Color Steel Rock Wool Sandwich Panel | Fireproof & Insulated Building Enclosure Panel
1. Product Overview
Color Steel Rock Wool Sandwich Panel is a prefabricated integrated enclosure material specially designed for steel structure buildings. Manufactured in full compliance with GB/T 23932 national standard for building thermal insulation sandwich panels, the product consists of double-layer color-coated metal sheets and diversified functional thermal insulation core materials (rock wool, glass wool, PU and EPS optional). Adopting high-pressure composite and high-temperature integral bonding technology, it forms a stable tongue-and-groove interlocking structure. Integrating thermal insulation, fire resistance, waterproofing, sound insulation and lightweight load-bearing performance, the panel features high structural integrity, excellent airtightness and extremely convenient installation. It is widely applied for roofing systems, exterior wall cladding and internal partition walls of industrial plants, cleanrooms, constant-temperature workshops and temporary buildings, serving as a high-standard, fire-safe and fast-installation building enclosure solution for modern construction projects.
2. Core Structural Composition
Metal Surface Sheet
Fabricated from high-quality galvanized or aluzinc color-coated steel sheets with precision roll forming. Substrate grades include DC51D and S250GD, matched with PE, HDP and PVDF weather-resistant coating systems. The surface features excellent acid and alkali resistance, UV stability and anti-ageing performance, effectively resisting fading, peeling and corrosion to ensure long-term outdoor durability.
Functional Insulation Core
Multiple core materials are available to match different fire rating and functional requirements. Rock wool and glass wool provide Grade A non-combustible performance; PU polyurethane offers B1 grade flame retardancy with superior thermal insulation; EPS foam delivers cost-effective basic thermal insulation. The product portfolio fully covers high fireproof, constant-temperature and economical conventional application scenarios.
Precision Tongue-and-Groove Connection Structure
Adopts standard male-female lap joint design for tight seamless assembly. The optimized interlocking structure effectively prevents air leakage, water seepage and thermal bridging loss, ensuring outstanding building airtightness, watertightness and overall thermal insulation performance.
3. Main Product Types (By Core Material)
PU Polyurethane Sandwich Panel – Special Cold Storage Grade
Features high-density closed-cell structure with a closed-cell rate above 90%. It delivers ultra-low water absorption, superior thermal insulation, lightweight texture and high compressive strength. With B1 flame-retardant grade, it is the optimal choice for cold storage rooms, constant-temperature workshops, high-standard factory buildings and premium prefabricated buildings that require strict thermal insulation and moisture-proof performance.
Rock Wool Sandwich Panel
Equipped with Grade A non-combustible rock wool core, featuring excellent high-temperature resistance and flame retardant performance. The composite structure provides high compressive rigidity and superior sound insulation capacity, fully meeting national building fire acceptance standards. Ideal for high fire-risk industrial factories, warehouses, office buildings, fixed fire partitions, independent fire compartments and fire passage enclosure walls.
Glass Wool Sandwich Panel
Grade A non-combustible with porous fiber structure, delivering outstanding sound absorption and noise reduction effects. It is lightweight, cost-effective and thermally stable under temperature fluctuations. Widely used for equipment rooms, soundproof workshop enclosures, large-span steel structure wall cladding and outdoor noise barrier projects.
EPS Polystyrene Sandwich Panel
An economical enclosure solution with stable basic thermal insulation performance and competitive cost. Class B3 combustible grade, not applicable for fire-rated engineering. Mainly used for temporary site accommodation, simple warehouses, construction hoardings and ordinary indoor partition walls.
4. Standard Specifications & Technical Data
Execution Standard: GB/T 23932
Available Thickness: 50mm, 75mm, 100mm, 150mm, 200mm
Standard Effective Width: 950mm, 1150mm
Steel Sheet Thickness: 0.25mm–0.6mm (customizable)
Substrate & Coating Option: DC51D / S250GD galvanized & aluzinc substrate; PE / HDP / PVDF weather-resistant coating
Custom Length: Max standard length 12m (oversized length available with special transportation arrangement)
Profile Type: Flat wall panel, corrugated roof panel, hidden-fastener roof panel
Uniform Load Capacity: ≥1.5kN/㎡ (roofing system)
Thermal Conductivity: Rock wool ≤0.046 W/(m·K), Glass wool ≤0.043 W/(m·K), PU ≤0.024 W/(m·K), EPS ≤0.041 W/(m·K)
Fire Rating: Rock wool / Glass wool – Grade A Non-combustible; PU – Grade B1 Flame-retardant; EPS – Grade B3 Combustible
5. Core Product Advantages
Excellent Thermal Insulation & Lightweight Design
All core materials feature low thermal conductivity and stable energy-saving performance. The overall lightweight structure reduces building dead load by more than 30%, effectively lowering foundation construction cost while maintaining flat and deformation-free surface finish.
