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Get a Free uPVC Window Quotation


Up to 25% off all installations in winter!!!!

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Replacement uPVC windows have gained a lot of popularity in recent years and are highly recommended by double glazing companies.

They’re effective insulators, very secure and need little in the way of maintenance. Plus, you couldn’t ask for a wider selection of colours and styles.

What are uPVC windows?

uPVC, short for Unplasticised Polyvinyl Chloride, can also be known as PVCU and is the material of choice for replacement windows in the UK. They’re widely recognised as being white but there’s almost no limit to the colours and styles available.

All uPVC windows have a steel core which helps to make them incredibly secure and durable.

What are the benefits of uPVC windows?

There are many reasons why uPVC has become the material of choice for homeowners when looking for new windows.


By far the most appealing factor of uPVC windows is the cost. uPVC window frames are considerably cheaper than timber, aluminium and composite. So, if you’re looking to replace your windows on a budget then uPVC windows are, more often than not, the best option.

Durable & easy to maintain

Timber can rot and warp while aluminium may pick up rust. uPVC, on the other hand, is non-corrosive so it will neither rust or rot and the frames. You also won’t have to worry about the cold and damp getting into your home.

While timber windows may need specialist treatments over time to maintain their appearance and prevent rot, a simple wipe down with a cloth will keep uPVC at their best.

Range of styles and colour available

Historically, one of the biggest shortcomings of uPVC was in its lack of aesthetic appeal i.e. the white plastic look. Nowadays, uPVC windows come in a range of colours. If you prefer a wood grain finish or even want your windows to look like traditional hardwood frames this can be done for extra cost.

Security options

Due to its resilience and robustness, uPVC is a very reliable and trustworthy material. uPVC window frames include a steel core, making it extremely difficult to break through or damage. While aluminium is also a great option in terms of security (and preferable to timber) uPVC is far less costly.


Double glazed uPVC windows have high insulation properties. With double glazing, the vacuum between the panes prevents the cold air and draughts from entering your home and the warm air and heat from escaping. As the windows are insulated you will also have fewer problems with outside noise coming inside.

uPVC Window styles

uPVC is a very diverse material for window frames as you can choose between a wide range of styles and colours. So you shouldn’t have much trouble finding uPVC windows to suit your home.

In terms of colours, you can take your pick from the standard white right up to bold and bright colours to make your property really stand out. Take a look at our Complete Guide to uPVC Coloured Windows.

As well as the colour, you need to think about the style. Which, when it comes to uPVC windows, can take the form of casement, cottage, bay, sash or tilt and turn. Let’s take a look at each of these in a little more detail.


A casement window is attached to the frame by one or more hinges. They give an unobstructed view through the pane and allow a great deal of light into the home. They are extremely versatile as they can be made to fit almost any height and width of aperture. Casement windows are completely sealed and therefore particularly effective at keeping heat indoors and very simple to open and close.


Cottage windows are traditionally a double hung window with an upper sash smaller than the lower. They are a great choice for older homes with a more traditional appearance. They are sometimes referred to as Tudor or Georgian windows featuring horizontal and vertical strips in the glass.


A bay window protrudes from the main walls of the home and can be a bow, box or circle in terms of design. It provides the internal room with a bay and adds a really attractive feature to many homes. Bay windows are popular with many homeowners as they increase the amount of natural light which enters the home and give a great view of the outside.


Usually associated with Victorian or Georgian homes, sash windows are glazed panels which can be opened horizontally or vertically by sliding one pane behind another. This means they don’t swing outwards or inwards which can be a great choice for homes with restricted space.

Tilt & Turn

Tilt and turn windows have several benefits for the modern homeowner as they’ve been designed with convenience in mind. They open inwards and can turn sideways for easy cleaning and maintenance. They can be opened fully to allow maximum ventilation (or even to act as an emergency escape route) or just slightly for effective but safe ventilation.

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     uPVC Window Brochure

​​Click below to view our kommerling brouchure to learn more about our profile.

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   Kommerling Windows

​Click below to read 14 reasons why your should have Kommerling uPVC Windows in your home.

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   A-Rated uPVC Windows
Click below and learn more about our A-Rated uPVC Windows and how we save customers £££'s

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