Grabex Windows Ltd Reviews 244

TrustScore 4.5 out of 5

4.6

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Review summary

Created with AI, based on recent reviews

Looking at 39 reviews, reviewers overwhelmingly had a great experience with this company. Customers consistently praise the staff for their professionalism, helpfulness, and positive attitude, making interactions pleasant and productive. The service provided is frequently highlighted as exceptional, with many people appreciating the efficiency, attention to detail, and ease of their overall experience, from initial contact to installation. Reviewers are particularly impressed with the high quality of the products, noting their durability and aesthetic appeal, and many express satisfaction with the aftercare service, which is described as responsive and thorough. However, some customers also noted concerns regarding mid-to-long-term product quality, with some experiencing issues like permanent streaks on glass and units failing over time. A few other people also felt that the aftercare support and communication could be improved, questioning the support structure beyond the initial installation period.

What people talk about most

Service

Clients share positive opinions on service, consistently praising the helpfulness and professionalism of the... See more

Staff

Reviewers consistently express satisfaction with the staff, highlighting their professionalism, helpfulness,... See more

Quality

Reviewers highlight positive aspects of quality, with many praising the very good quality products,... See more

Product

Consumers find the product quality to be highly satisfactory, with many praising the excellent quality of... See more

Customer service

People report positive experiences with customer service, highlighting the team's responsiveness and... See more

Reviews shaping this summary

Rated 5 out of 5 stars

We can thoroughly recommend Grabex Windows who supplied and fitted our new glazed front door and two glazed side panels. Greg was our initial contact and was very helpful through the design phas... See more

Company replied

Rated 5 out of 5 stars

My experience with Grabex has been outstanding . I could not fault them from start to finish . The communication from Matt was very good, the installation went without a hitch and the installers , Gre... See more

Company replied

Rated 5 out of 5 stars

I have my windows done about 3 years ago and the patio door has moved a little bit, so it was difficult to closed, I called them and arrange for one of their man to come and see, Today Mr Richard came... See more

Company replied

Rated 5 out of 5 stars

We had rooflights, new windows and a door installed at the back of our house by Grabex five years ago. We were and remain really pleased with them. Recently we had a small issue with the lock on one... See more


Company details

  1. Window Supplier
  2. Aluminum Window Manufacturer
  3. Door Manufacturer
  4. Double Glazing Installer
  5. Manufacturer
  6. PVC Windows Supplier

Written by the company

Grabex Windows is a specialist manufacturer and installer of bespoke, high-quality timber and premium aluminium windows and doors. Based in Orpington, Kent, we supply and fit for residential, commercial, and trade customers across Greater London, Kent, Surrey, and surrounding South East areas. Our made-to-measure double-glazed (and triple-glazed) product range includes timber sash windows, aluminium bi-fold and sliding doors, glazed roofs, steel doors, and heritage timber windows and doors. Get the best quality, factory-direct products tailored to your exact requirements.


Contact info

4.6

Excellent

TrustScore 4.5 out of 5

244 reviews

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Rated 5 out of 5 stars

Excellent job on new front door

We can thoroughly recommend Grabex Windows who supplied and fitted our new glazed front door and two glazed side panels.

Greg was our initial contact and was very helpful through the design phase, which included a tour round the factory. Lukas was proactive and clear on the survey, Richard and Phil did a great job fitting the whole unit, and Matt in customer service coordinated everything well.

Must also give a big shout out to Hugh Wootton of Specialist Glass Company in Sidcup who created our three beautiful stained glass panels. Hugh was recommended by Grabex and works regularly with them.

November 18, 2025
Unprompted review
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Reply from Grabex Windows Ltd

Thank you so much for your fantastic 5-star review John! We’re delighted to hear that you’re pleased with your new glazed front door and side panels, and that the entire process, from design to installation, was a positive experience.

Greg, Lukas, Richard, Phil, and Matt will be thrilled to know their efforts made such a great impression and it’s wonderful to hear that each stage met your expectations. We’re also pleased that our recommendation of Hugh Wootton and his Specialist Glass Company worked out so well. His stained glass work truly adds something special to our entrance doors.

