Explore our flagship structural fenestration solutions, rigorously tested to meet North American NFRC/Miami-Dade NOA, Australian AS2047, and European CE structural and thermal standards.
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.
Unlike standardized retail suppliers, Grandex operates an enterprise-grade OEM/ODM custom engineering pipeline. Our 85-member R&D team provides complete CAD/BIM architectural shop drawings within 48 hours, customized profile extrusion development, custom anodization or AkzoNobel powder coating (AAMA 2605 compliant), multipoint mechanical/smart biometric lock system integrations, and engineered structural glass configurations tailored to hurricane, acoustic, or extreme thermal boundary conditions.
Modern luxury residential and commercial architecture demands seamless aesthetic integration without compromising structural stability, thermal insulation, or envelope security. Grandex engineers custom door and window systems to solve high-complexity architectural challenges.
Designed for coastal hurricane zones (including Florida HVHZ and Caribbean regions), our doors feature reinforced 6063-T6 aluminum extrusions, heavy-gauge corner cleats, and laminated impact glass options capable of withstanding design pressures up to 96 PSF. Certified under Miami-Dade NOA standards, these systems prevent envelope failure during severe meteorological events.
To combat thermal bridging in modern minimal-frame doors, Grandex utilizes glass-fiber reinforced Polyamide 66 (PA66GF25) thermal struts. Combined with Argon-filled Low-E double or triple glazing, our products achieve ultra-low U-factors (as low as 0.24 Btu/h·ft²·°F), meeting California Title 24 and North American NFRC energy codes.
Urban luxury villas and high-traffic commercial storefronts require high acoustic isolation. Utilizing continuous multi-point EPDM perimeter gaskets, asymmetrical acoustic laminated glass panes, and vibration-dampening hardware, Grandex door systems reduce ambient noise intrusion by up to 45 dB.
| Performance Benchmark | Grandex Villa Door Standard | Industry Standard Baseline | Relevant International Standard |
|---|---|---|---|
| Structural Wind Load | Up to 96 PSF (+/- 4600 Pa) | 35 - 50 PSF | ASTM E330 / Miami-Dade NOA |
| Thermal Transmittance (U-Value) | 0.22 - 0.28 Btu/h·ft²·°F | 0.45 - 0.60 Btu/h·ft²·°F | NFRC 100/200 / ISO 10077 |
| Air Infiltration Resistance | < 0.01 cfm/ft² @ 6.24 psf | < 0.30 cfm/ft² | AAMA/WDMA/CSA 101/I.S.2/A440 |
| Water Penetration Resistance | 15 PSF (720 Pa) Zero Leakage | 8 - 10 PSF | ASTM E547 / AS2047 |
| Surface Coating Longevity | Fluorocarbon AAMA 2605 (20+ Yrs) | Standard Powder Coating AAMA 2603 | Qualicoat Class 2 / AAMA 2605 |
Our 35,000 m² smart manufacturing center operates with strict ISO 9001 quality management systems. Every door panel and frame undergoes 16 automated machining processes and double-stage QC inspection.
Supported by strict ISO 9001 certified internal testing and third-party laboratory verification, our 45-member QA team ensures zero-defect quality across dimensional tolerances, coating adhesion, hardware cycling, and water tightness.
Exporting to over 50 countries across North America, Western Europe, and Oceania, Grandex designs engineered doors fully compliant with regional building codes and extreme local environmental conditions.
Full compliance with NFRC thermal testing (U-Factor & SHGC), Miami-Dade NOA impact standards for High-Velocity Hurricane Zones (HVHZ), California Title 24 energy code, and AAMA/WDMA/CSA 101/I.S.2/A440 structural specifications.
Engineered according to EN 14351-1 fenestration standards, carrying official CE marking and UKCA conformity. Featuring multi-layer warmth sealing, low frame U-values designed for Passive House residential specifications.
Rigorously tested under AS2047 (Windows and External Glazed Doors in Buildings) and AS1288 glass installation codes. Specialized sub-sill drainage setups to handle high rainfall, marine salt-spray, and coastal UV radiation.
Grandex custom door systems are specified across elite residential, resort hospitality, and high-traffic commercial real estate projects worldwide.
Coastal properties face extreme atmospheric challenges: high humidity, salt fog corrosion, and tropical storms. Our D2015/AAMA 2605 powder coatings resist salt spray corrosion for over 3,000 hours without blistering, while our heavy-duty pivot and bifold doors connect indoor luxury living spaces directly with ocean vistas.
In sub-zero alpine locations, energy retention and ice-damming prevention are critical. Grandex multi-chambered thermal break profiles with Warm-Edge spacer triple glazing eliminate internal condensation, keeping villa interiors warm while dramatically reducing HVAC heating energy consumption.
Featuring ultra-slim sightlines, flush floor tracks, and hidden drainage profiles, our stacker pocket and pivot doors maximize natural light influx without compromising perimeter structural strength or multi-point mechanical security locking mechanisms.
Designed for boutique hotels, corporate headquarters, and high-end retail malls. We supply commercial storefront window walls with 96PSF load ratings, paired with panic hardware emergency escape systems certified for high occupant egress and fire safety compliance.
Driven by our 85-engineer strong R&D team, Grandex continues to pioneer next-generation building envelope technologies, pushing the boundaries of intelligence, sustainability, and ultra-low energy architecture.
Developing ultra-thin VIG glazed door sashes that achieve a U-value of 0.10 Btu/h·ft²·°F in a slim 10mm glass profile, matching solid insulated wall thermal performance while retaining maximum optical transparency.
Seamlessly embedding facial recognition, encrypted fingerprint sensors, dynamic privacy electrochromic glass control, and motor-driven concealed drive actuators directly into the aluminum door frame structure.
Transitioning our production line to 75%+ post-consumer recycled hydroelectric-smelted aluminum extrusions, significantly lowering embodied carbon footprints to achieve LEED v4 and BREEAM Gold project requirements.
Expert guidance for architects, facade consultants, building owners, and general contractors specifying Grandex villa entry systems.
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