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What is a casement window?

A casement window is traditionally one with a hinged sash that opens out like a door. However there are other options for your casement windows and you can choose to instead opt for side-hung, top-hung or even bottom-hung.

As our most popular window choice, these windows are known for their unbeatable combination of efficiency, durability, and affordable pricing. With their exceptional versatility, you can customise them to suit your style with a wide range of colours and finishes. Experience the ultimate in performance and aesthetics with our uPVC casement windows.

Three Counties windows, conservatories and glass extensions come in a range of colours and styles, including Foiled White, Cream, Slate Grey, Dark Grey, Black, Chartwell Green, Irish Oak, Golden Oak, Rosewood and Mahogony.

Range of Colours & Finishes

Our uPVC casement windows are perfect for Camberley homes. They are available in a range of styles, sizes, and colours to suit any taste.

Whether you’re looking for traditional or contemporary styling, we have the perfect windows for you.

Coloured Windows
Three Counties - High Acoustic Performance

High Acoustic Performance

Our casement windows are designed to provide high acoustic performance so that you can enjoy peaceful serenity indoors. Whether you live in a busy area of Camberley or just want to block out the noise, our windows will help you create a more harmonious home environment.

With our casement windows, you can relax, focus, and truly unwind in the comfort of your own space.

Three Counties - A-Rated

A-rated Energy Efficiency

Our uPVC casement windows are rated A for energy efficiency, meaning they can help you reduce your heating bills and keep your home warm in the winter. Because these windows offer excellent thermal insulation properties, they will help keep the interior of your home comfortable all year round.

If you are looking for energy-efficient windows for your Camberley home, then uPVC casement windows are a great option. They are stylish and efficient and can help you save money on your energy bills.

Three Counties - Low Maintenance Frames

Low Maintenance uPVC Frames

uPVC casement windows are made from Unplasticized Polyvinyl Chloride (uPVC), which is a durable and low-maintenance material.

Unlike wooden frames, uPVC requires virtually no maintenance – meaning they will continue to look fresh and new for many years.

Three Counties - High Security Performance

High-Security Performance

Our sophisticated locking systems mean that all of our windows offer a high level of security for your home, ensuring peace of mind and protecting your loved ones from potential intruders or unauthorized access to your property.

With robust materials and rigorous testing, our windows provide a reliable barrier, giving you the confidence to feel safe and secure within your own space.

About Three Counties - Weatherseal Gasket

The World’s Best Weatherseal Gasket

The World’s Best Weatherseal Gasket – Our weatherseal gasket plays an essential part in ensuring your windows stand up to even the most extreme weather.

With its durable design and advanced sealing technology, it provides excellent protection against wind, rain, and drafts, keeping your home comfortable and energy-efficient.

Three Counties - Made to Order

Made to Order in Camberley

All of our uPVC casement windows are made to order to your exact specification, meaning you are creating a truly bespoke product.

Our team meticulously tailor each window to ensure precise measurements and seamless integration with your Camberley home’s aesthetic, delivering windows that enhance both the beauty and functionality of your living space.

Three Counties - Triple Glazing Benefits

Triple Glazing Available

As well as a double glazing option, you can also choose our maximum-performance triple glazing for your new uPVC casement windows.

Three Counties - 1- Year Guarantee

Free Comprehensive Guarantee

We offer a free comprehensive guarantee on all of our windows, doors and conservatories. This means that you can be confident that your windows will be protected for many years to come.

Need advice with choosing the right casement windows?

If you’re feeling unsure about which style to choose then our friendly team have more than 10 years of experience fitting windows in Surrey, Berkshire and Hampshire and will be able to give you all the information you need to make an informed choice about which style is right for you.

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FAQs about uPVC composite windows

What are the benefits of UPVC casement windows?

UPVC casement windows offer a number of benefits, including durability, low-maintenance, energy efficiency, security, and easy cleaning.

What are the different types of UPVC casement windows that you offer?

We offer a wide range of UPVC casement windows, including single-hung, double-hung, casement, tilt-and-turn, and awning windows.

What is the installation process for UPVC casement windows?

The installation process for uPVC casement windows is relatively simple and can usually be completed in a few days, once the start date has been agreed.

What are the warranty terms for your UPVC casement windows?

We offer a comprehensive warranty on our uPVC casement windows, which covers both materials and workmanship. Find our more below.

Warranty and Aftercare

At Three Counties, we pride ourselves on providing excellent warranty and aftercare for our uPVC Casement 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 in Camberley is always ready to assist you with any queries or maintenance needs, ensuring the long-lasting performance and satisfaction of your windows.

Looking after your new uPVC casement windows

Looking after your new uPVC casement 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 uPVC casement 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 - January 2019

Installation of Casement Windows, in Camberley

This home was installed with casement windows, along with a composite front door and French doors.

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

View the installation

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    Three Counties installation of upvc windows and french doors in Pocock

    The Three Counties Window Installation Process

    We make the window installation process easy and hassle-free.

    Here are the 12 simple steps we follow to ensure that 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 uPVC Casement Windows. They are experts in the field of double glazing 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 uPVC casement 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 uPVC casement 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 uPVC casement 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 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 where you can enjoy your new windows and spread the cost over manageable monthly payments.

    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 windows while having complete peace of mind.

    Bonus Step – Enjoy


    You can now enjoy your beautiful new windows and start saving money on your heating bills!

    Order Your uPVC Casement Windows

    With our made-to-order uPVC casement windows, you can rest assured that you’re getting excellent quality windows that enhance the look and value of your home. Get in touch to book a consultation or visit our Camberley showroom.

    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.