Export Inventory Portfolio
Featured Aluminium Cottage Pane & Architectural Fenestration Systems
Cottage pane windows—historically designated by divided multi-light glazing grids—have evolved from vulnerable single-glazed timber and mild-steel frames into precision-engineered, thermally broken aluminium architectural envelopes. DERCHI manufactures custom true-divided-lite (TDL) and simulated-divided-lite (SDL) systems engineered with virgin 6063-T6/T5 aluminium profiles, internal multipoint locking gearing, and argon-filled double or triple Low-E glazing.
Precision Manufacturing Authority
Why Global Developers Partner with DERCHI Windows & Doors
As a leading architectural manufacturer operating out of Foshan, Guangdong—the world capital of aluminium extrusion—Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) represents Chinese fenestration engineering excellence. Recognized among the Top 10 premium window and door brands in China, we control the entire vertical supply chain from billet casting, die extrusion, and thermal bridging to computerized automated glass lamination and pre-assembly testing.
AS2047 & CE Certified
Tested to AS2047 N6 cyclonic wind resistance, water penetration pressures exceeding 450Pa, CE EN14351-1, and ISO9001 compliance, providing effortless clearance with local building inspectors.
Custom CAD Shop Drawings
Every order is fully tailored to architectural schedules. Our internal engineering department generates full 1:1 scale shop drawings, wind load calculations, and section elevations free of charge.
Export Packing Standards
Frames and glass units are crated in individual non-fumigation treated solid plywood crates with interior corner foam buffers, desiccants, and vacuum shrink film, preventing maritime salt-fog degradation.
Consolidated Sourcing
Combine cottage pane windows with matched entrance pivot doors, cast aluminium villa gates, and heavy-duty patio sliders in single 40ft HQ sea containers to minimize project freight overheads.
Technical Engineering White Paper
Engineering Modern Aluminium Cottage Pane Systems: TDL vs. SDL Architecture
Specifiers face a pivotal technical balance between authentic historical heritage and strict contemporary thermal efficiency mandates. The conventional approach using steel T-bars and putty-glazed panes suffered from high thermal bridging, recurring air infiltration, and corrosion failure. DERCHI eliminates these structural flaws via modern extrusion metallurgy and advanced glazing sealants.
Glazing Mechanics
True Divided Lite (TDL)
Each grid opening holds an individually cut insulated glass unit (IGU). While offering architectural authenticity, TDL increases cumulative perimeter seal failure points. DERCHI resolves this using robotic secondary structural silicone edge seals with warm-edge spacers for each lite.
Thermal Optimization
Simulated Divided Lite (SDL)
The dominant specification for commercial and luxury villa envelopes. Employs a single continuous double or triple IGU, fitted with CNC-milled exterior and interior aluminium muntin grids, combined with internal shadow spacer bars for a clean divided aesthetic without thermal penalties.
Profile Metallurgy
Alloy 6063-T6 & Finishes
Profiles feature a minimum 1.6mm to 2.2mm structural wall thickness. Finishes include Qualicoat Class 2 architectural powder coatings (25-year gloss retention) and high-durability fluorocarbon (PVDF) coatings engineered for high-saline maritime atmospheres.
| Performance Metric | Legacy Mild Steel Windows | Standard Non-Break Aluminium | DERCHI Thermal Break Cottage Pane |
|---|---|---|---|
| U-Factor (Thermal Transmittance) | 5.8 - 6.2 W/m²·K (Extreme heat gain/loss) | 3.8 - 4.5 W/m²·K (Poor insulation) | 1.4 - 1.8 W/m²·K (Complies with LEED/NZEC) |
| Air Infiltration (ASTM E283) | > 1.5 m³/h·m (Draft prone) | 0.8 m³/h·m | < 0.1 m³/h·m (Continuous co-extruded EPDM) |
| Acoustic Attenuation (Rw / STC) | 22 - 25 dB (Single float glass) | 28 - 30 dB (Standard IGU) | 36 - 44 dB (Asymmetric laminated glass) |
| Corrosion & UV Lifespan | Periodic wire brushing & repainting | Chalking & pitting within 8-10 years | 30+ Years (AAMA 2605 / Qualicoat Seaside) |
Industry Outlook
Future Procurement & Technology Trends in Aluminium Fenestration
Wholesale procurement directors and developers must anticipate evolving compliance requirements across international supply chains. Over the next decade, fenestration choices will increasingly rely on decarbonized smelting, smart home building automation, and resilient cyclone mitigation.
Low-Carbon Circular Aluminium
Global mandates such as the European CBAM (Carbon Border Adjustment Mechanism) are accelerating the demand for low-carbon primary billets smelted using renewable hydro energy. DERCHI provides traceable Environmental Product Declarations (EPDs) for high-tier sustainable project certifications.
Smart Actuation & Concealed Hardware
Traditional visible cottage pane casement pegs and stays are transitioning to fully concealed multi-axis hinges and integrated 24V linear sash actuators linked to building management systems (BMS), weather stations, and smart home ecosystems.
Direct Factory-to-Site Modular Logistics
To circumvent distributor markups and regional labour shortages, tier-1 developers are bypassing traditional intermediaries. Importers leverage factory-direct precision assembly where windows arrive pre-hung, pre-glazed, and barcoded for direct floor-level installation.
Procurement Intelligence
Frequently Asked Technical & Sourcing Questions
Clear, actionable answers addressing engineering constraints, shipping dynamics, and import protocols for trade professionals.
How do you clean glass around Simulated Divided Lite (SDL) cottage bars?
Unlike old separate putty frames, DERCHI SDL grids use precision-milled sloped aluminium muntin profiles adhered with industrial-grade 3M VHB acrylic foam tape and perimeter structural silicone beads. This prevents water dirt accumulation, enabling rapid squeegee washing across continuous glazing faces.
What is the standard production and shipping lead time for custom container orders?
CAD shop drawings are finalized within 3-5 working days. Production runs typically span 25-35 days from deposit and drawing sign-off. Transit by sea from Shenzhen or Guangzhou to African, European, or North American ports adds 20-38 days depending on direct route routing.
Can you manufacture cottage pane windows for high-saline coastal climates?
Yes. We specify AAMA 2605-compliant fluorocarbon (PVDF) 3-coat spray finishes or 25-micron hard-anodized coatings, alongside Marine Grade 316 stainless steel friction hinges, multipoint shoot-bolts, and dual hollow-bulb EPDM perimeter seals that resist salt-fog pitting.
What documentation do you provide for customs and building authority sign-offs?
We supply comprehensive documentation packages including Certificate of Origin (Form E/CO), accredited lab test reports for wind/water/air pressures (AS2047, CE EN14351), NFRC thermal performance data sheets, glass safety tempering certificates, and commercial invoices/packing lists.
Do you support mixed loads containing doors, windows, and gates?
Yes. One of DERCHI’s primary strategic strengths is full architectural fenestration consolidation. You can combine custom cottage pane casements, sliding patio doors, cast aluminium entry doors, pivot gates, and interior doors in one container, backed by 3D container loading optimization.
How do you guarantee dimensional accuracy on custom architectural projects?
Nothing enters fabrication without client-approved 2D/3D CAD shop drawings. Frames are fabricated on German 4-axis and 5-axis CNC machining centers, followed by dry-assembly calibration checks to maintain tight corner tolerance limits within ±0.5mm across all structural axes.