Thank you again for choosing Grabex and for your kind recommendation. If there’s anything more we can help with in the future, we’re always here to assist you!

Rated 5 out of 5 stars

This was a good experience

This was a good experience - our sale consultant Marta Bouziane was very helpful and patient with us - the process was long as we have had to make a few changes due to unexpected design challenges. The installation was timely and professional.

October 1, 2025
Unprompted review
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Reply from Grabex Windows Ltd

Thank you for your 5 stars Dorota and for such great feedback and your kind words about our team members! Glad you had a good experience from the initial contact to the installation! Let us know if we can be of any help in the future, all the best!

Rated 5 out of 5 stars

Great double glazing experience

I had double glazing windows installed in my period property apartment several years ago. I had a great experience from start to finish - quality materials, like for like design for period properly, and professionnel fitting. What made Grabex stand out is their customer service. I had an issue opening a window that had been closed for a while. Grabex were responsive in arranging a visit, didn't charge to fix the issue and provided a helpful tip on maintenance long term.

October 6, 2025
Unprompted review
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Reply from Grabex Windows Ltd

Thank you for your wonderful review and your 5 stars! It's so great to read about your experience from start to finish and that you're happy with the outcome and our customer service- it means a lot to our whole team! If you ever need any further support or advice on your windows and doors, we’re always happy to help!

Rated 5 out of 5 stars

I had 4 windows and a door installed

I had 4 windows and a door installed, replacing existing old windows with bad insulation.Grabex were professional throughout. I highly recommend.

October 2, 2025
Unprompted review
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Reply from Grabex Windows Ltd

Thank you Michael! So glad we could help and that you're happy with your new windows and doors! Thank you for your kind words and recommendation! Let us know if we can be of any help in the future!

Rated 5 out of 5 stars

Incredible service from Grabex !

Incredible service from Grabex from start to finish and very happy with my new windows and doors. A professional, dedicated team whom i thoroughly reccommend.

October 7, 2025
Unprompted review
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Reply from Grabex Windows Ltd

Thank you for your 5 stars Zoe and for your kind words about our team! It's been a pleasure working with you! So glad to hear you're happy with your new windows and doors! Always happy to help in the future! All the best!

Rated 5 out of 5 stars

Great experience with Matt and Greg at…

Great experience with Matt and Greg at Grabex. Everything completed on time and to great standard. Highly recommend!

October 7, 2025
Unprompted review
Grabex Windows Ltd logo

Reply from Grabex Windows Ltd

Thanks so much for your kind feedback Andrew!
We’re thrilled to hear you had such great experience working with Grabex Windows in London. Quality windows and doors, fitted on time — that’s what we love to deliver! Thank you so much for your recommendation! And please give us a shout if we can be of any help in the future!

Rated 1 out of 5 stars

Property owners screwed up in business to business deal

Grabex dealt the windows order with by builders as btb deal. Property owners paid the builders for the windows. After works are finished, Grabex required the property owners to pay £150 + VAT to have the account under their name and said windows were provided without warranty whilst builders sold to the property owner a 10 years warranty. Property owners BE CAUTIOUS about this mechanism which will screw you up.

September 23, 2025
Unprompted review
Grabex Windows Ltd logo

Reply from Grabex Windows Ltd

Dear Vanessa,
We are sorry to hear about your disappointment, but we feel it’s important to clarify the situation for accuracy. We also feel disappointed, after exchanging correspondence with you, where we were trying to be helpful, only to read this review.

You contacted us about the service for the bifold doors purchased 7 years ago. We informed you that this product was not supplied by us (as your builder indicated) and only your timber windows were, and this particular order was placed directly with the builder on a business-to-business and supply only basis. The builder was the legal contract holder with Grabex, and our contract, invoices, and guarantee were issued in the builder’s name only - nobody corrected us at that time that this was not the case, and they should be issued in a different name. You also admitted that you paid builders for the windows.

