DISCOVER GRABEX
WINDOWS & DOORS | MADE IN ENGLANDGRABEX DIFFERENCE
We are a family run, Orpington-based manufacturer & installer of windows, doors, glass roofs & bespoke glazing solutions for London & surrounding counties.
Established in 2002, we have spent many years researching the best profiles, components and technologies for residential use, currently manufacturing in a range of timber materials, aluminium and uPVC.
Our wide range of fenestration products for new builds, self-builds & renovations extends from traditional and heritage timber sash windows, bespoke timber entrance doors to modern roof lights, bi-folds and sliding patio doors with our signature slim frames of large aluminium HiVision 25 Sliding Doors and steel-looking Cube windows.



Customer support, sales representative and survey people are all set up to scam you later on and make you make more money that you shouldn’t have. DO NOT TRUST THEM!
We are going to the dispute process and will report this illegal behaviour to the government/official entities.


When it comes to windows I'd also add that the trickle vents that they fit to the windows are terrible and do nothing but amplify outside noise into your house.
I simply cannot recommend Grabex based upon the complete lack of aftercare which is shocking considering the risk it is placing on my family including to young children. Could easily be resolved by someone coming out taking off the lock and putting on a new one.

Highly recommend.



They have also left suction marks that have persisted months after the install. They stopped a supplier from cleaning it on the condition that the glass would be replaced which they alluded to doing but then have gone back on.
They provided an all round poor service and poor product after paying £10,000 for the trouble.
I will be pursuing my consumer rights to resolve this.

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.

Initial issues around the large glass panel and a handle concern meant the job didn’t land as expected.
Since then, the company has stepped up:
• Agreed a significant reduction on the supply and fit cost for the glass replacement
• Committed to a more thorough investigation and resolution of the handle issue
• Overall, a much more proactive and solution-focused approach
Outcome: a clear improvement in service and willingness to put things right, which goes a long way.
Credit where it’s due — the response post-issue has been fair and constructive.


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



As we were working from home, Patryk 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.
Patryks 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, 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, Patryk, 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.






They replaced some old single glazed sashes in our Victorian terrace that were rotting and very drafty. The difference with the new windows is night and day - they look much smarter (but still in keeping with the age of the property) and the house is far warmer and quieter.
The price was also very competitive and the installation team did a fantastic job - working around our builders and producing a really high quality finish (cleaning everything up after themselves which we do not take for granted!)








They promised to send someone if a team was in the area—and sure enough, I got a call back a few hours later with a time slot. The engineers arrived exactly when they said they would and had the door fixed perfectly in under 15 minutes.
Genuinely impressed with the speed, professionalism, and care—especially after several years since the original installation. Outstanding aftercare and customer service. Highly recommended!




But Grabex has truly been a pleasure to work with, making a very large job that we’ve had a number of issues with previously (companies going bust, suppliers not properly securing the window frames during transit etc) such a seamless and positive experience.
From the initial discussions and showroom viewing with Arkadiusz, who was both informative and very helpful in making final decisions, through to the final fitting with the onsite team of Patryk and John, with Mario as an additional supporting hand.
Matt helped with all logistics in between and offered us earlier delivery dates where possible, some flexibility with payment and was very responsive with any small enquiries that we had. Matt was key in ensuring we stayed appraised if any changes/ updates were necessary which really put our mind as ease.
The onsite team of Patryk and John were professional, very tidy, precise and detail oriented at every step and even offered advice and guidance on other elements of our project. The execution of there work was excellent, resulting in a beautiful finish on the house. Alongside Patryk and John, we had the pleasure of working with Mario, who oversaw the customer interaction onsite and any follow up needed. Mario was very helpful in providing recommendations, fixes where necessary and loading with the factory on a specific item replacement.
Even with such a seamless experience, we did have a couple of small fixes/ replacements needed, and the team was very proactive with getting this done. We had one window lock that came from the factory faulty, and within a matter of 2/3 days, Mario had arranged a replacement and re-fitting to ensure everything was complete for us.
The overall experience was so good that only a week after our windows were fitted and complete, we chose to proceed with Grabex for our roof skylights (when we did have another vendor that was slightly cheaper, but working with Grabex gave us all of the reassurance we needed, so we chose to pay a little more for their expertise) and specifically requested the same team of Patryk, John and Mario to be involved to complete this fitting.
The skylight installation (which happened 3 weeks later) was also a large and complex job and with a lot of muscle strength, the team had this completed in one single day, again, a really great job and a beautiful finish.
Overall, Grabex made this experience incredibly easy after the several challenges we faced, and I would 100% recommend them for future projects, and would definitely work with them again. Thank you to the whole team!

