Get the best factory-direct price on timber windows and exterior doors
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To receive a quote right away, please provide as many accurate details as possible—product names, dimensions, quantities, thermal class, and any other relevant information.
If you’d like to see our production first-hand and discuss your project at the factory, please arrange a visit in advance using the contacts below. You’ll be welcomed and advised by our production manager and/or founder.
+370 620 77 690
info@fenestrum.lt
Pramonės g. 15, Šveicarija, Jonava District Municipality, LT-55302, Lithuania
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Aik Kanchinian
manager
At first glance, the window is only a glazed rectangular shape and it seems that all manufacturers have the same shape. But the differences become clearer over the years. Then it is seen whether high-quality wood has been used, reliable fittings have been put together, or good painting materials have been used. Windows made by two manufacturers may look the same on the first day, but after five years, built next to it, it can vary greatly. When making windows, we use only the best materials on the market, but even the best materials are available to everyone. What is inaccessible to everyone and what distinguishes us is the attitude to the product we produce, the desire to make it so that its durability is difficult to surpass in the market, and the only human resonance about us would be a good recommendation.
Dmitrijus Gailiūnas
production manager
At the age of seventeen, together with my father and his friend, I began to make wooden windows with machine tools built in the garage. We handcrafted them for a neighbor, then for a neighbor's friend, then for the brother of a neighbor's friend, for his friend, and so on. There was no advertising, except for recommendations, at that time, but not long after, a queue of people who wanted to order windows was already standing outside our garage. In addition to the fact that the craft was close to the heart, I also understood its prospects, so I began to study for parallel work, and for the final thesis I chose the production of wooden windows. I wanted to know my chosen field from A to Z. So from my youth to the present day I am engaged in the only activity that I love – the production of wooden windows. My or my team's hand-made windows serve a wide variety of people all over Lithuania and beyond, especially in England. I sleep peacefully, because I believe that the product that delights me also delights my client. My goal has always been and always will be sustainable production and ecological success.
From our hands to your home
What is inaccessible to everyone and what distinguishes us is the attitude to the product we produce, the desire to make it so that its durability is difficult to surpass in the market, and the only human resonance about us would be good is the recommendation.
Why Fenestrum?
- 25+ years of experience manufacturing high-quality wooden Euro-standard windows, exterior doors, and PSK and HS terrace doors and windows.
- 20+ years in UK heritage restorations—authentic sash & casement windows and doors, fully compliant.
- Competitive factory pricing—no middlemen.
- Every piece is finished individually—sanded, primed, sealed, and hand-painted, then topped with a glass-smooth glaze.
- Built with Roto Frank AG hardware and Teknos finishes for European reliability.
- Engineered, knot-free glulam (laminated timber, quarter-sawn) — warp- and split-resistant, bonded with moisture-resistant adhesives.
- Energy-efficient insulated glass units (Uw down to 0.5 W/m²K): standard, safety, acoustic, and solar-control options.
- 78 & 100 mm Euro-profile windows: high thermal efficiency (Uw down to 0.8 W/m²K*) and excellent sound insulation (Class A–A++).
- For extra protection from sun, wind, and rain, we add aluminium cladding.
- 5-year coverage on products and 2-year coverage on hardware, with professional support.
- Our Lithuanian factory ensures a transparent process, clear lead times, and timely communication.
- See our production process and craftsmanship quality first-hand at our factory.
- Built to handle complex projects—with truly personal service.
- Corner joints are locked with premium mortise-and-tenon joinery and weather-resistant adhesive for decades of performance.