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10 Year Guarantee

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Made in the UK

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Retaining Traditional Looks With Modern Sliding Sash Windows

The traditional sash windows have been given a modern makeover to perfectly suit contemporary living without losing that authentic look. Our sash windows offer the style and feel of traditional sash windows, with a modern sliding design mechanism. With an effortless sliding design, you can now open and close your sash windows with ease.

Sliding Sash Window Styles to Suit Your Home

At Three Counties, we take great pride in creating windows that perfectly match your home’s style and reflect your personal preferences. Our sliding sash windows are no exception.

Take a look at the range of styles, colours and finishes available to find the best match for your home.

Three Counties - Sash Windows

Add Character and Charm to Your Home

Whether you are looking to update your existing sash windows or you want to add sliding sash windows to your home, you will add some extra charm and character to your home.

uPVC Sliding Sash Windows
Three Counties - uPVC Sliding Sash Windows

Available in a Range of Finishes

Our sliding sash windows are available in a range of finishes and styles so you can choose a design to suit you. If you’re unsure which style of sliding sash window is right for you then one of our experts will be able to talk you through your options and let you know what they recommend.

Sash Window Design Options
Three Counties - Sash Windows Security

High-Security Performance

Our sophisticated locking systems mean that all of our windows offer a high level of security for your home.

Sash Window Security
About Three Counties - Weatherseal Gasket

Tailor Made to Suit You

Our sliding sash windows are made to order meaning you are getting something truly bespoke that will suit your home and your style. Check out our gallery of sash windows

Sash Window Gallery
Three Counties - A-Rated

Strong, Durable and Secure

Our high-quality sliding sash windows are strong, durable and will require a low level of maintenance. They also offer a high level of security.

Sash Window Durability
Three Counties - Sash Windows

The Sliding Sash Windows Collection from Bygone Windows

Here at Three Counties, we take pride in being trusted fitters of Bygone Windows. Bygone Windows is a stylish and pioneering style of sash window, engineered and manufactured in Britain to the highest quality standards.

This high-performing design offers efficient and effective air circulation, which helps reduce the risk of mould and condensation in your home. Additionally, Bygone Windows are known for their high level of security, making them a police-preferred design for added peace of mind.

Furthermore, these windows boast an impressive energy rating, ensuring that your beautiful sliding sash windows are not only stylish but also of the best quality. With Bygone Windows, you can feel confident that you’re investing in windows that offer both aesthetic appeal and exceptional performance.

FAQs When Buying Sliding Sash Windows

What makes sliding sash windows stand out among window styles?

Our sliding sash windows stand out as stunning choices among our window styles, capable of transforming the look and feel of your house. Experience elegance and charm with our beautifully designed sliding sash windows.

How do you achieve authenticity in your sliding sash windows?

Recreating the essence of traditional sash windows is our speciality. From authentic style staff beads to slender proportions and the classic “butt-joint” manufacturing technique, we deliver the finish you desire.

Are sliding sash windows secure and energy efficient?

Absolutely! Besides their beautiful design, our sliding sash windows are engineered to provide the security and energy efficiency that you expect from Three Counties windows. Featuring exclusive deep glazing bars and beads with Krypton gas units, they boast A-rated performance, ensuring exceptional security and energy efficiency.

Warranty and Aftercare

We pride ourselves on providing excellent warranty and aftercare for our sliding sash windows. With a warranty of up to 10 years on all our glazing units, you can have peace of mind knowing that your investment is protected. Our dedicated aftercare team is always ready to assist you with any queries or maintenance needs, ensuring the long-lasting performance and satisfaction of your sash windows.

Looking after your new sliding sash windows

Looking after your new sliding sash windows is easy. Simply clean them with warm soapy water every few months, and lubricate the hinges and locks with a silicone-based lubricant once a year. This will help to keep your windows looking their best and functioning smoothly for many years to come. For more information on how to look after your windows speak to one of our friendly team members.

Aftercare for your new sliding sash windows

We want to ensure that you have the right aftercare information for the products fitted by our Camberley installers and that you know where to call if there are any issues. You can find aftercare guidelines for all products and services below. In addition, we have included details of our various guarantee periods should you ever need to refer back to this.

Three Counties - Installation of the month - May 2019

Installation of Victorian Sliders Sash Windows

In Camberley, We installed uPVC sliding sash windows that beautifully capture the traditional charm of wooden sash windows. Featuring Georgian bars, cam locks, and lift handles, these windows offer an authentic and classic feel.

Three Counties - Installation of the month - May 2019
Three Counties - Installation of the month - May 2019
Three Counties - Installation of the month - May 2019
Three Counties - Installation of the month - May 2019
Three Counties - Installation of the month - May 2019
Three Counties - Installation of the month - May 2019

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    Three Counties - Sash Windows

    The Three Counties Window Installation Process

    We make your new sliding sash windows installation process easy and hassle-free.

    Here are the 12 simple steps we follow to ensure you have the best experience and the perfect windows for your property.


    Our knowledgeable sales team will meet with you to discuss your requirements and provide you with the best possible options for sliding sash windows. They are experts in installing sash windows and will guide you through the entire process, offering valuable insights and advice tailored to your specific needs.


    After understanding your needs, we will provide you with a detailed and transparent quotation. We will carefully assess your requirements to create an evaluation that provides an accurate and itemised quotation, ensuring clarity about the cost of sliding sash windows and allowing you to make an informed decision.


    Once you have confirmed that you want to proceed with us, you become a Three Counties customer! As a valued customer, we’ll keep you fully informed of the progress of the process through to completion.


    Our team will call you to schedule a convenient time to carry out a full survey of your property, ensuring that your sliding sash windows are the perfect fit. During the survey, our surveyors will assess your specific requirements, provide expert advice, and guide you through any options that arise.


    Our surveyor will take accurate measurements and ensure that all details are in order. Their attention to detail when assessing your requirements will provide peace of mind throughout the installation process.


    Once the survey is completed, the information will be passed back to our office for ordering. The ordering process is streamlined to ensure a great customer experience.


    We will keep you updated throughout the process and inform you if we need you to double-check anything on your order. This allows us to address any concerns promptly, ensuring a smooth and hassle-free experience from start to finish.

    Installation Date

    After confirming the delivery of your new sliding sash windows, we will contact you to book an installation date.

    Professional Installation

    On the day of installation, our team of professional installers will arrive at your property promptly at 9 am. They will discuss the order of work and then start installing your new windows. They will ensure a seamless and efficient installation process, minimising any disruptions.

    Completion and Adjustments

    After installation, our installers will take you around your new sash windows to ensure that you are comfortable operating them and make any necessary adjustments. Your satisfaction is our priority.

    Payment and Payment Options

    Payment is due on completion of your installation unless you have chosen our buy now pay later option. Speak to our sales team about our flexible financing plans for spreading the cost of your new sash windows over monthly repayments.

    Certification and Guarantee

    After completion, your installation will be registered with FENSA (where applicable), and you will receive your insurance-backed guarantee and certificates within 6-8 weeks, allowing you to enjoy the benefits of your new sash windows while having complete peace of mind.

    Bonus Step – Enjoy Your New Sliding Sash Windows!


    You can now enjoy your beautiful new, energy-efficient sliding sash windows, whilst saving money on your heating bills!

    Get Your Sliding Sash Windows

    If you are looking for a beautiful, energy-efficient, and low-maintenance way to improve your home, then sliding sash windows are a great option. They can help you save money on your energy bills, increase the value of your home, and enhance the style of your home.

    Contact us today to learn more about our sliding sash windows and to get a free quote.

    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.