Grade A Fire Safety & Full Code Compliance
Rock wool and glass wool core panels meet GB 8624 Grade A non-combustible standard, featuring low smoke, non-toxic and flame retardant properties. They effectively block fire spreading and heat transmission, ensuring high pass rate for official fire inspection of high-standard fireproof projects.
Porous Sound Absorption & Efficient Noise Reduction
The natural porous fiber structure absorbs and isolates airborne noise efficiently, reducing indoor and outdoor sound transmission. It greatly improves acoustic environment for industrial workshops, mechanical equipment rooms and commercial buildings.
Precision Tongue-and-Groove Sealing & Zero Water Penetration
Optimized male-female interlocking structure, matched with hidden-fastener roof installation system, ensures tight joint closure. It completely eliminates water seepage and air infiltration, delivering long-term stable waterproof and thermal insulation performance for building envelopes.
Superior Weather & Corrosion Resistance
Premium color-coated steel surface resists acid, alkali, ultraviolet radiation and ageing. It adapts to open-air exposure and industrial corrosive environments, achieving a service life of 15–30 years under standard operating conditions.
Full Prefabrication & Ultra-fast Construction
Fully prefabricated in factory with integrated forming. On-site construction only requires assembly and fixation, eliminating traditional plastering, bricklaying and secondary insulation & waterproof treatment. It shortens project construction cycle by over 50%.
6. Application Scenarios
Industrial Steel Buildings: Exterior wall cladding and roof enclosure for steel structure factories and logistics warehouses.
Temporary Construction Projects: Prefabricated site houses, staff dormitories and temporary office buildings.
Clean & Constant-temperature Engineering: Cleanrooms, hospital operating rooms, cold storage banks, constant-temperature warehouses and agricultural thermal insulation sheds.
Public & Commercial Buildings: Decorative and thermal insulation wall & ceiling panels for office buildings, shopping malls and stadiums.
Fire Partition Engineering: Workshop partition walls, building fire separation belts, independent fire compartments and fire passage enclosure walls.
7. Standard Installation Method
The panel adopts standardized tongue-and-groove interlocking assembly with professional fixing and integrated detailed processing, requiring no secondary surface treatment.
Wall Panel Installation: After tight tongue-and-groove joint closure, fix panels on steel purlins with self-tapping screws at a maximum spacing of 300mm to ensure flat and stable overall wall surface.
Roof Panel Installation: Adopt hidden-fastener roofing system with concealed fixing under panel ribs, realizing screw-free exterior surface. Special weather-resistant sealant is applied at all overlapping joints to enhance waterproof performance and overall aesthetics.
Detailed Edge Processing: Custom matching edge trims are installed for eaves, ridges, gables and internal & external corners to achieve full airtight, watertight and heat-insulating enclosure effect.
On-site Cutting Protection: On-site cutting is performed with electric saw or plasma equipment. All cut sections are coated with anti-rust paint to prevent corrosion damage and extend panel service life.
8. Product Summary
Color Steel Rock Wool Sandwich Panel covers four mainstream core options: rock wool, glass wool, PU and EPS. As multi-functional prefabricated building envelope materials, it integrates fire resistance, thermal insulation, sound insulation, waterproofing and anti-corrosion performance. Manufactured strictly in accordance with GB/T 23932 national standard, the series features complete specifications and wide scenario adaptability. With reliable Grade A fire safety, low thermal conductivity, outstanding weather resistance and fast prefabricated installation, these panels serve as cost-effective, code-compliant and high-efficiency enclosure solutions, widely used in modern industrial, cleanroom, constant-temperature, temporary and fire partition steel structure projects.
To learn more about the selection of fireproof and thermal insulation materials for steel structures, read our professional guide:Waterproof & Insulation Material Selection Guide
