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Last updated: 09 June 2021

Best Double Glazing Companies

Top 5 Double Glazing Companies in the UK

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 nationwide companies. There are many installers and choosing the one that fits you best can be quite a task.

To help you in the process, Greenmatch has put together a list of 5 national double glazing companies and reviewed them based on the following metrics:

  • Trustpilot Rating
  • Special offers
  • Financial assistance
  • Availability of warranty or guarantee
  • Area of operations
  • Latest customer reviews
  • Covid updates from the company

Reviewing 5 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 You Invest in Double Glazing?

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

Double glazing and uPVC windows decrease disruptive noises from outside and create 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

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, and works can continue in all tiers under the current restrictions.

Review of the Top 5 National Double Glazing Suppliers

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 reviewed a few national suppliers below that offer high-quality double glazing products. 

Comparison of Top 5 Double Glazing Companies
Comparing Trustpilot rating
(out of 5)
Special Offers Finance Options Warranty/ Guarantee Area of Operations


Upto 30% lower prices 3 options of finance available 10 years   Across England and Wales


Multi-buy savings  Loan options available  10 years  England, Scotland and Wales 


Upto £250 off upon online orders  Credit available with a deposit of £199  10 years  England, Scotland and Wales 
CR Smith


3 years 0% interest free credit  No deposit required  10 years  Primarily in Scotland 
First Home Improvements


Upto 30% off on whole product range  £100 deposit, credit available  12 years Across counties of England 

1. Safestyle UK


Safestyle UK has been installing windows and doors in Wales and England for over 20 years. It offers you a quote online with just one form to fill in. They are one of the few companies to give you a quote on the same day and not keep the customers waiting. 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.

Covid Update: Safestyle provides adequate information on their website about safety precautions taken during Covid. They have two safety guides for sales appointments and installations respectively. Customers are assured that all safety precautions are taken at the meeting points. Their safety guides are given to the customers well in advance so they know what to expect.

2. Everest


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.

Covid Update: With the new Tier restrictions that came into effect on 2nd December 2020, the company said that they will continue survey appointments and installations with the exception of Tier 4 in Scotland. They update their page with the latest information to keep their customers well ensured of their safety.

3. Anglian


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.

Covid Update: The company has well adapted to the new normal during Covid times. They now offer both Remote design and In Home consultation, since their showrooms are closed during this time.

4. CR Smith

CR Smith

CR Smith has been part of Scotland's business community for a century. The company provides multiple options for windows and doors for your home or a conservatory. They have a special offer on new windows and continuously update their website with new offers.

With CR Smith you can expect to get an interest free credit for upto 3 years and with no deposit required. They seem to have one of the best customer service with the highest Trustpilot rating.

Covid Update: During Covid, their show centres are open only by appointment. They have also accommodated different ways of offering sales support, both online and offline. Their Covid safety guide tells you that CR Smith has prioritized customer safety by giving detailed illustrations on what customers can expect when dealing with the company and their servicemen.

5. First Home Improvements

First Home Improvements

First Home Improvements have an extensive choice of double glazed and uPVC windows and doors. They also have products available for conservatories and orangeries. They display testimonials from their customers that show their high level of customer satisfaction practices.

They also take pride in providing a 12-year warranty across their range of windows. They have been in the market for over 45 years and continue to do so during Covid times.

Covid Update: The company states that it has reviewed its activities and procedures to comply with the government restrictions during Covid. Although their retail showrooms have remained temporarily closed, they continue business activities of surveying, installation and maintenance.

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.

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

How to Choose the Right Installer

Once you’ve decided on your home needs you’ll have to look at various double glazed windows manufacturers. It's essential that you consult professionals and compare various installers and choose the company that can comply with all your requirements and gives you the best double glazing prices. Listed below are 4 tips while choosing an installer:

  • Consult and seek help from professionals while fitting double glazing
  • Make sure your supplier is DGCOS, Certass or Fensa certified
  • Get multiple quotes and compare deals and prices
  • Choose the installer that meets all your requirements

Double Glazing Installer

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 above.

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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Ana Kukoska
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