Explore our core export-grade exterior entrance, armored pivot, and acoustic bifold systems configured under strict EN 14351-1, CE, NFRC, and ISO 9001 quality specifications.
Operating as Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI), our intelligent manufacturing campus provides the scale, precision tooling, and statutory certifications required by international tier-1 contractors.
Modern architectural procurement demands quantifiable physical metrics. Aluminum entrance assemblies from our facility integrate high-tensile extrusion alloys, structural thermal barriers, and patented multi-point locking kinematics.
Our OEM profiles utilize primary A00 ingot billets rather than secondary remelt scrap. This guarantees structural tensile strengths exceeding 205 MPa and yield strengths above 170 MPa, preventing deflection in oversized 3.2-meter architectural front entry doors.
To eliminate thermal bridging in extreme continental and sub-zero climates, our door sashes and outer master frames incorporate 24mm to 34mm fiberglass-reinforced polyamide insulating struts, achieving exceptional whole-door thermal transmittance values.
Our factory-patented "Four-Side Six-Point Lock" invention mechanically engages mushroom cams and hardened steel deadbolts across all sash perimeters simultaneously, countering crowbar and hydraulic prying forces up to European RC3/RC4 ratings.
| Technical Characteristic | Standard Residential Grade | Commercial Tier / Multi-Family | DERCHI High-End OEM/ODM System |
|---|---|---|---|
| Alloy Composition | 6063-T5 (1.4mm - 1.6mm) | 6063-T6 (1.8mm - 2.0mm) | 6063-T6 / 6061-T6 (2.2mm - 3.5mm) |
| Thermal Barrier Core | Non-thermal or 14.8mm PVC | 20mm PA66 Polyamide | 24mm - 34mm PA66 GF25 Reinforced |
| Overall Door U-Value (Ud) | Ud 1.8 - 2.4 W/(m²·K) | Ud 1.3 - 1.6 W/(m²·K) | Ud 0.78 - 1.1 W/(m²·K) (Passivhaus Ready) |
| Perimeter Locking System | Single deadbolt / 3-point latch | 3-point hook lock | Four-Side Six-Point Patented System |
| Weather Seal Integration | Dual brush or TPE strip | Dual vulcanized EPDM | Triple Continuous Continuous-Foam EPDM |
| Max Sash Dimensions | 1000mm x 2200mm | 1200mm x 2600mm | Up to 2000mm x 3800mm (Pivot/Double) |
As regulatory codes tighten and high-end residential architecture transitions toward monolithic, low-carbon facades, contract buyers must adapt their OEM/ODM procurement strategies to align with these five major market evolutions.
Driven by Germany's GEG, France's RE2020, and UK's Part L revisions, front entrance door specifications are shifting from nominal weatherproofing to strict thermal envelopes requiring Ud ≤ 0.8 W/(m²·K). Procurement departments now demand certified Environmental Product Declarations (EPD) and recycled billet content verification directly from factory smelters.
Traditional hinged single doors are losing market share in high-end developments to monumental pivot systems exceeding 1.8 meters in width and 3.5 meters in height. OEM manufacturing requires specialized floor spring dampening engineering, concealed overhead pivots, and balanced axis calculations to handle sash weights up to 450 kg effortlessly.
Modern entry systems must incorporate factory-integrated biometric access control. Sourcing teams are phasing out mechanical field-retrofit cylinders in favor of OEM-routed 3D facial recognition scanners, concealed fingerprint sensors in pull handles, motorized multi-point locks, and encrypted bus systems (KNX/Zigbee/Matter) pre-wired in the factory frame.
Coastal and high-salinity zones require powder formulations exceeding standard AAMA 2603 specs. Sourcing officers now mandate AAMA 2604/2605 and Qualicoat Seaside Class 2 fluoropolymer coatings with 20-year gloss retention, complemented by physical vapor deposition (PVD) titanium handles resistant to UV oxidation and fingerprint etching.
Homeowners refuse bulky security grilles. Sourcing demands armored aluminum hybrid structures where internal galvanized manganese steel armor cores, anti-drill plates, and multipoint kinetic pins are invisibly embedded between flush aluminum aesthetic skins, providing EN 1627 RC3 burglary prevention in a sleek minimalist profile.
Developers are eliminating separate vendor coordination by consolidating procurement with single-source OEM/ODM manufacturers capable of delivering exterior front doors, bifold patio doors, casement windows, and architectural sunrooms with matched RAL powders and unified engineering warranties.
Recognized as a "China Famous Brand" by Xinhua News Agency, our Foshan intelligent manufacturing base blends precision fabrication with verified international compliance, securing your project schedules and gross margins.
