Window Repairs

Window Repairs from ONLY: £120 + VAT

Window & Door Repairs Made EASY

We believe in making things simple, that's why we've created a FIXED pricing structure so you know exactly how much your replacement units will cost.
Do I have Fanlights or Casement Windows?

Please refer to the window illustration to determine if you have Fanlights that need replacing or Casements or a mixture of both!

Use our INSTANT online quote calculator

Our INSTANT online quote calculator puts YOU in control of the total cost, we don’t believe in hidden costs just a great service at competitive prices. Use our FREE calculator here: Get Quote

Next Steps

Once you’ve selected how many sealed units need replacing and you’re happy with the quote simply hit the ‘Next’ button and fill in your details along with preferred survey time & date. Once we’ve received your details we will aim to respond within 24hrs to confirm your appointment.

Nothing to pay until after your survey

Once your survey has been completed we will ask you for a deposit which can be paid electronically using our payment terminal or via BACS. Your order will then be processed and your replacement sealed units fitted typically within 7-10 working days.

upvc sealed units

Get an INSTANT online quote today!

Quick & Cost-Effective Window Repairs

Why replace when we can repair?

FENSA Certified
BBA Approved
Fully Insured & Guaranteed
5-Star Rated Service
Professional Repair Service
Free No Obligation Quotes
uPVC casement windows in Hertfordshire

Sash Window Repairs

Sash Cord Replacement

Bring your sash windows back to life

Stuck or Hard to Move Sash Windows?
Sash Window Refurbishment
Includes: Cords, Locks, Weights, Rollers, and more
Cheaper Than Replacing
Fixed Price Solutions

Sealed Unit Replacement

Window Repair Before & After

Restore Your Window’s Thermal Efficiency

Windows Misty, Foggy, or Cloudy?
10 Year Guarantee
Upgrade to Solar Control Glass
Cheaper Than Replacing
Fixed Price Solutions
Anthracite Grey uPVC windows in Hertfordshire

Our Other Window Repairs...

Window repairs from only £120+VAT

Window Handles
Window Adjustments
Window Hinges
Conservatory Replacement Glazing
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.

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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