CE · ISO9001
Precision Engineered Portals
Certified Product Systems for the Berlin Architecture Pipeline
Direct-from-manufacturer exterior glazing systems fabricated in our 180,000㎡ smart manufacturing complex. Optimized for high thermal insulation ($U_d \le 0.8\text{–}1.3 \text{ W/(m}^2\text{K)}$), structural stability under wind load, and modern architectural aesthetics.
Anti-Theft · Smart Lock
Aluminum Large Pivot Door Offset Axis Exterior Double Glazed Smart Lock
Technical Details
Rust-Proof · 6063-T6
Powder Coated Aluminum Vertical Slat Modern Residential Front Entrance Gate
Technical Details
Leak-Proof · Sunroom
Factory Direct Aluminum Leak-Proof Stable Door for Garden Sunroom Access
Technical Details
Ultra-Narrow Sightline
Extremely Narrow Stile Folding Glass Door Black Hanging Rail Partition
Technical Details
Panoramic 3-Track
Three Track Six Panel Sliding Glass Door Insect Screen Mesh Panoramic Profile
Technical Details
Commercial Bi-Fold
Commercial Aluminium Bi-Fold Glass Overhead Garage & Storefront System
Technical Details
Soft-Close · Windproof
Windproof Sealed Soft-Close Quiet Aluminum Glass Sliding Entrance Door
Technical Details180,000㎡
Smart Factory Area
Automated CNC extrusion & glazing base
25+
Years Engineering
Top 10 fenestration brand in China
100+
Patents & Certs
CE, ISO9001, AS2047, UL Fire-Rated
600+
Direct Specialists
Engineers, QC auditors & CAD drafters
Berlin Fenestration Baseline: Navigating GEG 2024, DIN EN 14351-1, and CE Marking
The procurement landscape for external glass and aluminium architectural doors within the federal state of Berlin (Land Berlin) and the surrounding metropolitan region of Brandenburg is shaped by stringent structural and environmental directives. Foremost among these is the Gebäudeenergiegesetz (GEG 2024), which mandates rigorous whole-envelope thermal performance benchmarks. External doors installed in residential and commercial premises across Berlin must achieve a maximum overall heat transfer coefficient of Ud ≤ 1.3 W/(m²K), while projects aiming for the coveted KfW-Effizienzhaus 40 or Passive House (Passivhaus) standards necessitate assembly values as low as Ud ≤ 0.8 W/(m²K).
Achieving these strict metrics requires more than standard aluminium fabrication. Commercial and multi-residential projects subject to the Bauordnung für Berlin (BauO Bln) demand verified CE compliance under the harmonized European standard DIN EN 14351-1:2006+A2:2016 (Windows and pedestrian doorsets). As a direct manufacturer, DERCHI provides an unbroken chain of conformity: factory production control (FPC) verified under ISO 9001, third-party accredited laboratory test reports, and factory-issued Declarations of Performance (DoP). This documentation directly addresses the scrutiny of Berlin's municipal building authorities (Bauaufsichtsamt), structural engineers (Prüfstatiker), and general building contractors (Generalübernehmer).
| Performance Criterion | DIN / EN Standard Reference | Berlin Municipal & GEG Requirement | DERCHI Factory Specification | Compliance Status |
|---|---|---|---|---|
| Thermal Transmittance (Ud) | DIN EN ISO 10077-1 / 10077-2 | GEG Baseline: Ud ≤ 1.30 W/(m²K) | Polyamide PA66 GF25 thermal break: 0.82 – 1.18 W/(m²K) | Compliant (GEG / KfW 40) |
| Air Permeability | DIN EN 12207 | Class 3 minimum (Residential) | Class 4 (Highest Rating, airtight multi-chamber EPDM) | Exceeds Norm |
| Water Tightness | DIN EN 12208 | Class 7A / 9A (Wind-driven rain exposure) | Class 9A to E900 (Pressure equalized internal drain slots) | Class E900 Certified |
| Burglar Resistance | DIN EN 1627 to DIN EN 1630 | Police & VdS recommendation: RC2 / RC3 | Multi-point locking, anti-drill plates, P4A/P5A laminated safety glass | RC2 / RC3 Engineered |
| Acoustic Insulation (Rw) | DIN EN ISO 717-1 / DIN 4109 | Rw ≥ 35 dB (Urban S-Bahn & Tram corridors) | Asymmetric acoustic laminated glass: Rw 38 dB – 44 dB | Urban Zone IV Compliant |
Beyond thermal performance, urban developments in Berlin face severe acoustic stress from street-level transit networks, including the BVG U-Bahn, S-Bahn ring tracks, and heavy commercial vehicle arteries in districts such as Mitte, Neukölln, and Friedrichshain. Our factory addresses DIN 4109 acoustic requirements through asymmetric architectural glazing structures (e.g., 6mm tempered outer pane + 16mm Argon cavity + 8.76mm Sound Control PVB laminated inner pane) paired with triple-perimeter, vulcanized co-extruded EPDM gaskets that eliminate sound flanking across door frames.