It was a huge job and – although it is still early days! – I am very pleased with the result. There were a few minor incidents (as is expected), but the Grabex team (led by Patryk and Mario) were responsive and resolved everything in a timely and professional manner.
My overall experience was great, from sales (Marta) to operational support (Matt) and installation. I would certainly recommend, as their product is of high quality and competitively priced.




On the installation day, the team arrived promptly and worked efficiently, ensuring minimal disruption. Their attention to detail was evident in the precise fitting of both the windows and the door. The finished product looks fantastic, enhancing both the aesthetic and security of my home.
I highly recommend Grabex to anyone looking for high-quality windows and doors with top-notch service.


Regarding the door, The build quality is very high. It came in well balanced and the handle/locking mechanism is smooth and sturdy. The glass was as I wanted, eliminating the sound. I would definitely recommend them.


We had our windows fitted by the most professional, kind and friendly group of Grabex employees. Mirek, Amir, Mario and Martin came over to ensure the tricky bay window installation went smoothly. Although there were surprises they were prepared and did a fantastic job! Thank you for your brilliant service. I cannot recommend Grabex more.






Special thank you to Peter and Matt. I appreciate all your help.

From the beginning till the end.
Marta was amazing in helping us choose the right windows, explaining in detail about each type etc.
We did have multiple options and found it difficult between choosing the ones we want to go with, but Marta was very patient and understanding and I can definitely say we ended up making the best choice.
We went for the black aluminium tilt and turn for most of the house and the quality of the windows seem very high, they are solid, well sealed, and the possibility aluminium offers for having large glass panels allowed us to open up the beautiful views we have from the house.
We opted for intergrated blinds to replace the plantation shutters we had with the old windows and the finish is sleek, modern and tidy.
Every person from Grabex who came to work, check work or sort any issues during installation was super hard working, polite and we were always in the loop about what is going on.
There was an accident with one of the glass units in the morning before delivery, which is obviously part of the trade and can happen, but Grabex were very speedy in sorting the replacement unit and it was all organised hassle free.
I would like to say big thanks to Marta and the whole Grabex team for helping us achieve completely new and really beautiful look to our house.
We have received a lot of compliments from neighbours, which I think shows that the windows passed the test😉
We are already planning the stage 2 of house improvement works and looking forward to work with Grabex on getting the windows for our rear extension.
Thank you.

They managed to perfectly match the style of our other front of house facing windows.
We were so impressed with the quality of both the product and workmanship of the fitters, we decided to return to Grabex for our most recent instalment of two bedroom windows which needed replacing. The communication and customer service from survey to final inspection by the management team was excellent and last but not least, the two gentlemen who carried out the work were very polite and careful in the home during the fitting process. They left the place immaculate afterwards having done a 5 star job removing old windows and fitting the new ones. Thank you so much Grabex windows, we will be returning again if we need windows in the future.
Made to requirements
Technology
At Grabex we are focused on delivering consistency in quality, energy efficiency and sustainability of our products – all manufactured in our 45,000 sq. ft. factory at Orpington.
Our innovative approach to manufacturing set us on the road to re-cycling virtually 100% of our production waste. Our wide range of fenestration products for your new build, self-build or renovation extends from traditional and heritage timber sash windows, bespoke timber entrance doors to modern roof lights, bi-folds and sliding patio doors with our signature slim frames of large aluminium HiVision 25 Sliding Doors and steel-looking Cube windows.
Our process
Warranties
Our experienced and qualified engineers will install your doors and windows to a first class standard, right first time and our installation service is fully guaranteed.
All of our products have extensive warranties that cover your parts against defects for 10 years (some exclusions apply).
We also have a dedicated aftercare team working hard to ensure you’re happy even after we’ve left site.














Your journey with us!
1. Consultation & Design
2. Survey & Manufacture
3. Professional Installation
4. Aftercare & Guarantee
Grabex Installations
Browse our interactive map of Grabex Windows installations and see whether we've already installed in your neighbourhood!
If you're not sure whether we deliver or install in your neighbourhood - please get in touch and tell us about your project!
At Grabex, we are conscious of our planet and always try to choose the most environmentally friendly and sustainable options. We are a responsible manufacturer, sourcing materials from suppliers who practice sustainable development and recycling virtually all of our waste.

