Engineered for Commercial Contractors, Developers & Global Distributors
Delivering high-performance architectural aluminum solutions backed by rigorous engineering.
Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door manufacturer operating from a modern 35,000 m² facility. With 16 years of industry expertise and 8 years of dedicated export experience, the company generates an annual export revenue of USD 28 million. Grounded in strong OEM and ODM trade backgrounds, our products primarily serve North America and Western Europe, supported by a network of over 1,200 supply chain partners. We cater to leading building material distributors, real estate developers, and commercial contractors. Quality is integral to our operations: supported by strict ISO 9001 certified internal testing and third-party laboratory verification, our 45-member QA team ensures rigorous quality control throughout production. Driven by an active R&D division with 85 specialized engineers, we introduced 120 new door designs last year and offer full custom solutions spanning custom dimensions, security locks, surface finishes, and decorative glass panels.
Why leading global enterprises partner with Chinese OEM exporters for architectural fenestration.
Leveraging direct access to primary aluminum ingot refining hubs and automated extrusion facilities. Modern multi-axis machinery allows massive scalable production, significantly reducing marginal production costs while maintaining architectural precision.
From 6063-T5/T6 structural aluminum extrusion to multi-point CNC milling and drilling. Computerized automated sorting guarantees dimensional tolerances within ±0.1mm, essential for heavy curtain walls and high-load sliding doors.
Comprehensive surface treatments including PPG PVDF coating, AkzoNobel powder coating, anodizing, and Italian wood grain thermal transfer. Engineered to withstand harsh coastal atmospheric salt-spray testing exceeding 3,000 hours.
Explore our 35,000 m² state-of-the-art facility processes from raw extrusions to finished validation.
Raw materials
Sawing
Milling
CNC Milling
CNC Drilling
CNC Center
Cutting
Intelligent Sorting
Checking and Packing
Sawing Machine
Milling Machine
CNC Milling Machine
CNC Drilling Machine
CNC Center Machine
Double Head Cutting Saw
Intelligent Sorting Line
Semi-finished products inspection
Performance tester
Ensuring cross-border architectural projects satisfy local building codes and strict energy standards.
Our thermal break doors and window systems comply fully with National Fenestration Rating Council (NFRC) guidelines for U-Factor and Solar Heat Gain Coefficient (SHGC). For hurricane-prone zones such as Florida, products undergo rigorous Notice of Acceptance (NOA) and Florida Product Approval (FPA) testing for missile impact resistance and wind deflection.
Extensively engineered for the Australian residential and commercial market. Compliant with AS2047 (Windows and External Glazed Doors in Buildings) and AS1288 (Glass in Buildings), ensuring certified water penetration resistance, structural deflection limits, and air infiltration metrics verified by accredited third-party labs.
Integrated thermal isolation technology meets European energy standards (EnEV and EPBD). Standardized with multi-chamber polyamide thermal break strips (PA66GF25), delivering superior insulation values (Uf ≤ 1.4 W/m²K) for zero-energy green building projects across Western Europe.
The following performance matrix illustrates the technical metrics achieved across our standard, thermal break, and hurricane-rated aluminum door product ranges:
| Product Series | Thermal Break Profile | U-Factor Rating (W/m²K) | Acoustic Rating (STC / Rw) | Water Penetration Resistance | Target Certifications |
|---|---|---|---|---|---|
| Ultra-Slim Sliding Series | PA66GF25 (20mm) | 1.8 - 2.2 | 32 - 36 dB | 450 Pa | CE, AS2047 |
| Heavy-Duty Architectural Bifold | PA66GF25 (24mm) | 1.4 - 1.7 | 38 - 42 dB | 600 Pa | AS2047, NFRC |
| Hurricane Impact Entry Systems | Structural Thermal Composite | 1.2 - 1.5 | 40 - 45 dB | 750 Pa (15 psf) | NOA, FPA, NFRC |
| Smart Electronic Subterranean Garage | Reinforced Insulated Core | 2.0 - 2.4 | 30 - 35 dB | 300 Pa | ISO 9001, CE |
How developers, architects, and B2B buyers navigate international door sourcing seamlessly.
Procuring custom aluminum doors for commercial real estate developments or distribution networks requires balancing upfront capital expenditure against long-term operational durability. Enterprise buyers face critical bottlenecks in supply chain transparency, quality control verification, and international freight synchronization. Grandex Door Solutions addresses these operational risks through a structured OEM workflow:
Our 85 R&D engineers produce 2D/3D CAD shop drawings and BIM models, verifying structural deflection calculations, dead-load tolerances, and weatherproofing details before extrusion cutting commences.
Every step—raw material billet inspection, extrusion thermal testing, powder coat thickness check (≥ 60 microns), unit assembly, and glass seal testing—is governed under strict ISO 9001 protocols.
Custom heavy-duty plywood crates with fully wrapped protective film, corner guards, and air-cushioned interior padding prevent transit corrosion and shipping damage, arriving site-ready worldwide.
Tailored aluminum door integrations across residential, commercial, and subterranean installations.
Utilizing high-span motorized bifold and sliding door systems with Low-E double/triple glazing. Maximum panel heights up to 4.5 meters seamlessly blend indoor and outdoor living areas while offering high resistance against marine corrosion and wind load pressures.
Incorporating custom thermal break awning windows and motorized glass louvers into hotel lobbies, restaurants, and shop receptions. Provides automated micro-ventilation, superior soundproofing (STC up to 45dB), and elevated architectural aesthetics.
Heavy-duty, smart electronic aluminum garage doors engineered specifically for underground parkings and private basements. Integrated automated closing mechanisms, tamper-proof locks, and solid aluminum face panels deliver ultimate privacy and security.
Addressing essential questions regarding custom aluminum door manufacturing, OEM services, and export logistics.
We provide full bespoke OEM/ODM engineering including custom extrusion profile dimensions, thermal break width configurations, surface finishes (powder coating, anodizing, PVDF, wood grain transfer), high-security multi-point locks, and specialty glass units (laminated, tempered, argon-filled, low-E).
Our engineering team selects specialized multi-chamber thermal breaks and low-emissivity glass assemblies to meet U-Factor and SHGC standards. For hurricane regions, structural frame reinforcement and heavy-duty laminated impact glass enable compliance with stringent Florida Product Approval (FPA) missile testing.
Standard production lead time is 25 to 35 business days from CAD drawing approval and deposit receipt. For complex custom extrusion profiles requiring new dies, add 10-15 days for die matrix fabrication and sample testing verification.
Our 45-member QA division operates under ISO 9001 certified protocols. Every product unit undergoes strict raw material testing, CNC machining inspection, corner seal waterproofing checks, and cycle testing before being packed in export-grade plywood crates.
Yes, our flagship sliding, awning, and bifold window/door lines are certified to Australian standard AS2047, validated by independent testing laboratories for structural performance, wind resistance, and water tightness.
We use high-grade structural polyamide thermal barrier strips (PA66GF25) combined with double or triple insulated glass units filled with 90%+ Argon gas and Low-E coatings, minimizing heat transfer and reducing HVAC energy consumption.
High-performance fenestration designed for diverse global environments.
Grandex Door