Which Asian markets does DERCHI supply?

We supply developers, contractors and distributors across East, Southeast and West Asia, including Japan, South Korea, Singapore, Malaysia, Thailand, Indonesia, the Philippines, Saudi Arabia and Israel, as well as Oceania, Europe and the Americas.

Are your aluminum windows and doors suitable for typhoon-prone areas?

Yes. For typhoon and coastal zones we recommend reinforced profiles, laminated or tempered-laminated glass, multi-point locking and corrosion-resistant hardware. Our product range holds hurricane certification, and our engineers provide test data for each project submission. Final ratings depend on opening size, glass and configuration.

Which glass is best for hot and humid tropical climates?

For Singapore, Malaysia, Thailand and Indonesia, insulated glass units with Low-E or solar-control coatings help reduce cooling loads, while thermal-break aluminum profiles limit condensation on frames in air-conditioned interiors.

Can you manufacture from our architectural drawings?

Yes. Our 8-step engineering process starts with your drawings, followed by R&D, technical costing, detail confirmation, order deposit, on-site measurement, production confirmation and on-site installation guidance.

How can distributors in Asia become DERCHI partners?

DERCHI already works with 300+ overseas franchisees. Distributors and installers can review the Be A Partner program and email info@dejiwindowasia.com with their market and business profile.

EN 14351-1 Compliant Architecture

CE Certified Aluminium Double Doors Supplier & Exporter for Sri Lanka

Engineered to withstand South Asian tropical monsoons, coastal chloride aerosol corrosion, and high thermal transmittance. Manufactured with 6063-T6 aerospace alloys in our 180,000 m² Foshan complex for Colombo towers, Southern coastal villas, and hill country resorts.

Export Product Portfolios

Engineered Double Door Systems for Sri Lankan Architectural Projects

Explore our factory-engineered door systems tailored for the demanding Indian Ocean maritime environment, featuring multi-point locking mechanisms, thermally broken profiles, and tested cyclonic wind-load resistance.

Impact Rated Automatic Hurricane Proof Security Roller Shutter Door

Automatic Hurricane Proof Security Roller Shutter Door Anti-Theft Roll up Storm Shutter

Wind Load Class 5 Hardened Alloy

Technical Specs

Bi-Fold System Storm Proof Aluminum Folding Door Impact Glass Bi Fold Door

Storm Proof Aluminum Folding Door Impact Glass Bi Fold Door for Hurricane Zone Villa

EPDM Triple Seal Double Glazed

Technical Specs

Frameless View Frameless Bi Fold Glass Door Stack Glass Partition Foldable Accordion Door

Frameless Bi Fold Glass Door Stack Glass Accordion Door Restaurant Hotel Partition

12mm SGCC Glass Concealed Track

Technical Specs

Armored Main Door Luxury Single Design Metal Security Storm Doors

Luxury Metal Security Storm Doors Minimalist Waterproof Exterior Entrance Main Door

6-Point Locking Anti-Corrosion Anodized

Technical Specs

Minimalist Line Modern Interior Frameless Aluminum Invisible Door

Modern Invisible Door Design High Quality Aluminum Frame Composite Hidden Door

Zero Clearance Magnetic Latches

Technical Specs

Thermal Break Custom Soundproof Thermal Break Aluminum Exterior Security Door

Soundproof Thermal Break Aluminum Front Door Exterior Security Door Custom Double

PA66GF25 Barrier STC 42dB Rating

Technical Specs

Hospitality Ready Hotel Room Glass Interior Casement Door With Lock

Hotel Glass Casement Swing Door With Lock Kitchen Villa Bedroom Glass Door

304 Stainless Hinges Acoustic Core

Technical Specs

French Patio Customized Casement Glass Aluminum Door Villa Exterior Patio Swing Doors French Door

Customized Casement Glass Aluminum Door Villa Exterior Patio Swing French Doors

Sub-Sill Drainage Qualicoat Class 2

Technical Specs

Engineering Whitepaper

Technical Engineering Standards for Sri Lankan Fenestration Projects

Sri Lanka presents a rigorous microclimate matrix: coastal salt spray deposition from the Laccadive Sea, persistent high humidity (RH 75%–90%), monsoon rainfall bursts exceeding 250mm/day, and solar radiation loads reaching 1.2 kW/m².

