About Us
Crafted with precision engineering, trusted by architectural professionals and importers across the globe.
Engineered for Strength, Designed for Architectural Beauty
Grandor Door Industry Co., Ltd. is a leading manufacturer of architectural thermal-break aluminum windows, commercial-grade sliding and folding doors, and premium front security entry doors. With over 18 years of specialized engineering expertise, we provide fully customized glazing systems to importers, project developers, architects, and wholesalers worldwide.
Operating a 155,000 m² integrated smart factory in Foshan, Guangdong, every critical stage — profile extrusion, automated vertical powder coating, safety glass tempering, and precision assembly — is executed entirely in-house. This single-source production model eliminates subcontractor delays, guarantees strict quality control, and delivers direct manufacturer pricing.
Each system is engineered to satisfy stringent global performance standards, offering superior thermal insulation (Low U-values), exceptional acoustic dampening, structural wind-load resistance, and water tightness for modern residential and commercial envelopes.
& Glass Tempering
Built for Overseas Importers, Developers & Contractors
Grandor Door Industry Co., Ltd. provides end-to-end OEM and ODM services, ensuring structural compliance, superior aesthetics, and seamless export fulfillment.
Premium Architectural Raw Materials
We source prime 6063-T5/T6 architectural aluminum alloy extrusions, PA66 polyamide thermal break strips, EPDM weather-sealing gaskets, and certified safety glass for long-term climate endurance.
Precision Automated CNC Production
Precision CNC cutting, automated corner crimping, and computerized hardware routing ensure ultra-tight tolerances, perfect sash operation, and seamless weather-seal compression.
Customized OEM/ODM Solutions
Frame dimensions, Low-E glass build-ups, Italian multi-point hardware, smart access controls, and custom powder-coated or wood-grain finishes are engineered to your exact project drawings.
Global Export Logistics
Streamlined logistics with heavy-duty protective wooden crating to ensure safe containerized transit directly to your job site.
Technical CAD & Remote Guidance
Detailed CAD shop drawings, video installation tutorials, and dedicated engineer consultation for smooth site execution.
Certified Quality Compliance
Operating under an ISO9001 quality management framework with products tested to meet AS2047, CE, NFRC, and ASTM standards.
Architectural Window & Door Product Range
Three core system families designed for modern structural envelopes, maximum thermal efficiency, and timeless architectural appeal.
Thermal-Break Aluminum Windows
High-performance window systems engineered for low thermal conductivity, structural integrity, and acoustic dampening. Available in casement, sliding, tilt & turn, awning, skylight, and double-hung designs.
- Polyamide thermal insulation strips
- Double & triple Low-E insulated glass
- Multi-point locking security systems
Heavy-Duty Aluminum Doors
Commercial and residential door systems featuring large opening spans, ultra-smooth heavy-duty rollers, slim frame sightlines, and robust weather sealing.
- Lift-and-slide, bi-fold & French doors
- Weather-sealed low threshold options
- High-cycle hardware durability
Front Security Entry Doors
Statement entrance doors crafted with reinforced alloy frames, concealed pivot hinges, multi-point smart locking systems, and elegant architectural surface textures.
- Pivot and heavy-duty swing options
- Smart keyless & biometric compatibility
- Wood-grain & metallic powder finishes
Frequently Asked Questions for Project Procurement
Essential guidelines regarding customization, lead times, warranties, shipping container capacity, and quality compliance from Grandor Door Industry Co., Ltd.
1. Can I purchase your products unfinished or unpainted for custom staining?
Yes. Grandor Door Industry Co., Ltd. can supply mill-finish or unpainted aluminum profiles and door units upon request, allowing project teams to perform custom on-site coating or staining.
2. How do you support technical installation for international projects?
We provide full technical support including detailed CAD shop drawings, step-by-step PDF installation manuals, video tutorials, and remote engineering guidance to assist installation crews on job sites globally.
3. What is the loading capacity of windows and doors in a 40-foot container?
A standard 40-foot high cube (40HQ) shipping container can hold approximately 400 square meters of assembled aluminum window and door units, packed in protective export wooden crates.
4. What is your standard manufacturing lead time?
Our standard production lead time is 30 to 35 days following final shop drawing confirmation and deposit receipt, depending on custom profile requirements and order volume.
5. What warranty policy is offered by Grandor Door Industry Co., Ltd.?
All products manufactured by Grandor Door Industry Co., Ltd. are backed by a comprehensive 5-year warranty covering frame structural performance, powder coating durability, and hardware functionality.
6. What is your Minimum Order Quantity (MOQ)?
Grandor Door Industry Co., Ltd. has no strict Minimum Order Quantity requirement. We accommodate both full-container wholesale project orders and smaller custom villa sample orders.
7. Does your manufacturing facility comply with ISO quality standards?
Yes. Our entire production system has been ISO 9001 certified since 2016. Products are engineered and tested to satisfy AS2047, CE, NFRC, and ASTM performance criteria.
8. Do you offer complete OEM and ODM services?
Yes. We offer complete OEM and ODM services. Our technical engineering team custom-fabricates window and door systems according to your exact architectural drawings, performance specs, and local building codes.