Frequently Asked Questions

Guangdong Dejiyoupin Doors and Windows Co., Ltd. is a verified, direct manufacturer operating an intelligent 180,000 m² state-of-the-art production base in Foshan, Guangdong Province, China — the recognized global center for precision aluminum extrusion and structural fenestration.

Backed by over 25 years of specialized engineering experience and a workforce exceeding 600 skilled technicians, DERCHI is ranked among China's premier architectural window and door manufacturers. We control every stage under ISO 9001-certified processes: from aluminum extrusion optimization and thermal strip crimping to multi-point CNC machining, insulated glass unit (IGU) assembly, and 360-degree quality inspections prior to crating.

We manufacture custom, made-to-measure fenestration systems tailored to strict residential, commercial, and mixed-use architectural criteria:

• Thermal-Break Aluminum Sliding & Lift-and-Slide Doors: Heavy-duty rollers capable of handling single sashes up to 400 kg with flush thresholds.
• Slimline Aluminum Bifold Systems: Space-saving configurations with top-hung stainless steel carriers and multi-point sealing.
• Architectural Casement & Tilt-Turn Windows: Outward and inward opening systems featuring European multi-point security hardware.
• Oversized Panoramic Picture Windows: Structural silicone-glazed spans optimized for maximum daylight and solar control.
• Insulated Sunrooms & Solariums: Reinforced aluminum structural frames with integrated thermal roofing and motorized louvers.
• Engineered Interior Wooden Doors: Whole-house matching packages combining warm timber millwork with our modern aluminum envelope.

DERCHI holds more than 100 independently registered national and international invention patents. Our systems are verified by accredited third-party laboratories to satisfy stringent global fenestration benchmarks:

• United States / International: NFRC (National Fenestration Rating Council) energy certification, AAMA performance compliance, and ASTM hurricane impact testing.
• Australia / New Zealand: AS2047 (Windows and External Glazed Doors in Buildings) and AS1288 architectural glass safety ratings.
• European Union: CE Marking compliance in accordance with EN 14351-1.
• Canada: CSA (Canadian Standards Association) compliance.
• Quality Systems: ISO 9001, ISO 14001, and Energy Star recognition.

Desert environments in the UAE, Saudi Arabia, Qatar, and Kuwait experience exterior surface temperatures exceeding 60°C. Standard aluminum frames readily transfer this heat indoors, overburdening HVAC infrastructure. Guangdong Dejiyoupin Doors and Windows Co., Ltd. resolves this by incorporating:

• Multi-chamber polyamide PA66 GF25 thermal insulating strips that mechanically isolate exterior aluminum from interior structural profiles.
• High-performance Low-E insulated glass units (IGUs) filled with 90%+ argon gas and warm-edge composite spacers, achieving overall U-factors as low as 1.2 to 1.6 W/(m²·K).
• Solar heat gain coefficients (SHGC) customized below 0.22 to effectively reflect intense radiant solar energy while preserving crystal-clear visible light transmission.

Airborne desert sand particles cause seal abrasion and track clogging on conventional sliding fixtures. Our GCC-engineered configurations incorporate vulcanized multi-barrier EPDM gasket systems, high-density silicone-treated weatherstripping fins, and patented concealed weep holes with one-way wind baffles.

For sliding configurations, we utilize heavy-duty stainless steel tracks with self-cleaning brush seals ahead of the rollers, preventing sand buildup and preserving effortless silent glide operation for decades.

To resist hyper-saline humidity and high UV degradation across Arabian Gulf and Red Sea coastal cities, our profiles receive architectural-grade coatings adhering to AAMA 2604 / AAMA 2605 and Qualicoat Class 2 specifications.

Options include AkzoNobel fluoropolymer (PVDF) electrostatic coatings and super-durable thermoset powder coatings tested against 3,000+ hours of continuous salt-spray exposure without blistering, chalking, or color fading.

To receive an itemized factory price quotation and preliminary CAD structural analysis, commercial buyers and estimators should provide:

• Architectural floor plans, elevation schedules, or tender drawings (.DWG or .PDF format).
• Required profile series and surface finish requirements (e.g., matte black powder coat, metallic bronze PVDF, or wood-grain transfer).
• Glass composition requirements (e.g., 6mm Low-E + 12A + 6mm clear tempered double glazed, or acoustic laminated).
• Hardware brand preference (Sobinco, Hoppe, Siegenia, or DERCHI patented multi-point lock systems).
• Design wind pressure or project structural loading requirements.

Standard fabrication lead time is 25 to 35 calendar days following receipt of the production deposit and signed shop drawing approvals. Tailored, expedited production slots can be arranged for large-scale multi-unit commercial developments.

For ocean freight, products are wrapped in protective multi-layer film, corner-guarded with high-density foam, and packed into ISPM 15 heat-treated non-fumigation plywood crates with internal steel strapping to eliminate transit shifting.

Guangdong Dejiyoupin Doors and Windows Co., Ltd. provides end-to-end engineering support. Every delivered consignment includes comprehensive structural anchor diagrams, fastener schedules, and sequenced assembly instructions.

For major hospitality and community developments, we offer remote video engineering support and can dispatch bilingual technical supervisors to overseas project sites for installer training and quality inspection sign-off.