Double Glazed Units: Complete 2024 Guide for Frames and Panels in the UK

Double glazed units (double glazing), which fit within doors or window frames, consists of two or three glass panes separated by a space filled with air or gas to reduce heat transfer between your home and the outside. The thickness of the glass ranges from 3 to 10 mm, but special applications may require thicker layers.

Over the last few years, the number of double glazed unit companies in the UK grew rapidly and now vary from large chains to small family businesses. Double glazing has expanded to include a wide range of different types of glass and frames. But why have double glazed units grown in popularity so fast?

Double glazing tackles the problem of heat loss and noise pollution, and consequently, helps to save on bills, while at the same time reduces homeowners’ carbon footprint.

If you’re considering buying double glazed windows or doors but want to avoid a time-consuming process of researching the best suppliers, simply fill in the form at the top of this page. We will provide you with up to 4 quotes from reliable suppliers in your area. The service is free of charge and doesn’t require any further obligations.

The price depends on several factors you should take into consideration before making a final decision. These include the amount of double glazed windows and doors you need, glass type, the material of the frames, shape, and style of the products.

The most popular material used for double glazing frames is uPVC because of its low price and efficiency. On the other hand, aluminium and wooden frames are usually more expensive, although the functionality doesn’t necessarily exceed uPVC.

Regarding the style of the double glazed windows, casement and sash uPVC windows are the most popular options in the UK. The table below provides an estimated cost assessment of the following two types.

Similarly to double glazed windows, uPVC frames are the cheapest choice, whereas timber and aluminium doors are commonly more pricey. When it comes to the shape and style, sliding double glazed patio doors are the most affordable option. Folding and bi-fold doors are more expensive due to their complexity. However, because these three styles are the most popular in the UK, we included them in the price guide table below.

Remember that the costs depend on each individual case and numbers do not represent actual offers. They are merely for general reference.

We know that finding the right double glazing installers may seem difficult. GreenMatch can help make this process far easier and quicker for you. It's simple: we connect you with up to 4 professional UK double glazing installers who will provide you with free quotes. There is no obligation and the service is completely free. Simply click the button below, fill out our quick form and we will do the rest.

Double glazing can help you reduce your energy usage, and consequently, lower your CO2 emission, making your home more environmentally-friendly.

Up to 70% of household heat is lost due to poor insulation when installing single glazed windows. You can avoid this with the help of double glazed units because they significantly reduce your energy consumption and can help you save up to £2,800 over 20 years.

They are able to reduce the noise coming from the outdoors by 60%. This is a great advantage for those who live in busy city areas and want to make their homes more peaceful and quiet.

Installing double glazed units in your house will significantly increase its value, making it a great investment in case you would like to sell or rent your property in the future.

Due to the additional layer of durable glass, double glazing is a good way to protect your home from burglars.

Double glazed units are produced with more material than regular doors and windows, thus the initial cost is higher. However, the amount of money you can save in a long run makes it a worthwhile investment.

While keeping the heat inside is what makes the units so functional during cold seasons, it can be a downside during summer. Adding reflective or tinted glass can fix the problem, however, it may also add to the overall cost.

If the seal of the double glazed unit is broken, condensation appears between the glass panes. In order to fix the problem, most companies recommend investing in a replacement. However, the cost to replace a double glazed window can increase if you are changing designs or frames i.e., a like-for-like swap will be far cheaper.

Double glazed doors and windows have a fairly modern look. The aesthetics of older houses don’t make the best fit with double glazing. However, there are double glazing companies that specialise in producing double glazed units for older properties.

Double glazed units consist of two layers of glass that create a barrier, which reduces heat loss and noise heard from the outside. The layers are separated by a spacer bar and the gap between them is usually 9 to 12 mm wide. The trapped air between the panes doesn’t have enough space to circulate and acts as an insulator, therefore the transmission of heat is slowed down. The process is called a convection and gives double glazing its insulating properties.

Moreover, the units can be either transparent, tinted or covered with reflective film. The two latter options are useful for controlling how much UV light is allowed to enter your home.

There are six main components of double glazed products:

Nowadays, many companies offer a wide range of materials and glass types so that you can customise the windows and doors in regards to your needs. You can choose from different types of frames, glass, shapes and spacer bars. 

We strive to engage more people in sustainability. Therefore, we want you to save time and money finding the best renewable energy solutions for your home.

Are you interested in buying double glazed doors and windows for your home? Don’t waste time on time-consuming research, simply fill in the contact form at the top of this page. We will provide you with up to 4 quotes from reliable suppliers in your area for free, without any further obligations.