Precision Engineering Portfolio
High-Performance Aluminium Windows & Architectural Systems
Built directly in our 180,000 m² smart production base. Featuring integrated CNC-machined security jali grilles, thermal-break extrusion systems, multi-point locksets, and NFRC/AS 2047 certified glazing assemblies.
180,000m²
Integrated Factory Base
600+
Skilled Technical Staff
100+
Global Patents & Certs
25+
Years Export Engineering
Structural Metallurgy & Security Integration
Engineering Custom Aluminium Jali Windows for Sub-Saharan Challenges
In South African architectural typologies, a "Jali Window" is far more than a decorative perforated screen; it is an integrated architectural barrier that marries solar heat gain mitigation, continuous passive ventilation, and physical intrusion deterrence.
Architectural 6063-T6 Extrusion
We forge our master structural profiles using primary billet 6063-T6 aluminium alloy, achieving a tensile strength superior to standard commercial profiles (≥205 MPa). This metallurgic density guarantees extreme rigidity across broad spans, eliminating frame deflection when subjected to Cape coastal gales or Highveld thunderstorm gusts exceeding 1.5 kPa wind pressures.
Yield: ≥160 MPa
Hardness: ≥12 Webster
Al-Mg-Si Alloy
Monolithic CNC & Cast Jali Screen
Unlike third-party welded mild-steel burglar bars that corrode and damage plaster reveals, our integrated jali panels are precision laser-cut from high-tensile 4.0mm–8.0mm structural aluminium sheets or formed via monolithic aluminium die-casting. The screen is deeply recessed directly within the primary jamb and sash profiles, creating a tamper-resistant structural unit.
Anti-Pry Frame Channel
Laser CNC Accuracy: ±0.1mm
Zero Exposed Fasteners
Polyzone Thermal Barrier Engineering
South Africa's extreme solar irradiance requires stringent compliance with SANS 10400-XA thermal regulations. Our custom windows incorporate multi-chambered polyamide PA66 GF25 thermal breaks. This stops thermal bridging between the scorching exterior jali frame and air-conditioned interior living zones, dramatically reducing overall cooling loads.
Polyamide 66 + 25% GF
Low U-Value Profile
Acoustic Decoupling
| Performance Characteristic | OEM Custom Factory Specification (DERCHI / Dejiyoupin) | Conventional South African Market Stock (Standard Class) | SANS / SABS Reference Benchmark |
|---|---|---|---|
| Aluminium Alloy & Temper | Primary Virgin 6063-T6 Extrusion, Wall Thickness 1.6mm - 2.2mm | Recycled Scraps Alloy 6063-T5, Wall Thickness 1.0mm - 1.2mm | SANS 999 / EN 755-2 Structural Integrity |
| Jali Security Assembly | CNC Integrated Hidden-Channel Mortise; Concealed Tamper-Proof Fasteners | Surface-Riveted or Face-Welded Expanded Mesh / Grille Bars | SANS 10400 Part T & Part N Intrusion Defense |
| Surface Treatment (Corrosion) | Qualicoat Class 2 Architectural Powder Coat (80–120μm) / 25μm Anodized | Commercial Anodizing (10–15μm) or Standard Industrial Wet Paint | ISO 9227 C5-M Marine Coastal Salt Spray (3000+ Hrs) |
| Thermal & Fenestration Metrics | Thermal Break System: U-Factor 1.4 - 2.1 W/m²·K; SHGC Down to 0.28 | Non-Thermal Profiles: U-Factor 5.4 - 5.8 W/m²·K; Uninsulated Glazing | SANS 10400-XA Energy Efficiency Fenestration Mandate |
| Hardware & Locking Mechanism | German Siegenia / Custom 316 Stainless Multi-Point Deadbolt Systems | Single-Point Zinc Die-Cast Handles & Plastic Friction Stays | PAS 24 / AS 2047 Forced Entry & Cyclone Wind Pressures |
Regional Deployment Architecture
South African Climatic & Security Micro-Environments
From the harsh marine salinity of the Atlantic Seaboard to the thunderstorm-driven wind loads of Gauteng, fenestration products must be custom-formulated for local bioclimatic and security parameters.
