Endorsed by Which?

Advanced Glazing Systems Ltd

4.9

362 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
362 reviews
Customer Service
5.0
Quality
4.9
Value
4.8
Sort by
Surpassed our expectations
Customer Service
Quality
Value
All new doors and windows fitted. We found this company excelled in all services it provided. We had spent several weeks asking numerous questions about product design, efficiency, alternatives such as acoustics and laminate glass, size, design, seals and gaskets, trickle vents, creasing tiles, door handles and locking mechanisms. The company was very patient answering all our inquiries, was able to provide detailed information to support quality of products so that we could check for our peace of mind. Installation was very efficient and staff courteous and professional. Work carried out to agreed schedule and accommodated our own work commitments. All completed within budget and no hidden costs. What we were particularly pleased about was accommodating our special request to have our kitchen window sprayed black on the inside whilst remaining white on the outside, which is not standard and required third party involvement which the window company dealt with directly. In summary, we would highly recommend this long established family company who really go the extra mile to ensure a first class experience.
Customer in Thurrock Posted on 30/06/2024 , work completed 26/04/2024
The trader replied (on 03/07/2024)
Thank you for your kind review.
Great company
Customer Service
Quality
Value
We have used A G S several times and have received nothing but excellent service each time. The office staff were helpful and friendly, the fitters were efficient, worked to time and left the site clean and tidy.
Customer in Greater London Posted on 01/04/2025 , work completed 27/03/2025
The trader replied (on 10/04/2025)
Thank you for your kind review
New composite door
Customer Service
Quality
Value
I love my new door! My rep, Tyler, was so helpful in guiding me through the process, providing the clarification and info I needed in order to complete the spec for my bespoke door. He was endlessly patient with my to and fro calls and emails and the rest of the AGS team were equally polite, helpful and efficient. For both measurement and fitting, they came when they said they would and did what they said they would, and all so fast! I'd happily use AGS again and have recommended them to my friends. Thank you Tyler and AGS!
Customer in Greater London Posted on 21/01/2025 , work completed 02/12/2024
The trader replied (on 10/04/2025)
Thank you for your kind review
Lovely new front door
Customer Service
Quality
Value
AGS were super helpful from the start. We have tried 3 or 4 times in the past to get a new fire rated front door (FD 30), glazed, with no success, but AGS made it a pleasant and straightforward process. From the initial consultation, survey and fitting, they took trouble to make sure we got exactly what we wanted. Looking forward to winter now, with no draughts, and lots of light coming in, we are so pleased with the door which has transformed our flat!
Customer in Greater London Posted on 23/05/2025 , work completed 14/05/2025
Professional and efficient
Customer Service
Quality
Value
Very professional from the first meeting delivered all responses. Work and schedules on time and to a high standard. Would not hesitate to recommend.
Dena, Essex Posted on 05/03/2015 , work completed 05/03/2015
Which? Local Review
Customer Service
Quality
Value
Small family company, no hassle sales pitch, sensible, honest, good workmanship. Took nightmare out of looking for double glazing company.
Which? Trusted Traders Consumer Posted on 04/08/2009 , work completed 04/08/2009
My Review
Customer Service
Quality
Value
Excellent.
Mark, Essex Posted on 25/09/2015 , work completed 25/09/2015
Excellent service
Customer Service
Quality
Value
AGS Were very reliable, professional & competitive.
Darren, Essex Posted on 21/07/2015 , work completed 21/07/2015
Prompt & professional
Customer Service
Quality
Value
The fitters arrived early each morning & work was carried out to a good standard. Andy kept in touch the whole time & sorted out any problems
Debbie, Essex Posted on 16/11/2015 , work completed 16/11/2015
100% satisfaction on all aspects.
Customer Service
Quality
Value
On 04/02/10, we had the windows and door replaced by AGS and were very impressed by the professional way our order was taken with help, then the very high quality of materials and fittings. On 30/09/15 we chose AGS again to fit windows and door to a new extension on rear with same full satisfaction.
William, Kent Posted on 30/09/2015 , work completed 30/09/2015