As clearly stated in our Terms and Conditions:
-Guarantee documents are issued exclusively to the person or company who signs the contract with us.
-Warranty rights do not transfer automatically to third parties or new property owners.
-A formal transfer process must be followed, which involves a £150 + VAT administration fee, if the guarantee and contract records are to be updated at the later date in different names.

In this case, as the builder purchased the windows on a supply-only basis, they were responsible for both the installation and for providing any assurances they gave to you as their client. Our guarantee obligations apply solely to our direct customer (the builder), unless the proper transfer procedure is requested and completed.

We always recommend property owners confirm warranty transfer arrangements with their builder at the time of purchase, as this avoids misunderstandings later.
We hope this clears up the matter and reassures future customers that our terms are transparent and consistently applied.

Rated 5 out of 5 stars

I had windows and doors change in my…

I had windows and doors change in my home . I'm very please for work you have done. Igor and Dorian were extremely helpful , professional and hard working people, very positive and cherfool . They work longer to get job done with one short break through whole day.
Menager Mariusz told us how to protect windows and doors. Hi provide us with silicon spray for locks and seals.
Thank you Grabex .

September 5, 2025
Unprompted review
Rated 5 out of 5 stars

Excellent after sales service

We had some really lovely bifold doors made and fitted by Grabex about eight years ago. They were not the cheapest but we love them and have been very happy with them. A few days ago, we started having trouble with the lock. I checked my paperwork and we had a 10-year guarantee. I got in touch with them, and they couldn't have been more helpful. A day or two later, their chap Richard turned up and fixed the doors (no charge). Really impressed.

August 29, 2025
Unprompted review
Rated 5 out of 5 stars

I am so pleased we chose GRABEX

From the initial enquiry through to the installation the service and attention to detail from GRABEX has been everything we could have hoped for. As for the windows and additional work? amazing value for money and such a worthwhile investment. Thank You!

August 31, 2025
Unprompted review
Rated 5 out of 5 stars

Brilliant service

Follow up visit from the team at Grabex to service my beautiful sliding doors. Prompt, efficient service with a smile. Nothing is ever too much trouble and you can rest assured that they provide really excellent customer care. 10/10.

August 18, 2025
Unprompted review
Rated 5 out of 5 stars

Excellent service and product (Georgian Style paned windows)

We contacted Krystian at Grabex Windows to gather information, to replace our kitchen windows and bedroom windows on same floor.
He was excellent to deal with and very professional, as was Lucasz the Surveyor, and Matt (in office).

We finally had the paned "Georgian" style windows fitted very quickly from initial consultation with a great result!
We would recommend the Grabex window products and the very professional staff for windows!
Our new windows look great and we're very pleased with them.
Thankyou to all at Grabex (and to fitters Ryan and Scott)!
Excellent!

August 15, 2025
Unprompted review
Rated 5 out of 5 stars

Krystian Brzozowski and his team were…

Krystian Brzozowski and his team were extremely professional in every aspect of the job. I observed good time keeping, hard work, attention to detail, polite manners and transparency throughout the work conducted on our house. Very happy with the new windows and door that was installed. Highly recommend their services.

April 28, 2025
Unprompted review
Rated 5 out of 5 stars

Grabex Aftercare Service

We had rooflights, new windows and a door installed at the back of our house by Grabex five years ago. We were and remain really pleased with them. Recently we had a small issue with the lock on one of the windows and contacted Grabex. They quickly responded and within a few days the problem was dealt with. The aftercare service was efficient, friendly and professional, just like our dealings with them five years ago, and we will have no hesitation in using them again in future for further work.

