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
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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
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
Company details
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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.
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United Kingdom
- colinssashwindows.co.uk
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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 recommend!
It was a pleasure to deal with Colin…
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 recommend this company highly enough.
Real care is taken to ensure product…
Real care is taken to ensure product and quality is right. The way my difficult delivery was managed only improved my loyalty to this company. Thanks Colin.
Great prices and service
Great prices and service, before, during and after delivery.
Six years ago we purchased thirteen…
Six years ago we purchased thirteen sash windows from Colin's Sash windows.We were delighted with them back when they were installed and we enjoy them just as much now.They are very easy to clean and still in lovely condition.
We recently placed an order for a window for a garage conversion.The staff were very helpful and once again the window looks lovely.Fabulous windows and lovely helpful staff.Many thanks
We had a very disappointing experience…
We had a very disappointing experience with Colin sash windows.
The downstairs windows were supplied after regularity changes and should have included adequate ventilation, but they did not. As a direct result, ventilation in the property was made worse, leading to on going condensation, mould growth, and damage to internal decoration.no accountability, no solution after months of communication they have demonstrated a lack of technical expertise and compliance and no regulatory awareness. Despite escalating this issue to owner Colin & co-owner John Linney, no technical or commercial resolution was offered.
I would strongly caution others to ensure compliance and ventilation are explicitly addressed before proceedings

Reply from Colins Sash Windows
Steel Doors
We’ve had two sets of internal steel doors from Colin’s Sash Windows. Both times the measuring, communications, delivery and install were faultless. We would highly recommend them to anyone who’s considering it.
Great product.great service.will
Great product.great service.will
definitely use you again.
Would highly recommend to anyone.
Best window company I've ever used.Thanks
This is our second order from Colin's
This is our second order from Colin's. Really good quality uPVC sliding sash windows for a very reasonable price. We were able to make so many changes to make them exactly what I wanted. They look fabulous fitted.

Reply from Colins Sash Windows
excellent windows
excellent windows, excellent service, excellent price ! simple :)
Always delivers
Always delivers. If you know what you need, there is no better route to windows online....
An excellent company
An excellent product, very helpful staff and common sense to put together but would be a good idea to get someone with window fitting experience to help definitely a 2 people installation
Great service from the team
Great service from the team, we are really happy with our aluminium French doors they are stunning. We had an issue with one of the doors but customer service sorted this straight away for us. I would recommend them.
Level of customer support was top notch…
Level of customer support was top notch with really speedy replies to all correspondence.
We wanted sash windows that didn’t make…
We wanted sash windows that didn’t make our flat look like a DIY disaster. Colin’s delivered. Easy to measure, easy to order, and they look far more expensive than they were.
Amazing windows
Amazing windows, Amazing service, nothing was too much trouble even though I asked so many questions about my choice options before taking the plunge to buy, I've never installed windows prior to this but it was so easy I can't believe now having installed some that we all pay window companies so much money for a few screws and silicone, I would highly recommended these windows and the brackets and quick release sashes make it so easy.
I had my old sash windows replaced by…
I had my old sash windows replaced by Colin’s Sash Windows and the work was excellent. The team was on time, polite, and very tidy. The new windows look great, fit perfectly, and have made the house much quieter. I’d definitely recommend them to anyone who wants quality work done right.
Avoid at all costs
Avoid at all costs. This was by far the worst experience we’ve ever had. The doors were not as promised, and it took four attempts before the issue was finally resolved and they still are not fully 1.5 years later. The entire process was incredibly stressful, made worse by a sales team and office staff who seemed to lack both product knowledge and any sense of customer care. We were left utterly unimpressed and extremely disappointed.

Reply from Colins Sash Windows
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