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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.

    Kate Hulbert
    Kate Hulbert
    Was looking for a new front door, to replace our tragically 80's monstrosity. The Three Counties website was great as i could see and design the door i wanted and then get a quote for it. The sales team was really quick to respond, and not at all pushy. A survey was easily arranged, to confirm sizes etc and the installer turned up precisely on time, was super friendly, efficient, neat and very tidy. Whole process took about 4 weeks, beginning to end, and I now have the door of my dreams! The only downside is my neighbors keep pestering me for details of who did the job. No hesitation in recommending Three Counties.
    Nikki Wade
    Nikki Wade
    I'm very happy with my new conservatory - Mark and David did a brilliant job of the build and resolved any issues I had to make sure everything was finished to a really high standard.
    Dominic Blood
    Dominic Blood
    This is the second time I have used Three Counties , a few years later and in a different house this time. It’s great to see the quality of the windows and workmanship have remained 5*. A stress free installation from start to finish, all windows installed have transformed how our 70s style house looks and now no worries of mould as a result of the old timber framed windows. The Installers who completed our job were amazing, and I mean amazing! Hard working, extremely skilful at their trade, polite and very tidy. Each day when they left they hovered up and left the place in the best condition they could. The whole process from the initial quote , measurements and dealing with the office team before and after the installation has been a true pleasure , if only all businesses were as efficient as this. Highly recommended for anyone considering new windows or any other products they provide and I won’t hesitate to use them again. Thank you Three counties!
    Kim Stevens
    Kim Stevens
    I shopped around and three counties came in at the most reasonably priced, and I used the buy now pay later option. Really happy with my new door and window, which were both fitted in one afternoon. The customer service was very good throughout and everything went smoothly.
    I had some windows fitted a few years ago and have recently had a problem with one of the locking mechanism failing. I called 3 Counties, who had a base call out charge, where a lovely lady took my details, refered to my file and we agreed a date when the fitter would come out and inspect the issue. Paul arrived bang on time and was very helpful. He checked the window, confirmsd the issue and promptly fixed it there and then with a replacement part he had on board his van. He was polite and knowledgable. Very efficient. Thank you 3 Counties.
    samie dowling
    samie dowling
    I had new windows fitted and they look amazing, make such a difference. House is much warmer and soundproof! Staff were very professional, done the job so quickly and cleaned up after. Would definitely recommend.
    Ywain Martin
    Ywain Martin
    Excellent service throughout the process. Very happy
    Victoria Stone
    Victoria Stone
    Very happy with our new windows. Fitters were respectful and tidy. From start to finish. Thanks again.
    Tom 888
    Tom 888
    Paul fitted my secondary glazing and was incredibly helpful and professional. Could not have asked for a better service. Only took 1.5 hours as well. Wait time was a little long for fitting but I guess this is due to demand. Highly recommend. Tom