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Sandwich panels for steel structure roofs are prefabricated composite systems designed to balance thermal efficiency, structural integrity, and installation speed. Comprising two outer metal skins (galvanized steel or aluminum) bonded to an insulating core, they form a lightweight yet robust roofing solution. Here’s a detailed breakdown:
1. Outer Skins: Top sheets: Painted with PVDF, SMP, PE or HDP coatings with Rib or Corrugated type. Bottom sheets: Smooth-finished flat for interior aesthetics.
2. Core Materials: Polyurethane (PUR/PIR): High thermal insulation (λ ≤ 0.022 W/mK), ideal for energy-efficient roofs. Rockwool: Non-combustible, fire-rated (up to 120 minutes), and sound-absorbing. EPS/XPS: Cost-effective insulation for low-load applications.
3. Thermal Performance: U-values as low as 0.2 W/m²K reduce heat loss/gain, meeting strict energy codes.
4. Structural Efficiency: Span capacities up to 6 meters (with proper purlin spacing) minimize steel framework needs.
5. Installation Speed: Pre-cut panels with factory-applied seals reduce on-site labor by 40%, ideal for large-scale projects.
6. Fire Safety: Rockwool cores achieve Class A fire ratings, while PUR/PIR options offer flame-retardant formulations.
7. Recyclable steel/aluminum skins reduce environmental impact. Energy-efficient cores lower carbon emissions from heating/cooling.
Sandwich roof panels redefine modern steel construction by merging high-performance insulation, rapid assembly, and long-term durability—essential for projects demanding both functionality and sustainability.
What's rock wool sandwich panels?
Rock wool sandwich panels is one kind of sandwich panels,which is combined by rock wool as core material and two steel sheets on up and down side.Compare to other kind of sandwich panels,the most outstanding features of rock wool insulated panels is fireproof level,which is A1 level.In order to meet customers' requirements,we have different kinds of joint ways for rock wool sandwich panels.
1)Lip type joint way for roof sandwih panels:
Brand of steel plates: | Bao Steel, Yieh Phui Steel, Ma Steel, BHP Steel. |
Painting of steel plates: | PVDF, SMP, HDP, PE; The painting should be above 25μm. |
Galvanized layer of steel plates: | Exterior plate:55% Aluzinc above 100g/m³ or Zinc coating above 150g/m³; Inner plate:55% Aluzinc above 70g/m³ or Zinc coating above 100g/m³. |
Thickness of steel plates: | 0.4mm-0.6mm. |
Thickness of core: | 50mm/75mm/100mm/120mm/150mm. |
Density of core: | 90/100/120kg/m³ |
Effective width: | 950mm |
Panel Length: | According to customers' request |
More Details View:
Fire Safety: Class-A fire resistance with waterproof rockwool core.
Thermal Efficiency: Low thermal conductivity and sealed node design for superior insulation.
Soundproofing: ≥30dB noise reduction to block external interference.
Durability: High strength, wind-pressure resistance via double-support plug design; suitable for load-bearing and exterior use.
Aesthetics: Vibrant colors, hidden-screw design, and diverse styles eliminate extra exterior decoration.
Easy Installation: Flexible and fast, cutting construction time by over 40% vs. traditional methods.
