Wooden sash windows

At Timber Windows, we specialise in the manufacturing and installation of bespoke wooden sash windows, designed to enhance the character of your home. Combining traditional techniques with innovative wood technology, we create timber box sash windows that are high-quality and offer superior functionality and durability.

Why not transform your home exterior with our wooden sliding sash windows? Tailored to your preferences and built to stand the test of time.

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What is a sash window?

Wooden sash windows are commonly found in traditional properties. The term ‘sash window’ generally refers to any window that doesn’t open on a hinge, like a casement window.

These windows consist of one or more movable panels, known as sashes, that slide vertically or horizontally within the frame across grooves.

These windows offer a timeless aesthetic appeal and can be customised by our team to suit various architectural styles.

How do sash windows work?

Timber sash windows work via window panels that sit in frames with vertical grooves, allowing them to move up and down smoothly when opening or closing the window. This structure allows the wooden sashes to move without risking the frames rubbing against each other and becoming damaged.

The up-and-down movement of the panels is then supported by counterbalances, usually compromising weights on cords and pulleys. Whilst these mechanisms can be hidden within the wooden frame of your window, we can leave them exposed on the inside of the window depending on your preferences

What are the benefits of wooden sash windows?


For period properties, wooden double-glazed sash windows help to maintain the authenticity and character of the property. However, sash windows can be installed on any style of home to provide timeless charm and enhance its architectural appeal.


When properly maintained, our high-quality wooden sash windows can last for decades. Due to wood being durable and robust, it is a reliable choice for long-lasting window frames. We also use specially engineered wood to prevent warping and twisting in the window’s structure preventing any untimely damage.


Wood is a renewable resource, which makes our timber sash windows a much more eco-friendly option than other products on the market.


Timber is a natural insulator, offering excellent thermal performance. Our timber double-glazed sash windows help to minimise heat loss during the winter and keep interiors cooler in the summer, reducing your energy bills.

Why do sash windows cost more than other styles of windows?

The installation of wooden sash windows can be slightly more costly compared to other window styles due to a range of factors. Mainly, their more complex design often requires more time and attention to detail during manufacturing and installation. This is to ensure that features, such as weights, pulleys, and counterbalances can be hidden.

Choose Timber Windows for your wooden sash window fitting

When it comes to installing wooden sash windows, Timber Windows offers a timeless blend of elegance, durability, and sustainability. Our windows not only enhance the aesthetic appeal of your home but also provide excellent durability, ensuring a cost-effective solution.

With their classic charm and natural beauty, our wooden frames seamlessly complement both traditional and contemporary architectural styles, adding character to any home. With a wide range of door furniture and RAL colours to choose from, we can make sure your new wooden windows fit your aesthetics exactly.


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  • white wood bay window
    Sash Window
  • large house with white wooden sash windows and sage green wooden door
    Sash Window
  • white wooden panelled front window
    Sash Window
  • house with green timber windows
    Sash Window

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Not what you're looking for? why not take a look at our casement windows here