Be aware when buying this companies products. They may tell you their doors are fire rated however unless they are installed by a certified installer they do not meet any kind of regulation. Mon... See more
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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
It was a pleasure to deal with Colin and his staff. They were knowledgeable, helpful and deliver a great service for a great price. My windows - uPVC sash - look absolutely fantastic. I couldn't recom... See more
The service was excellent and the windows are of a high quality, I fitted these in my victorian home and it feels much warmer and the design perfectly compliments the building. I would highly recommen... 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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Replied to 75% of negative reviews
Typically replies within 24 hours
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Great service from start to finish
Great service from start to finish. Doors and windows looks great, good quality and good finish. We had a small issue with fitting them but Paul there engineer fixed every detail until they were all perfect.
Very happy with the windows and doors but particularly Paul’s attention to detail.
Sash windows are stunning I have an…
Sash windows are stunning I have an Edwardian home that has had nothing done in so long got the windows from Colin’s the quality is amazing
Also the service from Elena was truly outstanding great customer service great product and it worth waiting for the best
Lisa kania
Airdrie Scotland
Ps delivery man was brilliant took them to my front porch and had men on hand to lift inn thank thank
My mistake.
I would like to thank Colins windows for arranging to rectify an issue, which I was responsible for.
I contacted Paul, at customer service.
Paul delt with the matter personally and he managed to arrange the remanufacture of glazing within 24 hours.
Urien Roberts.
Excellent quality 2 x French Doors in…
Excellent quality 2 x French Doors in aluminium black
Fitted brilliantly by Paul who was great at getting it done professionally and in a timely manner
Very happy
Lorraine
Exceptional quality windows
Exceptional quality windows, we went with run through sash horns and they really set these windows apart.
The attention to detail is great and the fine astragal bars replicate the original timber windows very closely.
Would thoroughly recommend.
Decent honest company to deal with and delivered on time.
I purchased 3 sash so far
I purchased 3 sash so far. I am very happy with the quality and will buy more in future. I just wish the office communicates a bit better and gives a bit more details about the windows they sell and all the options.
Customer service has been truly good when I needed help. Thanks the remote engineer who helped me to understand the new system of springs.
Brilliant service
Highly recomended
Great contact, great prices, fantastic quality! Everything as should be :) I'm very happy. Thanks
Quality windows & customer service!
I am a seasoned property developer and one of my builders has recommended this company for our major 18 windows project several years ago. I have to say that it's been an ultimate blessing that he has, because I never knew you can have these amazing windows, the ones that look so well, and made to such a quality standard at Colin's prices. It's extremely good value and very good quality build. These windows really look and feel and are made like windows that cost 3 times as much.
I have been using this company ever since and I have to credit the girls at the office, who always reply quickly, they always answer the phone, and they are just so in tune with the 21st century and client needs that I can't really recommend them enough. A rare find.
They have gone an extra mile for me over and over again and it's safe to say that I will never look elsewhere. Keep up the good work guys, you've got a great business sense, and a product and the fortune will follow you.
Having recently purchased 12 sash…
Having recently purchased 12 sash windows and 4 sets of french doors, we cannot recommend Colin's Sash Windows highly enough. Ordering online was at first a bit daunting. But the staff have been excellent in answering any questions we have had for them in a prompt and professional manner. Delivery of our windows was also on time, without a hitch. And the after service from Paul has been second to none. We love the way the sash windows have enhanced our house and we would highly recommend this company to all our family and friends.
Exceptional service
The aftercare for customers from Colin's sash windows was something that I just had to comment on. Especially to Paul in the handling of an issue that initially had him scratching his head. His intimate knowledge and experience in every aspect of the products supplied enabled him to diagnose and rectify an issue that was essentially the fault of the builder installing the Heritage doors in my property. Although due to the geographical distance it was not possible for Paul to attend and rectify that issue himself, his support outside of working hours was testament to his professional acumen. Would highly recommend this company.
5 star company, highly recommend
Paul was absolutely amazing. He fixed a very badly fitted window from another company and it was no problem to sort out the issue, he explained what the problems were and refitted the window. I would highly recommend Paul and the team.
What a fantastic company
What a fantastic company. I was nervous about using them, as I couldn't believe the price. However, now my doors have been installed, I can report this company is as good as it seems. Super quality product - our builder couldn't believe the price-and the team at Colin's are fantastically helpful. I don't normally review but I really want to spread the word about this excellent company.
A big, big thank you
A big, big thank you to Paul Taylor at Colin's Sash Windows. One of our sash windows' springs had gone. We got sent replacement springs free of charge and had Paul guide me through every step of the repair process, even getting my wife involved to act the hero at the end! Very patient and dealt outside of normal working hours using video calls to deal hands on. Very quick email responses too. Many thanks again. 👍👍
A company that cares
I’m not one for usually leaving reviews, but thought it was important to acknowledge the lengths the guys at Colin sash windows go to resolve problems.
First and foremost, I want to thank Colin as he sets the tone for the rest of the team to follow, and it shows. They are indeed a company that cares.
Having raised a concern with the company Colin put one of his best guys on the job for me - Paul - who called me outwith business hours and personally assured me that my custom matters and has since put the wheels in motion to resolve issues that were effectively my fault.
Indeed a heartfelt and truly empathetic service - unheard of in a world of faceless transitions - once again, thank you, I am genuinely grateful.
Excellent Service
Excellent Service. Reasonably priced. Good quality. Really helpful local company. Would definitely highly recommend.
We would like to say a massive thanks…
We would like to say a massive thanks to Paul for sorting out our new door.We had them custom made and we are now loving the view. After initial misunderstanding it all got nicely sorted. Paul really did go out of his way and finished everything in the end.
Real sliding sash windows for little more than the cost of standard uPVC casement windows
I first ordered with CSW two years ago, the price, service and quality were all outstanding. I was so impressed that I've now bought the front of the house windows through Colin.
The windows arrived in good order as expected. On this occasion however I had accidentally mismeasured one of the windows 🙄 a costly mistake, or so I thought... Colin's team promptly found a solution. A replacement was ordered and my mistake wasn't so costly after all.
Big thanks to Colin and all the team :-)
THANK GOODNESS FOR COLIN AND PAUL
Having bought my Crittall Doors last September, they have just been finished today. This is through no fault of Colin but the fitters who installed my doors (You really need someone who is experienced in these style of doors).
Colin and especially his troubleshooter, Paul Taylor, have been absolutely amazing, they have made 3 visits to my house even though it’s a four hour trip each way, kept me calm and restored my belief in the human race. My fitters refused to come back after fitting them back to front!!!
Thank you Colin and Paul for helping me beyond the call of duty, and at your own expense. I will be forever grateful and certainly buy any future products from this company.
BY THE WAY, MY DOORS ARE BEAUTIFUL AND GOOD QUALITY.
I am so grateful,I would even be happy for Colin to give out my phone number if anyone would like personal reassurance.

Reply from Colins Sash Windows
Windows
Windows fine. You must know absolutely what you want. No upfront assistance/advice. We didn’t include a sill as thought it was included and they left us waiting for three weeks until I complained and then said our fault. No sill. Happy to take the money though.

Reply from Colins Sash Windows
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