Commercial Grade
Commercial Waterproof Casement Doors & Windows
Weather-resistant, easy-maintenance system optimized for commercial structures with multi-chamber gaskets.
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Catalog Overview
Featured Architectural Fenestration Systems
Precision-extruded, structurally sound, and fully compliant with EN 14351-1 CE marking standards, NFRC, and AS2047 protocols.
Export Grade
Reflective Glass Aluminum Alloy Windows (Tariff Compliant)
Engineered reflective solar-control glass profiles configured for straightforward import and streamlined customs clearance.
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Acoustic & Thermal
VS167 Heavy Duty Thermal Break Soundproof Sliding Door
Double-glazed soundproof construction engineered for expansive openings, high wind-load ratings, and smooth operation.
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Certified Fenestration
Double Glazed Sliding Windows with Integrated Fly Screens
Multi-certified to AS2047, CE, and NFRC criteria. Robust drainage sill tracks and heavy-duty insect mesh integration.
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Custom Engineering
Engineered Architectural Custom Aluminum Windows & Doors
Tailored structural profiles, powder-coated or PVDF coatings, customized to architectural blueprints and CAD criteria.
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Energy Efficient
Tilt & Turn Energy-Saving Low-E Double Glazed Windows
European tilt-turn hardware integration, dual sealing perimeters, and integrated louvers for variable ventilation.
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Panoramic Glazing
Frameless Folding Balcony Curtain Glazing System
Unobstructed visual sightlines, modular track carriers, and impact-resistant glass engineered for balconies and terraces.
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High Thermal Barrier
Thermal Break Double Glazed Architectural Tilt-Turn Windows
Polyamide PA66 thermal barrier with low overall U-values. Multi-point locking system for robust perimeter compression.
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Engineering Whitepaper
CE Certification Framework: EN 14351-1 Technical Mandates
A technical overview for facade procurement directors evaluating European compliance, structural tolerances, and thermal integrity.
Mechanical Wind-Load & Resistance (EN 12210)
Windows exported to the European Union undergo rigorous pressure chamber cycling to determine classes ranging from Class 1 up to Class 5, and frame deflection categories (A, B, C). Our reinforced profiles utilize high-grade 6063-T5 and 6063-T6 aluminum alloys, ensuring maximum structural elasticity and structural recovery up to 3000 Pa test loads.
Water Tightness & Air Permeability (EN 12207 / 12208)
Proper water shedding depends on hydrostatic drainage channels and EPDM weatherstripping gaskets. Under EN 12207 (Air Permeability Class 1 to Class 4) and EN 12208 (Water Tightness 1A through 9A or Exxx), our systems maintain air-barrier containment under driving rain pressures up to 600 Pa, preventing building envelope degradation.
Thermal Transmittance Coefficient (EN ISO 10077-1/2)
U-value optimization dictates fenestration compliance in the European market. By isolating structural extrusions with fiberglass-reinforced polyamide strips (PA66 GF25), total window thermal performance (Uw) is stabilized between 1.1 and 1.6 W/(m²·K), suppressing condensation and limiting building HVAC thermal loss.
| Performance Indicator | Test Standard | Certified Performance Grade | Engineering Impact on Facade Design |
|---|---|---|---|
| Wind Load Resistance | EN 12211 / EN 12210 | Class C3 - C5 (≤ 2400 - 3000 Pa) | Deflection limited to ≤ L/300; prevents frame blow-out in coastal high-rises. |
| Watertightness | EN 1027 / EN 12208 | Class E900 (Up to 900 Pa) | Internal water shedding baffles stop moisture intrusion under heavy monsoon winds. |
| Air Permeability | EN 1026 / EN 12207 | Class 4 (≤ 3 m³/(h·m²) at 100 Pa) | Continuous multi-point compression seals limit HVAC infiltration load. |
| Thermal Transmittance (Uw) | EN ISO 10077-1 | 1.1 – 1.5 W/(m²·K) | Meets European building energy performance standards and ASHRAE 90.1. |
| Acoustic Attenuation (Rw) | EN ISO 717-1 | 35 dB – 44 dB | Multi-layer laminated acoustic PVB/SentryGlas interlayers decouple street noise. |
Strategic Sourcing
Future Sourcing & Industry Trends in Fenestration (2025–2030)
Technological, regulatory, and environmental shifts reshaping global fenestration supply chains.
1. Embedded Carbon Accounting & CBAM
The European Union Carbon Border Adjustment Mechanism (CBAM) is transitioning the procurement criteria of developers toward low-carbon aluminum. Smelters utilizing hydroelectric energy and closed-loop post-consumer aluminum recycling (scrap recovery rates > 75%) are becoming contractual prerequisites, prioritizing low-embodied-emission manufacturers.
