Wooden sash windows for the UK market
Timber Sash Spring and Sash Box windows
Fenestrum sash windows (Spring and Box) are crafted exclusively for the UK market—built to British quality standards and faithful to local architectural style. We produce classic sash models and can faithfully recreate originals to preserve authenticity. Marrying modern engineering with heritage design, our safe, high-performance sash windows are ideal for luxury period homes and listed or conservation properties.
General characteristics
- Sash Spring windows with Springs and Sash Box windows with weights for the UK market
- Frames, so-called box thickness 145mm, 155mm
Quality Guarantee
25 years – Timber Fungal and Insect Guarantee
10 years – Workmanship Guarantee
10 years – White Paint Finish
5 years - Stain Finish
8 years - Sealed Unit Guarantee
2 years – Draft Seal
The choice of wood
Can be made from glued studded pine beam, glued studded oak beam, fixed oak beam and other wood on the market.
Glazing options
- 24 mm thick, 2-glass package with one selective coating coated glass, with (or without) warm TGI frame
- 18 mm thick, 2-glass package with one selective coating coated glass, with (or without) warm TGI frame
- 4 mm, 6 mm glass
Finishing options
You can choose a glass package with 25 mm integrated divisions – tabs inside the package (white, brown), with duplex inside the package and wooden tabs glued on both sides on the glass package, or only with wooden tabs glued on both sides on the glass package.
Standard set-up
- 2 screwdrivers - locks
- 2 hooks for lifting the sash
Additional set-up
- 2 opening limiters
- Vent
- Other options according to the client's individual need
Coloring options
Painting with Teknos opaque paints according to the RAL palette or treated with Tekna materials, varnishing on top, wishing to see the natural texture of the wood through the given color.
Contact us
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
