Explore our core product portfolio featuring advanced thermal break insulation, hurricane-impact resistance, and custom fenestration engineering.
Grandex Door Solutions Co., Ltd. combines advanced manufacturing, rigorous QA standards, and extensive export experience to deliver top-tier architectural door solutions worldwide.
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.
Engineered for extreme weather environments, our high-impact entrance doors comply with Miami-Dade NOA and Florida Building Code (HVHZ TAS 201/202/203) standards, capable of enduring wind pressures exceeding 90 PSF.
Featuring multi-cavity thermal break extrusions with Polyamide PA66 GF25 insulation strips, achieving exceptionally low U-factors (down to 0.18 BTU/h·ft²·°F) to meet strict NFRC and Energy Star specifications.
Powered by an 85-engineer R&D division and state-of-the-art multi-axis CNC machining centers, providing seamless tailor-made customization for commercial blueprints, high-end residential towers, and hospitality projects.
In modern commercial and high-density residential architectural design, the exterior entry system serves as both a primary aesthetic signature and a structural envelope defense mechanism. International procurement leaders—ranging from North American building material distributors to European general contractors—face complex regulatory, thermal performance, and security challenges. Sourcing front doors from China is no longer merely a cost-reduction strategic move; it has evolved into a value-engineering partnership focused on technological innovation, scale reliability, and compliance optimization.
Information Gain Insight: Modern wholesale door buyers require more than standard structural extrusions. The global market demands unified architectural systems integrated with smart access security, solar energy management, acoustic insulation (STC ratings over 42 dB), and hurricane wind-load resistance without compromising visual elegance.
1. North America (USA & Canada): Driven by stringent regional building codes such as the Florida Building Code (FBC) and California Title 24, commercial developments demand High Velocity Hurricane Zone (HVHZ) certifications, TAS 202 structural loading, and NFRC-certified U-factors. B2B buyers prioritize suppliers capable of delivering factory-glazed, pre-hung entrance door systems that minimize jobsite labor overhead.
2. Western Europe (UK, Germany, France, Nordics): Thermal efficiency dominates purchasing criteria. High-performance aluminum entry systems must feature multi-cavity thermal breaks, triple-glazed Low-E glass units filled with Argon gas, and achieve passive-house level thermal insulation. In addition, PAS 24 security certification and CE Marking (EN 14351-1) are imperative prerequisites for enterprise tenders.
3. Middle East & Coastal Regions: Coastal and high-temperature environments require high-durability surface finishes such as AAMA 2605 fluorocarbon PVDF coatings and anodized treatments to resist intense UV radiation, high salinity atmospheric corrosion, and sandstorm abrasion.
Grandex Door Solutions integrates advanced materials technology into architectural entrance manufacturing. By utilizing 6063-T5/T6 structural aluminum alloys, reinforced steel internal cores, and high-performance polyurethanes, our engineering team manufactures front doors that deliver superior structural integrity and minimal dimensional creep over decades of exposure.
To assist procurement managers and project engineers in specifying optimal entry systems, the matrix below details key performance metrics across our flagship door categories:
| Door Category / Series | Frame Material & Spec | Thermal Insulation (U-Factor) | Impact & Wind Rating | Acoustic Rating (STC) | Target Applications |
|---|---|---|---|---|---|
| HVHZ Hurricane Impact Entrance Door | 6063-T6 Aluminum (3.0mm wall) | 0.24 - 0.28 BTU/h·ft²·°F | Miami-Dade NOA / 90 PSF | STC 40 - 45 dB | Coastal Mansions, Commercial Plazas, Luxury Resorts |
| Thermal Break Sliding & Stacker Series | Multi-Cavity PA66 Structural Alloy | 0.18 - 0.22 BTU/h·ft²·°F | ASTM E330 (60 PSF) | STC 38 - 42 dB | Modern Villas, Corporate Offices, Penthouse Balconies |
| Heavy-Duty Architectural Bifold Doors | High-Tensile Aluminum (2.5mm wall) | 0.26 - 0.30 BTU/h·ft²·°F | DP 55 Structural Rating | STC 35 - 40 dB | Hospitality Venues, Restaurant Outlets, Residential Patios |
| Commercial Storefront Swing Doors | Standard/Thermal Aluminum (2.0mm) | 0.32 - 0.38 BTU/h·ft²·°F | Standard Commercial Load | STC 32 - 36 dB | Retail Stores, Hotel Lobbies, Public Facilities |
Inside our 35,000 m² factory: Automated multi-axis CNC machining, intelligent sorting, and rigorous ISO 9001 quality testing procedures.
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 inspection
Performance tester
Navigating global building codes requires robust technical verification. Grandex Door Solutions operates an internal laboratory certified alongside ISO 9001 protocols, backed by international third-party testing partners including Intertek, SGS, and TUV.
Every front door assembly undergoes an intensive 6-stage quality inspection standard prior to dispatch:
We work directly with architects, estate developers, and wholesale buyers to deliver tailored entrance solutions:
Discover additional high-efficiency window and entrance products engineered for global commercial and residential applications.
Technical clarifications, wholesale ordering logistics, structural certifications, and custom manufacturing inquiries.
Our front doors and architectural systems are tested to meet major international standards. For North America, we provide products tested for NFRC thermal ratings, Florida Building Code (HVHZ TAS 201/202/203 impact ratings), and ASTM structural compliance. For European markets, our products conform to CE Marking under EN 14351-1 and PAS 24 security protocols.
For standard wholesale profiles and custom developer projects, our typical MOQ starts at 20 sets or one 20ft container equivalent. Sample prototype orders are supported. Production lead times generally range from 25 to 35 calendar days following shop drawing approval and deposit receipt.
We utilize structural Polyamide PA66 GF25 thermal struts imported from top-tier suppliers. These non-conductive barriers physically isolate the exterior and interior aluminum profiles, drastically reducing thermal conduction and preventing interior condensation under heavy temperature differentials.
Yes. Our 85-member R&D engineering team frequently designs custom hardware pre-machining into our CNC center workflows. We seamlessly integrate German-engineered multi-point locks (Hoppe, Siegenia, GU) as well as modern biometric, keypad, and smart home IoT access systems.
Our 45-member QA team conducts multi-phase inspections including raw aluminum alloy verification, profile coating thickness checks, air and water tightness pressure chamber testing, corner joint structural torque tests, and 100% pre-assembly inspection before crating.
We back our aluminum door frames with a 10-year structural warranty and a 5-year hardware component warranty. We provide comprehensive CAD shop drawings, installation guidance manuals, replacement hardware kits, and dedicated engineering support for large commercial tenders.
Grandex Door