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Timber sash windows supplier and installer

Osborn Windows > Windows > Timber Window Supplier & Installer > Timber sash windows supplier and installer

Timber or wooden sash windows are a popular choice, especially for homeowners in areas of natural beauty or conservation. They’re perfect for properties with heritage status. 

Yet, regardless of your properties status, you can choose wooden sash options without having to worry about compromising on performance or security. So bring your Victorian, Edwardian or Georgian style home into the modern day with our timber range. 

London, Clapham Sash Window
UPVc Box Sash Windows, Conservation Area KT3

Handcrafted box sash or sliding windows

Our bespoke timber box sash/sliding sash windows are handcrafted and designed to take double glazed sealed units. We offer these in various depths and specification to ensure your thermal and acoustic requirements are met. Using weights and pulleys, these modern windows replicate traditional vertical sliding sash windows with the benefits of a modern, long-lasting window. These also come with slimline sashes for maximum glass exposure.

Timber Frame Options

Our vertical sliding timber sash windows are available in a wide range of styles, colours and opening options. Frames can be manufactured using different grades of timber, including Accoya, Sapele, European Redwood. Nordic Pine, Siberian Larch and our Oak range are engineered wood to offer extra strength and reduce expansion and contraction.

Ironmongery and Working Mechanisms

You have a choice from a range of furniture options and working mechanisms, giving the windows an authentic look and feel. Complete with sash lift handles and central sash ring with locking fitch fasteners.

Choose from solid brass, chrome and stainless steel. It operates on sash cords, ball race pulleys and sash weights, our sash slider also has the facility to restrict the opening to 100mm, which is provided using a twist lock. Additional security can be provided using a second twist lock, but this option is not available with internal horns.

Timber Sash Colour Options

Our timber, wooden sash windows are available in a wide array of colours, from the translucent collection and the opaque collection. We use a trade strength paint called Teknos and offer a 6 or 12-year guarantee on the paint finish.

Better glazing options

The current building regulation for replacement windows requires a minimum of a C energy rating. Osborn Glass as standard offer the higher A-rated windows. There is now an option to enhance the energy-saving with triple glazed windows. All the sealed units can be putty fronted or beaded to complete the original sash window look.

Our windows are glazed with clear or obscure Pilkington glass, depending on your requirements. There are many different types of decoration that can be applied. By applying lead, Georgian bar or even a stained glass design to the window you can add that personal touch. For the range of glass options please see our glass and glazing page.

Timber window brochures

Certass accredited

Approved Agents For The Sollex Collection.


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