Colin’s Sash Windows supplied us with some internal steel Fd. When it come to getting them signed off we were informed they needed to be installed by a certified installer. We asked Colin’s about... See more
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See what reviewers are saying
Great value sash upvc windows. Best price I could find. Friendly competent customer service. Easy to deal with. Lovely fitters. Fitted the windows extremely professionally and fast and cleaned up afte... See more
Ordered Heritage aluminium crittal style windows from Colins Sash Windows (cheaper than other companies) Small issue with beading and tight door handle, spoke to Paul who was really helpful. He... See more
Fantastic experience with Colin's Sash Windows. On hand to help with any questions (to which there were a lot) and really went that extra mile to ensure all measurements and designs were done accurate... See more
Company details
Written by the company
Colin's Sash Windows is best known for disrupting the upvc sash window market in the UK in 2014 by introducing affordable fixed prices for upvc sash windows in the UK. Before this they were generally only available at very high prices through window installers. Today they are market leaders in cheaper alternatives to the renowned steel Crittall® interior and exterior windows and doors.
Contact info
United Kingdom
- colinssashwindows.co.uk
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Absolutely great experience from start…
Absolutely great experience from start to finish.
The office staff was very helpful answering any questions I had.
Also need to add that Paul did a fantastic job installing out heritage french doors, he's a lovely guy willing to help out whether it's advice on the phone or actually installing.
Thanks guy's 👍
Absolutely amazing work
Absolutely amazing work! It was a really tricky fit as our builders had not made the opening the right size. Paul came up with solutions to fix the problem with a smile on his face, he stayed until the job was done. Thank you!! The office team were also great at answering all our questions. Highly recommend. 5 star ⭐️
Great improvement to our french doors
I’m very pleased with our new french doors, which were good value, are well-made and attractive and have eliminated the draughts and condensation with the old doors. The service from Colin’s Sash Windows has been excellent and they provided good technical advice about the installation process and ensuring the correct sizes. There was a minor problem with an adjustable plate, which I had to modify to remove a small gap between the door and the frame. Paul provided guidance on how to adjust the plate to remove the gap, but this was not possible.
Brilliant Windows Brilliant Team
Radina & Paul have been brilliant help in organising the windows for our current project. Replying very quickly and going above and beyond to deliver everything we needed. The windows also look beautiful and are a high quality product. Look forward to working with the team again.
Amazing products, super fast turnaround
Really friendly customer service from initial enquiry at the office to after sales service with their Customer Support Manager, Paul.
Outstanding Customer Support 👏
Customer Support Manager Paul has restored my faith in human nature...I can't thank him enough for all his help and support 🙏
He truly has gone above and beyond trying to help me get all the bits I need to get my windows over the finish line to completion after being left with a half finished job done by a cowboy builder ...
Thank you so very much 👏👏👏👏👏
Bought aluminium industrial style doors…
Bought aluminium industrial style doors from them. Really good quality, service and price
AVOID AT ANY COST OR IF YOU WANT TO BUY…
AVOID AT ANY COST OR IF YOU WANT TO BUY USE CREDIT CARD SO YOU CAN CLAIM MONEY BACK!!!
This company are using a third-party factory to fulfill their orders and have no control over their supplier.
Damaged and faulty windows with a lack of after sales support.
My order of 12 sash windows was delivered by a third party supplier Summer 2022. The windows arrived on Luton van. They were off loaded by hand at the protest of the driver who felt it was my responsibility to unload their vehicle. On inspection of the windows there are around two thirds which have either been damaged in transport or have manufacturing faults. Have had two an appointments arranged to resolve the problems with windows, both appointments were cancelled without a notice. Have had to pay extra £250 for independent window fitter to replace window panes badly marked during production. Despite contacting Colin Sash Windows via email and phone there has been no action to resolve the issues since today.

Reply from Colins Sash Windows
Care Home replacement sash windows
We used Colins Sash for a care home refurbishment project, Didi was very helpful throughout the ordering process and nothing was too much trouble, I couldn't believe how fast delivery was and we were kept informed every step of the way, an excellent service and the quality of the windows is excellent! Would highly recommend!
Super windows/doors
Although a while since installing my windows and doors I have just been back in touch to ask about an additional item.
I had 2 windows and 2 large bi-fold doors (3m and3.5m) They are superb. One glitch with a droopy integral blind(door) was rectified quickly and service excellent.
The quality of both doors and windows is superb and everyone comments on how good they look.