Specifying aluminium double doors for high-end residential communities, mixed-use skyscrapers in Colombo Port City, and luxury boutique resorts along the Southern Coast requires structural precision beyond generic architectural fittings. Standard commercial-grade profiles fail prematurely within 24 to 36 months when exposed to the high chloride ion concentrations found in places like Galle, Bentota, and Negombo. Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) resolves these vulnerabilities through comprehensive CE marking (EN 14351-1), precision multi-point locking patents, and specialized extrusion wall thicknesses from 2.0mm to 3.0mm.

Performance Dimension	DERCHI CE Certified System	Local Commercial Fabricators	Sri Lanka Code Compliance (SLS / CIDA)
Aluminium Alloy & Temper	Primary 6063-T6 / 6061-T6 (Virgin Billet)	Recycled Secondary Scrap Aluminium	SLS 1410 Verified
Surface Pre-Treatment & Coating	Qualicoat Class 2 / PVDF >65μm (3000hr Salt Spray)	Standard Anodized 10μm (Pitting in 12 mo)	ISO 9227 Corrosion Tested
Thermal Transmittance (U-Value)	Uw ≤ 1.6 W/m²K (Polyamide PA66GF25 24mm)	Non-thermal break (Uw ≥ 5.8 W/m²K)	ASHRAE 90.1 Tropical Envelope Aligned
Wind Pressure Resistance (EN 12210)	Class C5 / Impact Laminated (3600 Pa+)	Class C2 (Sash deflection at >1200 Pa)	Meets 45 m/s Coastal Cyclonic Zones
Acoustic Isolation Index (Rw)	STC 38dB – 44dB (Argon filled acoustic PVB)	STC 22dB – 26dB (Single glaze pane)	Complies with Urban Mixed-Use Standards

Corrosion Mitigation Engineering: Qualicoat Seaside Coating

Marine atmospheric corrosion in Sri Lanka is intensified by year-round ambient temperatures between 28°C and 34°C. DERCHI enforces architectural grade pre-treatments (chromium-free conversion layers) followed by AkzoNobel Interpon D2525 fluorocarbon powder coating. This prevents filiform corrosion along mechanical mitred corners, preserving aesthetic and structural integrity even within 100 meters of open tidal breaking waves.

Localized Architectural Deployment

Application Scenarios Across Sri Lanka's Distinct Geographical Zones

From Colombo's urban condominiums to elevated tea estate boutique villas, DERCHI aluminium double doors provide calibrated thermal, structural, and acoustic solutions.

Colombo High-Rise Port City Residences

High-density towers facing Colombo Harbor face intense wind suction and ambient traffic noise. Our double-glazed acoustic double doors incorporate 6mm+12A+6mm laminated glass assemblies and concealed German hardware, cutting street-level reverberation by up to 42 decibels while preventing rainwater penetration during Southwest monsoons.

Galle & Mirissa Coastal Resort Suites

Beachfront properties demand sweeping ocean vistas with unobstructed thresholds. DERCHI flush-track aluminium bi-fold and double French patio doors feature continuous EPDM rubber seals and specialized sill drainage channels that evacuate water during squalls, preventing tidal flooding without impeding indoor-outdoor transitions.

Central Highlands & Nuwara Eliya Hill Country

The Central Highlands experience night drops below 10°C alongside high relative humidity. Thermal-break aluminium double doors engineered with PA66 polyamide insulating strips prevent condensation and mold buildup inside living spaces, cutting interior heating demand for colonial bungalows and eco-resorts.

Industry Market Trends

Fenestration Trends Shaping the Sri Lankan Construction Market

Analysis of procurement shifts among Sri Lankan architects, structural engineers, and luxury hotel developers for 2025–2030.

Transition from Timber to Precision Aluminium

Teak, Nadun, and Mara hardwoods traditionally dominated Sri Lankan entryways. However, chronic humidity causes wood to swell, twist, and harbor termites. High-end real estate developers are replacing solid wood with timber-grain sublimated aluminium double doors, delivering authentic wood grain aesthetics with zero rot, zero warping, and Class A fire safety.

LEED & Green Building Rating Demands

With commercial and mixed-use developments pursuing Green SL® Building Certification and LEED Gold ratings, energy codes require low solar heat gain coefficients (SHGC < 0.28). DERCHI double-glazed double doors with spectrally selective Low-E glass reduce overall building cooling loads by up to 31%, helping developers earn key carbon credits.

Security and Smart Access Integration

Security remains a priority for commercial properties and private villas. Specifiers are turning away from basic slide-bolts in favor of our patented Four-Side Six-Point locking systems, engineered to integrate with biometric and smart building management protocols for remote monitoring and verified forced-entry resistance.

