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Author: Site Editor Publish Time: 2025-07-17 Origin: Site
Rock wool metal sheets and polyurethane foam metal sheets are two common types of sandwich panels used in construction, each with its own characteristics. To help you understand and choose clearly, I will compare them from several key dimensions.
The following table summarizes the differences in their core characteristics, making it easy for you to quickly grasp：
Rock wool metal sheet sandwich panel | Polyurethane foam metal sheet sandwich panel | |
Fire resistance performance | Class A non-combustible (made from natural minerals such as basalt), with a fire resistance limit of 1 to 3 hours | B1 grade flame retardant (self-extinguishing when removed from the fire source), flame retardant added |
Thermal insulation performance | Better (thermal conductivity approximately 0.041-0.046 W/m·K) | Excellent (thermal conductivity approximately 0.022-0.028 W/m·K), with remarkable energy-saving effects |
Moisture-proof and waterproof | It has a strong hygroscopicity, which can be improved after hydrophobic treatment. However, its heat preservation performance decreases when it becomes damp | Excellent (closed-cell rate over 95%), good hydrophobicity, and minimal impact from long-term immersion |
Weight | Relatively heavy (density 80 to 150kg/m³) | Lightweight (density 30-60kg/m³) |
Strength | The compressive strength is relatively low | It is relatively high (one-time foaming molding), with good compressive and deformation resistance |
Durability life | Poor-quality products may become powderized and brittle within 3 to 5 years due to the evaporation and oxidation of the binder | Long-term stability (Under normal usage and maintenance conditions, the average service life can reach over 30 years) |
Cost | Medium | The cost of single-board materials is usually high, but the overall energy-saving benefits may be better |
Applicable scenarios | Places with extremely high fire protection requirements: pharmaceutical factories, chemical plants, and fire isolation belts of high-rise buildings | The places with core insulation requirements: electronic clean rooms, constant temperature and humidity workshops, cold storage | |
How to choose?
After understanding the core differences, you can make decisions based on specific needs
1. Clarify the core demand: Fire safety first or insulation and energy conservation priority?
Or are there strict weight limits or moisture-proof requirements?
2. Examine the specific application environment: Is the environment humid? Is it corrosive? Are there any special requirements for cleanliness and hygiene (such as antibacterial properties)?
3. Consult professionals: Inform the architect, fire protection consultant or professional panel supplier of your project details (building type, purpose, regional climate, budget, etc.), and they can provide a more practical solution.
4. Obtain samples and conduct tests: If possible, request samples from multiple suppliers to directly compare their texture, strength, and surface effect, and even conduct simple burning tests (pay attention to safety) or water immersion tests.
5. Pay attention to the overall cost: Don't just look at the price of each single board. Take into account installation efficiency, energy-saving benefits in the later stage, maintenance and replacement costs, as well as service life.
In addition, there are a few more reminders:
Compliance is the bottom line: No matter which material is chosen, it must be ensured that it complies with the fire protection regulations, building energy efficiency standards and other relevant regulatory requirements of the project location.
Quality is better than price: The quality of products from different brands and with different production processes varies greatly. It is of vital importance to choose suppliers with good reputation, stable quality and certification, especially for fireproof materials which are related to life safety.
Pay attention to construction quality: "Three parts materials, seven parts construction." Only by choosing a professional construction team and ensuring standardized installation can the performance of the materials be fully utilized.
I hope this information can help you make a more suitable choice.
