Scores based on 419 reviews

Reliability & timekeeping

Invoice history based on 361 reviews.

Invoice History
Charged as per quote / estimate100%
Appointments reported as missed (6 months) 0
Average score 9.83
419 reviews
  • Interviewed by Checkatrade
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  • Insurance checked
  • Limited company checked
  • ID checked
  • Address checked
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  • VAT registered
  • Checkatrade standard signed

AGS are the experts in all areas of UPVC 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 do not use agents on commission, that would typically try to bully you into a sale you were not comfortable with. We let the product speak for itself 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 and budget.

Contact us today and find out for yourselves.

We work harder and go the extra mile to offer discerning homeowners the highest quality custom made window, door, roof line and conservatory products at the best value-for-money, with reliable hassle free installation and a no quibble guarantee.

Here at AGS we take our clients requirements very seriously.

  • You will receive the benefit of our vast knowledge and experience to give you the best possible advice.
  • You will receive the most state of the art product range option.
  • You will receive the highest possible standard of service and after-service.
  • You will receive our Ten Year No Quibble Guarantee.
  • And all of the above will be brought to you at the most unbelievable prices.

AGS are registered with both FENSA, together with TGAS who are operated by Chartered Trading Standards Institute certified ADR body, and are Trustmark Endorsed for complete peace of mind that you are dealing with a company that has your interests at heart.

AGS supply and fit, or supply only, the following product range:

  • Windows - All Energy Rated 'A'
  • UPVC Sliding Sash
  • UPVC Doors
  • Composite Doors
  • Lantern Roofs
  • Roof Lights
  • Conservatories
  • Fascias, Soffits and Gutters
  • Bifold and Sliding Doors
  • Cladding

Our product ranges above are available in the following:

  • UPVC - White, Rosewood, Oak, Black or any RAL* colour
  • Aluminum - White, Brown, Black, Silver or any RAL* colour

To discuss our product ranges and finishes with one of our friendly advisors, please contact us. We provide free quotes and estimates and are always available for helpful advice. Call today and ask about our OAP discount.


  • FENSA Registered no 31672
  • TGAS Membership 
  • All Major Credit Cards Excepted

Based in

Folkes Lane, Upminster, RM14 1TH

Works in