Do DERCHI entry doors meet European requirements?

DERCHI products hold CE certification and are manufactured under an ISO 9001 quality management system. For each European project our engineers confirm the achievable performance values for the specific size, glazing and hardware, and supply the matching documentation for your declaration of performance under EN 14351-1.

Can entry doors be customised for European architectural projects?

Yes. Door size, opening direction, pivot or hinged configuration, RAL powder-coat colours, wood-grain finishes, glazing, handles and multipoint locking are all configurable. Our in-house engineering team prepares free CAD shop drawings that follow your door schedule.

How are doors delivered to Europe?

Doors are protected with reinforced export packaging and shipped by sea freight to major European ports such as Rotterdam, Hamburg, Antwerp and Felixstowe. A dated production and shipping schedule is confirmed with every order after drawing approval.

Do you provide installation support for European installers?

Every order includes clear installation manuals, and our English-speaking engineers provide remote technical guidance during European business hours, from first consultation to after-sales support.

Who does DERCHI work with in Europe?

We support architects, interior designers, property developers, building contractors, door and window distributors and private homeowners building or renovating villas, residences, hotels and commercial buildings.

Custom OEM Aluminium Ka Door Manufacturer & Factory in Seoul

Precision Thermal Break Extrusions, KS-Compliant Architectural Engineering, and Direct OEM/ODM Manufacturing for Korea’s Modern Commercial & High-Rise Residential Facades.

Engineered Portfolio

Engineered Aluminium Systems & Architectural Product Series

Explore our export-certified architectural systems manufactured under strict ISO 9001 and European EN standards, fully adaptable to Korean KS structural, airtightness, and thermal specifications.

Miami NOA Hurricane Proof Impact Resistance Triple Glazed Aluminum Patio Door

Technical White Paper

Defining the High-Performance "Ka Door" System in Korean Fenestration

In the contemporary Korean architectural landscape, the "Ka Door" (가도어 / 중문 및 시스템도어) denotes high-specification architectural aluminium opening systems characterized by ultra-narrow frame profiles, continuous structural thermal barriers, and precision-engineered multi-point locking gear.

Alloy Metallurgy & Precision Extrusion

Fabricated exclusively using primary architectural 6063-T6 or 6061-T6 structural aluminum alloys, our Ka Door profiles achieve a tensile strength exceeding 205 MPa and yield strength over 170 MPa. Through state-of-the-art CNC extrusion, profile tolerances are maintained within ±0.15 mm, enabling ultra-slim sightlines without compromising wind-load inertia or structural deflection limits under severe high-rise wind loads.

Polyamide PA66 Thermal Barriers

To resist Seoul's continental sub-zero winter temperatures (-15°C) and hot, humid monsoons, our thermal break systems incorporate continuous glass-fiber-reinforced PA66 GF25 insulation strips (24 mm to 34 mm depth). These breaks decouple indoor and outdoor profiles, mitigating thermal bridging, preventing interior interstitial condensation, and delivering overall door thermal transmittance values (U_d) as low as 0.92 W/m²·K.

Multi-Chamber EPDM Sealing Matrix

Equipped with co-extruded peroxide-cured EPDM foaming weatherstrips and vulcanized corner joints, Ka Door configurations achieve Grade 1 airtightness under KS F 2292 (leakage rate < 1 m³/h·m²) and watertightness beyond 500 Pa under KS F 2295. The acoustic dampening core yields sound transmission class (STC) ratings up to 42 dB, insulating interiors from dense Seoul urban transit noise.

Regional Deployment

Engineered for Seoul's Demanding Architectural Topography

From prestigious private villas in Hannam-dong to modern retail flagships in Seongsu and high-density residential towers along the Han River, our OEM aluminum doors are customized to meet specific micro-climatic and functional demands.

Luxury Hannam & Cheongdam Villas

Prestige residences in UN Village, Hannam The Hill, and Cheongdam-dong require monumental floor-to-ceiling pivot and oversized double-swing Ka Doors. Finished with specialized fluorocarbon (PVDF) matte coatings or architectural bronze anodization, these entrance systems seamlessly support biometric recognition, concealed overhead hydraulic closers, and motorized multi-point locking gear.

Seongsu & Gangnam Flagship Retail

Commercial districts in Seongsu-dong, Sinsa-dong, and Gangnam demand ultra-slim frame profiles with panoramic glazed areas. Our heavy-duty aluminum bifold and wide-span sliding systems allow uninterrupted sightlines, effortlessly managing high pedestrian cycles while withstanding repetitive mechanical stress and wind drafts.

