Expandable Prefab House with 10-Minute Assembly 75mm EPS Sandwich Walls and 5,000 Hours Salt Spray Testing

The expandable prefab house with metal carved panels redefines efficient, durable, and aesthetically versatile housing for diverse needs. Available in five sizes from 7×20ft (14㎡) to 19×20ft (38㎡), it balances compact shipping with spacious living, featuring configurable layouts from open-plan studios to 4-bedroom family units. Its standout 10-minute assembly process—achieved via a fold-out steel frame system requiring just four workers—eliminates weeks of traditional construction, making it ideal for emergency housing, remote mining camps, or boutique glamping resorts.

Built for longevity, the galvanized steel frame undergoes electrostatic spray coating for superior corrosion resistance, while 75mm EPS sandwich walls with metal carved exteriors blend durability with visual appeal. These panels, available in custom RAL colors and textures like wood grain or geometric patterns, withstand 5,000 hours of salt spray testing, suiting coastal environments. The structure integrates high-performance insulation: rock wool (A1-class fireproof) in walls and 50mm EPS roof panels deliver a U-value of 0.28 W/(㎡·K), maintaining comfortable interiors in -15°C to 45°C climates and reducing energy costs by 40%.

Practical design optimizes every inch, with the popular 19×20ft model offering 85% usable space. It includes an L-shaped kitchen with 304 stainless steel fixtures, a dry-wet bathroom with frosted glass shower, and 930×930mm broken-bridge aluminum windows (5mm+12A+5mm double glazing) that block 35dB of noise. The flooring system—18mm fireproof magnesium oxide board topped with 4mm SPC vinyl—boasts 12,000+ abrasion cycles and waterproof properties, ideal for high-traffic areas.