Replacement Double Glazing Windows - Three Counties Ltd 0%APR
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0% Deposit and Finance

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10 Year Guarantee

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Made in the UK

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1250+ Checkatrade Reviews

Are you looking for energy-efficient, stylish, and secure double-glazing windows?

Look no further than Three Counties. We are a family-owned and operated business with over 15 years of experience in the double-glazing industry. We offer a wide range of double-glazing windows to suit all budgets and needs.

Our double-glazing windows are made from high-quality materials and are built to last. They are also energy-efficient, meaning they can help you save money on your energy bills. In addition, our double-glazing windows are stylish and secure, giving you peace of mind knowing that your home is protected.

Windows Styles

From classic to contemporary, we offer a wide range of windows in various colours, materials, and finishes. Explore our windows and transform your living space with windows that match your preferences, needs, and the style of your home.

Three Counties - uPVC Casement Windows

uPVC Casement Windows

A popular choice if windows for homeowners who want energy-efficient, secure, and durable windows. They are available in a variety of styles and colours.

uPVC Casement Windows
Three Counties - uPVC Sliding Sash Windows

uPVC Sliding Sash Windows

A classic choice for homeowners who want to add style and elegance to their home. They’re also very energy efficient and can help to reduce heating and cooling costs.

uPVC Sliding Sash Windows
Three Counties - uPVC Bay and Bow Windows

uPVC Bay & Bow Windows

uPVC bay and bow windows give the feel of a traditional wooden bay window and are a beautiful choice for adding lots of light to your home.

uPvc Bay & Bow Windows
Tilt and Turn uPVC windows by Three Counties

uPVC Tilt & Turn Windows

These versatile, secure, and energy-efficient windows offer a range of opening and ventilation options, making them perfect for any home.

uPVC Tilt and Turn Windows
Three Counties - uPVC Flush Casement Windows

uPVC Flush Casement Windows

These windows are sleek, modern, and energy-efficient. The main appeal of flush casement windows is their clean lines and smooth finish.

uPVC Flush Casement Windows
Grey aluminium windows by Three Counties

Aluminium Windows

Aluminium windows are durable, energy-efficient and low-maintenance. They will last for years to come add value to your home.

Aluminium Windows
Three Counties - Timber Alternative Windows

Timber Alternative Windows

An affordable alternative to traditional timber windows, with the added benefits of energy efficiency, durability, and low maintenance.

Timber Alternative Windows
Cross-section of triple glazing windows, by Three Counties

Triple Glazing Windows

Triple glazing provides an extra layer of insulation to help keep your home warmer in winter and cooler in summer, whilst also reducing noise pollution.

Triple Glazing Windows
Coloured windows by Three Counties

Coloured Windows

Let your personality shine through with our coloured windows. Choose from a wide range of colours to create a unique and stylish look for your home.

Coloured Windows
A person relaxing on a sofa with an out of focus window in the background. Implying he's taken noise reduction measures to improve the noice pollution levels in doors

Upgrade your home with new windows from Three Counties. Our windows are stylish, energy efficient and low maintenance, so you can enjoy them for years to come.

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FAQs About Three Counties Windows

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Warranty and Aftercare

At Three Counties we are committed to providing excellent warranty and aftercare for our replacement windows. Our glazing unit warranty of up to 10 years ensures that your investment is protected, and our dedicated aftercare team is always available to help with any questions or maintenance needs. This means that you can be confident that your windows will perform well for many years to come.

Looking after your new windows

Maintaining your new replacement windows is simple. 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 keep your windows looking their best and operating smoothly for many years to come. If you have any questions about how to care for your windows, please don’t hesitate to contact our team.

Aftercare for your new windows

If you have any questions or concerns about your new replacement windows, please do not hesitate to contact our aftercare team. We are always happy to help and ensure that your windows are performing at their best.

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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 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 replacement windows. They are experts in 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 replacement windows and allowing you to make an informed decision.


Once you’ve confirmed that you want to proceed with us, you’ll become a Three Counties customer! As a valued customer, we will keep you informed of the rest 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 replacement 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 replacement 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 outline with you the order of work, then start installing your new windows! They will ensure a seamless and efficient installation process, minimising any disruptions to you and your family.

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 Your New Windows!


You can now enjoy your beautiful new windows and hopefully, you’ll also see some savings on your heating bills!

Need  Help Choosing Your New Windows?

If you’re not sure which windows are best for your home why not get in touch and speak to one of our specialists? We can help you assess your needs and recommend the perfect windows for your home. We also offer a free consultation, so you can get all your questions answered without any obligation.

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