Seven product lines handcrafted in our Latvian factory. Engineered for European climates, exported to 19+ countries. Uw from 0.6 W/m²K.
All timber windows and doors are manufactured with engineered laminated timber (Pine, Oak, Meranti, Larch), 41 independent certifications including PAS 24, ISO 9001, and EI-class fire rating. Optional aluminium exterior cladding for zero maintenance. Three profile systems: ECO 68, ECO 92, and more. See our glazing options for detailed glass specifications.
Uw 0.6
Most Popular
Four panes of glass. Uw 0.67 W/m²K on ECO 92 (inward tilt-turn), or Uw 0.6 W/m²K on Premium 115 (outward Scandinavian) - the best in our range. The ultimate in thermal performance for passive houses.
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14 Configs
Tilt and turn mechanism with 14 opening configurations. Two profile options: ECO 68 and ECO 92.
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Outward
Classic outward-opening design preferred across Scandinavia. Built exclusively on our dedicated Premium 115 profile (115mm). Superior ventilation, weather resistance, and timeless Nordic aesthetics.
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Oertli 68+56
Dutch timber window with inward-opening tilt-turn mechanism rooted in the canal-house tradition. Oertli-designed profile in 68mm and 56mm depths, Donau espagnolette hardware, GLAS 24 insulation glazing.
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Aluclad
Warm wood interior with a protective aluminium exterior. Available on all three profile systems (ECO 68, ECO 92, and Premium 115). Zero maintenance outside, natural comfort inside.
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EI-60
EI-30, EI-45 and EI-60 fire-rated wooden windows, certified by TÜV EESTI. Available on all three profile systems: ECO 68, ECO 92, and Premium 115. Custom orders up to EI-90 for specialised projects.
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Lift & Slide
Lift-and-slide mechanism on ECO 92 profile. Floor-to-ceiling glass, effortless operation, maximum natural light.
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Bespoke
Custom-designed entrance doors in oak, pine, meranti, or larch. Every door built to your exact specifications.
View ProductFrom our factory in Kalnciems, our timber windows and doors ship to homes, passive houses and heritage restorations across three continents.
41 independent test certificates from TUV EESTI, Inspecta, KIWA, and Kaunas University.
Every order is built to your exact specification - dimensions to the millimetre, timber species (pine, oak, meranti or Siberian larch), profile depth (68 to 115 mm), glazing from double to quadruple, opening mechanism, hardware finish, and paint or stain colour. 14 documented configurations cover most briefs; anything outside that, we engineer. See profile specifications for the options that decide thermal and security performance.
We do not resell. Every window and door leaves our own factory in Kalnciems, Latvia - CNC-cut, hand-assembled, surface-finished and quality-checked under one roof by the Tretjakov family team. This is why we can answer engineering questions directly rather than redirecting to a supplier, and why a change-order on week 3 is usually possible. About our factory.
Orders ship to 19+ countries across Europe, North America and Oceania - from Iceland and Norway to Canada and New Zealand, via Germany, Austria, Switzerland, France and the UK. Every shipment is packaged for long-distance freight: protective frames, glazing guards, labelled pallets, and installation documentation in English. For B2B clients - architects, main contractors, developers - we supply CAD details, U-value calculations and tender-ready specifications on request. Talk to us via the contact page, or start specifying your build with our window configurator.
Our team will recommend the right window or door based on your building, climate, and budget.
