Whilst many people have great success with local installers, getting windows, doors or conservatories from one of the more established companies can be a solid bet.

Not sure where to start? We’ve put together a list of some of the best double glazing companies in the UK.

Making decisions about new windows, doors & conservatories for your home can be a real headache, so checking out what the more established players are offering can be a good place to start.

As with most industries, those who are at the ‘top of their tree’ are there for good reason. 

A long track record of success, excellent after-sales support and a wide range of options.

In terms of choice, products, service and aftercare, the best double glazing companies in the UK will be able to provide you with all the answers you seek.

A quick quote from one or two of these will give you, at the very least, a good idea of what you can do with your budget.

So who are these companies?

How do you decide the best window fitters?

Firstly, we should clarify that we have no association with any of these names and we don’t get paid anything for recommending them!

We simply took our personal knowledge of the UK market and matched it up with reviews and ratings on sites like Trustpilot.

The result: 8 suggestions of top-recommended UK double glazing companies for you to connect with…

1. Anglian

Established by George Williams in 1966, Anglian was born in Norwich but its first showroom appeared in Ipswich three years later. 

George was proud of his British-made products and more than 50 years on, Anglian showrooms are a nationwide enterprise.

Anglian windows are all B, A or A+ rated and come with a 10 year guarantee on all frames and a 25 year guarantee on sealed units.  

The Company offer a wide range of styles – aluminium, timber and UPVc frames along with double, secondary or triple glazing.

Their made-in-Britain branding, energy efficiency products and huge variety of options make them a market leader.

Anglian have earned themselves a 4-star (80%) rating on Trustpilot. 

Anglian customer review: “Completed ahead of schedule, very efficient and highly recommended.”

2. Safestyle

Safestyle Windows were only established in 1992 with a modest £2,000 investment.

In 2005, they installed more than £100 million worth of windows and doors and became the number 1 market leader in UPVc.

Safestyle has its headquarters based in Bradford, W. Yorkshire but  boasts over 40 branches throughout England and Wales.  

Unlike some of the other market leaders, Safestyle focus purely on UPVc windows and doors.  This has allowed them to concentrate on design and they are well-known for quality tilt and turn windows and sliding sash.

Another feather in their cap is the Eco Diamond windows (endorsed by Energy Savings Trust) for the eco conscious customers among us.

The additional promise on price and renowned effort to recycle around 95% of the old windows they remove, makes them a very popular choice with homeowners.

Safestyle have earned themselves a 4 star rating (86%) on Trustpilot.

Customer review: “Happy with the product, service and installation. Good customer service, provided us with all the information needed, highly recommended.”

3. Everest

Everest Windows began in 1965 in the county of Essex, as Home Insulation Ltd.  

Their founder, David Kingsley had a vision to provide new glazing to homes that were previously without insulation.  Initially, they provided aluminium secondary glazing and were branded during the next decade with the much-remembered, ‘fit the best’ slogan.  

Going from strength to strength the company launched trailblazer products such as the sliding patio door.  This revolutionised home design.

Today, Everest continue to provide customers throughout the UK ( and Jersey) with up-to-date energy rated windows which carry one of the best warranty periods.  Windows come with a 10 year guarantee and a further 30 years on timber versions.  

Everest proudly offer warranty against condensation on certain windows and guarantee against flaking and discolouration on UPVc.

Their double glazed windows are rated A and A+ whilst their triple glazing is accompanied by an A++ rating.

With five different styles of windows, Everest still remain an appealing and favoured supplier of double glazing. 

Everest have earned themselves a 4-star rating (86%) on Trustpilot.

Everest customer review:“Excellent service from start to finish, couldn’t be happier with the products.”

4. A&B Glass Group

This company are renowned for their domestic projects as well as commercial ones.  Covering contemporary and traditional style windows, A&B are deserved of a place in the chart toppers of double glazing.  

Additionally, A&B manufacture UPVc windows from their two plants, providing quality service.

A&B Glass have earned a 3.9-star rating on Trustpilot.

A&B customer review: “Perfection does not exist but A&B is close to this point…”

5. First Home Improvements

First Home Improvements initially started up in the 1970’s.  Offering exclusive and innovative products, they pride themselves on using traditional, hand-crafted methods.

Covering more than ten counties throughout the UK, this company will provide designers, surveyors, installers and builders to ensure a quality service from start to finish.

First Home Improvements have been supplying“A” rated energy efficient products since 2008, on a parallel with some of their biggest competitors within the industry.

First home Improvements have earned a 4.1 on Trustpilot.

FHI customer review: “From the initial quote to the follow up discussion and eventually the fitting, we had no problems and enjoyed very good customer service along the way, with no issues.”

6. Exclusive Double Glazing

A family run business in Alresford, Hampshire, Exclusive Double glazing have over 30 years of industry specialism.  

Exclusive Double Glazing supply all types of windows and doors in double or triple glazing.  They delight in offering a  niche and personalised service yet don’t shy away from a broad selection offered by the bigger companies.

Exclusive Double Glazing have earned a 3.8 rating on Trustpilot.

Exclusive customer review: “Gave efficient services, top-notched and work was completed to its high standard.”

7. CR Smith

Householders in Scotland will be familiar with the company name CR Smith for all their double glazing needs.  

Their reputation precedes them not least through tv advertising and premiership football sponsorship.  

CR Smith manufacture as well as supply so have a firm hold on the trade in Scotland and have been in existence for over 100 years.

CR Smith have earned a 4.9 on Trustpilot.

CR Smith customer review: “Very satisfied with job. All round good service.”

8. Your local company

OK, so this isn’t a specific company, but when listing the top window fitters in the UK, we cannot forget the many local companies, all over the country. 

These smaller enterprises will be content to operate on a small scale and most will purchase their products from large suppliers in the UK.  

There are clearly advantages for such companies to remain small, relying on local, word-of-mouth reputation. 

Their impetus for success will more often than not, be about producing good work in their own community.  

For the customer, this means you can see examples of projects in your area whilst knowing you are offering support to a local business.

To sum up…

Ultimately, the decision is yours but it is worth bearing in mind that the best double glazing companies will most likely have longevity and therefore, knowledge of their trade.  

Initially, look for experts in their field who are able to advise you and answer your questions.  Companies who have made huge investments in gaining a good reputation will want to continue to offer a great service in terms of ideas and craftsmanship.

When choosing a glazing company to carry out work, always ensure you check their credentials are up to date.  Do your research and get a feel for the quality of service from customer reviews.

You work hard for your money – make sure you get the best it can buy!

Matt James
Matt James

Hi, Matt here! I started out almost 20 years ago as a teenager working in the family business fitting doors, windows and conservatories. I now run this website to share the best tips and advice for anyone looking to get a good deal on double glazing.