Last Updated on April 22, 2025

What Are Sash Windows?

When it comes to choosing windows for your home, the style and functionality of the window can significantly impact both the aesthetics and performance of your property. One such window style that has stood the test of time is the sash window. 

If you’re wondering, what are sash windows, and whether they are the right choice for your property, this comprehensive guide will give you all the information you need.

What Are Sash Windows?

Sash windows are a traditional window style commonly found in Georgian, Victorian, and Edwardian homes across the UK. They are made up of one or more movable panels, or sashes, that slide up and down within a frame. 

The purpose of these windows is not only functional, allowing for ventilation and easy cleaning, but also aesthetic, as they add a touch of classic elegance to any property.

These windows typically consist of two main sashes – the top sash and the bottom sash – each containing glass panes. They are designed to slide vertically within the frame using either a pulley system with cords or, in modern versions, a spring-loaded mechanism. 

Sash windows are ideal for providing ventilation without compromising on security.

History of Sash Windows in the UK

Sash windows have a rich history in the UK, originating in the 17th century and becoming a hallmark of Georgian and Victorian architecture. Their use grew during the Industrial Revolution, where mass production of glass allowed for larger windows. 

Today, sash windows remain popular in period properties due to their timeless appeal and functionality.

Types of Sash Windows

There are several types of sash windows, each with its own set of characteristics and benefits. The two most common types are:

1. Single-Hung Sash Windows

This style features one movable sash (usually the bottom) and one fixed sash. This type of window is often found in older properties and offers the classic look and function of traditional sash windows.

2. Double-Hung Sash Windows

Double-hung sash windows have both the upper and lower sashes that can be moved, allowing for more versatile ventilation options. These windows are highly popular due to their ease of use and ability to create better airflow, especially in warmer months.

3. Sliding Sash Windows

A variation of the traditional design, sliding sash windows move horizontally rather than vertically. This type of window can be a good choice in areas where vertical movement is restricted but the need for functionality and style is still desired.

4. Victorian and Georgian Sash Windows

Victorian sash windows often feature heavier, more intricate detailing, while Georgian sash windows are characterised by a simpler design, often with a grid pattern that divides the glass panes.

Why Choose Sash Windows?

There are numerous reasons why you might want to choose sash windows for your home, from their aesthetic appeal to their practicality. Let’s dive into the top benefits of installing sash windows:

1. Aesthetic Appeal

Sash windows are known for their timeless elegance, making them a popular choice in period homes, as well as modern builds seeking a classic touch. Their symmetrical design and distinctive features, such as the exposed timber frame, make them a focal point of any room.

2. Ventilation

One of the key advantages of sash windows is their ability to offer controlled ventilation. By sliding the top and bottom sashes, you can create an effective airflow that helps to regulate the temperature inside your home. This is particularly beneficial during the warmer months.

3. Energy Efficiency

When properly maintained, sash windows can provide excellent insulation, reducing heat loss during the winter months. Modern sash windows also come with improved sealing and glazing options, helping to maintain the internal temperature and reduce energy bills.

4. Security

Sash windows are designed with safety in mind. Their robust construction and the use of modern locking mechanisms ensure that your home remains secure. The option to add additional features, such as security bars or multi-point locking systems, can further enhance their security.

5. Low Maintenance

Although older sash windows may require regular maintenance, modern versions come with improved materials such as UPVC or double-glazing, which are more durable and require less upkeep. 

Regular cleaning and occasional servicing will ensure that your sash windows continue to perform at their best.

Sash Windows Prices

The cost of sash windows can vary depending on factors such as the material, size, style, and the complexity of the installation. On average, you can expect to pay between £400 and £1,200 per window, with higher-end options or bespoke designs costing more..

How to Maintain and Care for Sash Windows

Sash windows, especially older ones, can require regular maintenance to ensure they remain functional and attractive. Here are a few tips for keeping your sash windows in tip-top shape:

1. Cleaning the Sashes

Regular cleaning is essential to keep your windows looking their best. Use a mild detergent and a soft cloth to clean the sashes and glass. Avoid using abrasive materials, which could damage the finish.

2. Lubricating the Mechanism

The sliding mechanism can become stiff over time. Regular lubrication of the moving parts will keep the window sliding smoothly and prevent damage to the mechanism.

3. Checking for Draughts

Old sash windows can sometimes develop gaps that allow draughts to enter. Sealing these gaps with weather stripping or draught-proofing seals can help improve the window’s energy efficiency.

4. Inspecting for Damage

Regularly inspect your sash windows for signs of wear, such as cracked glass, damaged sashes, or rotting timber. Catching issues early can save you money on costly repairs down the line.

Comparing Sash Windows to Other Window Types

When choosing the right window style for your home, it’s essential to compare the options available and determine which one best suits your needs, preferences, and budget. 

Sash windows offer a unique set of benefits, but they may not be the perfect fit for every property. To help you make an informed decision, let’s compare sash windows to some other popular window styles commonly used in the UK.

Casement Windows

Casement windows are hinged at the side and open outward, often using a crank or handle. Here’s a quick comparison with sash windows:

• Ventilation: Both offer good airflow, but casement windows provide more ventilation when fully open since they swing like a door.
  
• Aesthetic Appeal: Sash windows add a classic, elegant charm, perfect for period homes, while casement windows have a modern look that might not suit traditional properties.
  
• Energy Efficiency: Casement windows are generally more energy-efficient due to their tighter seal. Older sash windows may allow drafts, but modern double-glazed sash windows perform better.
  
• Maintenance: Sash windows, particularly timber versions, need more upkeep compared to the typically low-maintenance casement windows.

For a more detailed comparison, check out our sash vs casement windows article.

Are Sash Windows Right for Your Property?

If you’re considering sash windows for your home or commercial property, it’s important to weigh the benefits and costs. They are particularly ideal for period properties, as they enhance the historical charm and elegance of your building. 

However, they can be a great choice for modern homes looking to add character.

If you’re unsure whether sash windows are the best choice for your property, consider consulting with a professional window installer. They can help you decide on the best style and material to suit your home’s unique needs.

Request a Free Window Replacement Quote Today!

Ready to transform your home with beautiful, functional sash windows? Don’t wait – request a free window replacement quote today and take the first step towards upgrading your property. 

Our team of expert installers is here to help you choose the perfect windows for your needs, budget, and style.