Windows & Doors
Built to Last.
Premium ALMAX aluminium fabrication for residential, commercial, and architectural projects across Sri Lanka.
Built on Precision,
Delivered with Excellence
We use premium ALMAX aluminium profiles and imported hardware to engineer window and door systems that outlast and outperform.
Premium ALMAX Systems
Top-grade ALMAX profiles delivering superior strength, weather performance, and architectural beauty.
Precision Engineering
CNC-precise fabrication ensuring perfect fit, structural integrity, and flawless finish on every unit.
Modern Architecture
Contemporary aesthetics for any building type — residential villas to commercial towers.
Professional Installation
Expert installation teams delivering flawless finish and final handover with full warranty.
Custom Fabrication
Any size, shape, or finish — fully customised to your architectural requirements and design vision.
Weather Resistance
UV-resistant, corrosion-proof, water-tight systems engineered for Sri Lanka's tropical climate.
Premium Materials
Imported hardware, high-performance glass, and powder-coated finishes with 20+ year colour retention.
Reliable After-Sales
Ongoing support and maintenance so your investment performs flawlessly for decades.
Our Products
Sliding windows, sliding folding, glass windows, fanlights & casement windows — precision-fabricated at our Weliweriya workshop.
Every product is precision-fabricated using ALMAX profiles at our Weliweriya workshop — custom sizes, any finish, island-wide installation.
Get a Free QuoteCommercial & Residential
Office Towers, Hotels & Shopping Centres
Large-scale curtain wall systems, shop fronts, and architectural glazing to international standards for commercial and hospitality projects.
Luxury Villas, Apartments & Family Homes
Architectural-grade windows and doors delivering beauty, security, and lasting performance for residential properties across Sri Lanka.
Our Process
A transparent, six-step journey from your first call to the moment your new windows and doors are installed.
Customer Consultation
We listen to your requirements, understand your vision, and assess your goals — residential or commercial.
Site Measurement
Our technical team visits your site to take precise measurements, ensuring every unit is fabricated to exact specifications.
Design & Planning
We develop custom designs to specification, selecting profile systems, finishes, glass types, and hardware to match your vision.
Precision Fabrication
CNC-precision cutting, drilling, and assembly using ALMAX profiles and imported hardware in our Weliweriya workshop.
Quality Inspection
Multi-point QC checks at every production stage before dispatch — zero tolerance for defects.
Professional Installation
Certified installation teams complete the job with minimal disruption — final handover with full warranty documentation.
Every Product, Every
Time.
Premium ALMAX Profiles
Superior strength-to-weight ratio and precision tolerances — the industry benchmark in Sri Lanka.
Imported Premium Accessories
Hardware, seals, and fittings sourced from trusted global suppliers for reliability and longevity.
Precision Fabrication
CNC-precision cutting, drilling, and assembly — every component machined to exact specification.
Powder-Coated Finishes
20+ year colour retention, corrosion resistance, and a flawless finish in any RAL colour.
High-Performance Glazing
Double-glazed, tinted, and laminated glass options for thermal, acoustic, and safety performance.
Strict Quality Control
Multi-stage QC at every production stage — from raw profile to final installation sign-off.
Trusted Island-Wide
From Colombo to Kandy, Galle to Jaffna — the same premium ALMAX quality on every project.
Weliweriya, Sri Lanka 11715
Sunday: Closed
What Our Clients Say
"Exceptional quality aluminium windows for our luxury villa in Colombo 7. Outstanding finish and flawless, ahead-of-schedule installation. Greentek Window Systems is our go-to for every project."
"Professional team, premium materials, delivered on time for our commercial office complex in Kandy. The curtain wall system drew compliments from every tenant — truly world-class work."
"Sliding doors and curtain wall system for our boutique hotel in Galle exceeded all expectations — the craftsmanship rivals what I've seen in Singapore and Dubai. Exceptional value."
Ready to Transform
Your Space?
Book a free, no-obligation consultation. Our technical team will visit your site, take measurements, and present a fully tailored quotation — completely free of charge.