The windows look AMAZING and we are very happy. The team we had were brilliant, so tidy and lovely people to have around. Thanks to everyone at Core.

Core supplied and fitted replacement French windows and frame. First impressions, helpfulness and communication were first rate. We would not hesitate to recommend them.

My experience with Core Sash Windows was simply outstanding. I had 5 sash windows refurbished, replacing the sashes with double glaze timber panes but retaining the window boxes. I retained an original feature of the house whilst installing double glazing which is infinitely better than full PVC replacement and cheaper than full timber replacement. The workmanship in the refurbishment of the box was remarkable and the new double glazed sashes are probably the best I have come across. I admit they were not cheap but the quality justifies the expense. The job was completed in May and so good that I decided to replace another 6 windows in the house which is also done to the same high standard. I highly recommend Core Windows.

Despite confidently assuring us that they would make good and leave no trace, their installers didn't clear up after themselves, leaving rubble and dust on the floor for several days at a time, even when they were applying the top coat of paint (which any good painter will tell you is a cardinal sin!) - and leaving their empty drinks cans lying around. They managed to leave scrapes, scratches and dents on walls and woodwork throughout the house, and made such a bad job of touching up / fixing these issues that they had to come back several times and ended up having to repaint several walls in their entirety. On one occasion I turned up to meet their Director at the house and he was hanging out of the window with a hoover, apparently cleaning the gutter. When I came in, I noticed that he had splattered dirty gutter water across half of the walls... cue another few rounds of touch ups... The windows themselves seem pretty good (they are made by a supplier in Estonia I believe) but the final coat of paint was very messy and left drips running down walls, on the skirting boards, radiators etc., so again this was something they had to come back and fix over several visits. Worst of all is that through all of these issues, their customer service was appalling and made the whole process extremely stressful. From not showing up to meetings, to simply being rude and trying to make excuses for things they were clearly at fault for, and now simply ignoring emails.

We had french doors fitted in our Victorian/Edwardian house. Attention to detail was amazing. The doors look like they’ve always been there except much less draughty and rattling! The service we had from Core was very professional. The doors took a while to make but they are so well made it was worth the wait. We were kept informed of progress at every stage and installation was fast and efficient. The guys on site were very professional - incredibly polite and extremely conscientious. All in all it was a very positive experience. Highly recommend them.

We recently had four sash windows replaced by Core Sash Windows. They requested 8-10 weeks to make the windows. As we approached ten weeks, they made no effort to contact us to let us know the windows were delayed. After rescheduling to the 13th week, we received a call at 3pm the Friday before they were due to start on Monday to say they didn't have one window and had no idea when they would have it. Once they started the work, they got three days in and then didn't show up for two days. They refused to answer the phone and never provided a credible plan for completing the job. Once complete (finally), they chased us for payment within 24 hours and continued to chase every day with multiple calls and email over the next few days. They are awful to deal with and I wouldn't recommend them to anyone.

I recently had 7 one-over-one, top and bottom opening, engineered box sash windows fitted by Core Windows. The original site measuring and ordering process was very smooth with detailed breakdown of each window (materials, window furniture, glass, openings mechanism, cills painting and undercoat systems) which was provided a couple of days after the first visit. I opted for a basic fit as I had builders onsite renovating, and this was carried out to a very highly standard. The windows look amazing and are very solid, with decent weight, smooth opening and cut out a lot of external noise. I’ve already had two neighbours enquire where they are from and whether I’d recommend - in answer to that, I would highly recommend Sean, Tim and the team at Core and would not hesitate to use them again should I need to.

Core made and installed 3 sets of French doors for our Edwardian house. We took ages to decide on a supplier as so many door manufacturers only provide off the shelf products which look cheap and insubstantial. We chose Core because they were prepared to make bespoke doors to our specification at a competitive price. We are delighted with the doors now they're installed. They are beautifully made and finished and the design is completely sympathetic to the age of the house. We had dreaded the fitting process, expecting lots of mess and damage to existing decoration (old doors had to be taken out and new frames installed along with new architrave and skirting). We couldn't have been more wrong - the carpenter and painter were incredibly clean and tidy, clearing up any mess before they left each evening. They were professional, friendly and polite and a real credit to the team. The finish is exceptional - they really went the extra mile to make sure everything was perfect and we were happy. There is no need for any further decorating work - they made good all damage to plaster and trim - you really would not be able to tell that the doors are new. We were so happy with the whole experience. In fact it was so incredibly easy and painless we're thinking of replacing the windows now... Thoroughly recommend them.

We were really happy with the service provided throughout. The survey and install team were friendly and polite and everything has been finished to a very good standard. We wouldn’t hesitate to recommend Core Sash to our friends.

I had a new front door made and fitted by Core Sash Windows in June and am very happy with the end product. I'd originally asked them to quote for sash windows over a year ago, so had dealt with some of the staff at that time. Learning from that experience it was important to me to contract a local company this time. I found them professional and helpful to deal with, from the back office all the way through to the workmen installing the end product. The door itself is a quality product which, in my opinion, is good value when I compare it against some other quotes I received. The only area I could pick out for improvement is communication. I found myself calling up or emailing, asking for updates on a few occasions as the lead time was around 12 weeks and installation would likely have been during working time, requiring some planning on my part. Nevertheless customer service gets 4/5, the only area that wasn't 5/5. Happy to recommend Core Sash Windows given my experience.