Guangdong Dejiyoupin (DERCHI) Capabilities

World-Class Manufacturing Base in Foshan, China

For over 25 years, DERCHI has supplied architectural envelope solutions across 18,000+ landmark projects worldwide, maintaining rigorous ISO 9001 and CE compliance.

180,000m²

Foshan Intelligent Production Base

1,000,000m²+

Annual Finished Window & Door Output

100+

Independent Structural Patents

$435M

Global Project Revenue Backing (2024)

Enterprise Value Proposition

Why Major Contractors & Developers Partner With DERCHI

From raw billet extrusion to containerized shipping out of Nansha and Shenzhen ports to Colombo Port, we eliminate middleman markups and technical discrepancies.

8-Step Engineering Assurance Protocol

We support overseas specifiers through drawing reviews, custom extrusion design, structural wind load analysis, technical costing, production confirmation, and comprehensive on-site installation guidance to ensure proper threshold waterproofing.

International Accreditations Coverage

Our systems carry verified CE documentation alongside US NFRC, Australian AS2047, Canadian CSA, and high-velocity Hurricane impact certifications. Test reports are readily accessible to satisfy local structural and facade audits.

Containerized Ocean Freight to Colombo

Direct shipping lanes from Pearl River Delta ports (Guangzhou/Shenzhen) deliver containerized cargo straight to the Port of Colombo within 12–16 days. Every consignment is packed in heat-treated fumigated timber crates with anti-scratch protective films and desiccant packs.

Procurement Knowledge Base

Frequently Asked Questions by Sri Lankan Specifiers & Importers

In-depth guidance covering customs tariffs, microclimates, shipping logistics, and structural hardware engineering.

? Why should we specify CE certified aluminium double doors over locally fabricated profiles in Sri Lanka?

Local Sri Lankan fabricators frequently rely on non-thermally broken profiles pressed from recycled aluminium billets, which lack certified structural temper and can carry iron contaminants that pit rapidly in coastal air. CE certified doors under EN 14351-1 must pass rigorous laboratory tests for air permeability, water tightness, structural wind resistance, and acoustic insulation, guaranteeing verified performance for high-end developments.

? How does DERCHI ensure resistance against Sri Lanka's severe coastal chloride corrosion?

We use virgin primary 6063-T6 architectural aluminium alloys treated with Qualicoat Class 2 architectural coatings or minimum 25-micron anodic oxidation layers. All hinges, handles, multi-point lock rods, and mechanical fasteners are fabricated from 304 or marine-grade 316 stainless steel to eliminate galvanic corrosion and surface pitting in oceanfront developments.

? What glass configuration is best suited for reducing indoor heat buildup in Colombo's hot, humid climate?

For tropical maritime settings, we specify insulated double glazing consisting of 6mm solar control Low-E glass + 12mm Argon gas spacer + 6mm clear tempered safety glass. This delivers an overall U-value below 1.7 W/m²K and an SHGC under 0.28, blocking over 70% of infrared solar radiation and cutting air conditioning cooling loads without sacrificing natural daylight.

? How are customs clearances, HS Codes, and import documentation handled for deliveries to Colombo?

We supply complete commercial invoices, packing lists with itemized pallet weights, Bills of Lading (B/L), Certificates of Origin (COO), and factory CE conformity documentation under HS Code 7610.10 (Aluminium doors, windows and their frames). We coordinate seamlessly with your appointed clearing agent at Colombo Port to facilitate clearance through Sri Lanka Customs.

? Can DERCHI produce custom double door sizes matching non-standard structural masonry openings?

Yes. Every door system is custom-manufactured to structural millimeter precision based on approved shop drawings. Our design engineers coordinate directly with project architects to integrate custom structural sub-frames, sub-sills, extended structural fins, and architectural matching sidelites as required by the building envelope.

? What lead time is required from CAD drawing sign-off to delivery at Colombo Port?

Standard production turnaround runs 25 to 35 days depending on profile finishes and custom glass fabrication. Ocean transit from Foshan via Guangzhou or Shenzhen to the Port of Colombo takes approximately 12 to 16 days. For urgent project phases, staggered partial container shipments can be scheduled around your concrete pouring and installation calendar.

Plan Your Architectural Fenestration With DERCHI Engineering

Whether you are sourcing for high-rise residential towers in Colombo, a luxury boutique beach resort in Galle, or private residential villas, our engineering team will evaluate your CAD drawings, wind loads, and thermal specifications within 24 hours.