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Published on May 23, 2023 8:22 PM

Here at Colin’s Sash Windows we pioneered the interruption of the double glazed sash windows market in the UK in 2014 by supplying uPVC sliding sash windows at one fixed price for any size. Before this they were primarily sold by local window installation companies as a supply and fit product or at highly inflated supply only prices.We started with the Ecoslide windows profile which is a good system but didn’t have all the options our customers wanted. Because of that, we’ve chosen one of the best uPVC sash windows available from Spectus sash windows.

Because of high inflation and energy costs our pricing model has slightly changed. There a few different prices depending on the size but our uPVC sash windows cost is a lot less than many of our competitors. As of 2023 our double glazed sash windows cost from £270 plus VAT.

Today we’re one of the UK’s biggest sash window suppliers, with unrivalled experience and after sales service. We’re the sash window specialists! We’re a nationwide sash window company. So if you want to reduce your sash window cost… click here for more details.

Dark Grey - Half-Georgian style window

Some history of sash windows

The sliding sash window has a long and rich history in the UK, dating back to the 17th century. They were first introduced during the Georgian era, which spanned from 1714 to 1830, and quickly became popular due to their unique design and functionality.

Georgian sash windows, the earliest box sash windows were made from timber and featured a sliding mechanism that allowed the window to be opened and closed easily. The vertical sliding window design consisted of two sashes, one above the other, with the bottom sash sliding upwards to allow fresh air into the room. The top sash, when opened in conjunction with the bottom sash allows hot air to escape from the room for great ventilation in the summer. This is even more effective with large sash windows that go from floor to ceiling.

In the 18th and 19th centuries, sash windows evolved to include more decorative features, such as ornate mouldings and glazing bars. The Victorian era, which began in 1837 and ended in 1901, saw the rise of more elaborate and decorative Victorian windows design, featuring intricate detailing including sash window horns and colourful stained glass. Victorian sash windows in two up two down terraced houses were often simpler in design with just sash horns and no glazing bars.

During the early 20th century, Edwardian sash windows were still popular but later fell out of favour as more modern designs, such as casement upvc windows, became popular. However, sash windows remained a staple in traditional homes, and many architects and designers continued to incorporate them into their designs.

Sash windows can be referred to as sash and case windows (usually in Scotland), box sash window (referring to the boxes holding the lead weights in timber windows) and vertical sliders to name a few.

In summary, sash windows have been an important part of UK architecture for centuries, evolving in design and style over time. They continue to be a popular choice for homeowners looking to add traditional charm and character to their homes.

White upvc window - single bar

General information

Materials: Sash windows are available in various materials. UPVC are the most popular. Aluminium sash windows and wooden sash windows cost a lot more. Each material has its benefits, so choose the material that best suits your needs. For instance, timber sash windows are attractive, eco-friendly and durable, but they require regular maintenance. Aluminium sash windows are possibly the longest lasting. They’re also 100% recyclable and are usually supplied in commercial buildings such as hospitals or offices. UPVC sash windows, on the other hand, are low-maintenance, energy-efficient and affordable. They’re also 100% recyclable. Upvc can replicate many of the features of a traditional sash window. In fact, at Colin’s Sash Windows many of our customers say they can’t tell the difference. Our uPVC sash windows cost from £270 plus VAT!

Glazing: Modern sash windows are generally double glazed. Triple glazed sash windows are less common. Double glazed sash windows offer better insulation and reduce noise (especially with acoustic glass) compared to single glazed windows. They also improve the energy efficiency of your home and can lower your energy bills.

Security: Sash windows can be vulnerable to forced entry, so look for windows with a robust locking mechanism. You should also ensure that the window frames are made of strong and durable materials, strengthened with galvanised steel. Many upvc sash window suppliers also offer PAS24 upgraded security making them almost impregnable.

Style: There are many different types of upvc sash windows in different styles, including uPVC Victorian sash windows, Georgian sash windows and Edwardian. They can be joined together to make double sash windows and triple sash windows. UPVC sash bay windows, usually with 2 sides can make a room feel bigger and let more light into the room. Choose a style that complements the architecture of your home.

Maintenance: Regular maintenance is important to keep your sash windows looking and functioning their best. Timber sash windows require more maintenance compared to UPVC sash windows. UPVC sash windows only require occasional cleaning with soapy water and a soft cloth.

Repairing sash windows vs sash window replacement cost: With the low price of new uPVC sash windows restoring sash windows can be nearly as expensive as installing new double glazed uPVC sash windows.

Sash window installation: Competent DIY’ers can install their own plastic sash windows or it can be done by builders or carpenters. We have a measuring guide here.

Colours: Coloured sash windows are available in a variety of finishes. There are standard colours in woodgrain finishes. Additionally they can be sprayed to give a smooth finish in any RAL colour. The best selling colours for your new sash windows are:

  • Black sash windows
  • Grey sash windows
  • Cream sash windows

Overall, when choosing bespoke sash windows in the UK, consider your budget, style, energy efficiency, and security needs. With the right choice of materials, glazing, and installation, sash windows can enhance the look and energy efficiency of your home for many years.

Colin Greenslade
Written by Colin Greenslade
I'm the founder of Colin's Sash Windows. I disrupted the sash windows market in the UK in 2014 by introducing fixed prices for uPVC sash windows in the UK. Before this they were generally only available at very high prices through window installers. Today our business is one of the market leaders in supply only windows, doors and roofs in the UK.

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