Coastal C5-M Marine Zones (Western Cape & KZN)
Properties in Camps Bay, Umhlanga, Ballito, and Knysna endure airborne chloride ion deposition and wind-driven rain. Uncertified aluminium corrodes via galvanic pitting within 18 months. Our OEM Jali systems undergo a multi-stage zirconium pre-treatment followed by Qualicoat Class 2 fluorocarbon (PVDF) or 25-micron deep-tank marine architectural anodizing. All moving hinges, jali attachment brackets, and lock spindles are forged from marine-grade Grade 316 stainless steel to eliminate coastal rust seizing completely.
Grade 316 Fasteners
PVDF Coastal Coating
Salt Pitting Resistance
Gauteng Gated Estates & Commercial Highveld (Johannesburg & Pretoria)
Architectural guidelines in gated communities like Waterfall Estate, Steyn City, and Silver Lakes demand sleek, contemporary aesthetics without industrial looking burglar bars. Our laser-machined geometric jali screens integrate directly flush with slim casement or folding window frames, fulfilling high estate aesthetic compliance while resisting severe mechanical prying attacks. The system allows residents to leave glazing open for cross-ventilation during warm summer nights without compromising family security.
Estate HOA Approved
Architectural Discretion
Ventilation Security
Hospitality Lodges & Eco-Estates (Limpopo & Mpumalanga)
Luxury game lodges face twin threats: unauthorized human access and destructive fauna (baboons, monkeys, snakes) coupled with high solar gain. Our custom Jali windows utilize micro-perforated structural panels coupled with integrated stainless steel insect meshes. They block wildlife entry and filter relentless UV rays while maximizing the visual connection to the African wilderness.
Wildlife Barrier
Solar Shading: 45%
Bug-Proof Mesh Combo
Market Evolution
Emerging Fenestration Trends in the South African Building Industry
The South African built-environment is undergoing a structural paradigm shift driven by stringent energy tariffs, load-shedding resilient passive design, and modernization of secure estates.
Passive Thermal Comfort & Off-Grid Independence
Due to grid unpredictability, architectural briefs now mandate passive envelope cooling. Jali panels perform as fixed micro-louvers, shielding glazing from radiant solar incidence (decreasing interior temperatures by 4°C to 7°C) and drastically cutting reliance on electric HVAC systems.
Direct-from-Source OEM Supply Consolidation
South African developers and QS firms are bypassing multi-tiered local distributors who mark up finished joinery by 40-60%. Direct OEM manufacturing partnerships provide full customization, verified international certifications, free shop drawings, and bulk crated container logistics delivered straight to Durban or Cape Town ports.
Minimalist Frame Profiles with Integrated Defense
Bulky visible burglar bars are obsolete in high-end developments. The trend dictates razor-thin sightlines where the safety jali appears as an organic geometric pattern or perforated privacy screen, completely embedded inside the architectural joinery profile.
Strict SANS 10400-XA & Glass Thickness Compliance
Municipal building inspectors across Cape Town and Sandton reject non-compliant single-glazed fenestration. SANS 10400-XA mandates certified fenestration calculations (solar heat gain coefficients and U-values), accelerating the adoption of pre-certified OEM thermal-break systems with factory-fitted Low-E double glazing.
Procurement Intelligence
South Africa Sourcing, Compliance & Engineering FAQ
Real-world technical answers for property developers, quantity surveyors, architects, and specialized installation contractors sourcing custom aluminium jali windows directly from the OEM manufacturer.
How do custom OEM Aluminium Jali Windows comply with South African National Standards (SANS 10400-XA and SANS 10137)?
Our aluminium jali window assemblies are engineered to fulfill or exceed SANS 10400-XA (Energy Usage in Buildings) and SANS 10137 (Installation of Glazing in Buildings). By integrating multi-cavity polyamide PA66 thermal breaks and high-performance double-glazed Low-E units (4mm+12A+4mm up to 6mm+16A+6mm laminated safety glass), our assemblies achieve overall fenestration U-values as low as 1.6 W/m²·K and SHGC ratings tuned specifically for South African climatic zones 1 through 6. All structural calculations, glass thickness compliance tables, and thermal simulation data are supplied upfront for prompt submission to your professional architectural technologist or municipal building plan inspector.