Urban Morphology
Tailored Applications Across Berlin's Architectural Districts
From heritage Wilhelminian tenement renovations (Altbauten) to high-density smart developments, our custom manufacturing capabilities address Berlin's heterogeneous urban fabric.
Altbau Heritage Facade Retrofits & Courtyard Redevelopments
Wilhelminian-era properties in Charlottenburg, Prenzlauer Berg, and Schöneberg require external doors that respect historic proportion and fenestration lines while delivering high-efficiency thermal envelopes. Our narrow-sightline aluminium systems with bespoke RAL 7016 Anthracite or DB 703 micaceous iron oxide powder coats deliver modern performance without visual disharmony.
Mitte · Charlottenburg · Prenzlauer Berg
High-End Luxury Lakeside Residences & Forest Villas
The secluded lakeside properties along Lake Wannsee, Grunewald, and Potsdam require grand architectural statements. Our oversized aluminium pivot doors (heights up to 3.8 meters, widths up to 2.2 meters) feature concealed German heavy-duty hydraulic hinges, insulated flush panels, offset stainless steel pull bars, and motorized multi-point German hardware integrated with home automation.
Grunewald · Wannsee · Potsdam-Babelsberg
Commercial Hubs, Creative Lofts & Mixed-Use Complexes
For former industrial properties transformed into tech campuses and creative complexes in Friedrichshain, Kreuzberg, and Mediaspree, our heavy-duty bi-folding glass doors and glazed commercial systems offer robust traffic ratings. Tested for 200,000+ mechanical duty cycles, they support smooth indoor-outdoor transitions for public verandas, event venues, and retail entrances.
Kreuzberg · Mediaspree · Europacity
Market Intelligence
Engineering Trends Defining the Berlin Exterior Fenestration Market
Key regulatory evolutions, environmental benchmarks, and hardware technologies impacting commercial specifications across the Berlin-Brandenburg metropolitan region.
1. Low-Carbon Circularity & Environmental Product Declarations (EPD)
Under Berlin's Climate Neutral 2045 roadmap, developers increasingly demand audited life cycle assessments. We utilize virgin-grade 6063-T6 architectural aluminium alloy formulated with traceable scrap recycling streams. Our anodizing and powder coating processes utilize closed-loop wastewater recovery, supporting BREEAM, DGNB, and LEED Platinum certifications for institutional German projects.
2. Integrated Smart Access Control & Barrier-Free DIN 18040-1 Compliance
Modern residential and public projects in Berlin require universal accessibility. Our systems feature zero-clearance, thermally broken flush thresholds (Nullschwellen) engineered with hidden magnetic drainage channels to prevent water ingress. They are fully compatible with biometric access control, NFC relays, and motorized multi-point European locking units.
3. Wind-Load & Water Infiltration Resilience in Brandenburg's Plains
Peripheral development corridors around BER Airport, Schönefeld, and Königs Wusterhausen experience unmitigated gust pressures across open lowland topography. DERCHI exterior systems incorporate reinforced structural mullions that resist deflection pressures up to Class C4/B5 (DIN EN 12210), guaranteeing zero frame distortion or perimeter seal failure during autumnal storm systems.
Guangdong Dejiyoupin: Manufacturing Authority Behind DERCHI
Headquartered in Foshan, China's world-leading precision aluminium extrusion hub, Guangdong Dejiyoupin Doors and Windows Co., Ltd. (brand: DERCHI) operates an expansive 180,000 m² smart production base. With over 25 years of engineering experience and a dedicated workforce of 600+ industry professionals, we rank among the Top 10 premium architectural fenestration manufacturers nationwide.
For German architectural practices and European general contractors, collaborating directly with our Foshan manufacturing facility offers significant technical advantages: comprehensive design freedom via precision 5-axis German CNC profile milling, rapid shop drawing iterations in Revit and AutoCAD, and strict adherence to European performance metrics at competitive direct-from-factory terms.
Precision CNC Multi-Spindle Extrusion Processing
Profiles are milled, tapped, and corner-crimped utilizing high-accuracy automated CNC lines, ensuring tolerance deviations under ±0.2mm for tight, air-leak-free frame assemblies.
Technoform® Polyamide Thermal Barrier Technology
We incorporate multi-chamber PA66 GF25 fiberglass-reinforced polyamide thermal breaks injected with low-density aerogel insulation cores to achieve industry-leading U-values.
