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Timber Sash Windows
Timber sash windows are a core element of British architectural heritage and are widely specified for period properties, listed buildings and conservation areas. The vertical sliding system and balanced proportions support traditional façade design while allowing controlled ventilation.
Schnauber timber sash windows combine traditional appearance with modern performance. Precision joinery, engineered timber and controlled manufacturing processes deliver long term durability, smooth operation and improved thermal efficiency without compromising historic sightlines.
All windows are manufactured to match original profiles, proportions and architectural detailing, ensuring visual consistency with Georgian, Victorian and Edwardian architecture.
Types of Timber Sash Windows
Slimlite Sash Windows
Slimlite sash windows are designed to replicate the appearance of single glazing while incorporating discreet double or vacuum glazing. Slim glazing profiles preserve traditional sightlines while improving thermal performance, making this option suitable for listed buildings and conservation area projects.
Cords and Weights Sash Windows
Cords and weights sash windows use the traditional counterbalance system found in historic properties. This system provides smooth and reliable operation and is specified for heritage restorations where original construction methods are required.
Spring Sash Windows
Spring sash windows use a concealed spring balance system instead of traditional weights. This allows slimmer frames and increased glass area while maintaining a classic sash appearance. Spring sashes are suitable for both period properties and modern buildings.
Glazing and Thermal Performance
Glazing options are available to meet different performance and conservation requirements.
Double glazing provides improved thermal insulation and acoustic performance for standard applications.
Vacuum glazing can be specified to achieve enhanced thermal efficiency within slim glazing profiles, particularly for heritage and retrofit projects where frame depth is limited.
Precision Craftsmanship and Specification
Schnauber timber sash windows are manufactured using advanced German joinery systems to ensure accurate alignment, consistent movement and structural stability.
Each window is made to order and can be fully customised including glazing specification, mouldings, finishes, hardware and performance requirements.
Schnauber is FENSA registered, ensuring all installations comply with current building regulations and recognised industry standards.
Speak to our technical team /or contact an expert to discuss your project
Quality materials and modern manufacturing methods ensure that Schnauber Timber Sash windows are guaranteed to last.
Every Schnauber bespoke timber sash window is made of high quality timber with water sealed finishes and require very little maintenance.
Our Timber Sash windows are supplied with advanced multi-point locking systems for your safety and security.
Timber sash windows use premium glazing to minimise heat loss. They retain period home character whilst providing superior insulation.
All our bespoke timber sash windows are designed with heritage in mind and can be supplied to meet any period features required.
Our manufacturing process, as well as our production of timber, is environmentally friendly.
We take pride in ensuring that our traditional timber sash windows have an authentic historic look for your periodic home.
Sash windows are suitable for any room in your property. Ideally the window size should be bigger than 90cm x 60cm. To get the most attractive results we recommend a window size of over 1.1 metres.
If you live in a Grade I or Grade II listed building or one of the 8000 plus designated conservation areas in the UK then you might have no choice but to use timber sash windows in your property. This is due to the tight regulation of the significant character of these areas. It is always advisable to contact your local Conservation Officer when replacing an existing window in a listed building or within a conservation area.
If you are renovating a Georgian, Regency or Victorian property or building a new house to one of these styles then timber sash windows are a significant feature.
If there is something internally that is front of the window, such as a sink or bath which makes it difficult to reach the window.
If there is an obstruction externally, such as a tree or a wall, which would prevent the window opening outwards then a sash window would be the perfect solution.
If you want your property to stay cool during the summer months, Sash Windows provide excellent ventilation – as hot air is exhausted, cool air is brought in.
Sash windows also provide excellent light penetration, with the light going deep into rooms due to their tall proportions.
If you are looking for a timber window that is easy to open and close.
An excellent ‘U’ Value of 1.5 W/m² is available from double glazing. The way the Schnauber sash window is constructed, using a normal double glazed unit and applying Georgian bars on top of the glazing, in between the glazing and internally, ensures a better sealed unit for improved insulation.
We use the latest in locking technology to ensure the security and integrity of your sash timber windows.
Sash windows are available in a choice of hardwood and softwood engineered timber finishes. The choice of wood will depend on budget and the visual specification required.
Although historically sash windows are painted white, in certain contexts other finishes might be more appropriate. Where this is the case, the selection of colours is unlimited.
As with other Schnauber windows, a wide selection of glass types and ironmongery can be fitted.
All of our wooden windows are manufactured from responsible and sustainable sources and certified by the Forest Stewardship Council (FSC).
The paint finishes used are the latest water resistant paints.
One sash window takes our team a day to install with all architraves and including the finishing touches.
Sash windows are generally easier to maintain than casement windows as they have fewer moving parts, so there is less to go wrong.
Schnuaber timber windows are pre-treated with a non-toxic wood preservative so maintenance is minimal. We would recommend every 5 – 10 years depending on the environment in which you live.
Schnauber’s wooden sash windows are ideal if you have young children as they provide a safer option to casement windows.
Schnauber sash windows have an additional safety feature which also offers greater protection against burglary.
From an aesthetic perspective you cannot tell the difference between a traditional sash window constructed from a single pane of glass separated by Georgian glazing bars and the Heritage Slimlite timber window which has separate panes of glass.
See how our work brings new life to every space. Each project shows the care, skill, and attention to detail that make a real difference in the final result.





