Window Installation

New Windows fitted from ONLY: £340 + VAT

Low Cost Window Solutions

Windows made to measure, made to last.

FENSA Certified
BBA Approved
Fully Insured & Guaranteed
Secured by Design
Professional Installation
Free No Obligation Quotes
uPVC Windows Hertfordshire

Premium uPVC

uPVC Windows Hertfordshire

Premium uPVC Windows

Advanced Security & Thermal Efficiency

A+ Rated
Double Gasketed
Energy Efficient
Ultra Secure
Hundreds of Design Variables

Premium Slimline & Standard Aluminum

Origin installer of OW70 & OW80

Origin Aluminum Windows

Premium Slimline & Standard Aluminum Windows

Leading Suppliers of Slimline & Standard Aluminium Windows
Every Window Includes a 20 Year Guarantee
Leaders in Security
Choose from over 150 RAL Colours
Fast Manufacturing Times
Window & Door Repairs Hertfordshire

Our Promise to you...

Your home is your castle, and we’re here to help you secure it with quality windows, doors, and repairs. We pride ourselves on providing the best service and the best value for money which is why…

If you receive a lower quote for the same product and level of service we offer we’ll match it and give you a further 5% off!

Having been in the home improvements business for many years we see first hand just how important it is to select the right product for your home, whether it be for a new Window, Door, Bifold or a Repair.

It’s as much in our interest as it is yours to only use quality products so that once fitted you can sit back and not have to worry about them going wrong.

carrol franklincarrol franklin
09:59 21 Mar 23
I am so impressed with my new doors,from the start to the finish, the whole experience was very friendly and professional . Having my doors replaced last July using a very well-known known company (Safe S....) ,who ripped me off. I was very apprehensive to get someone else.I needn't have worried.
Alan SkippAlan Skipp
21:49 12 Jan 23
Could not fault them. They fitted a number of replacement units and from initial response through to completion, were responsive, polite and very professional - would not hesitate to recommend Dan and his team.
Sophie McSophie Mc
19:04 21 Feb 21
I couldn't have asked for a better service. I'd let my door get to a bad state before finally doing something about it, meaning I needed someone with quick time frames. Other door companies had quoted me 6-8 weeks which I couldn't wait for, so I was thrilled when Dan stated he could do it in 2-3. Not only that, but he got me out of a very sticky situation when I found myself locked in because of the state of the door. Dan's responsive, friendly, professional, and I couldn't be happier with my new door! I would recommend to anyone in a heartbeat.
Abbey WensorAbbey Wensor
11:31 19 Oct 20
Daniel and Andrew were fantastic. The job was all done and dusted within 2 weeks of first contacting them, and the quote was very reasonable. Both were friendly, professional and explained everything fully. Andrew even sorted out a door which was catching, which he didn't need to do. We will definitely be getting quotes from Daniel for our next job. Thank you!
lorraine taylorlorraine taylor
19:40 04 Aug 20
Was having problems with my uPVC front door not closing properly. Dan came out to survey it really quickly after I called, and although I feared a hard sell, he was really honest about what needed doing, a couple of hinges replacing and moving slightly, at a price I was really happy with. The repair was done today very quickly and efficiently. I will definitely keep the number to hand for future issues, and highly recommend.
09:41 14 Jan 23
Just used GM Glazing for a new Door & Window. Very professional service by George & staff. A Good quality product. In fact we were so impressed we’re using their services once again for a larger project. Would definitely recommend them. Very competitive prices as well 👍🏻
Glenn RogersGlenn Rogers
11:42 14 Dec 22
George and his team done a great job replacing six windows on my house.And considering the weather was very cold at times-2c, they got the job done and on time.I have no hesitation in recommendingGM Glazing Ltd.
Lloyd StarkLloyd Stark
08:41 21 Oct 22
We are really pleased with the quality of our new composite door and roof lantern. George has been so helpful and I have no hesitation to recommend GM Glazing to anyone. Fantastic!
charlie lewischarlie lewis
20:01 12 Sep 22
Cannot recommended George enough.Super helpful from the get go, easy communications & quality fitting from him too. Door designer online was very easy to use & nice to see what you’re buying before committing!All round pleasant experience from a quality tradesman, 100% will be using for all doors in future.
Tutu Sparkles PartiesTutu Sparkles Parties
19:39 03 Aug 22
George did an amazing job on our window and door installation. He kept us informed throughout and his honestly over replacing some glass panels due to a manufacturing problem, was refreshing.He was reliable and was so thorough with his work, that many of our neighbour's commented, not just on the end result, but the way he worked. Some even noticed his attention to detail even when cleaning the windows and under the windowsills, after installation. We couldn't be happier with the end result.

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    INSTANT online REPAIR quote...

    Contact Us

    Mon - Fri: 03333 220 270
    Royston, Hertfordshire SG8 9DL AND Hoddesdon EN11 0LB

    Areas Covered



    Bishops Stortford












    Saint Albans



    And surrounding areas…

    Products Include

    uPVC Windows

    uPVC Doors

    uPVC French Doors

    Composite Doors

    Aluminium Windows

    Aluminium Doors

    Aluminium French Doors

    Aluminium Bifold Doors

    Aluminium Sliding Doors

    Timber Windows

    Timber Doors

    Timber French Doors

    Secondary Glazing


    Roof Lights

    Repairs Include

    Replacement Sealed Units

    Misted or Cloudy Double Glazing

    Window & Door Handles

    Window Adjustments

    Sash Window Repairs

    Friction Stay/Egress Hinges

    Front/Back Door Euro Cylinders

    Door Hinges & Adjustments

    Conservatory Replacement Glazing

    Window Repair Company Hertfordshire (Trading name of Argon Windows and Doors Limited) serves the whole of the county including: Baldock, Bishops Stortford, Harpenden, Hatfield, Hemel, Hertford, Hitchin, Hoddesdon, Letchworth, Potters Bar, Rickmansworth, Royston, St Albans, Stevenage, Watford, Welwyn Garden City, Watford and surrounding areas. We offer a professional Window & Door Replacement Service alongside our Repair service replacing your blown (misted or cloudy) sealed units in your uPVC, Aluminium & Timber windows & doors. In addition to this service we also carry out Window & Door repairs including handles, hinges, adjustments and 3 Star Ultion Euro Cylinders.

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