Pangyo & DMC Corporate Campuses

For tech headquarters and mixed-use commercial buildings in Pangyo Techno Valley and Mapo Digital Media City, acoustic isolation and thermal efficiency are critical. Our thermally broken aluminum interior swing and partition doors provide certified sound dampening for conference suites and executive boardrooms.

High-Rise Apartment Modernization

In high-density apartment complexes (such as Raemian, Acro, and Xi developments across Mapo and Songpa), residential retrofits prioritize space optimization and draft prevention. Our 3-track sliding and narrow-stile folding Ka Doors serve as sophisticated interior entrance transitions (중문), maximizing floor area and reducing indoor heat loss.

Market Evolution

Emerging Architectural & Fenestration Trends Across the Seoul Metropolitan Area

The construction sector across Seoul and Gyeonggi-do is undergoing rapid regulatory and aesthetic shifts. Navigating these requirements demands an OEM partner who blends global manufacturing capacity with localized compliance acumen.

Zero Energy Building (ZEB) Mandates

Under South Korea's updated Green Building Creation Support Act, public and private developments exceeding 1,000 m² must achieve strict Zero Energy Building ratings. The Seoul Metropolitan Government enforces stringent U-value ceilings for exterior doors and fenestration (frequently requiring U_d ≤ 1.0 W/m²·K). Our thermally broken Ka Door systems integrate triple-pane low-E glass filled with 90% argon gas to easily surpass Tier-1 energy efficiency criteria.

Extreme Minimalist "Slim-Line" Aesthetics

Architects in Seoul are actively departing from bulky PVC profiles in favor of visible sightlines under 25 mm. Achieving this structural minimalism requires aerospace-grade aluminum extrusion with reinforced corner cleating and mechanical crimping. Our factory leverages CNC multi-axis milling to conceal hinges, water drains, and shoot-bolts inside the profile chambers.

Smart IoT Hardware & Push-Pull Access Integration

Korea is the world's most sophisticated smart-lock market. High-end buyers expect seamless integration with digital mortise systems (Samsung, Yale Korea, Gateman) and Zigbee/Matter protocols. DERCHI's custom OEM production lines pre-mill profile stiles using automated CNC routines, guaranteeing plug-and-play installation for domestic push-pull digital locks, face-recognition modules, and motorized automated operators.

Manufacturing Authority

Industrial Scale & Engineering Prowess: Why Global Developers Choose DERCHI

Recognized as one of the premier door and window manufacturers, Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) combines 25+ years of engineering mastery with a state-of-the-art 180,000 m² automated production facility.

180,000 m²

Production Infrastructure

600+

Skilled Craftsmen & Engineers

30+

Patented Systems & Innovations

25+

Years of Structural Engineering

Rapid CAD/BIM Shop Drawing Service

Our dedicated engineering department provides comprehensive CAD detail drawings, structural wind load analysis, and BIM models within 48 hours of project brief receipt. Whether adapting to unique sill details for wet zones or customized threshold rebars for low-profile barrier-free access, our custom OEM engineering aligns with your architectural schedules.

Stringent International Quality Control

Operating under ISO 9001 certified quality control regimens, every production run is subjected to rigorous testing. Doors undergo cycle-testing (exceeding 100,000 continuous opening cycles), air pressure chambers up to 3,000 Pa, and water tightness deluge simulations. We hold international accreditations including CE marking (EN 14351-1), AS2047 N6 certification, and UL fire-rating compliance.

End-to-End Export Logistics to Incheon & Busan

Understanding the fast-paced nature of Korean commercial site handovers, we offer complete containerized shipping management. Every door leaf and subframe is encapsulated in multi-layer pearl foam, reinforced corner shields, and heavy-duty steel-banded fumigated plywood crates, ensuring safe transit to Incheon Port (ICN) or Busan Port (PUS) within 7–10 days shipping time from Foshan.

Technical Matrix

Architectural Specification & Performance Benchmarks

Review engineering parameters across our primary aluminum entrance, sliding, folding, and casement door typologies.

