Grabex Windows Ltd Reviews 244

Great service , very helpful team that made the process very smooth from start to end . Great communication, very good quality product and very knowledgeable team at every step . Thank you Team Grabex . Highly recommended.

We recently required some aftercare support following our installation with Grabex Windows, and the experience was very positive.

From the outset, the team responded promptly and handled the request in a professional and organised manner. In particular, Matt, the Operations Manager, was extremely helpful—clear in his communication, responsive, and proactive in ensuring the issue was seen through properly.

Timelines were realistic and adhered to, and the issue itself was resolved efficiently with attention to detail. There was a clear focus on getting things right rather than simply completing the job quickly.

What stood out most was the consistency of the aftercare service. It can often be the case that once installation is complete, follow-up support falls short, but that was not the experience here. Matt and the team remained accountable throughout and ensured everything was resolved to a high standard.

Overall, a reliable and reassuring aftercare service, which reflects well on the company as a whole. We would have confidence in recommending them based not just on the initial installation, but on the quality of service.

So far, doing everything very well!
I as retired mechanical engineer and director of engineering Company, was very impressed with the professionalism, knowledge, cleanliness, helpfulness of both installers!
Also with with the good quality of the widows!
And I hope that the plastering above windows will be replaced.

Found Grabex at the Grand Designs exhibition in London in 2025 where they had their windows on display, they look really good.

I emailed for a curiosity quote for 11 windows, thinking their prices would be beyond my budget as they seemed high quality on the display and as lot of suppliers at GD elevate their prices after the exhibition.
But to my surprise they were the cheapest of all the 6 quotes I had received from my local suppliers.

The sales service was good and they were delivered exactly when they said they would be.

I don't usually leave reviews, but these windows are very good quality and look really great once installed.

one thing to note:
If installing yourself, request for weights to be removed for delivery as they are quite heavy.

Highest quality windows and efficient service. They installed replacement Victorian sliding sash windows several years ago which have not deteriorated at all. They have just installed another for me. A perfect match and excellent value too. Staff are professional and very helpful. I recommended them to our neighbour too, who is equally impressed. I would not hesitate in using them again.

We had all the windows throughout the house installed by Grabex and we are very pleased with the final look. The fitters were extremely efficient and completed the job in a very impressive two days. The onsite lead fitter was extremely helpful with a check in at the start and end of each day and the team did a very good clean up. Grabex customer care team were quick to respond to email communication and promptly dealt with our request to change the handles after fitting. Overall I would highly recommend this company for the quality and ease with which they completed the work.

I had a very disappointing experience with Grabex - particularly with Andy and Martin.

After signing a contract and paying a deposit, it became clear after the survey stage that the installation would require significant structural changes to my property (including removal cladding, and plastering). These requirements were not clearly communicated upfront during initial discussions or prior to signing the contract at all.

More concerningly, I was informed via WhatsApp that the company could not proceed unless they could guarantee 100% waterproofing, effectively putting the feasibility of the project into question under my existing setup. Despite this, I was later told the project could still proceed but only if I accepted additional preparatory work, cost, and risk that were never part of the original agreement.

When I requested a refund on this basis, the company maintained that this was a “customer cancellation” and attempted to apply cancellation fees, despite:
No materials being ordered
No fabrication taking place
No clear or final deliverables provided post-survey

The situation has involved prolonged back-and-forth, with shifting explanations and increasing pressure to either proceed under revised conditions or accept financial deductions.

Overall, the experience has been:
Time-consuming
Frustrating
Lacking in transparency at key decision points

I would strongly advise future customers to ensure all structural requirements and limitations are fully clarified in writing before signing any contract or paying a deposit or perhaps going with another company to save your sanity.

We would like to express our sincere appreciation to Grabex Windows for the excellent job they carried out at Richmond Dental Centre.

From the very beginning, the experience was outstanding. As soon as the installation team, Dorian and Igor, arrived at our premises, I immediately felt confident that the work would be completed to a high standard – and they certainly delivered.

Dorian and Igor were extremely professional, knowledgeable, and respectful throughout the entire process. They carried out the installation meticulously, paying great attention to every detail, especially around the edges and corners of the windows, ensuring a clean and perfect finish.

I would also like to highlight Mario, the caring and attentive manager, who personally visited on the second day to check the progress and quality of the work. His dedication to customer satisfaction and quality control clearly shows the company’s professionalism and commitment.

The team worked efficiently and kept everything well organised. They also made sure to tidy up thoroughly after completing the installation and carefully removed the old windows, which was not an easy task, handling it with great precision.

Overall, I am extremely pleased with the results. The whole team demonstrated professionalism, skill, and attention to detail. I would not hesitate to recommend Grabex Windows to anyone looking for high-quality workmanship and reliable service.

Richmond Dental Centre

Such a fantastic experience with Grabex replacing all the windows in our new home. Everyone we worked with was professional, patient, and very communicative. In the initial stages we worked with Andy from their sales team to think through the kinds of windows we wanted. We loved being able to go into their showroom in West London to get a better sense of the quality and discuss different finishes. When we were ready to proceed Andy came around and did all the measurements and talked us through their manufacturing and fitting processes and stayed to answer all of our questions. After we got the quote and then the detailed measurements we had a few questions and he was always immediately available to jump on a call.

