Engineered to international building codes (ASTM, JIS, EN, BIS, SASO). Browse our primary export lines with custom core densities, tailored profile geometries, and high-durability surface coatings.
Heavy-duty insulated polyurethane core panels with thermal break seals, designed for automated warehouse loading docks and industrial bays.
High-tensile zinc and aluzinc coated corrugated profiles with PVDF/SMP finishes, providing superior weather and UV protection for insulated roofs.
B1 fire-rated rigid polyurethane/PIR foam core with embossed metal carved skins, offering R-values up to R-35 for warehouses and cold storage.
Modular pre-engineered steel structure integrated with high-performance roof purlins designed for continuous insulated panel mounting.
Cross-linked polyethylene (XPE) closed-cell foam providing acoustic dampening, vapor retardance, and zero moisture absorption under metal decks.
Premium color-coated galvanized coils tailored for continuous roll-forming sandwich panel facings, compliant with Middle East and South Asian standards.
55% Aluminum-Zinc alloy coated sheet offering exceptional thermal reflectance and 4x corrosion resistance over standard galvanized substrates.
Prefabricated container envelope built with high-density rock wool and EPS insulated roof panels, engineered for rapid commercial deployment.
In modern industrial facilities, cold storage hubs, and pre-engineered buildings (PEBs), roof insulation is the frontline barrier against solar irradiance and conductive heat flux. Selecting the appropriate core specification determines building operational carbon, condensation risk, and structural fire ratings.
| Insulation Core Type | Thermal Conductivity (λ) | Standard Core Density | Fire Classification | Moisture Vapor Permeability | Compressive Strength (10% Def) | Optimal Project Application |
|---|---|---|---|---|---|---|
| Rigid PU / PIR Foam | 0.019 – 0.023 W/m·K | 38 – 42 kg/m³ | < 2.5% Vol (High Resistance) | ≥ 150 – 220 kPa | Cold Storage, Deep Freeze, Agro-Processing | |
| Basalt Rock Wool (Mineral) | 0.034 – 0.040 W/m·K | 100 – 140 kg/m³ | High (Requires Vapor Retarder) | ≥ 80 – 120 kPa | Chemical Plants, Commercial Malls, High Fire Hazard | |
| Expanded Polystyrene (EPS) | 0.033 – 0.038 W/m·K | 16 – 24 kg/m³ | Moderate (3.0 – 5.0%) | ≥ 80 – 100 kPa | General Logistics Sheds, Rooftop Houses, Modular Camps | |
| Closed-Cell XPE Foam | 0.032 – 0.036 W/m·K | 28 – 33 kg/m³ | < 0.01 g/m²·24h (Impermeable) | Flexible / Shock Absorbent | Under-deck Underlayment, Acoustic Lining, Cleanrooms |
Standard through-fastened corrugated roofs lose up to 35% of their designed thermal performance via fastener thermal bridges and purlin contact. Our continuous tongue-and-groove jointing and concealed-fastener standing seam profiles eliminate continuous metal pathways, stabilizing overall building envelope U-values down to 0.16 W/m²·K.
Where NFPA 285 or EN 13501-1 standards govern industrial facilities, our 120 kg/m³ basalt rock wool cores provide up to 240 minutes of structural fire integrity without releasing toxic hydrogen cyanide or toxic smoke particulates, ensuring life safety compliance in heavy manufacturing zones.
In humid tropical and sub-tropical environments, vapor pressure drives moisture outward-in during cooling seasons. By combining factory-bonded 0.5mm Aluzinc facing with continuous non-hygroscopic polyurethane cores, our panels prevent water vapor reaching internal dew points, eliminating rot, corrosion, and biological mold growth.
Joint Star Steel Structure Ltd. was founded in Dhaka in 2010 under the operational mission "Your Future in Your Home." As an early pioneer in industrial steel construction and insulated composite panels, we remove the multi-tier subcontractor gap by manufacturing primary structural steel, cold-formed purlins, and sandwich panels under a unified ISO-certified manufacturing protocol.
From architectural structural calculation and steel fabrication to automated continuous panel lamination and specialized erection, all contracts are managed internally with single-point accountability.
Every batch of prepainted galvanized steel (PPGI) and Aluzinc/Galvalume coil conforms strictly to ASTM A792, JIS G3321, BIS, and SASO certification standards, offering AZ150 protective coatings resistant to coastal saline air.
Panels and structural members are color-coded, CNC-labeled with piece marks, and packaged with vapor-sealed protective films and reinforced edge-guards for zero-damage intermodal ocean transport.
Global supply chain managers face shifting regulatory frameworks, rising carbon taxation (CBAM), and increasing climate volatility. The commercial procurement landscape for roof insulation materials is evolving across four distinct technological vectors.
Procurement specifications in North America and the EU now mandate hydrofluoroolefin (HFO) or cyclopentane blowing agents with Global Warming Potentials (GWP) < 1 and Zero Ozone Depletion Potential (ODP), cutting Scope 3 embodied carbon while maintaining high aged thermal resistance.
Next-generation insulated sandwich roof profiles are increasingly manufactured with pre-formed structural ribs and standing seam clips engineered specifically to accept frameless Building Integrated Photovoltaic (BIPV) arrays without drilling into the core envelope.
Procurement processes have transitioned from static 2D schedules to LOD 400 Building Information Modeling (BIM). OEM panels are roll-formed and cut to length based on direct CAD-to-line datasets, reducing site waste from typical 8% down to under 0.5%.
Roof surfaces are moving from standard polyester to Polyvinylidene Fluoride (PVDF 70/30) and solar-reflective "Cool Roof" resins with a Solar Reflectance Index (SRI) exceeding 82, reducing surface temperatures by up to 28°C in desert and tropical climates.
Direct technical answers addressing structural integration, fire regulations, container packaging, and material selection for project developers and purchasing heads.
Send our senior engineering team your structural layouts, required core material, or project BOQ. We provide detailed CAD submittals, thermal performance calculations, and competitive FOB/CIF export pricing within 24 hours.