July 22, 2025
Unprompted review
Rated 5 out of 5 stars

Fantastic, helpful company

Matt went above and beyond in his customer service. After our initial site visit the communication with the company was fantastic. They even called us back to discuss an alternative idea they had thought of which would make our home more secure. They didn't try to up sell us in fact they saved us money. They were very patient with us when we had a delay on our build and then fitted us in last minute so that we didn't have to have our house open to the elements. Would highly recommend this company and have now used them several times. Customer service 5 star

July 3, 2025
Unprompted review
Rated 5 out of 5 stars

A big thank you to all at Grabex

Thank you to Mario and his team who did a wonderful job installing a new glazed roof and window in my kitchen. Also, the office team, who were so helpful in getting my project sorted and done. Nothing seemed to be too much trouble. I am very happy with the quality and standard of work provided by Grabex and I will certainly be recommending them.

June 13, 2025
Unprompted review
Rated 5 out of 5 stars

The whole team at Grabex were amazing…

The whole team at Grabex were amazing from start to finish. Matt in customer services and the installation team were great to work with. Our bifold doors are beautifully made and everyone comments on how amazing they are. We will definitely use Grabex in the future.

May 16, 2025
Unprompted review
Rated 2 out of 5 stars

A disappointing experience of one bay window

I was disappointed with my Grabex window installation. My first issue was that the original installation date was changed and rescheduled due to a glass delay, although in fairness, I was given sufficient notice of the date change, but it was frustrating nonetheless and not a great start.

Secondly, prior to installation, at initial quote stage and during the survey, I asked whether three plantation blinds fitted over the original windows could be re-fitted after the window installation. I was told it was a conversation to have with the fitters. On the day of installation, I was advised I should have removed the blinds myself, that they would not be re-fitted and the cost of removing them would be £250, in cash.

Grabex say they told me I needed to remove the blinds prior to installation. This isn’t true. Grabex told me to clear the room as much as possible, including pictures on the walls; which I did. They told me to cover everything with dust sheets, which I did. They did not tell me to remove the blinds, so I didn’t. If the blinds needed to be removed, I would have removed them, rather than leaving them screwed to the window frames, delaying the work and having to pay an additional charge that I had not budgeted for.

Grabex asked me if I wanted to completely cancel the installation and pay a reduced cancellation fee because the original installation had been rescheduled. To compromise, I proposed Grabex reimburse £150 of the £250 I paid in cash, which they agreed to. I had already planned to tip the fitters £100, so it sort-of worked out, but it unfortunately took Grabex almost 2.5 weeks to transfer the agreed £150 into my bank account.

Thirdly, the wooden fittings/ surrounds around the windows were either measured incorrectly or not cut to the correct size. Either way, the work was not completed in one day as agreed and a second fitting had to be organised, with the closest appointment being one week after the installation. These things happen, but when they happen, you expect residual work to be finished within a short period of time, not one week later.

Fourthly, on the day of the second fitting, 30 minutes before the work was due to start, I was told the fitting would probably be cancelled because of ill health. Two hours later, I phoned Grabex; and was advised the work would not be carried out and was offered an alternative appointment 5 days later. Due to work commitments, I had to turn the date down and wait until the following Friday, 2 weeks after the original fitting.

We all get ill, it’s one of those things, but to have no other fitters available was annoying and there seemed to be no sense of urgency, particularly given that I had already been left with an incomplete installation for one week. Grabex later said it was a personal reason for the late cancellation, and if that is the case, then I am of course sympathetic to the fitter and I hope they are okay, but Grabex, the employer, should have a plan in place to manage employee absence, rather than disclosing personal reasons as an excuse, which is guilt-tripping.

Grabex answer phone calls promptly, and emails are replied to within an hour or so, but my overall experience wasn’t great, and I regret choosing Grabex. It’s a shame writing this review, but it’s an honest account of my experience. They dropped the ball on this occasion, and I hope they learn from my experience.

May 9, 2025
Unprompted review
Rated 5 out of 5 stars

Grabex Maintenance service

I am exteremely happy with Grabex’s maintenance service. The requested visit was arranged promptly upon my request to inspect the Grabex large patio doors which became difficult to slide. Mario lubricared the wheels and rubber and explained the maintenance process. The doors are now moving effortlessly. Many thanks! Renata

May 14, 2025
Unprompted review

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