Custom Heavy-Duty Export Crating & Protective Packaging
Every single door panel and frame is wrapped in 0.2mm protective PE film, corner-guarded with high-density EVA foam, and crated inside fumigated, moisture-sealed plywood crates compliant with ISPM 15 standards for ocean shipping.
End-to-End Delivery Protocol: From Foshan Production to Berlin Job Site
Importing custom architectural building elements into Germany requires rigorous quality gating, predictable lead times, and seamless logistics coordination. Our cross-border delivery workflow is engineered to eliminate risk for German project managers and estimators:
Phase 01: Schedule Review
Architectural schedule, opening dimensions, wind-load calculations, and local acoustic classes are cross-checked by our engineering desk.
Phase 02: CAD Shop Drawings
Comprehensive 2D/3D fabrication drawings with cross-sections, glass build-ups, and anchoring subframe details are issued for sign-off.
Phase 03: Automated Fabrication
Profiles extruded from 6063-T6 aluminium are processed via CNC equipment, dry-assembled, factory-glazed, and subjected to sealing tests.
Phase 04: Inspection & DoP
Each order receives an EN 10204 3.1 inspection certificate, CE labeling, Declaration of Performance documentation, and HD video audit records.
Phase 05: Transit to Berlin
Consolidated containers are routed via maritime freight to Port of Hamburg / Bremerhaven, clearing German customs and transferring via inland rail/truck directly to your site.
We provide complete FOB, CIF (Hamburg/Bremerhaven), or DAP (Delivered at Place to Berlin project depot) commercial incoterms to fit your procurement requirements.
Knowledge Base
Frequently Asked Questions: Sourcing Exterior Doors for Berlin Projects
Direct technical answers addressing German building code compliance, customs clearance, structural performance, and site installation.
Do your aluminium glass exterior doors have valid CE markings under EN 14351-1?
Yes. All DERCHI exterior pedestrian and sliding door systems carry official CE markings backed by complete Declarations of Performance (DoP) under the harmonized European standard EN 14351-1:2006+A2:2016. Testing data covering air permeability (EN 12207), water tightness (EN 12208), wind load resistance (EN 12210), and acoustic attenuation (EN ISO 717-1) is provided for immediate submission to your project's structural certifiers and local Berlin building authorities.
How do your profiles achieve the required GEG 2024 thermal U-values?
We use proprietary multi-chamber thermally broken aluminium profiles featuring precision Technoform PA66 GF25 polyamide insulation strips measuring up to 34mm wide. Paired with triple-pane Low-E insulated glass units (IGUs) filled with 90% Argon gas and warm-edge composite spacers (Swisspacer / Technoform), our complete door systems achieve certified overall values between Ud 0.82 and 1.20 W/(m²K), effortlessly satisfying both GEG 2024 and KfW-40 criteria.
Can you customize dimensions for historic Berlin Altbau rough openings?
Absolutely. Unlike standard catalogue suppliers, every DERCHI door is fabricated to the millimeter based on your site measurements or door schedule. We regularly manufacture oversized doors up to 3.8 meters tall, segmented arch-top configurations, integrated side-lites, and custom transom glazing, ensuring seamless integration into historic Altbau wall structures with zero compromises in frame stability or aesthetics.
What anti-burglary (Einbruchschutz) ratings can you provide for ground-floor entrances?
Our security door systems are engineered according to DIN EN 1627-1630 resistance classes. We offer fully certified RC2 and RC3 assemblies featuring anti-drill lock reinforcement plates, concealed anti-lift hinge pins, multi-point hook locking mechanisms (German Roto or Siegenia hardware options), and P4A / P5A multi-layer laminated security glass with high-tensile PVB interlayers.
How does shipping and customs clearance work when importing to Germany?
We ship direct container loads or consolidated LCL sea freight from Shenzhen/Guangzhou to Hamburg or Bremerhaven ports (typical ocean transit time: 28–32 days). Our export documentation suite includes commercial invoices with correct TARIC/HS codes, packing lists, CE Certificates of Conformity, and ISPM 15 heat treatment stamps. We can coordinate directly with your German freight forwarder (Zollagent) or manage delivery straight to your construction site (DAP terms).
How are local installers supported during on-site fitting in Berlin?
Every door system is shipped with complete German and English language installation shop drawings, anchor position diagrams, and perimeter sealing details (RAL-Montage guidelines). Each profile section and glass unit is clearly numbered according to your building door schedule. Furthermore, our senior bilingual engineering desk provides live video installation assistance matched to Central European Time (CET).
Direct Factory Partnership · Berlin Project Estimating Desk
Request Detailed CE Technical Documentation & Project Pricing
Send us your door schedules, opening dimensions, or architectural elevations. Our technical facade team will review your specifications, prepare custom CAD shop drawings, and provide a competitive direct-from-manufacturer quotation within 24 hours.