Grandex Door
Engineered to withstand extreme weather conditions while delivering sleek modern aesthetics for luxury residential and commercial developments.
Grandex Door Solutions Co., Ltd. combines advanced metallurgical engineering, automation, and global compliance standards to serve tier-1 construction ecosystems worldwide.
Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door and garage door manufacturer operating from a state-of-the-art 35,000 m² smart manufacturing facility. Grounded in 16 years of structural fenestration expertise and 8 years of dedicated international export operations, the enterprise maintains an annual export volume exceeding USD 28 million. Supported by a robust OEM and ODM foundation, our advanced architectural products primarily supply top-tier building material distributors, real estate developers, and commercial contractors throughout North America, Western Europe, and Australia.
Quality management is embedded in every manufacturing phase: our ISO 9001:2015-certified internal testing laboratories work in tandem with accredited third-party testing facilities (including Intertek, CSA, and NFRC). A specialized 45-member Quality Assurance (QA) team controls every tolerance from billet extrusion to micro-seal assembly. Furthermore, our 85-engineer Strong R&D Division introduced over 120 certified custom door designs last year, offering complete tailored engineering—spanning extreme load wind-resistance calculations, anti-burglary multi-point locking systems, fluoropolymer surface coatings, and thermal-break double-laminated impact glass assembly.
Our automated, digitalized production infrastructure ensures sub-millimeter precision tolerance, structural reliability, and scalable capacity for large-scale international projects.
An authoritative analysis of structural frame mechanics, hurricane impact glass technology, thermal insulation systems, and automated hardware integration.
Commercial and luxury residential garage doors require extreme strength-to-weight ratios to handle broad spans without sagging or twisting under high wind loads. Grandex utilizes 6063-T6 and 6065-T5 architectural grade extruded aluminum alloys. These extrusions undergo artificial aging treatment to achieve a tensile strength of over 205 MPa and a yield strength exceeding 170 MPa.
Surface protection features advanced fluoropolymer (PVDF) powder coating or hard-anodized treatments exceeding 25 microns in thickness. This ensures comprehensive protection against salt spray oxidation (tested to 3,000 hours ASTM B117 standards), UV degradation, and chemical pollutants typical of coastal and industrial environments.
Our Miami-Dade NOA certified glass garage doors utilize high-grade laminated security glass featuring DuPont SentryGlas® (SGP) or PVB interlayers sandwiched between tempered heat-strengthened glass panels. Under severe storm conditions, even if the exterior glass fractures upon impact from flying debris, the structural interlayer maintains spatial integrity, maintaining structural resistance up to +/- 90 PSF (Pounds per Square Foot) Design Pressure.
Double-insulated units (IGU) integrate argon gas fill, warm-edge stainless steel spacers, and Low-E coatings to achieve solar heat gain coefficients (SHGC) as low as 0.22, dramatically lowering HVAC operational costs for air-conditioned garage spaces.
Traditional single-extrusion aluminum doors suffer from thermal bridging, causing heat transfer into the building structure. Grandex solves this through multi-cavity thermal break extrusions featuring structural Polyamide 66 reinforced with 25% fiberglass (PA66-GF25).
This design isolates exterior thermal conditions from interior climate zones, achieving door system U-factors down to 0.28 BTU/h·ft²·°F. Integrated EPDM perimeter weather-stripping and heavy-duty bottom tube seals prevent air infiltration and water intrusion even under driving rain conditions exceeding 12 PSF static water pressure.
Equipped with commercial-grade direct-drive motorization systems, our doors support integration with Building Management Systems (BMS), Smart Home protocols (Z-Wave, Zigbee, Wi-Fi), and industrial access control nodes. Torsion spring mechanisms are calibrated for extended operational lifecycles ranging from 25,000 to 100,000 duty cycles.
Safety features include dynamic photo-electric safety curtains, dual anti-drop spring brake systems, and intelligent obstruction sensing with automatic reverse mechanisms compliant with UL 325 and CE machine safety directives.
| Performance Characteristic | Grandex Standard Series | Grandex Hurricane Impact Series | Grandex Commercial Heavy-Duty |
|---|---|---|---|
| Wind Pressure Resistance | DP30 - DP45 (+/- 1.5 - 2.1 kPa) | DP70 - DP90 (+/- 3.3 - 4.3 kPa) | DP60 - DP80 (+/- 2.8 - 3.8 kPa) |
| Aluminum Profile Alloy | 6063-T5 (1.8mm wall thickness) | 6063-T6 (2.5mm - 3.0mm wall thickness) | 6065-T5 (3.0mm - 4.0mm wall thickness) |
| Glazing Specification | 5mm + 12A + 5mm Tempered Low-E | 6mm Tempered + 1.52 SGP + 6mm Tempered | 8mm Tempered + 16A + 8mm Laminated |
| Corrosion Protection | Powder Coating (1,000 hr Salt Spray) | PVDF Coating (3,000 hr Salt Spray) | Fluoropolymer Fluorocarbon Finish |
| International Compliance | ISO9001, CE, AS2047 | Miami-Dade NOA, Florida Product Approval | CodeMark, UL325, EN 13241-1 |
Navigating regional building codes demands deep technical compliance. We engineering doors tailored to local statutory mandates across key international markets.