2. Ultra-Slim Sightlines with Massive Glazing
Modern architectural design trends demand minimal perimeter framing combined with oversized floor-to-ceiling glass expanses. Fenestration systems are shifting toward concealed frames, flush thresholds, and structural structural-silicone bonding that allows sliding panels weighing up to 500 kg to glide smoothly along micro-engineered stainless-steel rollers.
3. Smart Building Integration (BMS Automation)
Automated fenestration units integrated with Building Management Systems (BMS) are shifting from niche luxury projects to mainstream commercial construction. Motorized multi-point drives, hidden magnetic contact sensors, and automated micro-ventilation cycles allow smart facades to regulate indoor air quality and passive cooling dynamically.
Enterprise Scalability
Why Tier-1 Global Contractors Rely On Our Production Facility
Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) operates one of Foshan's most advanced fenestration manufacturing hubs.
180,000 m²
Production Footprint
Intelligent CNC machining & assembly
1,000,000+ m²
Annual Capacity
Guaranteed volume delivery for mega-projects
100+
Registered Patents
Proprietary 4-Side 6-Point Lock systems
18,000+
Global References
Supplied across 5 continents over 25 years
Precision Zero-Tolerance CNC
Equipped with 5-axis automated profile machining centers that execute milling, drilling, and corner cleating within ±0.2mm precision for leak-free assembly.
Certified Quality Accreditations
Standard production is fully audited under ISO 9001 and verified to CE (Europe), AS2047 (Australia), NFRC & CSA (North America), and Florida Hurricane impact metrics.
Proprietary In-House R&D
Over 30 dedicated fenestration engineers support profile mold development, custom extrusion die engineering, and anti-theft multi-point lock architecture.
Port Proximity & Logistics
Strategically situated in Foshan with seamless direct inland and container-port access (Nansha, Shekou, Yantian), minimizing ocean transit preparation times.
Project Execution
Systematic 8-Step Export & Customization Workflow
How we ensure millimeter-level precision from the design desk to destination port unloading.
Drawing Audit & Analysis
Facade engineers analyze structural layouts, wind loading, and opening dimensions.
R&D Custom Formulation
Selection of thermal break depth, alloy temper, and acoustic/solar glass combinations.
Technical Submittal & BOQ
Complete project pricing breakdown, CAD shop drawings, and static calculations for sign-off.
Detail Freeze & Mockups
Physical sample corner cutouts and hardware finishes approved prior to line changeovers.
Order Scheduling & Deposit
Raw material billets allocated and production timeline registered in ERP tracking.
Site / Dimension Verification
Confirmation of floor-by-floor site conditions to prevent opening interferences.
Intelligent Machining & QC
360-degree quality inspections, pneumatic air/water testing, and protective wrapping.
Export Cradles & Guidance
Reinforced steel/timber crating with container stowage plans and on-site fitting guides.
Procurement FAQ
Frequently Asked Questions by Fenestration Importers
Direct technical answers addressing certifications, customization limits, lead times, and logistical safeguards.
Q1: How does CE marking validation work for project-specific tenders?
Every fenestration batch destined for the European Economic Area comes backed with an official Factory Production Control (FPC) audit log and a Declaration of Performance (DoP) referencing EN 14351-1. We supply notified body test reports proving structural wind load, air tightness, water tightness, and acoustic performance.
Q2: Can profiles be customized to anti-dumping tariff exemptions?
Yes. We manufacture customized, fully assembled fenestration systems tailored with specific regional alloy certifications, distinct assembly criteria, and verified origin documentation that fully align with non-anti-dumping compliance regulations for direct, legal international importation.
Q3: What glass configurations are recommended for harsh coastal climates?
For coastal and typhoon-prone zones, we recommend insulated glass units (IGU) featuring an outer pane of heat-strengthened or tempered Low-E glass, warm-edge stainless-steel spacers, and an inner structural laminated pane utilizing SentryGlas (SG) or heavy-gauge PVB interlayers to resist airborne projectile impacts.
Q4: How does DERCHI prevent oxidation during ocean shipment?
Aluminum frames receive specialized Qualicoat Class 2 powder coating or fluorocarbon (PVDF) finishes exceeding 260°C curing requirements. Finished products are enveloped in non-marking protective films, cushioned with desiccant-infused vapor-barrier packaging, and crated in fumigated fumigation-free wooden cases.
Q5: What are your standard minimum order quantities (MOQ) and production lead times?
While standard profile configurations support flexible minimums for pilot villa projects (typically starting at 50 m²), full architectural runs generally yield the greatest freight efficiency at full container loads (20GP / 40HQ). Standard production spans 25 to 35 days post shop-drawing confirmation.
Q6: Do you provide installation schematics and technical submittals for consultants?
Yes. Our in-house engineering group produces full submittal packages including shop drawings (AutoCAD/Revit BIM files), structural anchor load calculations, perimeter perimeter sealant recommendations, and comprehensive step-by-step installation manuals for local field crews.