Our wooden double glazed sash windows were completed even faster than they expected, and, most importantly, they are absolutely stunning in our Victorian home and they make a massive difference to our insulation. I wouldn't hesitate to recommend this company to anyone!

Great experience to make a business with Grabex! Outstanding after sale service. Very polite, friendly and helpful engineers.
Quality products that last years. Highly recommended for your new windows/doors.

This is the 4th set of windows we’ve had from Grabex and Arkadiusz over the past 8 years and we were - as always - very satisfied with the quality of the product and the customer service we received. We’ve had both hardwood and UPVC windows installed, and both types have been of excellent quality. The whole process was made very easy due to the professionalism and knowledge of both arkadiusz and the customer services team I would definitely recommend this company for any type of window installation.

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, very clean man, very polite and in 2 second he put the door right, so grateful and it was under garantie , so was all free. Thank Grabex

After being super impressed by Grabex when they repaired our Reynaers sliding doors (when no one else would), we happily returned to Grabex to purchase three more matching Reynaers windows for our loft extension (a large fixed panel 'picture' window and two smaller opening windows).

Mario came to measure up and offered practical advice for the window installation. His product knowledge is second to none.

The windows were installed right on schedule and we are very happy with them. Grabex were brilliant throughout and I would have no problem recommending them. Many thanks, Mario!

We are very pleased with our new back doors from Grabex. The quality of the product is excellent and competitively priced. Throughout the entire process, the service has been polite, courteous, and professional. When we encountered a small issue — which was not their fault — Grabex responded immediately and resolved it without any hassle. I have no hesitation in recommending this company.

I have been a returning customer with Grabex for the last eight years I now have three metal doors opening onto my garden . I recently had an issue with my new door . To cut a long story short a mistake was made with the name of the product, it wasn’t what I had ordered and Grabex acknowledged it and organised a replacement . The care they took to replace the door and repaired snagging was absolutely excellent. Richard and Phill ( accompanied by the manager Mariuz) were totally professional. They also removed and replaced rendering and worked extra hard to match successfully the existing colour. This is my 3rd door and they are great . Beautiful and solid . All in all I thoroughly recommend the company, their friendly and dedicated team and if a problem arises they will go the extra mile to satisfy their customers. A well deserved five star rating . Ms L.Simon

Patryck and John from Grabex fitted our windows over the last two days and we couldn’t be happier with the service. They were extremely hardworking, arrived exactly when they said they would, and nothing was ever too much trouble for them. Both were polite, friendly, and cleared up as they went along, which we really appreciated.

As we was working from home, Patrick and John were very accommodating and completed the windows in the order we had requested so that we could continue working in certain rooms without too much disruption. That made a huge difference for us.

Patrick’s finish is absolutely amazing. My husband is very particular when it comes to workmanship, and even he was genuinely impressed with the quality and attention to detail.

We are also so pleased with Iwona, who quoted for the windows and spent a lot of time going back and forth with us to get everything just right. Nothing ever felt rushed and she was incredibly patient and helpful throughout the process.

Matt, who arranged everything for us, has been fantastic from start to finish. From organising our showroom visit to guiding us through the options available he made the whole process feel straightforward and stress-free. He kept us regularly updated on timescales, let us know as soon as the windows arrived, arranged the installation promptly, and checked in afterwards to make sure we were completely happy. His communication throughout was excellent and we always felt well looked after.

We wouldn’t hesitate to recommend Grabex. Matt, Patrick, John and Iwona have all been amazing and we’re so pleased we chose them.

From our first showroom visit to installation, the service was outstanding. Iwona was knowledgeable and helpful without being pushy, and nothing was too much trouble when we made changes to our quote.

Matt kept us fully updated throughout, arranged the survey promptly, and worked hard to secure installation dates that suited our family schedule. He also checked in with us on both installation days to make sure everything was going smoothly and was extremely helpful throughout the whole process. Lukasz the surveyor was polite and very knowledgeable.

Nine windows were installed over two days by Patryck and John, who were punctual, tidy, and extremely professional. The quality of the windows and the finish is superb — and I’m very particular about detail! We are now looking forward to getting our front door installed and bi-folds later in the year.

A smooth, well-managed process from start to finish. Double glazing can sometimes get a bad reputation, but certainly not Grabex. We wouldn’t hesitate to recommend them.

The windows are great quality and the fitters on the day did an amazing job. They worked in some tight spaces with old walls and left everything clean and tidy afterwards.

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 , Greg and his team were absolute professionals . Peter on sales was also super helpful . I highly recommend this company and will be having them back to do my patio doors .

Professional, friendly team that installed our new, amazing aluminium windows on time and with attention to details. Grabex Windows is a company I will definitely return to while continuing our period house renovations. I also liked the fact that we were advised not only what kind of windows we needed to keep in character with our original 1930's style, but also what works needed to be carried out to make sure the house will be optimised for the changes. Working with Grabex was like a breath of fresh air among the meanders of our lengthy house refurbishment! Bravo!