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Endorsed by Which? Trusted Traders

Advanced Glazing Systems Ltd

Profile thumb ags logo

326 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

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

326 reviews
Customer Service
Sort by
Renewal of double glazing
Customer Service
AGS have just renewed all our windows and doors apart from the front door which we’d had done a couple of years ago. We would definitely recommend AGS. Andy’s quote was straightforward with no messing about and didn’t take hours like some companies. Once we’d accepted the quote the surveyor came to measure up, everything was ordered and we very quickly had an installation date. The installation team arrived early on the planned day and worked hard. The job was finished in three days as promised at the beginning even though three panes of glass had broken at the depot - these were ordered and arrived in time to be installed without the job being delayed. The team were friendly, worked hard and cleared up very well each day. We were impressed with the attention to detail given to the job.
Sally in Greater London Posted on 20/04/2022 , work completed 13/04/2022
Excellent workmanship and customer service from AGS (new windows in a ground floor flat)
Customer Service
AGS were excellent from start to finish. My partner and I decided we needed to replace all of the windows (4 windows and a large 3 section bay window) in our flat due to the poor heat and noise insulation. I spoke to John over the phone on a number of occasions and his knowledge and expertise were fantastic. The quote was somewhat pricier than some other like-for-like quotes I had gathered, but with such a large bay window I wanted to ensure the work would be carried out to a very high standard. John answered all of my queries and made me feel confident that AGS were the right people for the job. The installation was completed in a single day, and after completion, it's apparent that you get what you pay for. My partner and I are extremely happy with the quality of the windows and the attention to detail in the finishing that the installers had. We had one minor hiccup where the glass for our bathroom wasn't frosted as requested when the survey was carried out, but this was addressed and sorted immediately by John and Julie. After the new glass had been ordered an installer returned to the property in 2 weeks and fitted it in about 10 minutes. Everyone that I communicated with - John, Peter, Julie, Simone and Ella - were very friendly, polite and professional; providing a fantastic level of customer service that you hope for when spending quite a significant amount of money on a fairly large home improvement. I would highly recommend Advanced Glazing Systems.
Customer in Greater London Posted on 08/04/2022 , work completed 21/03/2022
Superb job - highly recommend!
Customer Service
I, like many, googled replacement windows: AGS came up and even though it meant they had to travel further than maybe they would normally, there was no quibble. Andy was fantastic - especially when baby brain couldn’t compute the prices; Ella replied to emails quickly and helpfully and the chaos that came to fit the windows worked well as a team and were so professional. They even showed me how to open the windows for cleaning (I won’t be doing that - we have a man) - all in all, an excellent trader from start to finish. And the price was good too!
Customer in Cambridgeshire Posted on 01/04/2022 , work completed 28/03/2022
Kitchen door and side windows with new double glazed unit
AGS fitted about 8 years ago 3 double glazed windows in my flat and as I recently wanted to replace a kitchen door and side windows with new double glazed unit in my house, I remembered the quality of the work that had been done in my flat and thought I would contact AGS for a quote. The entire process was truly seamless with a market value quotation and very good quality double glazing materials. The fitting was excellent and we are all very happy with the new unit at home. This is a team of people ( a family business) that work extremely well in terms of communication, punctuality, competence and experience. You will not be disappointed if you book AGS to improve your residence.
Customer in Greater London Posted on 22/03/2022 (Reviewer did not use service)
Excellent experience
Customer Service
I've had to deal with a lot of companies in the last few months and AGS have been one of the best. A terrific experience from the beginning to the end. I would recommend them very much if you need a new front door.
Customer in Greater London Posted on 11/02/2022 , work completed 11/02/2022
Wish every job ran this smoothly!
Customer Service
From start to finish everything was as promised. Survivor came on time, fitters came on time, job finished. The workmen were polite, tidy and got on with the work. John was an excellent initial contact, answering my questions immediately. It was a pleasure doing business with this company
Customer in Greater London Posted on 27/01/2022 , work completed 25/01/2022
Fitting New Front Door
Customer Service
I was very pleased with the tradesman named Steve from AGS who fitted my new front door, he did an excellent job!
Customer in Essex Posted on 25/01/2022 , work completed 19/01/2022
Bay Windows Front Door
Customer Service
New Bay windows and Endurance Front door fitted by AGS. The fitters have been amazing, they were very helpful in selecting and recommending ideas. The surveyor was brilliant, worked everything out perfectly. Could not find a fault if I tried. Everything finished to a high standard. They have totally transformed the House . Flush sash windows in white woodgrain with Heritage sills. Definitely worth the extra money, they look like the original windows that would have been fitted when house was built. If everyone had these done the road would look fantastic. So pleased am getting rest of house done. Well done AGS.
Dean in Greater London Posted on 20/01/2022 , work completed 12/01/2022
The trader replied (on 24/01/2022)
Thank you for your review.
Highly recommended
Customer Service
Used Advanced Glazing for roof light and kitchen window replacement. Andy and his team were top notch from start to finish. We have used them twice now and also recommended them to friends and family. Always on time, great attention to detail and superb finish. We are chuffed to bits and would not hesitate to recommend.
Customer in Essex Posted on 15/10/2021 , work completed 08/10/2021
The trader replied (on 24/01/2022)
Thank you for your review.
Great quality
Customer Service
We are delighted with the quality of our completed conservatory. The fitters and builders were always on time, flexible and professional throughout.
Customer in Greater London Posted on 24/07/2021 , work completed 09/07/2021
The trader replied (on 04/10/2021)
Thank you for your kind review.