Frequently Asked Questions

Guangdong Derki Doors & Windows Technology Co., Ltd. is a direct, vertically integrated door manufacturer with over 25 years of continuous operational experience headquartered in Foshan, Guangdong Province, China.

Our expansive 180,000 square meter state-of-the-art production complex houses modern CNC machining hubs, automated surface coating systems, and high-precision welding workshops staffed by over 600 skilled technicians and engineers. By working directly with our factory, overseas buyers eliminate middleman markups while receiving total specification authority, factory-direct wholesale pricing, strict ISO 9001 quality assurance, and single-source project accountability.

We manufacture four high-performance entry door collections tailored to diverse climates, architectural styles, and security levels:

• Aluminum Alloy Entry Doors: Lightweight yet structurally rigid profiles featuring thermal-break technology, multi-point locking systems, and contemporary pivot or hinged configurations.
• Cast Aluminum Entry Doors: Ultra-heavy-duty main entrance gates and luxury villa doors offering rich 3D artistic relief patterns and anti-corrosion copper/bronze finishes.
• Stainless Steel Entry Doors: Maximum security doors engineered for forced-entry resistance, high-traffic commercial portals, and demanding coastal applications.
• Glass Entry & Large Pivot Doors: Architectural daylight entryways combining heavy-duty floor pivot hardware with tempered safety glass units.

Engineered compliance is a core foundation of our international supply record. All products manufactured by Guangdong Derki Doors & Windows Technology Co., Ltd. undergo rigorous testing at certified third-party laboratories.

Our key international compliance certifications include:

• AS2047 (N6 Rating): Australia's top standard for structural wind load, air infiltration, and water resistance, verified for severe weather and cyclone regions.
• CE Marking: Certified safety, health, and environmental conformity for European Union market access.
• UL Fire Rating: Tested fire-resistant door assemblies built to meet North American commercial fire codes.
• ISO 9001: Certified quality management systems overseeing every manufacturing stage.

Official test documentation and engineering submittals are supplied prior to shipment to ensure seamless approval by local building inspectors.

Getting a factory-direct quotation is simple and straightforward. Send your architectural door schedule, CAD drawings, or project elevation sketches directly to our engineering team at [email protected].

Please specify your preferred door dimensions, frame materials, glazing type, surface treatment (such as powder coating, anodizing, or wood-grain transfer), and locking hardware requirements. Our in-house engineers will review your submittal and issue detailed B2B wholesale pricing alongside free 2D/3D CAD shop drawings within 24 to 48 hours for technical confirmation before manufacturing begins.

Our standard manufacturing lead time ranges between 25 and 35 calendar days following deposit confirmation and final CAD shop drawing sign-off. For large-scale multi-unit commercial orders, we provide structured batch-delivery schedules aligned with your construction timelines.

To prevent ocean freight transit damage, every door undergoes multi-layer export packaging: protective anti-scratch surface film, reinforced edge guards, moisture-barrier wrapping, and heavy-duty fumigated wooden crates suitable for LCL or FCL ocean container transport worldwide.

We provide full technical support throughout the operational lifecycle of your project:

• 24/7 Technical Support: Our fluent English-speaking engineers offer real-time remote consultation aligned with your local time zone for frame anchoring, pivot alignment, and smart lock calibration.
• Clear Documentation: Every shipment includes comprehensive exploded-view drawings and step-by-step installation manuals.
• 10-Year Warranty: All door structures, powder-coated surface finishes, and core hardware components are backed by our 10-year factory quality warranty against defects.