The global appetite for rapid, cost-effective, and relocatable shelter solutions has propelled the prefab folding house from niche novelty to mainstream construction category. Among the most technically sophisticated offerings in this space is the Double-Wing Folding Room series by Shanghai Cymdin Industrial Co., Ltd. — a manufacturer with over 15 years of factory experience dating back to 2008.
1. What Is a Double-Wing Prefab Folding House?
A double-wing folding house is a factory-built modular unit that ships in a compactly folded configuration and unfolds on-site into a fully habitable space. Unlike single-expansion containers that extend on one side only, the double-wing design deploys two lateral wing panels simultaneously — effectively tripling the usable floor area relative to the transport footprint.
The Cymdin 40-foot variant achieves an expanded floor area of 73 m² from a unit that fits entirely within a single 40-ft high-cube shipping container, making it one of the most space-efficient portable buildings available on the international market.
"The structure is stable and the service life is long. It supports flexible layout, easy installation, and is widely used in construction sites, factories, residences and other scenarios." — Cymdin product page
2. Key Dimensional Specifications
Understanding the size envelope — both folded and expanded — is critical for site planning, transport permitting, and internal space programming. The table below summarises all principal dimensions of the 40-ft double-wing unit.
Table 1 — 40-Ft Double-Wing Folding House: Dimensional Summary
| Dimension Parameter |
Measurement (mm) |
Metric Equivalent |
Notes |
| Expanded external L × W × H |
11,800 × 6,220 × 2,480 |
11.8 m × 6.22 m × 2.48 m |
Full deployed footprint |
| Internal clear dimensions |
11,540 × 6,060 × 2,240 |
11.54 m × 6.06 m × 2.24 m |
Liveable envelope |
| Folded transport size |
11,800 × 2,200 × 2,480 |
11.8 m × 2.2 m × 2.48 m |
Fits 40-ft high-cube container |
| Gross floor area |
73 m² |
Approx. 786 sq ft |
| Container packing |
1 unit per 40-ft HQ container |
Enables bulk-order efficiency |
The 2,240 mm internal ceiling height is a meaningful differentiator: many competing folding units sacrifice headroom to achieve compact transport dimensions, whereas Cymdin's design maintains a near-standard residential ceiling height throughout the expanded envelope.
3. Structural & Technical Features
Rapid Deployment
The wing mechanism allows on-site expansion without heavy lifting equipment — reducing installation time compared with conventional modular assembly.
Reusable & Relocatable
Units can be folded back to transport dimensions and moved to a new site, making them suitable for temporary and semi-permanent programmes alike.
Integrated MEP Systems
Advanced hydropower systems are factory-installed, including electrical, plumbing, and drainage, wired and piped to selected national standards.
Sustainability Options
Designs can incorporate rainwater harvesting and solar hot water systems, reducing long-term operational footprint for off-grid or eco-sensitive sites.
Fire-Compliant Materials
Cymdin units comply with construction codes requiring fire-resistant materials, smoke alarm provision, and adequate egress paths.
Certified Quality
All products carry ISO, CE, and USKA certifications, meeting the import requirements of most major global markets.
