Achieve high levels of sound insulation with acoustic windows

At Sash Window Conservation, we understand the need for higher levels of sound insulation, whether it be to block out a noisy road, protect the contents of a property or reduce disturbance on a flight path or railway line.

From when you first contact us through to the end of your project, we will work together with you to ensure you achieve the desired acoustic effect, whilst staying true to the heritage aesthetic of the building.

Product Features

Why choose new acoustic windows

How would your project benefit from new acoustic windows?

By choosing to install our new, traditionally crafted acoustic windows, your project will not only benefit from a bespoke design and reduced external sound, but also from other modern features.

Installing new windows will help to reduce energy expenditure, saving money on bills and increasing the security of your project with features such as restrictor bolts and vent locks, with the option to upgrade depending on your individual requirements.

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By installing new acoustic windows, not only will your project receive reduced external noise interference and better insulation. Our new windows include key operated locks and security/safety glass, and we also offer our Sash Secure 240 product for projects that require particularly high levels of security or peace of mind.


Our new acoustic windows are bespoke, ensuring your required sound insulation, aesthetics and day-to-day practicality. In our Kent-based factory, we can also produce full sized samples and models to help with achieving planning permission.


Our products will provide the noise insulation you need and achieve outstanding dB ratings. Our windows are also physically independently tested to BS 717-1 2013 and receive much higher BS EN ISO results than other windows on the market. U-values are as low as 1.2 (W/m2/K), and other glazing options are available.

Our Buying Process

At Sash Window Conservation, we aim to keep the buying process as simple and straightforward as possible, giving you the peace of mind to focus on your project. Read more about how it works below.

Share your goal with us

When you contact us, we will arrange a call to run through your specification and ideas. You can then share any documents or drawings you have of your project, and what you’d like to achieve with the end result.

We will take this and see what we think is realistic and would work best for your project, timescale and budget.

We will then share our thoughts with you and see how they match up with your vision.

landscape image of university of the arts in london using traditional sash windows

We may pay you a visit

We may arrange a visit to ensure that the bespoke design or refurbishment plan that we have in mind will be just right and fit with the rest of the building and its neighbours.

We can then make any necessary adjustments and begin preparing your bespoke quote.

Canal side of Jamie Oliver HQ, Regent's Canal, King's Cross using new windows retaining the traditional sash window aesthetic

Providing your quote

Once your specification and requirements have been agreed upon, we will put together a bespoke quote. This will include a price per window so that you know exactly what you’re paying for, a range of options to ensure you choose the best solution for your needs, together with our own recommendations based on your individual project.

Our quote will also suggest ways in which you could save money, to help you to stay within your agreed budget, whilst getting maximum value from your order.

Society of Antiquaries building using traditional timber sash windows, also showing the arched entrance

Creating your bespoke design

Following your approval of our quote, we will get to work on creating your bespoke design in our Staplehurst factory.

Once our team have created a selection of samples, you will be offered the chance to visit our factory to review them before we go ahead with the final product.

university of the arts in london using traditional sash windows
Black framed authentic sash windows with a timber frame

New acoustic windows made to order

At Sash Window Conservation, we offer a full surveying and reporting service, ensuring all our customers receive expert advice and best value for money. Our traditional craftsmanship means that our new acoustic windows will blend seamlessly with original windows, or perfectly complement a heritage style new build.

All our customers are invited to visit our own joinery factory and team based in Staplehurst, Kent, to approve the design for their product before the final acoustic windows are produced.

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Reducing sound without compromising on appearance

If you’re looking to reduce external noise interference, whilst maintaining integrity to your project’s historic aesthetic, Sash Window Conservation can design a bespoke product to ensure all of your individual needs are met.

Not only will new acoustic windows help to improve sound insulation, but thermal efficiency will also be improved. U-values for our acoustic windows can be as low as 1.2 (W/m2/K) aligning with modern environmental standards, whilst helping to reduce overall energy expenditure and reduce bills. Our products are carefully designed and crafted to imitate traditional designs, and are quality tested to unusually high standards.

Our dedicated team works together alongside architects and main contractors, ensuring our bespoke windows will achieve planning permission and meet London Authority design standards where applicable.

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Acoustic windows on St James' Front

Case Studies

See how our bespoke heritage products have enhanced previous projects with testimonials from our valued customers below.

Who we’ve worked with