Precision Engineered Fenestration
Featured Export-Grade Aluminium Doors & Window Systems
Explore our flagship OEM/ODM interior and exterior door solutions manufactured in Foshan to European (CE), North American (NFRC), and Australian (AS2047) standards.
Modern Aluminium Clad Wood Tilt & Turn Swing Window System
Aluminium Durable Interior Casement Glass Door 2-Panel
Commercial Double-Glass Swing French & Office Internal Glass Door
USA Energy Saving Triple Glazed Black Aluminium French Door
DEMEA Passive House Triple Glaze Exterior Aluminium Windows
CE Certified Thermal Break Aluminium Villa Casement Doors
Modern Aluminium Bi-Fold Patio & Interior Partition Glass Door
6063-T5
Virgin Alloy Grade
1.1W/m²K
Lowest Thermal U-Value
200K
Hardware Cycle Testing
40+
Global Export Markets
Whitepaper Insight · Strategic B2B Sourcing
The Technical Evolution of China's Aluminium Internal Door Manufacturing Hubs
In contemporary commercial and high-end residential architecture, internal doors are no longer treated as passive space dividers. They have evolved into critical acoustic barriers, spatial light conduits, and architectural design elements. China, and specifically the Foshan industrial fenestration cluster in Guangdong Province, has solidified its position as the global epicentre for high-precision aluminium internal door manufacturing.
The global demand for architectural aluminium internal doors has experienced a structural shift. Specifiers, real estate developers, and commercial contractors are increasingly replacing traditional timber and hollow-core interior doors with narrow-profile aluminium glass doors. This shift is driven by three essential factors: structural longevity under varying humidity, superior sound attenuation (STC ratings), and minimal maintenance requirements.
As a leading export-focused manufacturer, Zenic Window & Door Technology Co., Ltd. combines raw aluminum billet extrusion, precision CNC machining, and automated corner crimping to meet the rigorous physical and aesthetic requirements of overseas procurement teams.
Material Engineering
Metallurgical Integrity: Virgin 6063-T5 Extrusion Profiles
The performance of an internal aluminium door rests fundamentally on the purity of its alloy. Sub-standard suppliers frequently blend scrap aluminum to reduce billet costs, resulting in structural brittleness, micro-cracking during fabrication, and uneven anodizing or powder coating adhesion.
At ZENIC, all internal and exterior door profiles are engineered strictly using 100% primary 6063-T5 aluminum alloy. Wall thicknesses for internal structural profiles range between 1.4 mm and 2.0 mm, delivering exceptional torsional stiffness without adding redundant dead weight to interior wall framing.
Industrial Competence
Why Global Buyers Partner with Foshan Factory Ecosystems
Integrated manufacturing capabilities, rigorous quality gates, and customized OEM solutions built for volume distributors and project specifiers.
20,000 m² Integrated Facility
Our centralized manufacturing base in Foshan houses CNC profile cutting centers, high-capacity corner crimping lines, double-glazing lines, and automated packaging under one roof.
Continuous EPDM Sealing
Internal glass doors utilize triple-layer EPDM (Ethylene Propylene Diene Monomer) synthetic rubber gaskets, resisting drying, shrinkage, and hardening over 25+ years of operational use.
Hardware Tested to 200,000 Cycles
Concealed pivot hinges, top-hung sliding tracks, and magnetic latching mortise locks undergo 200,000-cycle durability testing to minimize maintenance callbacks for commercial projects.
Sea-Worthy Fumigation-Free Packaging
Every internal and external door system is protected by high-density EPE foam corner guards, shrink wrap, and packed inside fully enclosed plywood crates to eliminate transit damage.
Strict Certification Compliance
Engineered to meet certified standards including NFRC, CE Mark, AS2047, AAMA, CSA, and ISO 9001 quality management benchmarks for hassle-free customs clearance.
Complete OEM / ODM Flexibility
Custom extrusion die manufacturing, specialized RAL powder coating, AkzoNobel fluorocarbon finishes, anodized metallic tones, and private label logo engraving available.