4. Interior Space Programming
The 73 m² expanded footprint is designed as a complete, self-contained dwelling unit. The standard configuration accommodates the following functional zones, all of which are customisable at the factory stage:
Table 2 — Standard Interior Zones & Key Features
| Zone |
Standard Inclusions |
Customisation Options |
| Living Area |
Open-plan social space |
Partition walls, built-in storage, smart automation |
| Bedroom |
Dedicated sleeping zone |
Single / double / twin layout; wardrobes; partition screens |
| Bathroom |
Shower, toilet, sink — factory pre-installed |
Tile finish, fixture brand, ventilation fan |
| Kitchen |
Sink, cabinetry, worktop |
Appliance package, layout direction, splashback material |
| MEP Infrastructure |
Electrical, water supply, drainage |
AU / US / CA / FR / UK / NZ / EU wiring standards |
5. Customisation & OEM / ODM Services
Cymdin operates a full OEM and ODM programme, enabling wholesale buyers, developers, and government agencies to specify products that meet precise project requirements. Customisable parameters span the entire building envelope:
Exterior and interior colour palette
Wall, roof, and ceiling panel thickness
Frame material and finish (galvanised steel, powder-coated options)
Door and window type, quantity, and placement
Electrical and plumbing standards aligned to national codes (AU, US, CA, FR, UK, NZ, and broader EU)
Cabinetry, shower pod, toilet, and furniture packages
Unit size: 20 ft, 30 ft, or 40 ft expansion configurations
Optional additions: stairs, terraces, awnings, guardrails, and bespoke roof forms
Buyers with unconventional programme needs — seismic zones, high-wind coastal sites, or extreme cold climates — can work directly with Cymdin's engineering team to adapt structural details accordingly. The company additionally offers a free container co-packing service, combining folding house components with other goods the buyer sources from China to maximise container utilisation.
6. Sector Applications
Table 3 — Commercial & Residential Use Cases
| Sector |
Typical Application |
Key Advantage |
| Construction Sites |
Worker accommodation, site offices, welfare facilities |
Rapid deployment; easy relocation between phases |
| Industrial / Factory |
Guard booths, shift rest rooms, on-site management offices |
Durable structure; expandable as workforce grows |
| Residential |
Guest house, pool house, garden studio, country home |
Full living amenities in a compact, stylish envelope |
| Short-Term Rental |
Holiday cabin, glamping pod, serviced let |
Attractive aesthetics; self-contained utilities |
| Humanitarian & Emergency |
Disaster-relief shelter, field clinic, refugee accommodation |
Ships as standard freight; operational within hours |
| Education & Community |
Classroom, community centre, medical outpost |
Relocatable; scalable by adding units side-by-side |
7. Logistics, Lead Times & Payment
Cymdin dispatches from its factory at No. 66 Caoli Road, Fengjing Town, Jinshan District, Shanghai — a 5,800 m² production facility. Two delivery modes are available, each carrying distinct trade-offs that buyers should weigh carefully.
Table 4 — Delivery Mode Comparison
| Delivery Mode |
Ready to Use on Arrival? |
Typical Container Type |
Best Suited For |
Trade-Off |
| Complete Finished Unit |
Yes — immediate occupancy |
40-ft frame container |
Single-unit buyers; remote sites |
Higher freight cost; 3.2 m width requires special permits |
| Flat-Pack / Modular |
No — professional assembly required |
Standard 40-ft HQ container |
Bulk orders; cost-sensitive projects |
On-site labour and expertise required |
Production & Transit Timeline
Buyers should plan for a 45-day production cycle followed by a 20–35-day sea transit, giving a typical door-to-site lead time of approximately 9–12 weeks. Final timing varies with Chinese public holidays and destination port complexity. For large-volume projects, Cymdin can arrange an on-site installation engineer or connect buyers with regional agents in Europe, the United States, the Middle East, and Australia — at an additional service charge.
Payment Terms
The standard payment structure is T/T (telegraphic transfer) with a 50 % deposit before production commences and the 50 % balance settled before goods are released for shipment. Cymdin also supports DDP (Delivered Duty Paid) arrangements for individual buyers who lack import experience, removing the complexity of customs clearance from the buyer's workflow.
8. About Shanghai Cymdin Industrial Co., Ltd.
Founded in 2008, Cymdin has grown from a specialist booth and security-box manufacturer into a broad-spectrum prefabricated building producer. Its current product catalogue spans:
New Space Capsule House
Apple Cabin
Container House
Modular Building
Circular House
Soundproof Cabin
Double Wing Folding Room
Primary export markets include Australia, New Zealand, Indonesia, Thailand, the United States, the United Kingdom, Canada, and broader Europe. The company's about page details its manufacturing history and certifications, and a live factory virtual-reality walkthrough is accessible via Cymdin's Alibaba storefront.
