Sash uPVC Windows: Pros, Cons & Costs

Sash uPVC Windows

Sash uPVC windows are made up of one or two sliding panels that work independently of one another. The bottom panel slides upwards while, if there are two sliding panels, the upper panel slides downwards.

To find out if sash uPVC windows are the right choice for your home, weigh up the pros, cons and costs in this article.


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What are sash uPVC windows?

Sash windows are made up of 2 panels, 1 of which is fixed while the second slides over the other to create an opening. Normally, the movable panel slides upwards but sash windows that open horizontally are also available.

Windows that slide to open, don’t swing outwards or inwards, making sash windows ideal for properties where space is at a premium.

What is uPVC?

Traditionally, sash window frames were made with timber, a material which needs a lot of maintenance. uPVC is a popular modern plastic alternative that needs little maintenance and is much more affordable. It is white in appearance but the choice of colours and styles is ever growing.

Benefits of sash uPVC windows

Traditional sash windows aren’t very energy efficient, require a lot of maintenance and can begin to lose their charm as the material wears away.

For these reasons, modern uPVC windows have been manufactured to replicate the aesthetic qualities of traditional sash windows and are becoming an increasingly popular choice.

The benefits of sash uPVC windows compared to traditional timber framed include:

  • Cheapest material available for sash windows
  • uPVC sash windows make for a smooth gliding action when opened.
  • A range of glazing and framing designs are available.
  • uPVC acts as a better insulator than the thinner frames of traditional sash windows – helping to prevent the heat from escaping.
  • Retains the elegance and charm of their traditional counterparts.
  • A highly secure material that can be fitted with modern locking mechanisms for additional security.

Can sash uPVC windows increase property value?

Installing new sash uPVC will help to increase the value of your home. In fact, replacing old windows with any modern alternatives will do the same.

New windows can increase security, improve insulation and the overall appearance of the property. All of which will appeal to potential buyers.


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Problems with sash uPVC windows

Being a cheap material is one of uPVC’s biggest benefits but this has its downsides too as it can look cheap.

uPVC doesn’t make for the most charming of windows. It’s a bulky white material that can look out of place on traditional homes. However, a range of colours and styles are available so it is possible to avoid the white plastic look.

While uPVC is an efficient addition to a home, it isn’t kind on the environment. Once it’s time for the frames to be replaced, they need to be destroyed and as a plastic material, this process releases harmful fumes into the atmosphere.

Finally, while there are savings to made by installing uPVC over other materials, it will need replacing much sooner than alternative options like timber and aluminium.

Sash uPVC window styles

In terms of colour, white sash windows are the most popular choice. If white is your preferred colour then uPVC is a great option as timber would need to be painted.

Traditionally, each panel of a sash window is separated into multiple square panes but how many there are depends on the style:

  • Georgian
  • Victorian
  • Edwardian
Sash Window Style Number of Panes
Georgian 6 panes over 6 panes
Victorian 2 panes over 2 panes
Edwardian 6 panes over 2 panes

These three styles all have a distinctive period look. However, modern sash windows with a single pane of glass on each panel are also available.

Traditionally, sash windows have a single movable glass pane that slides behind a fixed panel. Double-hung sash windows which feature two movable panels are also available. So, what are the benefits of being able to move both panels?

  • Easier to clean the outside of the glass from indoors
  • Choose whether to open up the top or bottom of the window
  • Have a slight opening at both sides of the window

If you’re looking for the style of a sash window but prefer windows that open like traditional casement frames, mock sash windows could be for you. Mock sash windows have the same features as sash windows – one fixed pane and one movable pane – but the movable pane opens outwards rather than sliding behind the stationary pane of glass.

How much do sash uPVC windows cost?

The two biggest factors that determine the price of sash windows is the size and the material. As we know, uPVC is often the cheapest material around, the table below shows how much you should expect to pay.

uPVC Sash Window Size (mm) Potential Cost per Window
(without installation)
500 x 500 £500 – £600
1,000 x 500 £600 – £700
1,000 x 1,000 £655 – £725
1,200 x 1,200 £750 – £850

In addition to the size of the sash uPVC windows, you’ll also need to think about:

  • Type of glazing
  • Locking mechanisms
  • Colour and style (wood grain effect for example)

While the price of sash uPVC windows begins at around £500, timber and aluminium frames can be double that price.

Sash Window Frame Material Potential Cost per Window
uPVC £500 – £850
Timber £900 – £1,750
Aluminium £1,000 – £1,500

Sash uPVC window installation

Finding someone to install your new windows is an important part of any window replacement.

All window installers set their own rates and for that reason we highly recommend comparing quotes. That way, you can be confident that you’re getting the very best deal possible.

At Windows Guide, we make finding multiple quotes easy. Simply take a couple of minutes to complete our online form and you’ll get free quotes from up to 3 qualified window installers based near you.


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