Engineered test prototypes and factory-direct aluminum sliding solutions certified for North American and European building codes.
Grandex Door Solutions Co., Ltd. is an industry-leading architectural aluminum sliding door manufacturer powering global distribution and commercial construction projects.
Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door and architectural glazing manufacturer operating from a state-of-the-art 35,000 m² production complex. Backed by 16 years of deep-seated industry expertise and 8 years of dedicated international export operations, the company achieves an annual export revenue of USD 28 million. Grounded in robust OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) frameworks, our engineered fenestration products primarily serve Tier-1 developers, architectural specifiers, and building material distributors across North America and Western Europe.
Quality control forms the core of our manufacturing philosophy. Supported by strict ISO 9001 certified internal testing protocols and independent third-party laboratory verifications (NFRC, Intertek, AAMA), our 45-member Quality Assurance team monitors raw profile extrusions, glass lamination, thermal strip crimping, and mechanical hardware assembly. Driven by an active R&D division boasting 85 specialized architectural engineers, Grandex launched 120 custom sliding door designs last year alone, delivering tailor-made solutions across precise structural dimensions, high-security multipoint locks, specialized fluorocarbon surface finishes, and decorative insulated glass units.
Advanced CNC machining centers, automated double-head cutting saws, and intelligent sorting lines ensure micro-level accuracy for high-performance aluminum sliding systems.
Bridging thermodynamic performance with structural integrity through advanced material science and digital fabrication.
To meet strict net-zero building envelope codes, Grandex utilizes PA66GF25 (Polyamide 66 reinforced with 25% fiberglass) thermal break strips. By separating the interior and exterior aluminum profiles, our systems minimize heat transfer, reducing overall frame U-factors to ≤ 0.24 Btu/h·ft²·°F. This structural insulation eliminates interior condensation while preserving profile shear strength against dynamic wind loads.
Designed specifically for severe weather zones, our hurricane impact-resistant sliding doors undergo rigorous TAS 201 (Large Missile Impact), TAS 202 (Static Air Pressure), and TAS 203 (Cyclic Wind Pressure) testing. Incorporating SentryGlas® (SGP) structural interlayers and heavy-gauge 6063-T6 aluminum extrusion walls (up to 3.0mm thickness), our doors withstand design pressures exceeding +90/-90 PSF.
Meeting modern architectural demand for panoramic glass expanses, our minimalist slim-frame series features ultra-thin vertical interlocks as narrow as 20mm. Structural integrity is maintained via internal carbon-fiber reinforced steel stiffeners, while double-sealed EPDM weatherstripping guarantees watertightness under driven-rain conditions.
| Engineering Metric | Standard Aluminum Sliding Door | Grandex Thermal Break System | Grandex Extreme Hurricane Impact |
|---|---|---|---|
| Thermal Transmittance (U-Factor) | 0.55 - 0.70 Btu/h·ft²·°F | 0.22 - 0.28 Btu/h·ft²·°F | 0.26 - 0.32 Btu/h·ft²·°F |
| Acoustic Isolation (STC / OITC) | STC 26 - 30 dB | STC 38 - 42 dB | STC 43 - 48 dB |
| Design Wind Load Pressure | 35 - 45 PSF | 60 - 75 PSF | 90 - 110 PSF (Miami-Dade Approved) |
| Glazing Pocket Thickness | 5mm - 18mm Single/IGU | 28mm - 38mm Double/Triple Low-E | 32mm - 44mm SGP Laminated IGU |
| Air Leakage & Water Tightness | 300 Pa / ASTM E283 | 600 Pa / ASTM E331 | 1050 Pa High-Pressure Water Barrier |
Tailored fenestration systems configured for distinct structural, environmental, and regulatory environments worldwide.
High-rise coastal towers demand sliding doors capable of resisting massive wind shear without compromising view aesthetics. Grandex integrates heavy-duty Lift & Slide hardware mechanisms that allow multi-panel glass doors weighing up to 400 kg per panel to glide effortlessly. Stainless steel quad-roller tracks ensure silent glide cycles exceeding 100,000 operations.
Hotel project developers prioritize acoustic control, thermal efficiency, and minimal long-term maintenance. Our commercial sliding door packages feature acoustic laminated glass matrixes that dampen exterior ambient noise (traffic, airport proximity, beach surf) by up to 45 dB, ensuring optimal guest comfort.
Navigating global building codes requires strict certification compliance and localized engineering adaptation.
Fully testing to AAMA/WDMA/CSA 101/I.S.2/A440 standards. Thermal simulation validated through NFRC (National Fenestration Rating Council) modeling for U-Factor, Solar Heat Gain Coefficient (SHGC), and Visible Transmittance (VT). Florida Miami-Dade NOA compliance for high-velocity hurricane zones (HVHZ).
CE marked under EN 14351-1 fenestration directives. Acoustic testing certified via ISO 10140 standards. Air permeability (EN 12207 Class 4) and watertightness (EN 12208 Class E1050) ensuring seamless integration into European Passive House constructions.
Engineered to AS2047 (Windows and External Glazed Doors in Buildings) and AS1288 (Glass in Buildings). Custom frame drain paths adapted for intense precipitation and cyclonic regions in North Queensland and Western Australia.
Why leading real estate developers and building material distributors partner with Grandex for turnkey OEM/ODM manufacturing.
Located within China’s premier industrial manufacturing corridor, Grandex leverages a strategic ecosystem of over 1,200 specialized supply chain partners. Direct integration with primary aluminum smelters (using 6063-T6 virgin billets) guarantees competitive raw material pricing. Controlled in-house extrusion, anodizing, powder coating, and insulating glass unit (IGU) assembly remove middleman margins, passing a 15-25% cost advantage to enterprise buyers without compromising quality metrics.
Every production batch undergoes strict multi-tier quality control. Incoming Quality Control (IQC) verifies profile alloy composition and glass clarity. In-Process Quality Control (IPQC) utilizes laser-guided alignment tools during CNC milling and corner crimping. Final Quality Control (FQC) subjects assembled sliding doors to water immersion pressure tanks, structural deflection sensors, and 500-hour salt spray corrosion testing before seaworthy plywood crate packaging.
Explore our complete range of customizable stacker, lift-and-slide, trackless, and hurricane impact aluminum sliding door series.
Expert insights addressing key architectural, thermal, and mechanical queries for B2B sliding door sourcing.
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