Double Glazing Windows Guide

Double glazed windows will reduce your energy bills, increase your home’s value, make your property more secure and reduce noise pollution.

The average family home will save over £100 a year by installing double glazed windows.

You can receive quotes from trusted double glazing companies using the form above. You can also read our guide to double glazed windows below.

In this guide:



How much could I save with double glazed windows?

Installing double glazing can significantly reduce your household’s energy bills.

On average, installing double glazing into a home that is currently fitted entirely with single glazed windows and has an A energy rating, can save as much as £120 in a semi-detached house, £175 in a detached house and £65 in a flat, per year.

The Energy Saving Trust says that a typical gas-heated, single-glazed house could save the following by installing double glazing:

Double Glazing Savings

These likely savings are before you even factor in likely energy price increases. Energy prices have increased by over £300 on average over the last three years and further rises seem inevitable.

Indeed, recent reports have warned that energy bills could rise by almost 50% over the next six years. Installing energy efficient double glazing will help protect you from rising energy bills.


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How much will it cost?

The cost of double glazing differs from house to house, with style, size and number of windows having an impact on the price you pay. However, on average a single uPVC window can cost between £300 and £400, and fitting standard uPVC windows throughout a typical three bedroom house can cost between £3,000 and £5,000.

Size of property
Average cost of double glazing
2 bed semi-detached
£2,000 - £3,500
3 bed semi-detached
£3,000 - £5,000
4 bed detached
£4,000 - 6,500


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What are the benefits?

Thermal Camera Of House

The thermal camera image of two houses shows the impact double glazing makes on preventing heat loss through windows. Double glazing helps retain more of the heat in your home and therefore reduces your energy costs by making your property more energy efficient.

An average semi-detached house can reduce their energy usage by 18% through installing double glazing, which will help significantly reduce energy bills and lower your carbon footprint.

Double glazing also helps soundproof your property and keeps the noise out; this is especially important if your home is close to a busy road.

They also provide added security as they are harder to break than single glazed windows. Burglars look for easy targets so are unlikely to take on double glazing.




Are there any disadvantages?

The only real disadvantage of double glazing is that they are hard to repair due to the airtight space between the two panes. If the seal is broken then condensation can form between the two paness.

The good news is that double glazing should last for at least 20 years and they will come with a warranty if you choose a reputable installer.



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What frames should I choose?

There is a range of different frames you can choose; the frames that are best suited to your home will depend on the type of building and your personal tastes. The main types of frames available include:

uPVC frames are the most common in the UK. They have a long lifespan and provide a modern look. uPVC frames are very versatile meaning they can be made in a wide range of shapes, sizes and colours. They don’t require painting and are virtually maintenance free.

Wooden frames can be a better option for more traditional homes. They are good insulators so will keep your home warm. The frames will need painting, but this allows you to choose your own colour. They do however require a fair bit of maintenance.

Composite frames are a new innovative system that are designed to replicate 19th Century timber windows.

Aluminium or steel frames are strong but lightweight. They are virtually maintenance free and can be painted any colour you wish.


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Can I get free double glazed windows?

The Green Deal was set up by the Government to help those who are looking to improve their home and anyone can apply.

The scheme works by giving loans to people who are looking to cut energy bills through upgrading their windows; it is then paid off using the money you save on your energy bills.

Repayments to the provider of your double glazing is done over time, through your energy bills, and tend to take care of themselves. Additionally, your repayments won’t exceed any savings you are making on your energy bills and therefore the repayments are made without any further cost than you are used to.

That said, there are some requirements to qualify for the deal; one being that you need to have an assessment of your property which costs about £120.

It’s also important to note that the loan is attached to your home, not you. That means that if you move, the next owner takes on the loan automatically. This could cause complications when selling the home.

It has also become harder to find reputable companies who will offer a Green Deal package due to concerns about the scheme. Indeed many, including MPs, have labelled the Green Deal scheme a “disappointing failure” due to lack of take up and availability.

If you have the money up front to afford the double glazing, it can often be better just to pay for the costs up front.


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How does double glazing work?

Double glazed windows consist of two panes of glass with a layer of gas sealed between them. This creates nearly twice the insulation as single glazing.

Energy-efficient glazing refers to double and triple glazed windows that are designed to increase the efficiency of your home and in turn reduce the amount of energy required to heat your home.

Energy-efficient glazing uses a coated glass to reduce the amount of heat escaping from your home. This type of glass works as an effective thermal insulator and improves the energy efficiency of your home, which leads to a reduction in your energy bills.


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Does double glazing affect my house price?

Installing double glazing should increase the value of your property. Indeed, having single glazing or ageing double glazed windows was named by RightMove as one of the top factors that negatively affect house prices.

If you are installing double glazing and considering moving in the next 20 years, you should remember that the style and quality you opt for will impact how desirable potential buyers see your property. Try to choose a style that is inkeeping with your property and the homes on your street.


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Should I go for triple glazing?

Triple glazing has an extra pane of glass compared to double glazing, and has been designed to provide even more efficiency and noise prevention than single or double glazed windows.

Though there are small benefits of choosing triple glazing over double glazing, the payback is similar and there is no considerable difference in terms of reducing energy bills and cost.


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Installation information and tips

In this section:

Energy efficient window rating labels

How long does it take to install?

Do I need planning permission

What to look for when choosing a double glazing company

Top tips when dealing with a double glazing company

How do I maintain double glazing?



Energy efficient window rating labels

The BFRC scheme is the system used in the UK to rate the energy efficiency of windows. This will make it clear to you how energy efficient the windows you are thinking of using are. The ratings scale from A to G and use a traffic light guide to make it easier to understand.


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How long does it take to install?

The time required to install double glazing differs from house to house, and the exact time is dependent on the size of the house and the style of windows chosen. Though, on average, it takes three to five days to fit an entire house with new double glazed windows.


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Do I need planning permission?

You do not need planning permission to replace or add new windows to your home unless you live in a listed building.


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What to look for when choosing a double glazing company

When choosing a double glazing company it is important to choose one that is not only local to you, but also has a good track record with past window installations. Look for a company that can show you their previous work and designs.

Additionally, it is important to choose a double glazing company with a team that is professional and knowledgeable in all areas of window installations; choosing to buy double glazing is a big decision so it is important to have an expert on hand to help and guide you through the process, offering their expert opinion and answering questions throughout.

By filling out the form at the top of this page, you will receive no obligation quotes from local, trusted installers with a proven track record of working with our customers.


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Top tips when dealing with a double glazing company

When looking to upgrade your home and install double glazed windows, it is important to get quotes from more than one company so you can make a comparison. Additionally, using a local company is beneficial as you are able to meet them face to face and ask any questions you may have.

Before you approach a double glazing company, have a rough idea of what you require; this will allow them to give you a tailored and specific quote from the start and will make the whole process quicker.

Most importantly, when choosing a double glazing company ensure you see examples of their past installations so you can have an idea of the type of work they do and whether it is right for you and your home.

The Eco Experts make choosing an installer easy and safe; simply fill out the short form at the top of the page to receive a number of quotes from local installers who have a proven track record.


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How do I maintain double glazing?

Double glazing should be easy to maintain, but be sure to follow these top tips:

Keep your home well ventilated to avoid the buildup of condensation on the inside of the windows. If condensation starts to appear between the panes of glass it may well mean that the unit has a fault; you should contact the installer immediately if this occurs.

You should clean your windows regularly, ensuring the frames are clear of any dust, dirt or dead insects. A vacuum cleaner will be the best thing to use for this. To clean the actual windows, a vinegar and water solution will be all you need to keep them sparkly clean.



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