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
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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.
Murray Road, BR5 3QY, Orpington, United Kingdom
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The front door was installed with gaps, and the glass layout is incorrect. Despite multiple service attempts and a supplier visit, the issues remain unresolved. After 7 months, communication has stalled, and a site visit has not occurred.

Reply from Grabex Windows Ltd
Doors are now three years old and in great condition. Asked for some advice on maintenance and a great experience.
The Grabex team today, Mario, Mirek, Amir, Richard & Phil were exemplary, they worked tirelessly all day to finish our project. At every stage the works were explained and maintenance tips provided. The team were courteous at all times and thoroughly professional, I would highly recommend Grabex Windows to anybody. Thank you so much
Starting with the on-site survey with Lukasz who was extremely knowledgeable and happy to discuss various options, through to the installation team with Patryk, Greg, John and Michael, our experience with Grabex has been excellent. Together with the on-site Manager Mario who was available during the installation, we were able to find the ideal solution for the small details that make our timber windows really stand out. Mario’s customer care and in depth knowledge was extremely helpful. We had wanted to try to replicate the style of our original timber Windows but with the benefit of being double glazed which we have achieved.
The entire fitting team were punctual, polite and tidy and nothing was too much trouble to be addressed. They worked hard throughout each day to ensure our windows were installed to perfection.
Credit should also go to Matt in customer services who was on hand to liaise with fitting dates (and even offering to bring the fitting forward by a week) and also to help oversee the encapsulation of a stained glass window with Hugh Wootton from The Specialist Glass company who was also excellent. Alicja in accounts was always a pleasure to speak to as well! Overall a great result.
I have used Grabex in the past and they were great that’s why I got back to them for this job. The have done a very good job, good quality, professional and excellent service.
I'd badly installed large bay windows( by some cowboys who had damaged the walls) in my Edwardian house. Kristian from Grabax Windows had the experience to deal with damaged Windows. He and all his team members were
knowledgeable, efficient, polite and honest professionals. New Windows were measured, manufactured and installed in less than 4weeks.windows look amazing n has transformed both the rooms. All the members of the installation team ,liaised with my builders where the window walls were badly damaged so as to restore it to is original look. Greg,the main installer, was very kno, he paid attention to my concerns about badly damaged walls by the previous cowboys company (went bankrupt ).
I've no hesitation in recommending this company. After sales communication was excellent.
Very reasonably priced too.
Punctual and professional they are
Fantastic service end to end from Grabex, installing our French doors and UPVC windows. From the start - visiting their showroom with Arkadiusz which he opened for me on a Saturday and turned a competitive quote around that weekend — to the insight on best options during the survey from Lukasz, to the professional and quick installation from Patryk and Johny, and the onsite VIP service from Mario, it was incredibly smooth and professional. Great quality product and a huge difference to our property. Massive thanks to the team!
AWFUL AWFUL AWFUL! We had a window in mind and they insisted we go with their recommendation. We have a sky light window and there was a crack in it the minute it was fitted it and before we even moved in to our renovated home the crack had gotten bigger and has continued to grow. They haven’t even come to look once and Martin keeps beating around the bush. They refused to help or compensate and we have spent ALOT of money with them. I’m talking tens of thousands and they haven’t bothered at all to correct this mistake of theirs. Such a shame because it put huge stress on what was meant to be a new beautiful beginning. Do not recommend at all. Have spoken to a few people who have had similar issues. It’s also a huge hazard as the crack is getting bigger. Hugely disappointing.
Absolute shocking services . We have spend A LOT OF money getting a very nice open celling window. First we notice a small crack and told grabex however it's been MONTHS still no one has bothered come to look at it. The crack has now got even bigger. Grabex simply want nothing to do with it. Like I said considering how much we have spend. Ridiculous
TO DATE 02/04/2025. TO THIS DAY THEY HAVE STILL NOT COME TO HAVE A LOOK!!!! IT HAS NOW CRACKED IN THREE PLACES AND THE COMPANY HAVE ADMITTED THAT THERE IS A DANGER TO ME AND MY FAMILY. This is really out off control now I can't Believe they are willing to put my family at risk.

Reply from Grabex Windows Ltd
Fantastic aftercare service! After reporting a fault with one of the sliding door handles on Wednesday - 5 years after the original installation - we were delighted that Mario arrived as promised and fixed the problem today! He then spent extra time showing us how to help maintain our huge aluminium sliding doors using specialist products we hadn't even heard of. Couldn't be happier!
Customer support were absolutely fantastic (Matt particularly). He brought our delivery date forward and was always on hand to answer questions or offer advice. Some other members of staff we found harder to work with but Matt got the job done excellently.
Many thanks to the Grabex team who handled the recent French door & kitchen window installation. All round friendly, timely & efficient service from the installers Greg & Michael and manager Mario with great support from Arkadius in sales, Matt in logistics and surveyor Lukasz
The entire experience with Grabex was first class from sales through to installation. Their installation team's attention to detail was exemplary and they now have another really happy and satisfied customer.
Our Grabex 4 windows replacement went perfectly yesterday. Amir & Mirek were very friendly and professional. They got straight down to replacing the windows once they arrived. They were extremely hard working and kept at it till they left. There was hardly much noise and no disruption. The windows look great - which is most important thing. They cleared up really well - no mess left. Amir walked us through the new windows and using the keys etc for opening and closing. Mario their manager popped in and gave us some good tips for maintaining/cleaning the windows which we will follow (will also look at the maintenance guide Matt has just sent a link for. I would say we had a 10/10 experience yesterday !
The entire process went smoothly from order to installation of the windows. Patryk, his team, Mario and Piotr were very helpful and respectful all the time. Thank you
I had my windows replaced by Grabex and they were excellent. The fitters Greg and Michael worked quickly, cleaned up afetr them seves, where informative and very helpful. Matt Paxton who embedded the words of his job title "Logistics & Customer Support Manager" especially customer support. He was very helpful, listen and adviced which was the support I needed. Brilliant company and great Value for money.
I want to thank the whole team at Grabex who have been wonderful. I ordered UPVC sash windows and also a aluminium bifold window and also a aluminium door. The products are of very high quality. And the installation happened much sooner than inspected. Patrick was very polite and hard working and Mario the quality manager inspected the installation and made some minor adjustments. The customer service has also been brilliant and Matt kept me updated through the process from placing my order to installation. I am so pleased with my new windows and doors and would be delighted to recommend Grabex. I will definitely use them again in the future if I have any need to.
Standardly, I’d be quite reluctant to put such a high rating for a supplier as I understand that all engagements/ projects come with challenges.
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!
Grabex is an extraordinary company. Very professional and reliable from the very beginning until the very end.
Their customer service and installers are very good.
We are very pleased with our new windows.
I highly recommend them.
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