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Double Glazing Harpenden

Upgrade your Harpenden home with our range of double glazing solutions. We offer a range of windows, doors, conservatories and CLIC blinds, all of which are adaptable to your home improvement project.

We only install premium quality double glazing into Harpenden homes. Our double glazing comes with a range of functional and aesthetic benefits, making them a fantastic investment for any home in the area.

Use our online quoting engine to get a price tailored to your home improvement project. If you have any further questions, please do not hesitate to contact our team today.


Double Glazing Styles


We offer a broad array of attractive and high performance double glazed windows for homeowners in the Harpenden area. Whether you are working on a modern home or a heritage property, our double glazing can transform the way a space looks and performs. We also offer triple glazing upgrades if you want enhanced thermal efficiency.

These uPVC, aluminium and timber windows are also highly secure. You can install them into your home without losing sleep about the security of your loved ones and belongings. These windows are available in a selection of colour and glass options, ensuring they seamlessly blend into your existing property.


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Whether you are looking to replace your front or back door, we offer a range of double glazed door styles to suit your home improvement requirements. Our entire range of doors comes double glazed as standard, protecting your Harpenden home from the outside world.

We supply and install a diverse selection of premium uPVC, composite and aluminium doors for homeowners throughout Harpenden and the surrounding areas. No matter the material used, you can enjoy industry leading levels of energy efficiency, security and robustness. These double glazed solutions have been crafted with longevity and visual appeal in mind.



Whether you have a growing family or a change in work situation, we can help you expand your Harpenden home. We offer a range of house extensions, conservatories and orangeries that deliver in both looks and performance.

No matter the style you choose, how you customise it and the size of your home improvement project, you can enjoy a versatile new space. All of our extensions are made to measure, tailored to your existing and space and personal preferences.

Open up the new space with expansive panels of double glazing like an aluminium bi-folding door. Add as many windows and doors as you like, getting the perfect space for your home. Get in touch with us today for more information on expanding your property.

Thermally Efficient

Our double glazing has been crafted with thermal efficiency in mind. With the cost of living on the rise, it’s important that anything installed into your home is energy efficient. Improve your home’s insulation and enjoy a consistently comfortable space all year round.

In cold winters, you may rely less on your central heating, which could lead to lower energy bills and a minimised carbon footprint. Enjoy a comfortable space all year round when you invest in our double glazing.


We understand how important it is to live in a highly secure home, which is why all our products are double glazed as standard. All of our double glazing products will not only achieve unrivalled levels of energy efficiency, but they will maximise the security in your home. Put your trust in a double glazing installer that will enhance your home with high quality locking mechanisms.

Why Choose Insulating Windows?

Insulating Windows have been designing, supplying and installing premium double glazing into homes in your local area for over three decades. We put our customers at the heart of everything we do, tailoring our double glazing to your home improvement installation.

We have been approved by Which? Trusted Traders and Hertfordshire Trading Standards, so you can feel confident in our double glazing, our installation services and our prices.



Double Glazing Prices Harpenden

Use our innovative online quoting engine to get a free price tailored to your specifications and preferences. Simply input your details and this costing tool will do to hard work and generate a bespoke price.

Alternatively, if you would like to know more about our double glazing, please get in touch with us today. Use our online contact form or call us on 01442 230 376. Our team will be happy to help you with your next double glazing product, talk you through our customisation options and help you get the best installation for your home.

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