Premium Aluminium Windows & Doors, Engineered in Germany. Built for India.
Merx Windgo LLP brings ROTOi aluminium window & door systems to luxury residences, architects and large-scale developments — designed for tropical climates, built to German manufacturing principles.
Aluminium Window & Door Systems for Every Elevation
From slimline sliding windows to grand lift & slide doors — each profile is engineered for performance, security and clean architectural lines. See the complete range on our products page.
Lift & Slide Doors
Expansive glass openings with effortless glide — the signature of premium villas and penthouses.
Explore Patio 130 →
Casement Windows & Doors
Slim-profile casement systems with superior sealing, security hardware and acoustic performance.
Explore FN52 Series →
Sliding Window Systems
High-performance sliding windows built for Indian weather — monsoon-sealed, dust-resistant, silent.
Explore Sliding Range →A Fenestration Partner for Large-Scale & Luxury Projects
We work as an extension of your project team — from façade concept to final handover. One accountable partner for specification, supply and installation across towers, townships and signature villas. Browse completed work in our project portfolio.
Discuss Your Project- SpecificationProfile selection, BOQ support, shop drawings and technical documentation aligned to your façade design. See the full system range.
- Supply ChainDelivery accuracy backed by Roto's global logistics network — phased dispatch matched to your construction schedule.
- InstallationTrained installation teams and on-site technical support, so quality is consistent from mock-up unit to final floor.
- After-Sales10+ year system warranty with responsive service support — protecting your project's reputation long after possession.
German Engineering. Indian Understanding.
Reliability
German engineering skills — innovative, experienced and value-adding at every stage of your build.
Tropical Design
ROTOi systems are engineered specifically for Asia-Pacific climates — monsoon, humidity, heat and coastal air.
Technical Depth
Qualified, digital-first technical support — close to the customer from drawing board to site.
Range & Depth
An interconnected system portfolio — economical to specify, seamless to combine across a full elevation.
Site Photos & Product Videos
A closer look at finished installations and ROTOi systems in use. More coverage lives on our Instagram and YouTube channels.
Photos
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Videos
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Do you supply for builder and developer projects? +
Yes. Merx Windgo works directly with builders, developers and architects across India — from BOQ and technical drawings to fabrication, delivery scheduling and on-site installation support for multi-unit projects. See how we work with project teams.
What warranty do ROTOi systems carry? +
ROTOi systems are engineered to German manufacturing principles and carry a 10+ year warranty, backed by Roto's global network of production sites and distribution centres.
Which cities does Merx Windgo serve? +
We execute projects pan-India, with dedicated presence in Mumbai, Pune, Ahmedabad, Bangalore and Chennai.
How is ROTOi different from standard aluminium windows? +
ROTOi is engineered specifically for Asia-Pacific climates on German manufacturing principles, addressing monsoon, humidity and heat conditions that standard profiles aren't designed around. Compare systems on our products page.
Specify ROTOi for Your Next Residence or Development
Share your drawings or site details — our team will respond with profile recommendations, timelines and a detailed quotation.