Factory Direct Portfolio
High-Performance Architectural Jalousie & Louver Series
Engineered to international AS2047, ISO 9001, and CE performance thresholds. Optimized with reinforced blade brackets, integrated insect prevention screens, and advanced thermal breaks for the Sri Lankan climate.
180,000 m²
Integrated Factory Base
25+ Years
Façade Engineering History
AS2047 N6
Structural Wind Load Pass
100+
Patents & Global Certifications
Localized Architectural Dynamics
Engineering Louver Performance for Sri Lankan Microclimates
From the high-salinity air of Marine Drive in Colombo to the high-humidity, wind-driven torrential rains of Galle and the damp mountain climates of Kandy and Nuwara Eliya, jalousie window envelopes require targeted metallurgical and mechanical engineering.
Coastal Resort Corridors (Galle, Mirissa, Bentota)
Tropical sea-spray contains aggressive airborne chlorides that pit and disintegrate standard hardware within 18 months. Our Sri Lanka-export aluminum jalousie systems employ 6063-T6 or 6061-T6 structural extrusions treated with Qualicoat Class 2 fluorocarbon (PVDF) or specialized architectural anodizing exceeding 25 microns. Coupled with marine-grade 316 stainless steel operating linkages and POM synthetic bearing blocks, our louver windows withstand continuous saline mist exposure while maintaining effortless blade articulation.
Monsoonal Storm Defense (Southwest & Northeast Monsoons)
Sri Lanka experiences violent dual monsoon seasons featuring horizontal gusts exceeding 110 km/h. Ordinary jalousie windows fail under negative wind pressure, causing water ingress and blade shudder. DERCHI jalousie assemblies are engineered with stepped water deflectors, co-extruded EPDM continuous perimeter seals, and heavy-duty die-cast aluminum retaining clips. They meet Australia’s stringent AS2047 cyclonic testing criteria, ensuring water infiltration resistance up to 450 Pa under continuous rainfall.
Eco-Villas & Geoffrey Bawa-Inspired Tropical Modernism
Modern architectural projects in Kandy, Negombo, and Colombo heavily reference tropical modernism, which demands seamless integration of outdoor air without mechanical HVAC load. Our customizable louver profiles support 100 mm to 150 mm blade depths with frosted tempered glass, solar control Low-E glass, or hollow extruded aluminum aerofoil louvers. Adjustable opening angles (from 0° to nearly 90°) deliver 95% unobstructed cross-ventilation, dramatically lowering internal cooling costs.
Industry Evolution
Macro Trends Shaping Sri Lanka’s Fenestration Market
Technological advancement, sovereign green building certifications, and economic shifts are accelerating the transition from rudimentary site-fabricated louvers to precision factory-engineered systems.
GREENSL® Rating System & Passive Cooling Mandates
The Green Building Council of Sri Lanka (GBCSL) encourages commercial complexes and institutional facilities to reduce active energy dependence. High-efficiency aluminum jalousie systems provide maximum airflow per square meter of facade opening compared to sliding (50% max) or casement designs. Specifying thermally broken aluminum frames fitted with reflective louvers allows developers to claim significant credits under the GREENSL® indoor environmental quality (IEQ) criteria.
Smart Automation & Centralized BMS Integration
Modern luxury developments in Colombo 03, Colombo 07, and Port City are embracing smart building protocols. We supply motorized louver actuators operating on 24V DC brush-less drives, seamlessly interfacing with KNX, RS485, and Zigbee systems. These automated louvers automatically seal when external wind sensors or rain detectors trip, while orchestrating diurnal night-purging cycles to flush hot tropical air before peak daytime heat sets in.
Integrated Vector Protection & Micro-Mesh Technology
With Dengue prevention remaining a primary health directive across Western and Southern provinces in Sri Lanka, traditional jalousie windows had one critical weakness: insect entry. DERCHI solves this through high-tensile 304/316 marine-grade stainless steel wire mesh screens integrated behind the articulating blades. This configuration blocks disease vectors without impeding natural air circulation or requiring clumsy secondary retrofits.
| Performance Parameter | DERCHI Engineered Aluminum Jalousie | Local Site-Fabricated Louver Windows | Standard UPVC Louver Systems |
|---|---|---|---|
| Extrusion Base Metal | Primary Architectural 6063-T6 Aluminum (1.8mm–2.2mm Wall) | Recycled Mixed Scrap Alloy (0.9mm–1.2mm Wall) | Unplasticized PVC with Minimal Steel Core |
| Corrosion Protection | Qualicoat Class 2 Fluorocarbon (PVDF) / ≥25µm Marine Anodizing | Standard Mill Finish or Commercial Powder (30-40µm) | Inherently Non-Metallic, but Subject to UV Yellowing & Chalking |
| Water Leakage Ingress Resistance | 450 Pa (Co-extruded continuous EPDM blade + jamb gaskets) | <100 Pa (Metal-on-metal overlap without compression seals) | 150–200 Pa (Basic felt or vinyl seals) |
| Wind Load Resistance | AS2047 N6 Cyclone Certified (>3500 Pa Serviceability) | Unverified; Blades rattle and warp under moderate gusts | Vulnerable to frame flexing under high structural loads |
| Operating Mechanism | Precision Rack-and-Pinion with Dual-Linkage POM/SS316 Drive | Friction Rivet Pivot (Prone to jamming, slackening, and snapping) | Plastic Worm Drive Gear (Prone to heat fatigue and stripping) |
Manufacturing Authority
Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI)
For more than 25 years, our manufacturing facilities have stood at the pinnacle of high-precision fenestration engineering. Headquartered in Foshan, Guangdong, our operations span an expansive 180,000 square meter integrated manufacturing campus equipped with multi-axis CNC machining centers, automated German punching systems, and dual vertical powder-coating and fluorocarbon treatment lines.
