Endorsed by Which?

Advanced Glazing Systems Ltd

4.9

369 Reviews

Opening Hours
Today -
  • Monday 08:00–17:00
  • Tuesday 08:00–17:00
  • Wednesday 08:00–17:00
  • Thursday 08:00–17:00
  • Friday 08:00–17:00
  • Saturday - Closed
  • Sunday - Closed

Why you can trust this trader

After undergoing rigorous assessment to become endorsed, every Which? Trusted Trader agrees to our Code of Conduct. This gives consumers the reassurance that they have the best possible protection and adds an extra layer of security to ensure best practices and procedures are followed. Which? fully investigates any breaches and will take any necessary action to ensure consumer protection.

Organisations and Awards

Sep 2019

About

AGS is a family run business specialising in all areas of UPVC and Aluminium Home Improvements.

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:

UPVC WINDOWS & DOORS - ENERGY RATED 'A'
ALUMINIUM WINDOWS & DOORS - ENERGY RATED 'A'
UPVC SLIDING SASH WINDOWS - ENERGY RATED 'A'
COMPOSITE DOORS
CONSERVATORIES
BIFOLD AND SLIDING DOORS

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.

4.9
369 reviews
Customer Service
5.0
Quality
4.9
Value
4.8
Sort by
New front windows and door
Customer Service
Quality
Value
From the initial visit through to completion of the work every aspect was handled in a very professional manner. The team on the day were excellent; from timekeeping to tidying up at the end. A credit the way the company.
Customer in Essex Posted on 09/12/2019 , work completed 15/11/2019
The trader replied (on 10/12/2019)
Thank you for your kind review, we always try to look after your property whilst the installation is being carried out to the best of our ability.
Professional and efficient
Customer Service
Quality
Value
I have used them on a couple of occasions before for whole house double glazing. They were by far cheaper than the multinationals and a better product. Also gave a 10-year guarantee. We had this house double glazed including bi-folding doors in 2013. Our neighbour was looking for a cheap supplier but was so impressed with the work being done on ours she had her whole house done too by AGS. We needed a garage side door replacing from wood. Should have done it in 2013! Still the same efficient family-run company. Would thoroughly recommend.
Customer in Kent Posted on 10/12/2020 , work completed 19/11/2020
The trader replied (on 28/01/2021)
Thank you so much for taking the time to leave such a lovely review. It really is much appreciated and we are so glad you are happy with our service. Best wishes Advanced Glazing Systems
Perfect job.
Customer Service
Quality
Value
First rate company & first rate workmanship. Would not hesitate to recommend them.
Pauline, Essex Posted on 19/07/2018 , work completed 19/07/2018
Excellent job
Customer Service
Quality
Value
Great work, window and patio door look great. Friendly and professional company. Would recommend and use again.
Debbie, Essex Posted on 06/06/2018 , work completed 06/06/2018
Excellent products & service
Customer Service
Quality
Value
A complete package from initial meeting to fitting & resolving a few issues. Customer service is exemplary!
Which? Trusted Traders Consumer Posted on 08/06/2018 , work completed 08/06/2018
Excellent job
Customer Service
Quality
Value
This is the second time I have used AGS and as before, there was no 'hard sell' and the work was carried out quickly and efficiently.
Which? Trusted Traders Consumer Posted on 19/07/2018 , work completed 19/07/2018
Highly professional
Customer Service
Quality
Value
Cleanest workmen and methods I've used. Professional and efficient, worked to expected timescales and budget.
Which? Trusted Traders Consumer Posted on 06/01/2019 , work completed 06/01/2019
Brilliant job. Prompt and professional
Customer Service
Quality
Value
Excellent job. I would use them again. I also would recommend them.
Which? Trusted Traders Consumer Posted on 20/08/2018 , work completed 20/08/2018
Highly recommended.
Customer Service
Quality
Value
Was recommended to A.G.S. Glazing, and am thrilled with quality, workmanship, and fitting of front door and glazed side lights. Will use this company again in future without hesitation.
Janet, Essex Posted on 06/10/2018 , work completed 06/10/2018
Helpful, prompt & professional.
Customer Service
Quality
Value
We asked for quick service to replace broken windows before winter weather arrived and AGS were helpful, prompt and professional. Very happy.
Which? Trusted Traders Consumer Posted on 22/11/2018 , work completed 22/11/2018
Prompt professional good value.
Customer Service
Quality
Value
Initial contact very good with no pressure sale. Work carried out on time to a very high quality by very good considerate workman. Price was very reasonable.
Which? Trusted Traders Consumer Posted on 21/01/2019 , work completed 21/01/2019
First class service throughout
Customer Service
Quality
Value
AGS provided a first class service from start to finish I was kept updated at all stages, a very professional job, and reasonable prices. I was very pleased and have no hesitation in recommending this company.
Which? Trusted Traders Consumer Posted on 21/01/2019 , work completed 21/01/2019
New front door
Customer Service
Quality
Value
Can't praise this company too highly. Expertise second-to-none. Their work ethos is exemplary. Arrived on time, removed the old front door, fitted the new double door, tidied up as they went along, so no mess. Demonstrated how the lock worked, nothing too much trouble. I have used them before to fit double-glazed windows, so expected nothing less than perfection, which certainly was confirmed. I would have no hesitation in recommending them for customer service, quality of workmanship and value for money.
Pauline Diable Posted on 17/07/2019 , work completed 06/06/2019
Excellent work and service
Customer Service
Quality
Value
This is the third time I have used this company and as usual the work was carried out in an efficient and competent manner from my first enquiry regarding the job and the completion. The company is a family run business and all members are pleasant and helpful from the office staff to the actual installers.
Jean in Greater London Posted on 17/07/2021 , work completed 09/07/2021
The trader replied (on 04/10/2021)
Thank you for your kind review
New Porch, Front Door & Monocouche Render
Customer Service
Quality
Value
