Sash windows | Langvalda windows and doors manufacture
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Traditional sash box

Sash windows are made with pulleys and weights to control the opening. It is the most suitable for traditional British houses.

Traditional Box Sash Windows are made-to-measure. Windows are made out of engineered wood and supplied fully factory glazed and spray painted with a top coat. The products are finished off with top-quality sash fasteners, lifts, and pullies.

The box-sash window is mainly a British commodity that is mostly found in Georgian and Victorian households. However, more recently it has been frequently used on more modern houses to create a classic look.

Our traditional sash box windows is produced to last a lifetime.

Our sash box windows are glazed with double-glazed units which incorporate advanced thermally insulating glass to provide extremely low U-values. The efficiency is further improved by filling the cavity with Argon Gas and low conductivity Warm Edge Spacer bars to minimize heat loss on the edges and result in center pane U-values of 1.0 W/m.

High light transmittance (75%+) maximizes the entry of sunlight into your home. As well as our range of clear glass options we also have a wide choice of etched glass and extensive obscure patterned glass available in any of our windows.

glazing types

Toughened – increase strength and safety

Laminated – provides additional security over the toughened unit

Obscure – gives privacy and style to windows

*available in a wide range of patterns.



High-quality completion of our timber windows is obtained using the highest quality, ecological, water-based paints, and pickles. The finishing coat is elastic and moves together with the wood, letting it breathe. It is water soluble, moisture resistant, and fast drying finish with a long–term UV protection.

A wide variety of paints and lacquers are available to meet our customers’ requirements. All of our paints and lacquers are environmentally friendly, ecologically clean, and harmless to the environment.

LANGVALDA has unique painting technology which consist of 7 steps:
1. grinding
2. impregnation
3. priming
4. grinding
5. priming
6. grinding
7. painting

*For the oak wood, before all these steps, we are filling the pores with a pores sprayer.


One of the key factories ensuring the highest windows quality is wood and how wood is processed. Our windows are produced using laminated wood beams in Nordic pine and oak. Other types of wood such as Mahogany Sapele and Siberian larch can be both: solid and glued beams. All wood that we are using has FSC certification. It means that wood is from forests that are 100% replanted.

Wood types

  • Nordic Pine: is from the slow-grown northern forest (Siberia, Karelia). The wood is soft, medium in weight has medium density, and also has excellent fiber and characteristics: tight growth rings, resulting in natural strength.


  • Oak: the quality of oak is truly remarkable. Oak wood has a density of about 0.75 g/cm creating great strength and hardness. It is very resistant to insect and fungal attacks, also it is durable even in contact with moisture beyond all common beliefs. Oak is characterized as durable, long-lasting with a bright and strong wood texture.


  • Sapele: is hard and very durable hardwood. Solid Sapele is generally stable when dry, making it ideal for use in doors and windows. It is ideal for painted applications due to its fine graining. Sapele also has an attractive aroma resistant to insects.


  • Siberian larch: Siberian larch timber is naturally beautiful – so no finishing is required. This tree is one of the best coniferous woods in the forest, with excellent properties:
    Much lower moisture absorption levels compared with fir.
    Impregnation unnecessary.
    High durability and very resistant to rot and fungus.
    High mechanical resistance and very good pressure resistance.
    Excellent wear resistance (Class II).
    High density
    Aesthetically pleasing to the eye; warm colors from golden brown to yellow and orange in the heartwood.