Can your factory manufacture custom jali patterns according to our architectural CAD drawings?
Yes. As a true bespoke OEM manufacturer, we specialize in high-precision bespoke production. You can supply architectural drawings in .DWG, .DXF, or Revit .RVT formats. Our senior structural engineers translate your vision into calibrated laser-cutting paths or bespoke aluminium casting molds. Whether your scheme calls for contemporary parametric slats, traditional Moroccan arabesque patterns, or African geometric motif jali grilles, our multi-axis CNC machines cut the design from solid structural-grade alloy sheets with a tolerance margin of ±0.1mm.
How does the sea-air corrosion protection compare to locally anodized products in Durban or Cape Town?
Standard residential windows sold off-the-shelf in South Africa frequently carry commercial powder coatings with a modest thickness of 40–50 microns, which degrade and blister quickly under the salt-mist conditions of the Atlantic Seaboard or the high-humidity subtropical coast of Durban. In contrast, our coastal-grade exterior window profiles receive an automated 12-stage chemical pretreatment (chrome-free immersion bath) followed by Qualicoat Seaside Class 2 architectural polyester powder coating (80–120 microns) or a 25-micron deep-tank anodized finish. Both treatments are laboratory-tested to withstand more than 3,000 hours of continuous neutral salt spray (ASTM B117 / ISO 9227) without filiform or pitting corrosion.
What are the sea-freight transit times, packaging methods, and clearing logistics for Durban or Cape Town?
Direct ocean container shipping from our Foshan export terminal typically takes 22 to 28 days to the Port of Durban, and 26 to 32 days to Cape Town. Because custom jali window systems incorporate delicate laser-cut features and precision-glazed panels, every unit is individually bubble-wrapped, edge-protected with corner guards, and sealed inside fumigated, ISPM 15-compliant solid plywood crates reinforced with internal steel strapping. We furnish all necessary trade documentation for SARS customs clearance: bill of lading (B/L), commercial invoice, detailed packing list, and country of origin certificates. We also work seamlessly with your preferred clearing agent or freight forwarder.
Can jali windows replace ugly steel burglar bars in secure lifestyle estates without violating HOA rules?
That is one of the principal design drivers behind our high-end jali window demand across South Africa. Most Homeowners Associations (HOAs) in premium estates specifically prohibit external, visibly retrofitted steel security gates, expandable trellises, or welded square-tube bars because they detract from uniform estate property values. Our OEM Aluminium Jali Windows solve this dilemma completely: the structural security jali is designed as an integral, aesthetically flush architectural component of the window sash itself. To estate architectural committees, it reads as a sophisticated architectural solar screen or decorative louvre, yet provides robust resistance against physical intrusion.
How do you guarantee dimensional accuracy for rough openings measured by local South African contractors?
Before metal profile cutting commences, our engineering department produces detailed 1:1 CAD shop drawings based on your measured brick-to-brick rough openings or structural openings. We clearly show overall outer frame dimensions, deduction tolerances (standard 10mm all round for silicone sealing and fixing shims), anchoring positions, sill pan flashing channels, and sub-frame integration. Production begins only after you, your structural engineer, or your contractor thoroughly reviews, confirms, and formally signs off on the engineered shop submittals.
The Manufacturer
Guangdong Dejiyoupin Doors & Windows Co., Ltd. (DERCHI)
As a distinguished top-tier door and window manufacturing enterprise, our industrial compound spans over 180,000 square meters in Foshan, Guangdong. Backed by a high-calibre team of more than 600 production and engineering specialists, we have dedicated over 25 continuous years to the research, precision manufacturing, and international export of luxury fenestration systems.
Our export division has engineered and supplied luxury villas, commercial developments, and multi-unit residential projects worldwide, with prestigious project references across the United States, Canada, Australia, the Philippines, and the Middle East. With over 100 registered patents and international certifications, we provide South African developers with direct factory accountability, eliminating intermediary markups and ensuring uncompromised architectural quality.
Independently Verified International Standards
Certified compliance: CE · ISO 9001 · AS 2047 (Cyclonic N6 Wind Rating) · NFRC Energy Certification · UL Fire-Rated
