Frequently Asked Questions

Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) is an authentic direct manufacturer with over 25 years of specialized expertise in architectural entry systems, high-performance aluminum doors, and precision building envelopes.

We own and operate a massive, state-of-the-art 180,000 m² manufacturing complex in Foshan, Guangdong Province—the center of China's aluminum industrial cluster—powered by over 600 skilled technicians. Unlike commercial trading agencies, our factory directly manages extrusion processing, surface treatment, precision CNC corner cutting, hardware integration, and multi-tier quality control inspections. International buyers work straight with our engineering and production departments, securing factory-level wholesale pricing, direct accountability, custom OEM/ODM support, and uncompromised supply chain stability.

We engineer heavy-duty, architecturally versatile door solutions designed for tropical, coastal, high-altitude, and seismic environments. Our core international export portfolio includes:

• Aluminum Entry & Pivot Doors: Thermally broken or non-thermal high-grade 6063-T5/T6 alloy entry doors and grand oversized pivot portals with German hardware.
• Cast Aluminum Security Doors: Structural armor doors featuring thick three-dimensional relief panels, superior forced-entry resistance, and classical or contemporary aesthetics.
• Stainless Steel Entry Portals: Marine-grade 304 and 316 stainless steel security doors engineered for maximum durability in high-salinity coastal areas.
• Architectural Glass Systems: Minimalist entrance doors with double-laminated or triple-insulated safety glass that maximize daylighting without sacrificing acoustic or structural performance.
• Full Villa Opening Packages: Motorized sectional garage doors and interior solid timber doors that can be consolidated into identical shipping containers to streamline import freight.

Because our commercial and luxury residential doors are engineered to project-specific dimensions and environmental wind pressures, pricing is fully itemized to reflect real job requirements without hidden markups.

To receive a swift and exact quotation within 24 hours, email our technical sales department at [email protected] with:

• Schedules & Dimensions: Elevation drawings, architectural door schedules, or exact rough opening dimensions (width, height, and wall depth).
• Material & Surface Finishes: Chosen metal system (extruded aluminum, cast aluminum, or stainless steel) and surface finish (AkzoNobel architectural powder coating, fluorocarbon PVDF, or specialized anodizing).
• Glazing & Thermal Requirements: Desired glass configuration (double tempered, triple laminated, solar reflective, or argon-gas filled low-E units).
• Hardware & Security Specs: Multi-point manual locks, concealed German pivot hinges, or biometric smart keyless entry systems.
• Logistics Terms: Preferred Incoterms (FOB Foshan/Guangzhou/Shenzhen, CIF, or CFR to your target discharge seaport).

For standard systems and catalogue architectural dimensions, standard manufacturing lead time is 25 to 35 calendar days following deposit confirmation and formal sign-off on shop drawings.

For non-standard, custom-engineered oversized pivot doors, specialized cast patterns, or custom RAL fluorocarbon finishes, fabrication generally requires 35 to 45 calendar days. For large multi-unit residential projects or commercial developments, our manufacturing planner can schedule staggered production batches, synchronizing container dispatches directly with your on-site building schedule.

Every overseas consignment from Guangdong Dejiyoupin Doors and Windows Co., Ltd. is backed by our comprehensive 10-year factory warranty against structural and manufacturing defects.

This includes 10-year structural integrity coverage on frame corners, profiles, and structural welding; high-durability surface coatings (PVDF fluorocarbon and outdoor architectural powder coats) against abnormal peeling, chalking, or delamination under specified outdoor exposures; and 3 to 5-year replacement warranties on precision mechanical locking systems, pivot bearing assemblies, and automated operators.

We ensure that local installation teams have all the information required to align and commission every door system correctly:

• Shop Drawings & Numbered Labels: Every door sash, frame, threshold, and hardware carton is explicitly labeled and matched with opening-by-opening CAD layout drawings.
• Visual Guides: 3D assembly guides and HD step-by-step installation videos illustrate pivot axis adjustment, leveling, perimeter sealing, and lock calibration.
• Remote Technical Sessions: Senior technical engineers schedule remote video support calls to assist your site engineers in real time.
• Spare Parts & Critical Hardware: Replacement gaskets, extra fasteners, and essential spare components are packaged with every container shipment.

Yes. Engineering compliance is a core foundation of our export operations. Our doors are developed, fabricated, and tested to meet or exceed internationally acknowledged performance criteria:

• ISO 9001: Certified quality management covering the entire factory floor.
• CE Compliance: Rigorous safety, wind resistance, and structural testing according to European directives.
• AS 2047: Australian performance testing covering wind pressure, water penetration, and air infiltration up to extreme cyclic ratings.
• Fire Performance & Security: UL and EN fire-rated configurations alongside forced-entry test verifications.

We supply formal third-party test reports and engineering documentation to help developers secure rapid local municipal building permit approvals.

Ocean freight conditions involve humidity shifts, motion shocks, and extended transit times. We apply a multi-tier protective packaging protocol for every export order:

• Surface Protection: Scratch-resistant adhesive film protects all exposed anodized, powder-coated, or timber-grained metal surfaces.
• Shock Absorption: Thick pearl-cotton (EPE) wrapping cushions all edges, frames, and glazed units.
• Corner Defenses: Reinforced impact-absorbing structural corner caps guard against shifting inside containers.
• Plywood Enclosures: Fully sealed, heavy-duty fumigation-free engineered plywood crates built on pallet bases for stable forklift handling.

Yes. Overseas partners are welcome to explore our facilities in several ways. You can take an interactive 360-degree virtual reality tour of our profile, glass, assembly, and testing lines through our website, or schedule an in-person factory visit in Foshan, China.

Alternatively, our sales engineering team can host a scheduled live video audit, taking you directly onto the workshop floor to review your ongoing door order, run operational checks on finished pivot units, and inspect packaging before container loading.

Yes. We support flexible shipping arrangements based on your import capabilities. Our logistics partners maintain established maritime shipping routes to major international ports across South America, North America, Oceania, Europe, and the Middle East.

We routinely arrange FOB China, CIF, and CFR shipping to primary seaports including Santos, Callao, San Antonio, Buenaventura, Guayaquil, and Buenos Aires. All bill of lading paperwork, certified commercial invoices, and origin documentation are prepared accurately to facilitate clear customs clearance.