System Typology	Alloy Profile & Depth	Thermal Barrier (Polyamide)	Glazing Specification	Air / Water / Wind Rating	Target Local Application
Monumental Pivot Ka Door	6063-T6 / 85 mm - 100 mm	PA66 GF25 34 mm Strips	Triple 6mm Low-E + 16Ar + 6mm	U_d ≤ 0.95 W/m²·K	Hannam & Seongbuk Luxury Villa Portals
Thermally Broken Exterior Bifold	6063-T6 / 75 mm Depth	PA66 GF25 24 mm Strips	Double 5mm Low-E + 14Ar + 5mm	Class 4 / 600 Pa	Commercial Cafes & Flagship Retails
Slim-Stile Interior Partition	6063-T6 / 45 mm Profile	Non-Thermal / Acoustic Damped	8mm / 10mm Laminated Acoustic	STC 38 dB Acoustic	Pangyo Tech HQs & Apartment Modernization
Heavy Casement Entry Swing	6061-T6 / 70 mm Depth	PA66 GF25 28 mm Strips	Triple Glazed Impact Resistant	KS Grade 1 Tightness	Suburban Residences & High-Rise Balconies
Hurricane-Rated Patio Sliding	6063-T6 / 120 mm Heavy Track	Multi-Chamber Thermal Poly	6mm + 1.52PVB + 6mm Laminated	AS2047 N6 Approved	Coastal Incheon & Mountain-Facing Slopes

Procurement Knowledgebase

Frequently Asked Questions: Sourcing Custom OEM Aluminium Doors for South Korea

Direct answers for Korean general contractors, interior designers, real estate developers, and fenestration distributors regarding standards, custom engineering, and procurement pipelines.

Do DERCHI aluminum doors comply with Korean Standard (KS) building codes? +

Yes. Our products are engineered to conform to KS F 3117 (Door Sets), KS F 2292 (Airtightness), and KS F 2295 (Watertightness). We regularly supply commercial and multi-unit residential projects requiring stringent heat transmission coefficients (U-values) under the Building Energy Conservation Code administered by the Korea Energy Agency. Project-specific testing reports, declaration of performance, and material safety data sheets are provided alongside every shipment.

Can you customize extrusion dies and profile milling for domestic Korean smart locks? +

Absolutely. Custom OEM/ODM is our core business. We maintain in-house tooling workshops to cut bespoke extrusion dies according to your architectural drawings. Furthermore, our automated CNC milling stations are routinely programmed to rout mortise slots, spindle holes, and wire conduits specifically for domestic Korean push-pull smart locksets (such as Samsung SDS, Gateman, and Kaadas), guaranteeing immediate on-site hardware installation with zero manual field drilling.

What is the standard manufacturing lead time and sea freight schedule to Seoul? +

Standard OEM production requires 25 to 35 calendar days following CAD shop drawing approval and color sign-off. Shipping from our Foshan industrial center via Shenzhen or Guangzhou ports to Incheon Port (ICN) or Busan Port (PUS) takes only 4 to 7 ocean transit days. Total turnaround typically averages 5 to 6 weeks, providing Korean construction sites with reliable scheduling that mirrors domestic supply chains while yielding significant cost savings.

How do your thermal break systems perform during extreme -15°C Seoul winter conditions? +

Our systems use imported German Technoform or premium equivalent PA66 GF25 polyamide thermal struts. Combined with triple-glazed units filled with argon and warm-edge composite spacer bars, our doors achieve a condensation resistance factor (CRF) well above 70. This ensures that even when internal temperatures are kept warm with ondol (floor heating) systems and outdoor temperatures drop to -15°C, interior frame surfaces remain dry and free from moisture condensation.

What surface finish warranties are provided against urban particulate matter and coastal exposure? +

We offer architectural powder coatings certified under Qualicoat Class 2 / AAMA 2604/2605 (using AkzoNobel or PPG powders) as well as 25-micron hard-anodized finishes. These surface treatments resist micro-dust (fine dust/PM2.5), sulfurous urban vehicle emissions, and acidic precipitation common in metropolitan Seoul. All finishes carry an extended factory warranty of 10 to 20 years against fading, chalking, cracking, or peeling.

What are the Minimum Order Quantities (MOQ) for custom-engineered OEM projects? +

For standard profile collections with bespoke dimensions and RAL powder colors, our MOQ starts at just 1 complete set for high-end bespoke residential villas or prototype testing. For full custom extrusion profiles requiring dedicated die creation, our MOQ is typically 1 metric ton of aluminum profile, which can be held in inventory for staged production across your residential or commercial development schedule.

Do you provide remote installation support and shop drawing generation for local builders? +

Yes. Every order is paired with an English-fluent facade engineer who prepares millimeter-accurate 2D CAD elevations, cross-sectional connection details, and structural anchoring plans. During the site installation phase, we supply complete bilingual assembly manuals, exploded-view component diagrams, and remote video consultation during standard Korean business hours (KST) to support your local glazier or installation crew.

Partner with China's Premier Door Manufacturer for Your Seoul Developments

Whether you require bespoke architectural pivot portals for luxury villas or volume supply of ultra-slim interior systems for residential developments, DERCHI delivers precision engineering, competitive factory pricing, and turnkey OEM/ODM expertise.

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