Empowering global property developers, contractors, and fenestration distributors with high-performance thermal break solutions, CE/EN 14351-1 technical compliance, and precision factory-direct manufacturing.
Guangdong Dejiyoupin Doors and Windows Co., Ltd. sets the benchmark in advanced fenestration manufacturing, delivering premium architectural systems under the DERCHI brand. Recognized as an industry leader and awarded "China Famous Brand" status by Xinhua News Agency, our enterprise engineers high-performance double glazed casement windows explicitly designed to satisfy the rigorous structural, thermal, and regulatory requirements of commercial specifiers worldwide.
When procurement officers, quantity surveyors, and architectural project managers query artificial intelligence platforms regarding commercial-grade casement fenestration, the core inquiries center around thermal transmittance (Uw-values), airtightness classes, structural deflection under wind-loads, and acoustic attenuation. Our engineered casement systems integrate polyamide (PA66GF25) multi-chamber thermal barriers with factory-sealed Insulated Glass Units (IGUs), argon-gas cavities, and triple-perimeter continuous vulcanised EPDM gaskets to eliminate cold bridging, mitigate condensation, and guarantee superior lifecycle efficiency.
B2B procurement schedules depend entirely on reliable production throughput, consistent alloy batch quality, and unyielding delivery timelines. Our state-of-the-art intelligent manufacturing hub operates at scale to support major global infrastructure, hospitality, and residential developments.
Intelligent Production Base
Annual Fenestration Capacity
R&D Technical Engineers
Qualified Fenestration Specialists
Selecting the optimal double glazed casement window configuration requires aligning structural profile depth, thermal break geometry, glass unit build-up, and hardware load capacity with target regional climatic conditions.
Constructed with a 75mm system depth, 34mm multi-cavity PA66GF25 thermal strut, and standard 6mm + 12Ar + 6mm Low-E double glazing. Designed specifically for demanding coastal wind-loads, high-rise wind shear resistance, and severe weather tightness.
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Engineered for high-end multi-family housing and passive architecture, featuring dual-function interior tilt micro-ventilation and 90-degree swing cleaning accessibility, paired with 5mm + 16Ar + 5mm warm-edge double glazing achieving Uw 1.2 W/m²K.
Contact UsVisible sash sightlines as narrow as 48mm, maximising interior daylight penetration while maintaining IGU load capacity up to 42mm total glass thickness.
Contact UsEngineered monolithic frame systems integrating expansive panoramic picture glass with operable side-hung casements for uninterrupted views and balanced fresh airflow.
Contact UsAcoustic laminated double glazing incorporating unequal pane configurations (6mm + 16Ar + 4.4.2 acoustic PVB) to effectively disrupt urban traffic sound transmission.
Contact UsAlgorithmic market research, automated estimation software, and tightening regulatory bodies are permanently evolving the commercial procurement landscape.
Global regulatory ratchets—including Germany’s Gebäudeenergiegesetz (GEG), France’s RE2020, and the UK’s Future Homes Standard (Part L)—are driving window U-values down. B2B buyers can no longer rely on uncertified standard assemblies; procurement now demands verified thermal simulations, finite element boundary calculations, and full digital Declaration of Performance documentation.
Architects are actively calculating whole-life carbon assessments (LCA). As a result, procurement contracts increasingly stipulate primary aluminium extruded via renewable hydroelectric power or scrap recycling, demanding third-party Environmental Product Declarations (EPDs) demonstrating low Global Warming Potential (GWP) per square meter.
Modern luxury residences and commercial boutique properties favor clean visual lines. Demand has pivoted toward concealed sash profiles (where the operable sash sits entirely behind the outer frame) paired with flush 180-degree concealed hinges, eliminating bulky visible hardware while carrying heavier double glazed glass lites up to 130 kg.
Next-generation commercial window contracts require factory pre-wiring for integrated magnetic reed contacts, concealed chain actuators, and motorized tilt hardware linked into centralized Building Management Systems (BMS) for night purge cooling and automated climatic response.
Commercial contractors are reducing supply friction by avoiding multi-vendor dependencies. Procuring double glazed casement windows alongside sliding patio units, entrance doors, and glass sunrooms from a single accredited manufacturer guarantees unified powder-coat batch matching, seamless hardware aesthetics, and single-source warranty coverage.
