Ruifa Modular House
Ruifa Modular House
Designed to achieve thermal balance, high wind resistance, and structural longevity, these top architectural configurations are optimized for heavy-use coastal operations.
Busan, as the primary maritime gateway of South Korea and one of the busiest container hub ports in the world, functions in a landscape defined by rapid logistics, industrial zoning expansions, and harsh oceanic environments. The ongoing megaprojects like the Gadeokdo New Airport and the Busan New Port Phase 2 development demand ultra-fast construction timelines.
Traditional concrete or heavy-steel structures present prolonged mobilization times and high carbon outputs. Our EPS (Expanded Polystyrene) sandwich panel prefabricated buildings directly resolve these bottlenecks. They offer excellent thermal barriers against humid coastal summers and chilly marine winters, while maintaining structural resistance to saline moisture and high wind loads typical of the Tsushima Strait passage.
The global modular building market is rapidly shifting toward off-site construction, driven by ESG mandates and rising urban density. Discover how we balance eco-friendly components with modern structural integrity.
Our manufacturing pipeline leverages fire-retardant Expanded Polystyrene (EPS) density variants from 12 kg/m³ up to 24 kg/m³. By compounding the polymer matrix with specialized fire suppressants, our panels meet rigorous international classifications, limiting vertical flame spread and combustion gas toxicity.
Combined with a double-sided structural envelope made of hot-dip galvanized steel (PPGI/PPGL), these systems form a structural composite. We apply a dual-component polyurethane adhesive under high-pressure lamination, ensuring a bond strength that prevents core-to-skin delamination over a 30-year design life cycle.
| Engineering Property | Standard Specs | High-Density Option |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.038 W/m·K | ≤ 0.033 W/m·K |
| EPS Core Density | 15 - 18 kg/m³ | 20 - 24 kg/m³ |
| Steel Sheet Thickness | 0.4 mm - 0.5 mm | 0.6 mm - 0.8 mm |
| Fire Resistance Rating | Class B2 (Flame Retardant) | Class B1 (Hard-to-burn) |
| Sound Transmission Class (STC) | ~ 26 dB | ~ 32 dB |
As one of the most professional prefabricated house manufacturers in south-east China, we provide customers with all kinds of integrated housing solutions. The company has a complete new modular housing R&D system, technology system, manufacturing system and operation and maintenance system. Now it has a full set of production facilities such as small parts.
Sourcing high-tensile structural steel and grade-A flame-retardant EPS beads for density calibration.
Automated high-speed saws profile steel framing members down to sub-millimeter tolerances.
Heavy-duty MIG/TIG welding processes create robust modular structural nodes.
Initial zinc-rich epoxy priming layer prevents under-film corrosion in coastal regions.
Application of polyurethane midcoat increases frame impermeability and chemical resistance.
Topcoat weather-seal application adds dynamic UV deflection and color fastness.
Complete assemblies undergo dimensional audits, stress tests, and final packaging.
High-precision cold roll forming creates exact floor joists and load-bearing studs.
Heavy hydraulic folding machines shape flashings, corners, and customized profiles.
Corrugates prepainted steel to yield optimized structural profiles for roof panels.
Custom profiling molds structural ribs into panels to support heavier loads.
High-capacity hydraulic shear stations cut structural plates cleanly, eliminating burrs.
Programmable robotic welding ensures perfect weld seam repeatability across bulk orders.
CNC profile cutting optimizes sheet layouts to reduce metal waste.
Precision secondary welding of connections and brackets by certified welders.
Electrostatic coating ensures uniform paint thickness and optimal weathering.
Pre-punching bolt connection holes ensures quick assembly during modular erection.
Continuous thermal pressing bonds EPS core blocks to steel skins under monitored pressure.
Busan's high humidity, combined with rapid temperature transitions in spring and autumn, creates condensation risks inside thin-walled modular structures. Our engineering division resolves this by integrating double-tongue-and-groove joint geometry along panel edges. This tight mechanical interlock, sealed with expanding non-biodegradable EPDM gaskets, blocks drafts and vapor intrusion.
Furthermore, our R&D focus includes transitioning to carbon-infused EPS core compounds (commonly known as Graphite EPS or Neopor). This material reduces heat transfer via radiation, boosting thermal efficiency by up to 20% compared to standard white EPS at identical densities.
Get technical answers to common questions about deploying EPS sandwich panel buildings in high-salinity and marine environments.
Explore our complete catalog of modular structures, including foldable workspace units and luxury light steel villas, all customizable to match localized terrain and environmental parameters.
Partner with an established manufacturer to design custom modular solutions that meet Korean energy saving standards, coastal structural demands, and your specific timeline.
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