Engineered to meet stringent international standards including NFRC, AAMA, NOA hurricane-ratings, and Title 24 energy compliance.
Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door manufacturer operating from a modern 35,000 m² facility. 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.
Addressing the complex engineering challenges of urban densification, commercial sound isolation, extreme weather resilience, and life-safety compliance.
Designed for contemporary high-rise apartments and residential complexes requiring unified elevation aesthetics, high-durability hardware, and anti-burglary structural frames. Our custom security doors offer multi-point locking systems and reinforced steel internal framing engineered to withstand heavy tenant usage while maintaining pristine architectural appearance.
Urban acoustic attenuation is vital for premium multi-family living. Utilizing multi-layer acoustic laminated glass, perimeter EPDM weatherstripping, and dense polyurethane foam core infill, our security door systems achieve high STC (Sound Transmission Class) ratings up to STC 45, significantly reducing ambient traffic and hallway noise.
For coastal and hurricane-prone geographic regions, Grandex manufactures structural aluminum and steel composite entry systems verified under Miami-Dade NOA protocols and Florida Building Code guidelines. These systems resist heavy wind-borne debris, extreme wind pressure, and torrential water infiltration.
Explore our 35,000 m² smart manufacturing ecosystem featuring automated CNC precision machinery, digital sorting lines, and rigorous internal quality control testing.
Raw materials
Sawing
Milling
CNC Milling
CNC Drilling
CNC Center
Cutting
Intelligent Sorting
Checking & Packing
Sawing Machine
Milling Machine
CNC Milling Machine
CNC Drilling Machine
CNC Center Machine
Double Head Cutting Saw
Intelligent Sorting Line
Semi-Finished Inspection
Performance Tester
Pioneering the next era of fenestration engineering, integrating sustainable materials, smart access security, and extreme thermal isolation.
Integrating nano-porous aerogel insulation strips within polyamide structural break profiles, pushing U-values down to passive house standards (< 0.8 W/m²K) without altering slender profile visual widths.
Factory-embedded concealed wiring channels, electromagnetic lock pre-routing, and smart biometric sensor housing compatible with major enterprise building management systems (BMS).
Transitioning towards 100% recycled structural aluminum billets smelted using renewable hydro-power, providing low-carbon environmental product declarations (EPD) for LEED-certified projects.
Comprehensive regulatory alignment ensuring seamless customs clearance and structural engineering sign-offs in primary export markets.
Our engineering portfolio holds rigorous testing certifications required by US and Canadian building codes:
Designed to comply with rigorous European Norms (EN) for physical security, energy conservation, and safety:
Detailed insights into custom OEM engineering, technical specifications, and international trade protocols.
We provide full hardware integration, including multi-point mechanical mortise locks, electronic RFID keycard systems, biometric fingerprint scanners, and heavy-duty smart locks compatible with major smart-building access platforms (e.g., Salto, Yale, Dormakaba). Custom preparation cuts are executed using our 5-axis CNC machining centers to ensure precise fitment.
Thermal break aluminum security doors feature structural polyamide (PA66 GF25) barrier strips that isolate the inner and outer metal frames. This thermal barrier prevents heat transfer, significantly lowering U-factors, eliminating interior condensation, and ensuring compliance with strict energy codes such as California Title 24 and European EnEV standards.
Our standard OEM tooling and production cycle ranges from 25 to 35 days post structural CAD drawing approval and deposit receipt. For specialized custom finishes or hurricane impact laboratory verification orders, timelines are tailored accordingly. Bulk orders are containerized with protective film, foam corner guards, and ISPM-15 certified wooden crates to guarantee damage-free delivery.
Yes. Our active R&D division (comprising 85 specialized engineers) accommodates bespoke oversized structural openings, specialized sidelite configurations, transom panels, and decorative triple-pane insulated impact glass with custom grill patterns or Low-E coatings.
Our 45-member Quality Assurance team conducts strict multi-stage inspections certified under ISO 9001. This process includes raw material alloy spectral testing, automated CNC dimensional tolerance checks, structural frame corner tension testing, surface coating thickness measurement (AAMA 2605 standard), and air/water infiltration verification in our internal performance testing lab.
Complete your development projects with our complementary line of thermal break casement, awning, bi-fold, and sliding door solutions.
Grandex Door