uPVC Windows | The Energy Efficient A Rated Windows

Increasing numbers of home owners are retrofitting their houses with uPVC windows, find out why they are the popular choice.

If you are in the process of building or renovating your house, you are going to face a dilemma, which type of window to install in your home. There are single, double and triple glazed windows available on the market.

Naturally, the price for some double and triple glazed windows might push the limits of your bank account. So, you may ask yourself whether it is worth paying extra for these types of windows.

We’ve gathered all the information about uPVC windows, including the manufacturers, styles and prices to help you make the right decision and choose the option that’s best for your home.

What’s In This Guide?

Head straight to the section you need by clicking the links below.


Most Popular Choice In The UK

Among the types of double glazed windows, uPVC windows are the most popular choice in the UK. This is not surprising since they have multiple advantages. But the two that stand out, are that they are both cost-effective and easy to maintain.

For those on a budget, you might consider secondary glazing as an alternative. Whilst not as energy efficient, it is friendlier to the bank balance.

What are uPVC Double Glazed Windows?

UPVC is a type of material used to make the frame of the double glazed windows. The basis of this material is the plastic powder (unplasticized polyvinyl chloride). To form the shape, the material is heated up and then inserted into a mould. Various methods are applied to cool it off after which it is put together with the two panes of glass and the component parts of the window.

Whilst uPVC isn’t the only material used to make double glazed windows. And you can get windows made of wood or aluminium. But neither are as cost effective or suited to our temperate climate. Aluminium, in particular doesn’t have the same insulating attributes. 

How uPVC Double Glazed Windows Work

The principal feature of uPVC double glazed windows is the space between the two sheets of glass.


It creates the gap where the air (or a gas such as argon) is trapped. In this case, the air works as insulation, which means that neither cold air nor hot can pass inside (or outside) the house. It also reduces the condensation when there’s cold air outside and warm air inside. Another advantage of a uPVC window is that they minimise the noise from the outside passing through the glass thus reducing the noise pollution.

How Much Do uPVC Windows Cost?

There are several factors that affect uPVC window prices, such as type, style and size.

In the table below, you’ll find estimates for replacing all the windows in your home.

Here are the average prices for a range of different types of uPVC windows but remember, without knowing your exact window size, it’s difficult to give you an accurate estimate and these numbers will really just give you a ball park figure.

Tilt & Turn Window Prices

Tilt and turn uPVC windows are more expensive than the other options. And this is due mostly to the higher level of engineering needed to manufacture them.

Bay Window Prices

uPVC Bay windows are a great option as they really brighten up any room. Because of the larger number of window panes used, they will run your budget down though.

The Advantages

Of all the materials that double glazing comes in, uPVC is the cheapest option. That doesn’t mean you are not getting quality though.

Insulation is another significant benefit. The way uPVC windows are designed, they preserve the right level of heat inside the premises as well as effectively reduce the noise from the outside.

Unplasticized Polyvinyl Chloride is one of the most durable materials used for double glazed windows. Unlike aluminium or wood, this material doesn’t rust or rot which makes it sturdy and dependable. Warranties usually last for 10 years.


UPVC windows are produced in many different styles, shapes and sizes so that they are suitable for any house.  Recently, they are also available in different colours. Traditionally, this type of window was designed only in white.

The Disadvantages

Although it is true that there are a range of styles and colors of uPVC window available, some people still find the white plastic unattractive in comparison to aluminium or wood. Therefore, if you are looking for a particular aesthetic and more stylish look, these may not completely satisfy you.

Due to the materials used, uPVC windows are lightweight which is great for the manufactures and the installers. But they can bend or warp in some situations. Basically, they are not as strong as aluminium windows, and  can sometimes break.


Unlike wooden or aluminium frames, these windows can’t be varnished or painted which makes adapting them to the style of your house a little more complicated.

How Energy Efficient Is uPVC?


Since the average uPVC window provides a high level of insulation, keeping the heat inside your house, you’ll reduce your heating bill.

uPVC Window Manufacturers & Suppliers in the UK

Finding the most reliable company that will provide you with a quality solution can be tough.

If you want to know more about energy efficient glazing, take a look at our guide to double glazed units.

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Last Updated on October 28, 2021


Author: Indra Gupta

Indra is an in-house writer with a love of Newcastle United and all things sustainable.

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