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Trusted Traders

Advanced Glazing Systems Ltd

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305 Reviews

Organisations and Awards

Sep 2019


AGS are experts in all areas of UPVC and Aluminium Home Improvements and we want to help you create your dream home.

We are much more than the average double glazing Company and we are confident that you will notice a real difference between AGS and our competitors.

We let our products speak for themselves and our friendly professional staff are more concerned with you receiving the best possible customer service and a high quality product that is right for your home.

AGS are registered with Fensa, The Glazing Ombudsman and the Glass and Glazing Federation, for complete peace of mind that you are dealing with a Company that has your interests at heart.

AGS supply and fit the following product range:


To discuss our product range and services further please feel free to contact us.

Andy Barnett

What we do

  • Double glazing

    • Double glazing installation
    • Double glazing repairs
    • Double glazing suppliers
  • Glaziers

    • Double glazing installation
    • Double glazing repair
    • Sash windows
    • Stained glass
    • Replacement window services and repairs
    • Aluminium Windows
    • Double glazed units
    • Triple Glazing
    • UPVC Windows
    • Window consultants
  • Conservatories

    • Conservatory repairs
    • Conservatory maintenance
    • Conservatory Roof replacement
    • Sun Lounge
  • Doors

    • Bi-fold doors
    • Composite doors
    • Front door
    • French doors
    • Patio doors
    • ​Aluminium doors
    • Orangeries
    • UPVC doors
  • Roofers

    • Guttering, fascias and soffits
    • Conservatory roof conversions
    • Tiled conservatory roofs
  • More Services

    • facias

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

305 reviews
Customer Service
Sort by
Replacement doors and windows
Customer Service
AGS replaced my front and back external doors(2) and windows front and back downstairs and upstairs(4). Prompt informative survey without the hard sell of others and they gave me time to consider their quote v others, who were not so patient. Not only was their product rated highly elsewhere but their price was best too. No brainer! Installation within 3 weeks. They turned up on time, hardly stopped working for 3 days and left no mess. I am delighted by my doors and windows and thoroughly recommend them. I want a conservatory now and they will certainly be invited to quote.
Customer in Thurrock Posted on 13/11/2020 , work completed 25/10/2019
Exceptional Customer Care
Customer Service
Having used AGS ltd 7 years ago to instal all our windows, french doors and bifold, we were impressed then. One of the bifold window smashed, I contacted AGS as we have a 10 year guarantee. The start of the phonecall having given my name, was "I remember you Mrs L..." I thought nice, but ok good sales pitch, to which they rattled off our names address and phone numbers from the system! We have a common surname. We aren't even local to the company! I was told glazing wasn't covered by insurance but was given a quote within 20 minutes and installation date shortly afterwards. There would have been a delay of up to 8 weeks due to Covid, I explained we are due to move and needed this replaced asap. AGS asked the glaziers for a big favour and we only waited 3 weeks. Window was fitted very swiftly on the agreed date and time. Locking mechanism adjusted by a very polite tradesman. Our only regret, we are moving to a new build and personally will not be requiring their services, but 100% recommend them
Customer in Hertfordshire Posted on 27/10/2020 , work completed 20/10/2020
Great from start to finish
Customer Service
AGS fitted new windows and back door with a glass mounted cat flap. The service was great, they answered all my queries and questions. The installation was quick and efficient and I am absolutely delighted with the end result. All the staff were very friendly and helpful and the after service care was outstanding. I had one minor query which was sorted immediately. I have already recommended them to a friend. Couldn't be happier with the whole experience.
Customer in Greater London Posted on 08/10/2020 , work completed 23/09/2020
My review
Customer Service
Prompt & quality service
Which? Trusted Traders Consumer Posted on 09/06/2020 , work completed 05/06/2020
Good work tidy and friendly
Customer Service
Very pleased with both the window and doors, work done in good time, making good done very well on old brickwork outside,very neat job left site very clean and tidy.
Customer in Greater London Posted on 26/05/2020 , work completed 26/05/2020
Highly recommended (Replacement gutters and windows)
Customer Service
We had replacement gutters, fascia and windows fitted for our 1920's semi-detached house which has bay windows. The contract was part fulfilled prior to the COVID19 lock-down but some of the work had to wait a few weeks. AGS kept us up-to-date through the process. All work has now been completed to a high standard. We're very happy customers. Dealing with AGS has been a pleasure throughout the process. From initial visit (no hard sales pitch and their quote was quite competitive); to survey/measurements (where they proactively sought to resolve issues) to arranging scaffolding (being flexible with the dates )... the office were very efficient. For the fitting...One team was used for the gutters/fascia and another for the windows. Both teams worked efficiently and were very tidy - keen to make everything "just right". We highly recommend AGS.
Customer in Greater London Posted on 19/05/2020 , work completed 07/05/2020
Quality double glazing
Customer Service
2 large windows and door installed. This is the second time I have chosen AGS for double glazing. Their quotes are competitive and their Installation team are professional, efficient, polite and tidy I am satisfied with the results and would recommend them.
Customer in Greater London Posted on 29/03/2020 , work completed 13/03/2020
New Kitchen Door & Window
Customer Service
After using AGS in the past for windows and front door 4 years ago, they were the obvious choice when we were doing a kitchen revamp and wanted a back door and a window put in. The first point of contact was John and he was very helpful and obliging and said they would fit us in within our time scale. Darren & Gavin the fitters arrived on Saturday morning to cut out the brickwork and fit the new door and window. Both guys where very professional, clean and tidy in their work. New door and window looks a treat, very happy.
Customer in Hertfordshire Posted on 03/03/2020 , work completed 29/02/2020
Excellent company to work with
Customer Service
Really pleased with our new windows from Advanced Glazing, they look incredible in situ and really change the whole vibe at the back of the house. Inside is already noticeably warmer, quieter and lighter! The decorative architrave around the windows is stunning and I love the colour outside! John really understood our brief and delivered everything I was hoping for... and for such a good price. The fitting team were absolutely lovely and really did a fine job - they were a pleasure to have in the house. All of the team were a pleasure to deal with from start to finish - I will definitely be using them again when I have the money to do the front of the house!
Customer in Greater London Posted on 20/02/2020 , work completed 14/01/2020
Great work
Customer Service
We have used AGS previously, replacement French doors and a new external door, so we chose to use them again and once again they delivered a great service, from the my initial phone call to completion of the work. Highly recommended, we will be using them again to complete our work at a later date.
Customer in Greater London Posted on 21/01/2020 , work completed 17/01/2020