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Christmas Closure: We close at 3pm on Thursday 21st December and re-open Tuesday 2nd January at 8am.

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10 Year Guarantee

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Made in the UK

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1000+ Checkatrade Reviews

If you are considering sliding sash windows for your home and you want some expert advice or a free design consultation then call us on 01252 414800 and speak to one of our window experts about your requirements.

Three Counties - Sash Windows

About Sliding Sash Windows

Sliding sash windows can add style and value to your home and are one of the most sought after window styles by homeowners. Take a look at just a few reasons why you should consider sliding sash windows for your home.

Three Counties - uPVC Sliding Sash Windows

Adding Character and Charm

Sliding sash windows can add character and charm to your home – this period detail will add a beautiful finishing touch to the look of your home.

Three Counties - Sash Windows Security

High Security

Our sliding sash windows are police-preferred due to the high level of security they offer. If your old-style sash windows don’t offer the security you desire then consider upgrading to our beautiful secure sash windows.

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Energy Efficient

If you have a character property then chances are your original windows do not offer a high level of energy efficiency. Our double glazed sliding sash windows offer an A-rated level of efficiency – meaning you can enjoy lower energy bills and a warmer home in the winter months.

Three Counties - Sash Windows Joint

Excellent Ventilation

Our high quality sash windows offer fantastic ventilation and can help to reduce the chance of mould and condensation in your home.

Three Counties - Sash Windows

Bespoke Design

Our windows are individually designed to suit your home and your style requirements – so when it comes to the shape, colour and finish of your windows, you can feel safe in the knowledge that your windows are bespoke to you.

Three Counties - Made to Order

Local Experts

At Three Counties we have been designing and fitting windows in Berkshire, Surrey and Hampshire for many years so we are the experts in what styles suit the local area and your local neighbourhood.

Paul Wallis
Paul Wallis
We recently decided to replace our front door, and could not be happier with the result! Thanks so much to Kate, for her time and understanding. Cannot say enough good things about the installation, and Cameron was tidy and efficient. It's been a pleasure to work with Three Counties recently, doors and windows. Many thanks!
Danielle Horsley
Danielle Horsley
Lovely looking door
Agatha W
Agatha W
Three Counties have been superb, their customer service is great and their workman were polite, cleaned up after themselves and the workmanship is excellent!! I am very pleased with their work and would happily recommend them.
Tom Winter
Tom Winter
Excellent service!! We had 21 windows and 3 doors installed and very happy with it all. The process from start to finish was stress free and Ron and Lee who installed the windows and doors were great. Would definitely recommend!
Phil Redhead
Phil Redhead
Just had my tatty old windows replaced by Three Counties, and it’s been a highly professional job from start to finish. Communication from the administration team was prompt and courteous at all times, and installation ended up being much quicker than advertised projections. Installation was without issue and the lads who did the work were amenable to my requirements and did an excellent job. Very happy with the entire process. Three Counties were recommended to me by friends and I can certainly now recommend them to others.
Mark Boyce
Mark Boyce
Bought two new windows and a new front door from Three Counties, was very impressed with the attitude of all staff, who were friendly and informative. Price was good, and installation completed without a hitch - very happy with the final product, and would definitely use again.
Paul Picknett
Paul Picknett
We have just had all our windows (18) replaced, french doors (20 and side panels (2) by Three Counties. We could not be more pleased with their workmanship and the finished product. They left the property incredibly clean after each day, and this despite the messy nature of ripping out old windows and frames. We were kept informed at each stage and a minor snagging issue was resolved promptly and efficiently after installation. A first class service. We would not hesitate to recommend Three Counties.
Anna Trevelyan
Anna Trevelyan
Three Counties have now installed several windows and doors on our house and they're always my go-to company. I used another before I discovered them and they let me down, but I absolutely cannot fault Three Counties. From the moment you contact them they're courteous and professional, and they keep in touch with timescales and installation times. Friendly installers too, who go above and beyond. You'd think all this great service would cost more but they beat other companies on price. Highly recommended and trusted, I'd never go anywhere else now.