Sandwich panels are a fundamental component in modern prefabricated construction. They are widely used for insulation, structural support, and enhancing the energy efficiency of buildings. Among the various types available, Rockwool and PU (Polyurethane) sandwich panels are two of the most popular choices, each offering unique benefits depending on the application.
In this blog, we present a detailed comparison between Rockwool panels and PU sandwich panels across five key factors to help you make an informed decision for your construction needs.
1. Fire Resistance
When it comes to fire safety, Rockwool sandwich panels outperform PU panels. Here’s how they compare:
- Rockwool panels are rated A-level fire-resistant, meaning they are made from non-combustible materials and can withstand high temperatures without catching fire.
- PU sandwich panels are classified as B1-level, indicating they are made from flame-retardant materials. While they don’t spread fire easily, they are not entirely fireproof and rely on the removal of the fire source to stop burning.
Conclusion: For environments where fire resistance is a top priority, Rockwool panels are the safer choice.
2. Thermal Insulation Properties
- PU panels have superior thermal insulation with a thermal conductivity of 0.025–0.028 W/m·K, making them ideal for temperature-sensitive environments.
- Rockwool panels have a thermal conductivity of 0.041–0.045 W/m·K, offering moderate insulation compared to PU.
Conclusion: If energy efficiency and heat insulation are critical, PU sandwich panels are the better option.
3. Waterproofing Ability
- PU sandwich panels provide excellent waterproofing capabilities, making them highly resistant to moisture and water damage.
- Rockwool panels are less water-resistant and may require additional waterproofing treatments for certain applications.
Conclusion: For areas exposed to moisture, such as cold storage units or external walls, PU panels are more reliable.
4. Density and Weight
- Rockwool panels have a higher density, approximately 120 kg/m³, offering better sound absorption and structural rigidity in certain applications.
- PU panels are lighter, with a typical density of around 40 kg/m³, which contributes to ease of installation and reduced structural load.
Conclusion: Choose Rockwool for soundproofing and PU for lightweight and thermal performance.
5. Sound Absorption
- Rockwool panels are known for their excellent sound insulation. Their fibrous composition absorbs a wide range of sound frequencies, making them ideal for environments requiring noise control, such as factories or auditoriums.
- PU panels offer limited sound absorption capabilities.
Conclusion: For projects that require noise reduction, Rockwool panels are the preferred choice.
Applications of Rockwool and PU Sandwich Panels
Rockwool Panels – Best suited for:
- Steel structure plants
- Air clean room ceilings
- Roofing and wall cladding
- Projects requiring fire resistance and soundproofing
PU Sandwich Panels – Best suited for:
- Clean rooms
- Cold storage facilities
- Warehouses and commercial buildings
- Projects demanding thermal insulation and waterproofing
Which Panel Should You Choose?
The choice between Rockwool and PU sandwich panels depends on your project’s specific requirements—whether you prioritize fire resistance, soundproofing, thermal efficiency, or waterproofing.
At EPACK Prefab, we manufacture high-quality Rockwool and PU (Polyurethane Foam) sandwich panels, fully customized to meet your building specifications. As a trusted name in the prefabrication industry since 1999, we are committed to delivering energy-efficient, cost-effective, and durable solutions.
Looking for expert advice on selecting the right sandwich panel?
📧 Email: enquiry@epack.in
📞 Call: +91-8130444477
🌐 Visit: www.epack.in