Technical Specification Matrix
Comparison of Commercial & Residential Aluminium Door Systems
Review engineering tolerances, acoustic attenuation, frame depths, and glazing capabilities across common internal door typologies.
| System Typology | Profile Depth | Acoustic Rating (STC) | Glass Configuration | Hardware Mechanism | Primary B2B Application |
|---|---|---|---|---|---|
| Ultra-Slim Interior Sliding Door | 16 mm – 30 mm Sightline | STC 28 - 32 dB | 8mm / 10mm Tempered Monolithic | Top-Hung Soft-Close Track | Luxury Residential, Ensuite Bathrooms |
| Acoustic Interior Glass Casement | 45 mm – 50 mm Frame Depth | STC 35 - 42 dB | 5mm+9A+5mm Laminated Double Glazed | Concealed Hinges & Magnetic Lock | Executive Offices, Conference Rooms |
| Thermal Break Internal Folding Divider | 65 mm – 75 mm Frame Depth | STC 32 - 38 dB | 6mm Low-E + 12Ar + 6mm Tempered | Heavy-Duty Bottom-Load Rollers | Multi-purpose Halls, Open-Plan Partitioning |
| Heavy-Duty Commercial Swing Door | 90 mm Frame Depth | STC 36 - 40 dB | 6mm + 1.14PVB + 6mm Laminated Security | Multi-Point Locking & Overhead Closer | Commercial Storefronts, High-Traffic Entrances |
| Aluminium Clad Wood Hybrid Interior | 68 mm – 88 mm System Depth | STC 38 - 45 dB | Triple Glazed Insulated Glass Unit | 3D Adjustable Friction Hinges | Passive House Villas, High-End Hotel Suites |
Strategic Procurement Trends
Future Dynamics in Aluminium Internal Door Sourcing (2025–2030)
How global architecture demands, material sustainability, and smart building integration are transforming procurement requirements for developers and importers.
1. The Minimalist Ultra-Narrow Sightline Standard
Architectural preferences have shifted decisively toward invisible framing. Internal aluminum doors with narrow vertical stiles (16mm–25mm sightlines) are replacing conventional 50mm frame profiles. Manufacturers must deploy higher-density 6063-T6 or 6005-T6 alloys to maintain structural rigidity while drastically reducing face widths.
2. Enhanced Acoustic Privacy (STC 40+ Demands)
With the rise of hybrid working environments and acoustic privacy regulations in commercial buildings, interior doors must suppress airborne sound transmission. Sourcing specifications now emphasize dual-cavity EPDM perimeter drop-seals and acoustic laminated glass (PVB/SGP interlayers) to achieve STC ratings above 40 dB.
3. Smart Hardware Integration & Soft-Dampening
Mechanical key locks are rapidly giving way to magnetic levitation sliding tracks, silent magnetic latch mortise locks, and integrated biometric access points. Modern internal door factories in China are embedding concealed wiring tracks and CNC-routed lock pockets directly into profile extrusions.
4. Sustainable Anodizing & Zero-VOC Coatings
ESG compliance and green building standards (LEED, BREEAM) require internal door suppliers to offer certified non-toxic surface treatments. Water-based powder coatings, Qualicoat-certified fluorocarbon (PVDF) finishes, and micro-arc anodizing ensure low VOC emissions and high scratch resistance in commercial corridors.
5. Modular Prefabrication & KD (Knock-Down) Shipping
Rising global ocean freight rates have incentivized buyers to request pre-machined, Knock-Down (KD) internal door frames. By supplying corner-cleated modular frames that assemble on-site in under 15 minutes, factory container loading capacity is optimized by up to 250%.
6. Digital BIM & CAD Integration
Leading Chinese suppliers now provide full BIM (Building Information Modeling) Revit families and parametric CAD blocks alongside physical door samples. This digital integration allows architectural specifiers to seamlessly insert door schedules directly into project submittals.
R&D Innovation
Engineering Breakthroughs in Internal Door Construction
Traditional internal doors often suffer from structural sagging, latch misalignment, or thermal bridging when used near climate-controlled spaces. ZENIC’s engineering team has addressed these challenges through targeted structural innovations:
- Polyamide (PA66GF25) Thermal Isolators: Integrates 24mm glass-fiber reinforced polyamide strips within interior frame profiles, preventing heat transfer between air-conditioned living spaces and non-conditioned utility zones.