Our hurricane-rated aluminum garage doors are verified under High Velocity Hurricane Zone (HVHZ) requirements. Compliant with Miami-Dade County Notice of Acceptance (NOA) and Florida Building Code (FBC) testing protocols (TAS 201, 202, 203 large missile impact testing). NFRC thermal certification enables seamless integration into US energy efficiency rebate initiatives.
Specifically engineered for Australian coastal wind zones and extreme radiation conditions. Products are certified under AS2047 (Windows and doors in buildings) and AS1288 (Glazing in buildings), verified by independent NATA-accredited testing laboratries for structural deflection, air infiltration, and water penetration resistance.
Full conformance with European Construction Products Regulation (CPR 305/2011) and EN 13241-1 standards for industrial, commercial, and garage doors. Includes anti-crushing safety compliance, electromagnetic compatibility (EMC) for drives, and certified thermal transmittance calculations (EN ISO 10077-1).
Tailored production workflows, direct engineering support, and optimized freight logistics designed for high-volume commercial purchasers.
We work directly with architectural teams, structural engineers, and general contractors from schematic CAD/BIM drawing phases to final installation. Customizable variables include:
To eliminate damage during ocean transit, Grandex utilizes multi-stage protective packaging: standard steel-reinforced wooden crates, plastic film vacuum wrapping, and corner impact foam buffers. Our logistics division optimizes container space utilization (20GP, 40GP, 40HQ), reducing freight costs per unit by up to 18% for large-scale shipments.
Clear technical answers addressing critical engineering, compliance, and supply chain considerations for commercial buyers.
Miami-Dade Notice of Acceptance (NOA) is recognized globally as the most rigorous standard for windborne debris and structural load resistance. To achieve NOA certification, our garage doors undergo destructive testing under TAS 201 (Large Missile Impact Test), TAS 202 (Static Air Pressure), and TAS 203 (Cyclic Wind Pressure Loading). This ensures the door remains intact during Category 5 hurricanes without blowing inward or detaching from the tracks, safeguarding the structural integrity of the entire building envelope.
DuPont SentryGlas® (SGP) interlayers are 5 times tougher and up to 100 times stiffer than standard Polyvinyl Butyral (PVB) interlayers. While PVB laminate holds glass fragments together upon fracture, SGP maintains structural rigidity even if both glass layers break, preventing the door panel from collapsing under extreme cyclic hurricane force winds. SGP is also highly resistant to moisture ingress, preventing edge delamination in humid marine environments.
Aluminum is naturally a highly conductive metal. A thermal break door frame incorporates a low-conductive polyamide material (PA66-GF25) inserted between the interior and exterior aluminum extrusions. This continuous thermal barrier drastically reduces heat transfer (lowering U-factor ratings), prevents condensation formation on interior frame surfaces, and maintains stable garage interior temperatures, resulting in substantial HVAC energy savings.
For standard custom orders, our minimum order quantity is 1 unit for luxury custom residential projects or 5-10 units for commercial distributor shipments. Standard production lead time is 25 to 35 calendar days following shop drawing approval and deposit receipt. Expedited 15-day manufacturing cycles are available for urgent commercial contract requirements.
We employ a multi-layer surface protection strategy: extrusions receive a chromate pretreating conversion coating followed by a high-grade Fluoropolymer PVDF liquid coating or thermosetting architectural powder coating. All assembly hardware (hinges, tracks, fasteners, rollers) is constructed from 304 or 316 marine-grade stainless steel or heavy galvanized steel rated for 3,000+ hours of continuous salt spray exposure per ASTM B117 standards.
Yes. Our motor drive controllers are fully compatible with dry-contact relay logic, RS485 communication, Modbus, Wi-Fi, and Bluetooth protocol hubs. They interface seamlessly with third-party commercial security systems, automated parking management setups, and smart home automation platforms like Control4, Crestron, and Savant.
Every door system undergoes a rigorous 5-stage quality audit: 1) Spectrographic aluminum alloy verification, 2) Powder coating mil thickness and cross-hatch adhesion testing, 3) Complete pre-assembly fitment checks, 4) Cycle testing for track dynamic motion, and 5) Pressurized water infiltration testing on sample production units within our 45-member QA division.
Complement your garage door installations with engineered aluminum architectural windows, awning systems, single hung units, and thermal casement systems.
