Explore our premium-grade window and door selections engineered for extreme environments, energy conservation, and contemporary design specifications.
Established in 2014, Grandex Door Solutions Co., Ltd. operates as an elite entry door and aluminum window manufacturer from a state-of-the-art 35,000 m² production facility.
Grounding our success in robust OEM and ODM trade backgrounds, our high-performance fenestration products primarily serve North America and Western Europe. Backed by a stringent ISO 9001 certified internal testing system and verification from top-tier third-party laboratories, our dedicated 45-member QA team ensures strict quality control across every operational phase. Fueled by an active research division comprising 85 specialized engineers, we continually push technical boundaries—delivering full custom solutions that seamlessly match bespoke dimensions, high-security multi-point locking systems, advanced surface finishes, and insulated decorative glass configurations.
Precision engineering relies on flawless machinery. Explore our meticulous manufacturing workflow from raw material intake to rigorous performance testing.
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
Navigating complex international building codes while capitalizing on advanced material science and sustainable manufacturing trends.
Our aluminum casement windows are engineered to align with stringent regional standards including NFRC, California Title 24 energy requirements, Florida NOA hurricane specifications, and AS2047 codes. We offer complete technical documentation packages to ease municipal permitting for developers.
Leveraging China's mature industrial ecosystem, our massive 35,000m² facility integrates advanced automated extrusion, thermal break assembly, and CNC fabrication. This yields unmatched price-to-performance ratios and volume scalability for commercial procurement.
The global shift toward net-zero buildings drives high demand for thermal-break aluminum profiles combined with Low-E triple/double glazing. Smart integration, ultra-slim sightlines, and automated locking mechanisms represent the pinnacle of modern architecture.
Discover more specialized weather-resistant architectural solutions built for durability and sophisticated design aesthetics.
Expert answers regarding our custom OEM manufacturing capabilities and technical specifications.
Our products comply with international building standards including NFRC (National Fenestration Rating Council), California Title 24, Florida NOA, and AS2047. We supply rigorous test reports to ensure seamless local inspection approvals.
Yes. With our 35,000 m² modern manufacturing facility, 1,200+ supply chain partners, and 85 R&D engineers, we specialize in high-volume commercial wholesale, custom sizing, architectural color matching, and special hardware integrations.
Quality is managed via our ISO 9001 certified framework. Our 45-member dedicated QA team conducts strict inspections from raw material sourcing, CNC milling accuracy, semi-finished assembly checks, to final performance and packing audits.
Depending on order volume and specific customization requirements (such as thermal break profiles, special Low-E coatings, or custom hardware), standard production lead times range between 3 to 5 weeks, backed by efficient global logistics support.
Grandex Door