I dealt mainly with Radina who could not have been more helpful and informative.
I have reccomended several of my friends and family and I know that at least 2 orders were placed and they are also very happy.
Quality excellent
Service excellent
Price unmatchable
Thank you
Brenda
Heritage doors…
We had Heritage Style patio doors supplied by Colin’s Sash Windows. The service was great! Delivery really quickly and a competitively priced. The after sales care by Paul was brilliant.
Internal Doors - Terrible customer service
I was really pleased to find this product as it was exactly what we were looking for at an reasonable price however the customer service really lets the company down. I never usually leave reviews like this but once we had placed the order and paid, we did not receive any updates on the order unless I constantly chased up via email and phone calls.
The delivery was then delayed 3 times and I was still not made aware of the delays. I understand with manufactured products there can be delays but the lack of communication is unacceptable.
When I called to ask for updates, I was spoken to very rudely, one of the team sighed down the phone and I was told that I was 'frustrating' them because I asked for a delivery time frame so that I could arrange for someone to be in to accept the delivery.
We have finally received our order and I do not want anything from this review but I need to mention how poor the customer service is and that I have never been spoken to like this before, especially when we have spent that amount of money.
The emails and phone calls were so unprofessional and argumentative. I spoke to Elena, Mila and I did ask to speak to the manager Velina but she was apparently not available for phone calls. This could have easily been avoided and I feel really dissatisfied and I certainly would not recommend this company to anybody.
Quality products and service to Mach. Have been using Collins Sash windows…
Have been using Collins Sash windows for many years now and the product and service is as good today as it was when I first used them. Nothing is to much trouble and the quality is second to none.
First class service!!!
First class service from Paul at Colin-sash windows. He really is the guru of all things to do with doors and windows.
I couldn’t be happier with the level of service, knowledge and skill.
I will most definitely be using them again.
Aluminum heritage windows and doors
We bought a set of aluminum heritage windows and doors and we are really pleased with the quality of the product and the look of them.
The ordering process and defining the specs was pretty straight forward and even though we went back and forth a lot Didi was very helpful with that. Their technical support manager Paul was fantastic and very helpful throughout the whole process. We had some issues with the openings and installation (made by our builder) and Paul was able to come and help with the fitting at an extra cost. He did great job, went out of his way and had a very positive professional attitude which turned a stressful situation into a positive one.
Damaged and faulty windows with a lack of after sales support.
My order of 20 sash windows arrived quickly and was delivered by a third party supplier. The windows arrived on two Luton vans due to their total weight and no larger vehicle being available. They were off loaded by hand at the protest of the drivers who felt it was my responsibility to unload their vehicles. On inspection of the windows there are around two thirds which have either been damaged in transport or have manufacturing faults.
Despite contacting Colin Sash Windows via email there has been no action to resolve the issues after 16 calendar days. This has resulted in having to store these windows and not being able to continue the planned building works. I can only rate my experience with one star as this is causing considerable stress and inconvenience to myself and family over the Christmas holidays. When calling their land line number I'm put through to a third party answering service which will only take messages.

Reply from Colins Sash Windows
Excellent customer service (7 sash windows)
I’ve just received 7 sash windows, the windows are brilliant quality, superior to most upvc sashes I’ve seen. From the outset Paul the customer support manager helped me with all the small and technical details needed. The ordering process was slightly more complicated, with another team, there were a couple of small items missing from the order, despite being worried about this I called them up and one of their team, Didi was very helpful and put me back on to Paul who took it in his stride and sorted it on the same day! Amazing customer service and after sales. Thank you very much. What a great company!
Beware of quote vs. delivery
We have ordered an internal aluminium door acc. to Colin`s Sash windows quotation showing and describing a door with glazing inside.
Unfortunately we got a frame and glazing delivered separately. It was never mentioned glazing has to be inserted by ourselves -neither shown on their quote.
I am in contact with Colin`s Sash Windows to clarify this issue.
Will update the review once the issue is clarified/ corrected.
Reliable and speedy communication…
Reliable and speedy communication throughout the whole process. Vertical sliding sash windows delivered exactly on time. Very obliging staff.
Efficient company with brilliant aftercare support
Ordered three aluminium heritage doors from Colin Sash windows and they have been incredible. They have their own engineer that's available to chat and talk you through anything. My father installed one and completely crucified it, Colin Sash windows helped me order new coupling joints and advised me on the best course of action.
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