Over two decades of precision fenestration metallurgy, delivering 18,000+ completed projects across luxury residential, commercial towers, and global resort hospitality chains including Hilton Hotels and Beverly Hills custom estates.
Our 180,000m² manufacturing base with 600+ skilled personnel and 1,000,000m²+ annual output guarantees that multi-container commercial procurement schedules avoid production bottlenecks common to fragmented workshops.
Complete project compliance portfolios pre-tested for destination customs clearance: CE (EN 14351-1), ISO 9001, NFRC (USA), Energy Star, AS2047 (Australia), CSA (Canada), and hurricane impact ratings.
Bespoke die extrusion development, 3D structural stress simulations, thermal boundary element analysis, and shop drawing preparation turnaround within 48 hours for architect approvals.
From spectrographic analysis of raw aluminum ingots to optical corner weld inspection, hermetic pressure testing, and trial assembly of oversized doors before export crating.
Moisture-barrier vacuum bagging, full corner steel edge protectors, EPE foam buffering, and fumigated solid timber crates engineered to endure trans-oceanic shipping to Rotterdam, Hamburg, Felixstowe, Long Beach, and Sydney.
A transparent, milestone-driven protocol designed specifically for overseas contractors, developers, and door brand owners to mitigate communication errors and ensure zero-tolerance accuracy.
Rigorous analysis of CAD elevations, wall cross-sections, structural rough openings, and wind-load performance thresholds.
Extrusion die selection, thermal barrier profiling, and hardware kinematic selection matching project thermal and safety criteria.
Comprehensive Bill of Materials (BOM), cross-sectional system CAD details, certified thermal calculations, and transparent tier-volume pricing.
Detailed color match samples (RAL cards), glass buildup configuration sign-offs, and final client millimeter-level shop approvals.
Automated cutting, 5-axis corner milling, drainage port routing, and thermal strut crimping under computerized CNC control.
Electrostatic Qualicoat powder application or chemical anodizing with strict dry-film thickness (DFT) and adhesion cross-hatch checks.
Integration of multi-point locks, thermal gaskets, structural infills, followed by 100% pre-hanging tests on factory calibration jigs.
Container load optimization, moisture protection, export documentation, and comprehensive installation manuals supplied with technical guidance.
Direct answers from our senior fenestration export engineering team to resolve commercial, technical, and logistics inquiries.
Yes. Our exterior front door and fenestration systems hold CE marking conforming to EN 14351-1. We supply the complete Declaration of Performance (DoP), factory production control records, and accredited laboratory test data certifying air permeability (Class 4), watertightness (Class 9A or higher), wind resistance (Class C5), and thermal transmittance (EN ISO 10077-1/2).
For standard architectural profiles with RAL color selections, our MOQ starts at 1 full set for bespoke villas or 10–20 sets for multi-family developments. Standard production lead times run between 25 to 35 working days post-shop-drawing sign-off. Custom extrusion dies require an additional 15 days for tooling fabrication, sample extrusion, and mechanical testing.
We configure multi-chamber polyamide thermal break profiles (PA66 GF25) coupled with high-density polyurethane (PU) insulation cores or argon-filled triple-glazed units with warm-edge spacers and Low-E soft coatings. By tailoring sash thickness (up to 100mm) and glass configurations, we reliably achieve overall door thermal values of Ud < 0.8 W/(m²·K).
Absolutely. Our factory R&D department regularly engineers cut-outs and cable harnesses for world-class lock systems such as Winkhaus, Siegenia, KFV, GU, and smart European digital cylinders. We offer integrated hidden conduits, motorized latch retractor drives, and handle-embedded biometric sensors tested prior to container packing.
For installations within 5 kilometers of the shoreline, we mandate Qualicoat Seaside Class 2 architectural powder coatings (polyvinylidene fluoride - PVDF) with pre-anodization pretreatment, or deep chemical anodizing rated at 25 microns (AA25). This ensures zero filiform corrosion, blistering, or salt-fog oxidation exceeding 3,000 hours under ASTM B117 testing.
Every sash and outer frame is sealed in scratch-resistant polyethylene film, corner-protected with high-density polymer caps, wrapped in shock-absorbing EPE closed-cell foam, and secured inside fumigated solid plywood crates with internal timber stiffeners. Crates are engineered with forklift base runners and container lashing points to prevent shifting during transit.
Whether you require custom extrusion tooling, certified thermal break entrance systems for multi-family residential contracts, or luxury monumental pivot doors, our engineering team is ready to evaluate your architectural schedules and provide detailed proposals.