Uninsulated single-skin corrugated metal sheets (color tin or galvanized sheets) act as severe thermal conductors under intense tropical and subtropical solar radiation. Under full sun exposure, bare metal surface temperatures regularly exceed 58°C to 65°C, transferring extreme radiant heat into production lines, factory floors, and warehouse facilities.
Joint Star Steel Structure Ltd. delivers engineered heat-proof sandwich panel systems (EPS, PU/PIR, and Rock Wool) specifically manufactured to replace or over-clad conventional corrugated iron. Our factory-laminated composite panels introduce a continuous thermal resistance barrier that eliminates thermal bridges, substantially drops internal ambient temperatures, and dampens persistent rainfall reverberation.
Select the optimal core chemistry and mechanical properties to balance thermal efficiency, fire containment requirements, and overall project budget.
High-density expanded polystyrene offers a lightweight, economical thermal insulation barrier. Most effective for rapid installation on widespread warehouses, industrial sheds, and site offices.
Polyurethane and Polyisocyanurate cores offer the lowest thermal conductivity in the building envelope sector. Essential for cold rooms, pharmaceuticals, and climate-controlled cleanrooms.
Constructed with non-combustible basalt volcanic mineral fiber oriented perpendicular to face sheets. Delivers superior fire stopping up to 120 minutes along with premium acoustic dampening.
| Performance Factor | Standard Corrugated Sheet Roof | Sandwich Panel Roof & Wall System | Procurement Impact |
|---|---|---|---|
| Internal Underside Temperature | 48°C to 65°C under direct solar radiation | 28°C to 33°C (Ambient matched / stabilized) | Prevents worker heat stress & equipment overheating |
| Thermal Transmission (U-Value) | 5.8 - 6.5 W/m²·K (High heat ingress) | 0.28 - 0.52 W/m²·K (Depending on core thickness) | Drastically decreases mechanical cooling energy expense |
| Acoustic Rain Attenuation | 70 to 82 dB (Severe operational disturbance) | 45 to 55 dB (Substantial noise dampening) | Complies with industrial occupational noise thresholds |
| Condensation Risk | Frequent dripping & steel corrosion under humidity | Vapor-tight joint prevents internal dew point condensation | Protects interior machinery, textile inventory, and finishes |
| Structural Dead Weight | 5.0 - 6.5 kg/m² | 9.5 - 13.5 kg/m² (Self-supporting span capability) | Allows wider purlin spacing and rigid composite strength |
In high-capacity manufacturing plants, textile dyeing houses, pharmaceutical processing lines, and logistics warehouses, radiant heat directly compromises worker productivity, increases machinery failure rates, and inflates refrigeration cooling costs.
Eliminates the "oven effect" of corrugated steel ceilings, keeping warehouse floors up to 12°C cooler naturally without constant mechanical conditioning.
Engineered core panels reduce overall building dead weight compared to brick or concrete, minimizing steel tonnage requirements for primary frames.
Tongue-and-groove joint profiles with concealed fasteners prevent water penetration, thermal bridging, and air infiltration along panel perimeters.
Review real project execution across commercial, industrial, and modular structural installations engineered and erected by Joint Star Steel Structure Ltd.
Strict quality control from on-site thermal survey through computer-aided manufacturing and safe erection.
Engineers evaluate structural purlin capacities, solar orientation, wind velocity, and ambient delta to specify panel thickness and skin gauge.
Continuous automated lamination ensures high bonding strength between anti-corrosive PPGI steel skins and high-density insulated cores.
Panels are factory-trimmed to specific bay lengths, edge-protected, pallet-wrapped, and tagged with member identification codes for fast assembly.
Certified riggers execute rapid installation utilizing stainless self-drilling fasteners, butyl sealing gaskets, and formed ridge flashings.
Clear answers regarding procurement, export delivery, installation timelines, and technical certifications.
Single-skin corrugated iron or steel sheeting acts as a direct heat conductor, radiating solar heat into facilities with temperatures reaching up to 60°C on the metal underside. Engineered sandwich panels feature high-density thermal cores (EPS, PU, or Rock Wool) encapsulated between coated steel facings, eliminating thermal bridging and decreasing internal temperature by 8°C to 12°C while reducing sound resonance.
Yes. Joint Star Steel provides both complete replacement cladding and over-cladding systems. Over-cladding installs a continuous insulated layer directly over an existing metal deck using specialized spacer systems, providing full thermal protection without disrupting operations inside the plant.
PU (Polyurethane/PIR) delivers the highest thermal resistance (R-value) per millimeter and is ideal for temperature-sensitive manufacturing, food processing, and cold storage. Rock Wool is chosen where A1 non-combustible fire ratings and acoustic control are required. EPS offers the most lightweight and economical solution for general industrial sheds and commercial facilities.
Sandwich panel heat-proofing systems are engineered to be lightweight, typically ranging from 9.5 kg/m² to 14.5 kg/m² depending on skin gauge and core type. This allows installation on pre-engineered steel frames without exceeding structural purlin deflection limits.
Send your facility dimensions, roofing layout, or thermal specification requirements. Our technical sales team provides custom thermal barrier calculations, bill of quantities (BOQ), and competitive FOB/CFR pricing.
Contact Us