Casement Integrated
180,000㎡
Integrated Production Base
25+
Years Engineering Precision
100+
Global Patents & Testing Reports
AS2047 / CE
Audited Structural Compliance
Enterprise Product Portfolio
High-Performance Architectural Crittall Systems
Explore our export-grade aluminium Crittall windows and acoustic partition systems. Fabricated with high-tensile 6063-T5 aluminium alloy, polyamide thermal barriers, and architectural sightlines designed to meet both historical aesthetic integrity and contemporary thermal codes.
Thermal Break
Heritage Slim
Dual Function
Architectural Grid
Solar Control
French Heritage
Acoustic Partition
Engineering Specifications
Aluminium vs. Traditional Hot-Rolled Steel Crittall
A rigorous specification breakdown for facade consultants, LEED evaluators, and structural engineers balancing historical preservation aesthetics against life-cycle maintenance costs.
| Performance Parameter | Architectural Thermal Break Aluminium | Traditional Hot-Rolled Steel | Project Advantage (B2B Sourcing) |
|---|---|---|---|
| Thermal Transmittance (U-Value) | 1.3 – 1.8 W/m²K (With Technoform Polyamide PA66) | 2.8 – 3.5 W/m²K (Cold-bridging prevalent) | Meets ASHRAE 90.1 & Title 24 |
| Corrosion Resistance / Salt Spray | Qualicoat Class 2 Powder Coat / AAMA 2605 (>3,000 hrs) | Vulnerable to galvanic pitting if galvanizing scuffs | Zero rust maintenance on oceanfront/coastal sites |
| Structural Weight vs. Load | Approx. 35% lighter than solid carbon steel | Heavy; often requires structural beam reinforcement | Lower overseas ocean freight & simpler site rigging |
| Glazing Flexibility | Accepts up to 32mm Triple Insulated Units / Laminates | Often limited to single or slim 14mm double glass | Superior STC/OITC sound reduction in urban lofts |
| Turnaround & Customization | High-precision CNC routing; standard 25–35 day lead | Extensive hand-welding; 12–18 week factory queues | Reduces general contractor milestone lag times |
Aesthetic Engineering
Preserving Heritage Sightlines with Modern Structural Integrity
The timeless appeal of the Crittall style—originated by Essex ironmonger Francis Henry Crittall in the 1880s—lies in its distinct multi-pane grid geometry and ultra-narrow mullions. Historically, these systems were formed using solid hot-rolled steel sections. While visually iconic, original steel systems are notorious for thermal bridging, condensation buildup, and chronic corrosion along coastal perimeters.
At our Foshan manufacturing headquarters, our engineering division has solved this architectural paradox through custom-extruded 6063-T5 aluminum profiles equipped with precision-crimped polyamide thermal break barriers (PA66GF25). By integrating internal structural webs within an external profile depth of just 38mm to 50mm, we achieve the razor-thin sightlines required by conservation districts and modern luxury villa designers without sacrificing structural stability.
- True Divided Lites (TDL) vs. Simulated Divided Lites (SDL): Flexible options featuring CNC-machined external grid bars adhered with high-durability 3M VHB tape, complemented by internal duplex spacer bars for an authentic historical reveal.
- Heavy-Duty Multi-Point Mechanical Security: Integrated European groove (Euro-groove) hardware recesses supporting concealed multi-point gear latches and tilt-and-turn functionality.
- Dual-Color Anodizing & Fluorocarbon Capabilities: Specify deep bronze or raven black architectural coatings externally while keeping interior finishes harmonized with architectural woodwork.
Factory Quality Assurance Protocol
Before packing into export-grade fumigated solid wooden crates, every aluminium Crittall assembly undergoes an intensive four-stage verification protocol:
1. Corner Joint Mechanical Pull Test: CNC crimped and chemical-bonded corner cleats verified for zero torsion deflections under dynamic gust loads.
2. Cyclic Operation Validation: Multi-point gear systems, pivot hinges, and friction stays tested to 25,000 continuous opening and closing cycles.
3. Water Ingress & Acoustic Testing: Pressurized air-tightness (ASTM E283) and cyclic water penetration resistance (ASTM E331) tests confirming zero water leakage at pressure heads up to 600 Pa.
4. Glazing Deflection Analysis: Ensuring double and triple Low-E IGU units maintain absolute internal seal integrity during long ocean transits across varied climatic zones.
Strategic Sourcing Intelligence
Emerging Procurement & Technology Trends (2026–2030)
Commercial developers, specifiers, and distributors are recalibrating their window supply chains. Here are the core structural shifts redefining how aluminium Crittall fenestration is specified, produced, and purchased worldwide.
