Factory-direct fenestration engineered with high-tensile 6063-T6 aluminum alloys, multi-cavity polyamide PA66-GF25 thermal breaks, and heavy-duty German architectural hardware.
Operating from Foshan, Guangdong—the epicentre of global architectural aluminium extrusion—Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) has spent over 25 years establishing an uncompromising benchmark for high-performance exterior and interior double doors.
Unlike regional assembly workshops or commercial brokers, our 180,000 m² smart manufacturing campus houses fully integrated fabrication lines. From precision CNC profile cutting and hydraulic 4-corner crimping to automated glass silicone structural glazing, every double door unit is manufactured under a digital zero-error quality management protocol.
Official National Recognition: Certified as a "China Famous Brand" by Xinhua News Agency, DERCHI products are installed across 18,000+ landmark projects worldwide, including international hospitality groups like Hilton and Atour, as well as ultra-luxury private estates in Dubai, Riyadh, London, and Sydney.
Featuring our independently developed Four-Side Six-Point Anti-Theft Lock invention patent, our aluminium double doors secure large structural portals against severe forced-entry loads, violent pry attacks, and high cyclic wind oscillations.
Fully certified to meet rigorous global building codes: CE (European EN 14351-1), NFRC & Florida Hurricane Impact (USA TAS 201/202/203), AS2047 & AS1288 (Australia), CSA (Canada), Energy Star, and ISO 9001 certified precision.
Large architectural double doors represent the most vulnerable interface in a building's thermal envelope and structural barrier. Here is how our engineering eliminates thermal bridging, air infiltration, and acoustic resonance.
We utilize Technoform PA66-GF25 (25% glass fibre reinforced) thermal break struts across all exterior profile series. By separating interior and exterior aluminium chambers by up to 34mm, conductive thermal bridging is eliminated, maintaining U-values as low as 1.1 W/m²K even during 55°C GCC desert heat waves or -30°C Canadian sub-zero winters.
Standard residential doors fail under high wind loading due to profile bowing and air leakage at meeting stiles. DERCHI double doors are fabricated with 2.0mm to 3.5mm structural wall thicknesses and reinforced internal structural ribs, achieving moment of inertia (Ix) ratings capable of resisting typhoons and hurricane gusts exceeding 5,000 Pa (equivalent to 200+ km/h).
Urban noise pollution demands heavy structural damping. Our double glazing configurations combine asymmetric glass panes (e.g., 6mm Low-E + 16Ar + 8.76PVB acoustic laminated glass) with vulcanized continuous EPDM gasket lines, attenuating low-frequency traffic rumble and aircraft noise with sound insulation indices exceeding Rw 42 dB to 45 dB.
| System Typology | Structural Profile Thickness | Max Single Sash Size | Thermal Transmittance (Uw) | Water Tightness / Wind Load | Primary Commercial Application |
|---|---|---|---|---|---|
| French Double Swing Portals | 2.0mm – 2.5mm (6063-T6) | 1200mm (W) × 3000mm (H) | 1.2 – 1.5 W/m²K | Class 9A (600 Pa) / 4500 Pa | Balconies, Luxury Entrances, Master Suites |
| Heavy Lift & Slide Double Units | 2.5mm – 3.0mm (Heavy Gauge) | 3200mm (W) × 3800mm (H) | 1.1 – 1.4 W/m²K | Class E1050 (1050 Pa) / 5000 Pa | Panoramic Penthouses, GCC Villas, Beachfronts |
| Multi-Sash Bi-Fold Double Systems | 2.0mm – 2.2mm (Multi-Cavity) | 1000mm (W) × 3200mm (H) | 1.3 – 1.6 W/m²K | Class 8A (450 Pa) / 3800 Pa | Commercial Terraces, Pool Enclosures, Restaurants |
| Architectural Pivot Double Gates | 2.5mm – 3.5mm (Reinforced) | 2000mm (W) × 4200mm (H) | 1.4 – 1.8 W/m²K | Class 7A (350 Pa) / 4000 Pa | Grand Villa Portals, Headquarter Lobbies |
Architects, real estate developers, and international contractors are shifting procurement matrices toward decarbonization, extreme durability, and smart automation.
Universal barrier-free accessibility is moving from commercial compliance to luxury residential standard. Future procurement focuses on concealed stainless-steel drainage channels integrated flush with interior flooring, preventing rain pool backwash while sustaining water tightness ratings up to 900 Pa without trip hazards.
Minimalist design demand is pushing interlock sightlines down to under 25mm while glass pane weights surpass 450kg. Meeting this trend requires factories with multi-axis CNC milling centers, carbon-fiber reinforced structural polymer inserts, and heavy-duty concealed roller assemblies running on hardened alloy bearings.
With LEED, BREEAM, and EU CBAM environmental carbon tariffs taking effect, developers demand Environmental Product Declarations (EPD). DERCHI is leading China's green fenestration transition by integrating secondary low-carbon aluminium billet ingots smelted via hydropower, lowering embodied carbon by up to 65%.
Exterior double doors are no longer passive barriers. Modern commercial and villa procurement specifications mandate integration with smart building management systems (BMS), magnetic levitation motorized drives, motorized multi-point locks, and electrochromic switchable smart privacy glass.
With major infrastructure projects expanding along GCC coasts, the Mediterranean, and Florida, standard powder coating suffers chalking and blistering. The industry is moving to Qualicoat Class 2/3 super-durable fluorocarbon (PVDF) 3-coat finishes, backed by 30-year anti-fading warranties against intensive UV and salt spray exposure.
High overseas labor costs have made on-site fabrication uneconomical. Developers favor suppliers delivering factory pre-hung, sub-framed modular double door sets with plug-and-play anchors, reducing on-site installation time by up to 55% while eliminating contractor installation errors.
From raw CAD architectural elevations to on-site crane glazing guidance, we provide overseas buyers with complete engineering predictability and zero-defect assurance.
Our structural façade engineers assess architectural blueprints, local design wind pressures (kPa), seismic zones, and elevation exposures.
Selection of customized extrusion dyes, polyamide thermal bridge widths, and glazing packages optimized for site U-value and SHGC targets.
Generation of complete 1:1 scale CAD and BIM cross-sectional submittals detailing anchors, flashings, structural mullions, and drainage paths.
Precision corner cross-sections, hardware samples, and powder coating color swatches shipped via air courier for physical architect sign-off.
Clear contractual milestones, fixed B2B factory pricing, and reserved CNC machining and assembly scheduling in our Foshan plant.
Automated precision double-mitre sawing, robotic lock mortising, and computerized corner crimping ensuring tolerances under 0.2mm.
Factory trial assembly of every double door set: air tightness testing, diagonal tolerance checks, lock cycling, and protective multi-layer packaging.
Steel-strapped fumigated timber crates, full container loading plans, step-by-step 3D video manuals, and remote/on-site installation support.
Detailed answers directly from our fenestration engineering, quality assurance, and export logistics departments.
Whether you are sourcing custom double doors for an ultra-luxury private villa, tender procurement for a hotel chain, or establishing a regional distributorship, our technical specialists provide full shop drawing reviews, wind-load assessments, and competitive factory-direct quotations.