Best Double Glazing Companies for Windows & Doors (Complete Guide 2020)

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Last updated: 30 October 2020

An Introduction to the Double Glazing Industry

Double glazing is the process of binding two sheets of glass together to create a small gap of air in between which creates a barrier of sorts.

Double glazed windows and doors have actually been around since the 1950s. However double glazing companies only started to take off during the 1980s. Since then the industry has been growing, creating more and more national double glazing companies.

If you’d like to find out more about double glazing companies that match your needs and budget, be sure to fill in the form at the top of the page. It only takes a minute and Greenmatch will provide you with up to 4 free quotes from qualified suppliers. Our services are free and there are no binding obligations. 

Double Glazing Companies

Why Should I Invest in Double Glazing?

If you’d like to make your home quieter and warmer, you should definitely consider installing double glazing.

Double glazing decreases disruptive noises from outside and creates an extra barrier to heat loss. This way you’ll not only make financial savings on your energy bill but also reduce your carbon footprint significantly. 

Additionally, the double glazing method is very strong and durable, which makes it harder for intruders to enter, offering extra security to you and your family.

New Green Homes Grant 2020

In July, the government announced the new Green Homes Grant, which provides homeowners and landlords with £5,000 - £10,000 vouchers for energy-saving renovations.

Double glazing is included under the secondary measures of the grant.

Applications are now open. Read our guide about the Green Homes Grant for full details and to help prepare your application.

Note: the Green Homes Grant is only available in England.

The Best Double Glazing Companies in the UK

The double glazing industry is a competitive one and we know that a lot of double glazing companies can be overwhelming. To save you time and energy we have listed a few double glazing companies below that you’ll definitely come across along the way.

Choosing a double glazing manufacturer can have a big impact on the quality of your double glazed units. We listed a few national suppliers below that offer high-quality double glazing products. 

Double Glazing Manufacturer


REHAU was found in the eponymous city in Bavaria in 1948. Today, REHAU is represented in over 50 countries making it one of the biggest double glazing companies in the world. Once you decided to purchase their high-quality uPVC windows and doors, REHAU will suggest verified installers in your area on their website and how you can get in touch with them. 


Crittal is one of the world's leading double glazing companies for steel windows. They specialise in the production of windows for historic and refurbished buildings, mainly replacing windows that are architecturally valuable. Their products are of very high quality as they go through an extensive process and can also be also fitted to newer homes due to their versatility.


Eurocell is a national supplier and distributor of uPVC double glazed doors and uPVC windows. Like most double glazing companies They additionally offer a variety of conservatories as well as roofline products. After your purchase, you can either take advantage of their 24-hour free delivery service or pick it up from one of their 140+ UK branches.


WERU is a German double glazing company. They offer aluminium and uPVC double glazing in the UK as well as triple glazed units. If you would like to get a better idea of what their products look like you have the option to visit their showroom in Blackpool.

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How to Choose the Right Installer

Once you’ve decided on double glazing products you’ll have to decide on a double glazing installer.

Double Glazing Fitter Tips

Everest Ltd.

Everest Ltd. has been in business for over 50 years and with a customer base of more than 2 million people, they’re one of the most experienced and biggest double glazing companies in the UK.

Their expertise and high-quality products come at a higher cost. Hence, Everest double glazing quotes will probably not be the cheapest offer on the market. However, as they price match with quotes from other double glazing companies it would be worth it to keep an eye on deals from other installers.

Everest Ltd., like most double glazing companies, provides you with a quote only after one of their installers has inspected your house. Conveniently, you’re able to book an appointment for free online. This particular company additionally offers you a lifetime guarantee as well as a finance plan with either Barclays Partner Finance or BNP Paribas Personal Finance.


Anglian Ltd was established in 1966 and is alongside Everest on of the biggest double glazing companies in the UK. They’re valued by their customers because of their exceptional quality and competitive prices.

Anglian Ltd offers a 10-year guarantee on uPVC, aluminium or wooden doors, windows and conservatories. Additionally, they price match quotes for uPVC products within 7 days and like most double glazing companies give you a quote after one of their team members has inspected your home.

With Anglian, you’re given the option to finance your double glazing units with an Anglian Gold Account. This plan is very popular because you will be receiving a further reduction on the cash price.

Safestyle UK

Safestyle UK has been installing windows and doors in Wales and England for over 20 years. Unlike double glazing companies like Anglian and Everest Safestyle UK offers you a quote online with just one form to fill in.

All of their products are covered by a 10-year guarantee and they additionally offer you price matching for like-for-like quotes from other double glazing companies. Safestyle UK, also gives you the option to choose a finance plan through Barclays Partner Finance. Their most appealing Finance options are the 24-months interest-free plan and the 12 months buy now pay later plan.

Zenith Home

Zenith UK has been in business for over 40 years now. They offer uPVC double glazed windows and doors. You’ll receive a quote from Zenith after one of their employees has inspected your home and a 10-year warranty on all products if you decide to purchase.

Zenith price matches with other double glazing companies within 7 days and offers a wide range of finance plans.

Double Glazing Company Bodies

Local Double Glazing Installers and Manufacturers

Keep in mind that the double glazing companies listed above are the biggest installers and manufacturers nationwide.

There are many other smaller local double glazing companies that offer you the same services. If you prefer to choose a local installer or manufacturer make sure that they’re certified by one of the schemes listed below.

Company Bodies—How to Protect Your Rights

Double glazing company bodies are faithful companions along your decision-making process. They verify double glazing companies to make sure that your units are installed and fitted properly.

DGCOS: or Double Glazing and Conservatory Ombudsman Scheme is an organisation that protects consumer’s rights. Their service is free and includes mediation to fully resolve issues with double glazing companies, a consumer advice line, guarantees and insurances and more.

FENSA: which stands for Fenestration Self-Assessment Scheme is a scheme implemented by the Glass and Glazing Federation (GGF). Like the DGCOS, FENSA also protects your rights by verifying double glazing companies, making sure that they comply with the Building Regulations.

Certass: like FENSA Certass is a UKAS accredited certification body. For consumers, Certass offers the same services as FENSA but additionally provides mediation support like DGCOS.

Conclusively, all of the double glazing companies listed above do their very best at protecting consumer’s rights. Hence, it’s important to check if your installer is verified by one of these company bodies.

Find the Best Double Glazing Companies in the UK

If you’re overwhelmed by the huge variety of double glazing companies in the industry we’re here to help.

If you’re interested in finding double glazing costs and double glazing companies that fit your needs and wants best, fill in our short 1-minute form at the top of this page and get up to 4 quotes from trusted suppliers. Our services are free and there are no further obligations involved.

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Written by Ana Kukoska Content Coordinator Ana is a Content Coordinator at GreenMatch. With a background in journalism and digital marketing, she has several years of experience in research, analysis, and content creation. On top of this, her focus lies on SEO and digital PR in the following areas: geen sector, sustainability, business, innovation, and more. She and her content team have been published in reputable sites like The Odyssey Online, My News Desk, Zero Waste Home and more
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