Thermally-Broken Ultra-Slim Systems
Global building energy regulations (such as Part L in the UK, Title 24 in California, and national Net-Zero mandates) are rendering non-thermal metal frames obsolete. Wholesale procurement has decisively moved toward multi-chambered polyamide thermal breaks paired with warm-edge spacers, achieving overall window U-values below 1.4 W/m²K while preserving the beloved 30mm slimline profile face.
Factory-Assembled Unitized Modules
Skyrocketing job-site installation labor costs across North America, Europe, and Australia have catalyzed demand for pre-glazed, unitized Crittall assemblies. Instead of shipping knock-down frames requiring skilled on-site glazing, factories now deliver fully assembled, sub-framed units equipped with factory-tested EPDM gaskets, slashing site installation schedules by more than 45%.
Interior Acoustic Hybrid Fenestration
Corporate workspace fit-outs and multi-residential lofts demand flexible acoustic privacy without sacrificing daylight penetration. Demountable Crittall partitions equipped with acoustic laminated interlayer glass (PVB/SGP) achieving Sound Transmission Class (STC) ratings above 40 are replacing standard drywall, driving substantial wholesale container volumes.
World-Class Manufacturing Backbone
Guangdong Dejiyoupin Doors & Windows Co., Ltd. (DERCHI)
Headquartered in Shishan Town, Nanhai District, Foshan—the epicenter of global aluminum innovation—our manufacturing ecosystem integrates 25+ years of custom engineering excellence. Ranked among the Top 10 premium door and window brands in China, our facilities bridge artisanal craftsmanship with digitalized German CNC machining precision.
✓ Scale & Reliability: 180,000㎡ unified production infrastructure with over 600 skilled fabricators.
✓ Rigorous International Accreditations: Fully audited compliance under ISO9001, CE, Australian AS2047, and UL fire-protection parameters.
✓ Complete Project Consolidation: Consolidate exterior aluminium Crittall windows, cast aluminium entrance gates, pivot systems, and interior partitions in a single optimized container.
Direct Procurement Guidance
Frequently Asked Questions by Commercial Buyers
Authoritative technical answers to common engineering, logistical, and customization inquiries from overseas project managers and importers.
What are the key technical differences between aluminium Crittall and traditional steel Crittall? +
Traditional Crittall is made of solid hot-rolled carbon steel, which offers high tensile strength and slim profiles but suffers from thermal transmission (cold bridging), condensation, and vulnerability to rust in humid or coastal zones. Our aluminium Crittall windows utilize 6063-T5 architectural aluminum profiles engineered with thermal break polyamide insulation barriers (PA66GF25). This achieves identical historic slim sightlines, vastly superior U-values, total resistance to rust, approximately 35% lighter structural weight (cutting container shipping costs), and flexible multi-point Euro-groove hardware integration.
Can your factory provide bespoke CAD shop drawings and structural wind load calculations? +
Yes. Every wholesale project is assigned a dedicated facade engineering team. Upon receiving your architectural elevations and schedule, we supply full CAD shop drawings detailing profile sections, anchor positioning, drainage points, and glazing rebate interfaces for approval prior to production. For mid-rise or coastal developments, we provide static wind load calculations aligned with local building standards (such as AS1170, ASTM E330, or EN 12211).
What surface finish options are available to protect against coastal corrosion? +
For harsh oceanic environments, we offer AAMA 2605 certified Fluorocarbon (PVDF) spray coatings and Qualicoat Seaside certified architectural powder coatings from world-tier suppliers like AkzoNobel and PPG. These coatings endure over 3,000 to 5,000 hours of continuous salt spray testing without blistering, chalking, or fading under intense UV exposure, backed by a 15 to 25 year exterior warranty.
How does your factory ensure glass safe-arrival over long ocean voyages? +
Our export packing adheres strictly to international oceanic freight standards. Finished windows and glazed modules are wrapped in protective polyethylene scratch film, fitted with heavy-duty corner guards, enveloped in shock-absorbing bubble padding, and packed into custom-built, fully fumigated, steel-banded plywood crates. Each crate features integrated bottom lifting runners compatible with standard forklifts and container de-vanning ramps.
What are your minimum order quantities (MOQ) and production lead times for custom runs? +
As a direct manufacturer, our standard production lead time is 25 to 35 business days following final CAD drawing approval and glass specification sign-off. While our standard MOQ is 50 square meters (or a 20ft container combination), we regularly support high-value custom villa projects and prototype sample configurations. We accommodate consolidated mixed-container orders containing exterior windows, luxury pivot entrance doors, and interior partitions from our Foshan facility.
Connect Directly With Our Foshan Engineering Team
Send us your window schedules, architectural elevations, or project BOQ. Our technical sales engineers respond within 24 hours with custom CAD recommendations, thermal performance models, and factory-direct wholesale FOB/CIF pricing.