- Corner Pin-and-Glue Injection Technology: Eliminates frame joint gaps through high-pressure German glue injection into corner cleats, guaranteeing perfect 90-degree alignment under heavy glass loads.
- Universal Glass Adapter Profiles: Multi-functional sash profiles accept single 8mm toughened glass, 5+5 laminated safety glass, or 18mm double-glazed acoustic units without requiring specialized extrusions.
Procurement Intelligence
Frequently Asked Questions for Global Buyers & Importers
Essential guidance on minimum order quantities, lead times, custom finishes, shipping logistics, and quality assurance protocols.
What is the Minimum Order Quantity (MOQ) for importing aluminium internal doors from China?
Our standard minimum order quantity starts at 50 sets/pieces per project order. We accommodate mixed door types (e.g., combining internal sliding glass doors, casement doors, and folding partitions within a single LCL or 20ft container consignment). For distributor stock or long-term OEM contracts, sample production and pilot orders can be arranged upon technical drawing approval.
What is the typical manufacturing lead time for custom aluminium internal doors?
Standard production lead times range from 15 to 25 calendar days following CAD shop drawing sign-off and deposit receipt. Lead times depend on surface finish requirements: standard RAL powder coating takes approximately 15 days, while specialized anodizing, metallic PVDF coatings, or custom wood-grain heat transfer finishes may require 20 to 25 days.
How do Chinese aluminium door factories ensure acoustic isolation (STC ratings)?
Acoustic isolation is achieved through a multi-barrier engineering approach: using multi-chambered extrusion profiles, continuous perimeter EPDM gasket seals, drop-down automatic bottom acoustic seals, and sound-dampening laminated glass (e.g., 5mm + 0.76PVB + 5mm). When combined, these elements yield sound transmission ratings between STC 35 and STC 42 dB.
What surface finish options are available for architectural interior doors?
We offer a complete spectrum of architectural surface treatments, including:
• Powder Coating: Qualicoat Class 2 certified powders in full RAL color spectrums.
• Anodizing: Matte matte, champagne, bronze, dark brown, and brushed black anodized finishes (15–25 micron thickness).
• Fluorocarbon (PVDF): AkzoNobel 3-coat finishes for ultra-durable chemical and scratch resistance.
• Wood-Grain Transfer: Italian 3D vacuum heat-transfer wood textures for warm aesthetic interiors.
Can ZENIC manufacture internal doors according to custom client architectural drawings?
Yes. Over 85% of our export production is 100% custom-tailored (OEM/ODM). Our engineering team converts your architectural floorplans, door schedules, or elevation sketches into detailed CAD/BIM shop drawings for approval, verifying structural spans, wind load resistance (if exterior), glass safety compliance, and hardware compatibility prior to extrusion cutting.
What structural alloy standards are used for internal door profiles?
All structural frame and sash profiles are extruded using 6063-T5 or 6063-T6 architectural grade aluminum alloys. We strictly enforce a zero-recycled-scrap policy to prevent profile warping, structural embrittlement, or micro-pitting during surface finishing.
How are glass units certified for international building codes?
All glazing installed in our internal and external doors carries mandatory safety certifications corresponding to target export destinations. This includes SGCC (ANSI Z97.1) for North America, CE EN 12150 for Europe, and AS/NZS 2208 for Australia and New Zealand. Tempered safety glass, laminated toughened glass, and fire-rated ceramic glass options are fully supported.
What cargo protection measures are taken to prevent shipping damage?
Units undergo a 5-layer export packaging protocol: (1) Surface protective film, (2) High-density EPE foam corner protectors, (3) Waterproof plastic wrapping, (4) Heavy-duty corrugated cardboard boxing, and (5) Fully enclosed fumigation-free plywood crates with internal timber bracing. This setup withstands rough maritime transit and multi-stage container unloading.
Partner with China's Premier Aluminium Internal Door Manufacturer
Send us your project architectural drawings, window/door schedules, or procurement specifications. Our senior engineering team will deliver a comprehensive technical quote and shop drawing assessment within 24 hours.