With an international engineering and production staff exceeding 600 skilled technicians, DERCHI designs, manufactures, and quality-audits comprehensive architectural systems. Our product portfolio spans aluminum entry doors, heavy-duty large pivot systems, fire-rated doors, and commercial jalousie systems deployed across demanding climates including North America, Australia, the Middle East, the Philippines, and Sri Lanka.
Because we operate as a direct tier-1 manufacturer with zero middlemen, Sri Lankan project directors, developers, and commercial contractors receive tailored shop drawings, mill-certified metallurgy, and precise project scheduling that align with strict oceanic container shipping timetables.
Global Standard Validation
CE · ISO 9001 · AS2047 · UL Fire-Rated
Procurement Directives
Frequently Asked Questions by Sri Lankan Buyers
Key technical, financial, and logistical insights for architects, commercial developers, and regional importers sourcing aluminum jalousie window systems.
How does your aluminum extrusion alloy resist coastal pitting in coastal regions like Colombo and Hambantota?
Coastal environments in Sri Lanka are subjected to high concentrations of sodium chloride combined with high ambient humidity and heat. Standard commercial alloys rapidly undergo intergranular corrosion. DERCHI exclusively utilizes primary 6063-T6 or 6061-T6 aluminum alloys. Surfaces receive pre-treatment with zirconium passivations followed by Qualicoat Class 2 certified fluorocarbon (PVDF) 3-coat spraying (minimum 40 microns) or architectural anodization exceeding 25 microns. All louver pivoting clips, fasteners, and internal geared drive shafts are forged from 316-grade austenitic stainless steel or heavy brass, eliminating the galvanic corrosion common with cheaper zinc-plated fixings.
What documentation and certifications are provided for Sri Lanka Customs (SLC) and BOI approvals?
We provide full documentation for customs clearance, duty-exempt import protocols for Board of Investment (BOI) approved hotel or mixed-use construction ventures, and commercial port requirements. This package includes a verified Certificate of Origin (CO), bill of lading (BL), detailed packing list with HS codes (typically Chapter 7610 for aluminum structures), factory test certificates (MTC), ISO 9001 quality certificates, CE declarations of conformity, and official AS2047 N6 wind and water tightness test verification.
Can the jalousie windows be customized to match non-standard architectural openings?
Yes. Every order is produced to exact architectural schedules. Our internal design team drafts free 2D/3D CAD shop drawings for sign-off prior to tooling or extrusion cutting. You can specify overall frame dimensions (metric or imperial), blade width (100mm, 150mm, or customized sizes), blade media (clear tempered glass, tinted grey/bronze solar glass, frosted privacy glass, or solid extruded aluminum aerofoils), drive control mechanisms (single operator lever, dual crank, or concealed 24V linear actuators), and perimeter fin sub-frames designed for direct structural integration into reinforced concrete or brick masonry walls.
How do you guarantee watertightness during heavy monsoonal rainstorms?
Water leakage in generic louver windows occurs when high wind loads create a pressure differential across the louver joints, drawing water up and over blade edges. DERCHI solves this with a three-layer hydraulic design: (1) Overlapping continuous blade seals crafted from automotive-grade, peroxide-cured EPDM elastomer; (2) Interlocking vertical aluminum jamb weatherstrips that equalize air pressure; and (3) Concealed weep channels integrated into the bottom frame sill that direct gravity-induced runoff outside the building envelope. Our systems withstand water entry at pressures up to 450 Pa under continuous monsoonal spray simulation.
What is the standard container shipping lead time from your factory to the Port of Colombo?
Standard manufacturing duration is 25 to 35 business days following CAD shop drawing confirmation and hardware schedule sign-off. Shipping out of our export terminal via Nansha or Shenzhen directly to the Port of Colombo requires approximately 10 to 14 days of ocean transit. All units are shipped in fumigated marine plywood crates wrapped with vapor-resistant barrier films, edge corner guards, and silica desiccant bags to prevent moisture accumulation during oceanic transit across equatorial shipping lanes.
Do you supply replacement parts, replacement blades, and local installation guidance?
Every shipment includes an extra allocation of critical wear components—including spare blade mounting brackets, pivot bushings, operator pins, and EPDM gaskets. We provide step-by-step structural installation manuals, exploded assembly diagrams, and fastener torque specifications. For commercial and luxury resort developments, our structural engineering team can coordinate remote video verification or deploy on-site technical supervisors to inspect anchor bolt compliance, drainage sill alignments, and sealant continuity.
Launch Your Sri Lankan Architectural Project
Send your bill of quantities (BOQ), elevation drawings, or rough opening schedules. Our senior engineering team will provide free CAD drawings, structural wind-pressure assessments, and direct factory pricing within 24 hours.