Frequently Asked Questions

Wooden windows provide up to 400 times better insulation than steel and 1,800 times better than aluminium. Wood is a natural, renewable material with timeless aesthetics that can be endlessly customised. Unlike PVC which degrades, timber windows can be restored throughout their lifespan. Explore our full product range.
400x better insulation than steel

Pine windows last 50 to 60 years, hardwood options like oak and meranti exceed 80 years. Many timber windows across Europe remain functional after more than a century. Our laminated timber with kiln-dried wood and factory-applied coatings ensures maximum stability from day one.
80+ years for hardwood

Modern factory-finished windows need less maintenance than expected. Clean frames two to three times yearly, inspect coating for wear. Fresh paint or stain every 8 to 12 years. For virtually zero maintenance, consider our wood-aluminium option with exterior aluminium capping.

Wood stores carbon throughout its lifespan and requires significantly less energy to produce than PVC or aluminium. We hold ISO 14001 environmental certification and source from responsibly managed forests. Read more about our company and heritage. Timber windows biodegrade naturally at end of life.

Our 92mm profile with quadruple glazing achieves Uw 0.6, exceeding Passive House requirements. Triple glazing reaches Uw 0.78. The 68mm profile delivers Uw 1.3 to 1.5. See our thermal performance page.
Uw 0.6 quadruple glazed

Triple glazing: three panes, Ug 0.5 to 0.7, the standard across Scandinavia and Germany. Quadruple: fourth pane pushes Ug to 0.3 to 0.5. Quadruple is ideal for passive houses, triple offers the best cost-to-performance ratio for most projects.

Fire-rated windows certified to EI-30, EI-45 and EI-60 by TUV EESTI under EN 16034. EI-30 maintains integrity for 30 minutes, EI-45 for 45, and EI-60 for a full hour. Custom orders up to EI-90 available. Laminated timber with specialised fire-resistant glazing. CE-marked for all building types.
EI-60 fire protection

CE marking under EN 14351-1. ISO 9001 quality management. ISO 14001 environmental. Secured by Design (UK police accreditation). All hardware meets European security standards up to RC2. See all 41 test reports and certificates.

Three systems: ECO 68 (68mm, double/triple, Uw 1.0-1.3), ECO 92 (92mm, triple/quadruple, Uw 0.67-0.78), and Premium 115mm (Scandinavian type, outward opening, same glass as ECO 92). All from multi-layer laminated timber. See window profiles comparison.

GU (Gretsch-Unitas) from Germany for inward opening and sliding systems. ASSA ABLOY for Scandinavian windows. Five handle models: DIRIGENT, ADAGIO, MODENA, SAN REMO, SOPRANO in six finishes. Upgradeable to RC2 burglar resistance. Siegenia hardware also available as alternative.

Pine (economical, Baltic), Larch (moisture-resistant, coastal), Meranti (tropical, exceptional stability), Oak (premium, heritage). Full comparison on our window profiles page.

Our 14,000 m2 factory produces tilt-and-turn, Scandinavian outward-opening, fixed picture windows, sliding systems, arched, circular, trapezoidal. Plus entrance doors and patio systems.

Every window is made to measure: profile depth, wood species, glazing, hardware, opening direction, any RAL colour. Non-standard shapes and oversized units available. Our team works directly with architects on specifications. See our technical resources for professionals.

Send enquiry with drawings or measurements. We prepare a detailed quotation, verify dimensions on confirmation, manufacture at our Kalnciems factory. Quality inspection and CE documentation included. Learn about our full-cycle service from design to installation.

4 to 8 weeks from order confirmation. Fire-rated and quadruple-glazed may need extra time. Large projects: order 10 to 12 weeks ahead.
4-8 weeks production

All EU member states. Germany and Scandinavia are primary markets. Protective wooden crates for safe road transport. Free movement of goods: no customs, no import complications, no border delays.

Yes. Our team handles the complete process from old window removal to final finishing. We use the Illbruck i3 sealing system for maximum insulation performance. Available across Europe including one-day window replacement. Learn about our installation services.

30 to 40 percent below comparable products, same technical standards. Competitive Latvian costs, vertically integrated 14,000 m2 factory. See pricing advantage explained.
30-40% below Scandinavian

Total cost over 50+ years is often lower than PVC (needs replacing after 20 to 25 years). Superior thermal and acoustic insulation with measurable energy savings. Quality wooden windows return up to 95% of cost in property value. See our homeowner guide with energy calculator.

Comprehensive manufacturer warranty: structural integrity, glazing seal, hardware functionality. ISO 9001-certified quality management and rigorous factory inspection keep warranty claims exceptionally rare.