50mm exterior thermal rockwool wall sandwich panel
It's one classic sandwich panel type in steel structure industry.A1 level fireproof performance.MOQ:500M²/Color & Size
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CustomizedProduct Introduction
Fireproof Steel Rock Wool Sandwich Panel
This panel uses two layers of pre galvanized steel sheet as the face material. The core is high density rock wool. It achieves an A2 fireproof rating. The rock wool provides excellent thermal insulation and sound absorption. The steel sheets add structural strength. This panel is ideal for industrial walls, clean room partitions, and warehouse roofs. It prevents fire spread and controls temperature effectively.
Product Specification
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Specification |
Details |
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Panel Thickness |
50mm, 75mm, 100mm, 120mm, 150mm, 200mm |
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Panel Width |
1000mm (standard), 950mm, 600mm (optional) |
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Panel Length |
2000mm–12000mm (custom) |
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Steel Facings |
Pre painted galvanized steel / color coated steel |
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Steel Thickness |
0.4mm–0.8mm (both sides) |
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Core Material |
Rock wool (stone wool) |
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Density |
80–160kg/m³ |
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Thermal Conductivity (λ) |
≤ 0.040 W/(m·K) |
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Fire Rating |
A1 – A2 (non-combustible) |
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Sound Absorption Coefficient (NRC) |
0.85 – 0.95 |
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Sound Reduction Index (Rw) |
30 – 45 dB (depending on thickness) |
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Melting Point |
> 1000°C |
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Water Vapor Permeability (μ) |
1 (no capillary effect) |
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Joint System |
Steel tongue-and-groove / concealed fastener |
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Compressive Strength |
(10% deformation) ≥ 40 kPa |
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Application Temperature |
-40°C to +200°C |
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Applications |
Warehouses, workshops, industrial plants, logistics centers, commercial roofs, partition walls, fire-rated enclosures |
Sandwich Panels Overlapping Method


Wall and Roof System
Loading Method for Rock Wool Sandwich Panel
☆Container selection
20ft or 40ft high cube containers are typically used. 40ft containers are preferred for longer panels up to 11.8 meters.
☆Bottom protection
Plywood sheets or corrugated cardboard are placed on the container floor before loading to prevent moisture contact and steel damage.
☆Final check
The container door must close fully without forcing. Any gap at the door is filled with foam padding or additional dunnage bags.
Service
Comprehensive Construction Solutions for Modern Infrastructure
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Precision Material Fabrication |
Custom Structural Design |
Project Management & Installation |
Technical Consultation & Support |
Yumisteel is a comprehensive construction solution provider dedicated to driving innovation in the construction industry. We offer clients intelligent, durable, and cost-effective solutions, covering every stage from initial design to final installation.
We are not just construction material suppliers; we are your strategic engineering partners who solve complex structural challenges. We integrate advanced manufacturing technology, rigorous quality control, and expert project coordination to deliver robust, reliable, and sustainable steel structures.
FAQ
1. Are you a factory?
Yes, we have our own factory with multiple production lines for steel structures, pipe trusses, grid structures, light steel and heavy steel products. And our company also has more than 30 senior design and technical talents, including senior engineers, registered constructor, and engineers.
2.How can you control the quality?
Our strict quality control measures are in place throughout the entire process from material procurement, processing and manufacturing to product transportation. Advanced equipment is used in the processing process, and strict production operation plan management is implemented for the production and manufacturing process to ensure the schedule and quality of projects.
3.How can you guarantee the price you offering is the best one?
We are professional steel structure supplier and can provide the best design for you which will save you money with the good quality.
4.Can you offer a device service?
Yes, we have a excellent design team. We can design full solution drawings as per your requirements.
5. Do you offer installation service?
Yes, we can provide both online or on-site installation guide or send an professional installation team to your place.
online service
+86-592-6095031
manager@yumisteel.com
Alina_Yuki
+8613559086380
+8615860744964