Explore engineered entry systems, certified hurricane impact double doors, and energy-efficient commercial glazing systems designed for North American and European building codes.
Combining 16 years of domain mastery with intelligent automated manufacturing to deliver certified modern entry door systems globally.
Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door manufacturer operating from a modern 35,000 m² state-of-the-art 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 demanding construction sectors in North America and Western Europe, supported by an expansive global network of over 1,200 supply chain partners.
We cater directly to leading building material distributors, real estate developers, architectural engineering firms, 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 every phase of 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, high-security locking hardware, advanced surface finishes, and decorative insulated glass panels.
An in-depth analysis of global commercial demands, structural wind-load requirements, thermal efficiency benchmarks, and advanced metallurgical engineering.
In modern architectural design, the entrance serves as both a primary aesthetic focal point and the first line of defense for envelope integrity. Global building codes in North America and Western Europe have tightened regulations regarding dynamic wind pressures, thermal bridging, and forced-entry deterrence. Modern double entry doors—utilizing heavy-duty extruded aluminum profiles, thermally broken frames, and multi-layer tempered dynamic glazing—have transitioned from decorative luxury items to critical architectural structural elements.
Commercial developers and high-end residential builders increasingly specify double entry doors because of their operational flexibility. Offering dual active leaf configurations, large clear opening dimensions (frequently exceeding 2.4 meters in height and 1.8 meters in width), and seamless integration with smart biometric access control systems, double entry systems provide structural dignity and high traffic throughput necessary for luxury villas, boutique hotels, and headquarters office entrances.
China has solidified its position as the premier manufacturing engine for technical architectural glazing and structural door assemblies. The efficiency advantage stems from dense industrial clustering in aluminum profile extrusion, surface anodizing, EPDM sealing manufacturing, and high-precision CNC machinery fabrication within single industrial zones.
Grandex Door Solutions leverages this supply ecosystem to offer unparalleled OEM/ODM production speed and cost efficiency. By integrating 5-axis CNC machining centers, automated double-head cutting saws, and automated sorting lines directly with ISO 9001 quality testing procedures, Grandex delivers custom door dimensions and custom structural hardware preparation at lead times up to 40% shorter than European legacy manufacturers.
| Engineering Attribute | Standard Entry Systems | Grandex Modern Double Entry Doors | Testing Standard / Certification |
|---|---|---|---|
| Structural Profile Material | Standard Non-Thermal Aluminum (6063-T5) | High-Tensile Thermal Break Aluminum Alloy (6063-T6) | ASTM B221 / GB 5237.6 |
| Hurricane Wind Resistance | 30 - 45 psf Design Pressure | Up to 90 psf (HVHZ Certified) | Miami-Dade NOA / TAS 201, 202, 203 |
| Glazing Specification | Single or Double Tempered Glass | Double/Triple Laminated Low-E Argon-Filled Impact Glass | NFRC / IGCC Certified |
| Locking Mechanism | Single Point Latch / Standard Deadbolt | German Multi-Point Lock & Smart Biometric Integration | EN 12209 Class 7 Security |
| Weather Stripping | Standard PVC Seals | Triple EPDM Synthetic Rubber + Continuous Silicone Gaskets | AAMA 701/702 |
| Thermal Transmittance (U-Value) | > 0.45 Btu/h·ft²·°F | ≤ 0.22 - 0.26 Btu/h·ft²·°F | NFRC 100 Thermal Performance |
Our 35,000 m² facility features automated CNC centers, intelligent sorting lines, and rigorous multi-stage performance testing to guarantee exact architectural tolerances.
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
Understanding regional certification standards, custom OEM specifications, and logistics safety protocols for high-value architectural shipments.
In coastal jurisdictions such as Florida, Texas, and the Carolinas, exterior entry double doors must meet stringent high-velocity hurricane zone (HVHZ) requirements. Grandex products certified under Miami-Dade NOA and Florida Product Approval utilize SentryGlas® (SGP) interlayer glass that resists impact from airborne debris and withstands cyclic wind loads up to ±90 psf without seal failure.
European developments prioritize structural thermal insulation and low carbon footprint materials. Grandex double entry doors engineered for Western Europe incorporate multi-chamber polyamide thermal break strips, triple-pane Low-E glass filled with 90% Argon gas, and perimeter EPDM compression weather-stripping to satisfy strict Passive House U-value targets (≤ 0.8 W/m²K).
Procuring custom aluminum double entry doors and fenestration products from overseas requires precise quality milestone tracking. Grandex Door Solutions provides commercial procurement teams with end-to-end operational clarity:
Expert answers regarding technical specifications, custom manufacturing capabilities, certifications, and international delivery terms.
Grandex entry systems hold rigorous international certifications including Miami-Dade NOA (Notice of Acceptance) for high-velocity hurricane zones, Florida Product Approval, AAMA/WDMA/CSA 101/I.S.2/A440 rating compliance, and NFRC energy performance certification for U-Factor and SHGC values.
Yes. Our R&D team works with leading lock hardware systems including German GU, Hopo, Siegenia, as well as digital biometric, keypad, and smart IoT access control solutions, custom-milled into aluminum door stiles during production.
Thermal break aluminum features a reinforced polyamide (PA66) barrier between interior and exterior aluminum profiles. This drastically stops heat transfer, reduces building HVAC cooling/heating costs, eliminates condensation formation on indoor frames, and provides superior acoustic dampening.
For custom CAD approved orders, standard manufacturing lead time is approximately 25 to 35 days. For standard stock architectural profiles, lead times can be reduced to 15-20 days, depending on hardware custom finishes.
We supply a wide spectrum of glass solutions, including double or triple insulated glazing, Low-E dynamic coatings, tempered safety glass, tinted/reflective glass, frosted privacy glass, and SGP laminated hurricane impact glass custom-built to project specs.
Grandex provides a comprehensive 10-year warranty covering aluminum profile structural integrity and surface finishes, along with a 5-year warranty on hardware accessories and insulated glass seals.
Select from our complete line of luxury aluminum pivot doors, windproof sliding systems, and hurricane-rated casement entrance doors.
Grandex Door