Absolutely amazing. Has completed changed the front of our house from half ugly old render, old flat roof porch falling apart and old sliding glass door and wooden 2nd door. House now looks beautiful in chalk white render, chartwell green front door, pitched roof porch. We already had the windows and back bifold done 6 months prior by Andy and his AGS team. They were best price and done the best work then. So asked if they done porches/render as well as front door after some disappointingly high quotes elsewhere from more builder based companies. Yet again AGS come out best on price, Andy as detailed as ever, his building team done an amazing job, worked so hard and in 8 solid work days changed the front of our house into something looking brand new. Outstanding. Having never liked quotes and work being done but have been absolutely chuffed to bits we found AGS. They should really call themselves advanced fanatical home improvements as so much more than glazing.
Cliff in Essex Posted on 18/05/2021 , work completed 28/04/2021
The trader replied (on 20/05/2021)
Thank you for your kind review.
Great quality
Customer Service
Quality
Value
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.
Superb job - highly recommend!
Customer Service
Quality
Value
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
The trader replied (on 13/06/2023)
Thank you for your kind review
Highly recommended expert family business
Customer Service
Quality
Value
We had a new composite door fitted and repairs to existing double glazing. We paid a good price but got an outstanding service. Expert friendly advice, very helpful and patient while we chose the right product. The office team are also very efficient and kept us fully informed. The work was done on budget and on schedule. We are very pleased with the result, very tidy finish and solid door that looks great and fits well. Not a big job for them but we got top quality service. It is a local family business and that shows in their desire to maintain a good reputation.
Customer in Essex Posted on 22/08/2022 , work completed 03/08/2022
The trader replied (on 13/06/2023)
Thank you for your kind review
Great experience throughout entire process
Customer Service
Quality
Value
I would highly recommend Advanced Glazing to anyone. From the first call to get a quote, to the survey and finally to the fitting and payment/accounts, everyone I dealt with were personable, friendly, professional and courteous. And the final job was done to a high standard - they even left the house pretty spotless, which is always a bonus. They were also very competitively priced and felt much better going to an independent, family business.
Customer in Greater London Posted on 26/06/2023 , work completed 15/05/2023
The trader replied (on 26/09/2023)
Thank you for taking the time to leave us a review, we are so pleased you are happy with our team and the service that you received. Thanks again.
Patient, Fast, and Professional
Customer Service
Quality
Value
AGS patiently waiting and supported for several months while I painstakingly got planning permission to replace my windows (due to an edge case in planning law). They then respected their original quote, and installed my windows within a few months. This included having the scaffolding up and down in a week, to avoid antagonising the ground floor flat, as well as allowing my builder access to the scaffolding to drill an external hole. The windows were smart and energy efficient, with a couple of minor issues that were quickly addressed.
Customer in Greater London Posted on 17/12/2023 , work completed 13/12/2023
The trader replied (on 13/02/2024)
Thank you for your review.
Front Composite Door and Side Lights
Customer Service
Quality
Value
Have now used Advanced Glazing for a few years.Would give them more than 5* if it was possible,great staff,from office,sales surveyor to fitter.The job always gets done to a top spec,Can not fault one bit.Would highly recommend Advance Glazing as everything from start to finish was 100% perfection.Whatever your requirements they can assist and get the Job done.Thankyou Advance Glazing for the great work you've done on our properties.
Customer in Greater London Posted on 25/01/2024 , work completed 22/01/2024
The trader replied (on 13/02/2024)
Thank you for your review
Very Pleased
Customer Service
Quality
Value
A b s installer visited me today to fit new composite front door and frame, arrived on time in fact he was early got on with job worked solidly until job was finished, polite tidy and completed a very good job, i'm very satisfied that i chose abs they did a very good job
Customer in Greater London Posted on 06/02/2024 , work completed 24/02/2006
UPVC windows Installation
Customer Service
Quality
Value
What can I say ... what a superb experience from start to finish. Family business run very well. I had several windows and doors changed all went well. I would highly recommend, polite and helpful team, John, Julie and Ella all 5 stars. I am very satisfied with the quality of the install. I have recommended them to a few friends.
Customer in Greater London Posted on 10/04/2023 , work completed 10/03/2023
The trader replied (on 13/06/2023)
Thank you for your kind review
Excellent windows and doors supply and installation
Customer Service
Quality
Value
We had all our windows and doors replaced by AGS, and from start to finish their service was first class From the initial meeting there was no hard sell just lots of useful advice and support; - the fitting was a full weeks work, and any problems that come across was resolved effectively; - the two fitters where excellent and worked very hard and always left everything spotlessly tidy; - the aftersales has been great - any issues have been dealt with in an efficient and effective way.. Goes without saying if you are looking for new windows I would definitely recommend Andy and his team at AGS
Customer in Greater London Posted on 16/10/2024 , work completed 14/06/2024
The trader replied (on 10/04/2025)
Thank you for your kind review
excellent service great product good price
Customer Service
Quality
Value
Having installed double glazing 12 years ago and to a very high standard they have just installed more windows in the property. They are very professional and quick to provided an estimate and then send a surveyor and finally install the windows. Their prices are very competitive and their products are of a very high standard. The staff are excellent and helpful and their fitters managed the work in one day and were very professsional. They are a small family business and need to be supported
Customer in Greater London Posted on 08/10/2025 , work completed 26/09/2025
The trader replied (on 26/11/2025)
Thank you for your kind review.