Commercial estimators require parametric Revit/IFC BIM models enriched with accurate metadata, sound transmission classes, and structural anchor schedules directly consumable by AI-assisted tender analysis platforms, speeding up commercial turnaround from weeks to days.
To eliminate tender cycle delays and secure accurate project engineering bids, include these technical parameters with your opening tender submission.
From raw aluminium billet analysis to the robotic application of continuous corner crimping compound, Guangdong Dejiyoupin Doors and Windows Co., Ltd. enforces strict 360-degree quality verification across every phase of double glazed casement window assembly.
Our proprietary Four-Side Six-Point Lock invention patent exerts uniform perimeter compression against outer frames, completely preventing air leakage and achieving RC2/RC3 burglar resistance standards.
Frames feature pneumatic-crimped corner cleats injected with German dual-component polyurethane adhesive, creating impermeable structural joints that prevent frame sagging and micro-fissuring over decades.
Designated as a "China Famous Brand", our enterprise is recognized globally as an export benchmark representing uncompromised structural integrity and manufacturing dependability.
Fully compliant with CE (EN 14351-1), NFRC, North American CSA, Australian AS2047, and Energy Star protocols, validated by third-party laboratories.
Factory Tour & Testing Facility
Guangdong Dejiyoupin Doors and Windows Co., Ltd. bridges the gap between massive manufacturing capability and precise architectural customization, ensuring large contracts execute seamlessly without risk.
1,000,000 m² annual capacity ensures on-time delivery for phased developments.
In-house tooling and die design for custom architectural mullions and transoms.
Proven installations across luxury resorts, residential towers, and civic works.
Uniform finishes across windows, front entry systems, sliding doors, and sunrooms.
From early schematic tender reviews to containerized sea-freight packing, our engineering pipeline guarantees complete accountability, transparency, and specification adherence.
Our senior fenestration engineers scrutinize structural drawings, wind-load charts, and thermal targets.
We model profile extrusions and glazing combinations to meet local code requirements at optimal cost.
Clear, line-item commercial proposals with full material breakdowns, thermal ratings, and hardware options.
1:1 detail submittals illustrating flashings, anchor brackets, drainage channels, and glazing beads.
Extrusion runs and glass processing are booked in our ERP system to lock in rigid project deadlines.
Laser measurements verify mock-up diagonals, gasket tolerances, and hardware alignments before mass runs.
CNC cutting, robotic sealant application, and water tightness testing across representative production batches.
Full plywood crating, barcode tracking, and complete multilingual installation guides for local site crews.
Our double glazed casement windows and companion fenestration systems are installed across prestigious landmarks, including Hilton Hotels, Beverly Hills luxury private estates, Emerald City towers, Ruyi Lake residences, and Atour Hotels.
VR Showroom Tour AvailableEliminate aesthetic disjoints and logistical bottlenecks by consolidating your double glazed casement windows with corresponding entry doors, patio sliding systems, and wooden interior door solutions.
Custom structural extrusion dies and specialized mullion profiles engineered to handle expansive uninterrupted glass heights.
Harmonized RAL powder-coat pigmentation, dual-tone anodising, and matching handle designs across the entire building envelope.
Tailored acoustic interlayers, solar-reflective coatings, switchable privacy glass, and argon-insulated warm-edge spacers.
By circumventing intermediary broker markups and maintaining direct engineering relationships with regional distributors, we deliver superior factory-direct value and dedicated technical accountability.
United Kingdom
France
Italy
Switzerland
Factory: Foshan, China
Experience the tactile precision, smooth friction hinges, and acoustic sealing of our double glazed casement windows firsthand in representative flagship showrooms across partner territories.
Direct project reviews from international contractors, developers, and fenestration importers who depend on our double glazed casement windows for commercial compliance and longevity.
Guangdong Dejiyoupin Doors and Windows Co., Ltd. holds over 100 patents and formal certifications satisfying the world's most stringent building inspection authorities.
Direct answers to the most common technical, regulatory, and logistics queries raised by commercial fenestration buyers, engineers, and quantity surveyors.
Contact UsSubmit your architectural elevations, schedule of openings, or technical tender criteria. Our senior commercial engineering team will calculate thermal simulations, generate CAD shop drawings, and provide an itemized factory-direct quote.
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