in low to medium fire-risk areas.

• Rock wool core (inherent non-combustibility): Made from natural rocks (e.g., basalt) melted at high temperatures, rock wool is a Class A non-combustible material. It does not burn, drip, or release toxic gases during fires, forming a reliable fire barrier for roofs and walls. This meets strict fire safety requirements for residential buildings, especially in high-fire-risk regions.

3. Effective Sound Insulation for Quiet Living Environments

• Sound absorption of core materials:

• EPS core: Its closed-cell structure dampens airborne noise (e.g., traffic, wind) by reducing sound wave transmission, creating a quieter indoor space.

• Rock wool core: With a porous structure, it excels at absorbing both airborne noise and impact noise (e.g., footsteps from upper floors, rain on the roof). It typically reduces noise by 25 - 40 dB, significantly improving the acoustic comfort of prefab houses.

• Composite structure reinforcement: The rigid color steel outer layers and flexible insulation core form a synergistic sound insulation system, outperforming single-layer building materials (e.g., plain steel sheets, brick walls) in blocking external noise.

4. Weather Resistance for Long-Term Durability

• Color steel surface protection: The outer color steel sheets are coated with high-performance finishes (e.g., polyester, PVDF, or SMP coatings) that resist UV radiation, rain, snow, and mild chemical corrosion. This prevents the panel surface from fading, peeling, or rusting, even in harsh outdoor conditions (e.g., coastal areas with salt spray, areas with frequent rain).

• Moisture resistance of cores:

• EPS core: Closed-cell structure prevents water absorption, avoiding mold growth or insulation degradation caused by moisture.

• Rock wool core (water-repellent type): Optional water-repellent treatment ensures the core does not absorb water easily, maintaining its insulation and structural performance in humid environments.