Secondary Glazing

  • Up to an 80% reduction in
  • Improve thermal insulation of existing windows by up to 65%
  • Improve security with internal access only

As people increasingly seek solace from the noise of modern-day life, soundproof secondary glazing windows have grown in popularity, as yet another effective solution for banishing external noise.

As well as helping to maintain a sense of quiet, calm and good communications, they can also eradicate drafts and keep the heat at bay on a hot summer’s day.

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Here are just a few ways we can City insulation can help

Combatting all kinds of noise

Secondary glazing is designed to combat a wide variety of noise sources, such as overhead aircraft and traffic sounds, bustling bar noise, dogs barking, and just the everyday hum of cities and towns. Frames are available in over 200 colours, allowing you to choose a design that fully matches your home interior décor.

Reducing unwanted noise by up to 80%

City Insulation soundproof windows make a significant difference in creating a serene environment within a room. This can mean as much as 80% of noise that currently comes in via windows being eliminated.

Fully custom-made for you

Our secondary glazing windows are custom-made to fit any shape and size, ensuring a seamless integration with your existing primary windows. Once your bespoke units are manufactured, our experienced team of fitters install them utilizing highly-efficient installation techniques.

A unique laminate layer

To achieve exceptional sound insulation, our secondary glazing units incorporate a unique PVB laminate layer between two panes of glass. This layer is integral to sound reduction, providing a barrier against external noise.

Improved home security

As well as the soundproofing benefits of these discreet, robust units, secondary glazing adds an extra layer of protection to your property, enhancing the safety of your home, giving you peace of mind.


With up to 65% reduction in heat loss, secondary glazing windows help to insulate your home and reduce energy consumption – critical in these times of burgeoning home energy bills. By keeping your home cosy and comfortable, City Insulation can help you make substantial savings on your heating bills.

Enquiring about our soundproof windows is a straightforward process with City Insulation. Simply measure the height and width of your windows in centimetres and take a few photos. If you have doubts or questions, give us a call and our team will guide you through the process. Complete the enquiry form on our website with as many details as possible, and we will provide you with a price. If you are satisfied with the pricing, our glazing team will visit your premises to take precise measurements, ensuring a perfect fit for your secondary glazing units.


Don’t just take our word for it. Read what our satisfied customers have to say.

Liam S.
Great experience start to finish - quickly came round and quoted, providing confidence in what they would do and who would be involved, co-ordinated all the individual workers who worked to a high standard. The work itself was done to a high quality and on-time, and the difference has been amazing - great company, would highly recommend.
Don T.
We are all absolutely delighted with City Insulation and the work they have just completed at my brother's house in Liverpool. Sadly my brother is living with alzheimers now and he does have some noisy outbursts now and again, which is natural for this horrible illness. He is being cared for 24/7 in a normal semi-detached house in Liverpool however his neighbours are not normal and keep complaining and putting in complaints to the police / council etc. I found Adam/City Insulation on the internet and he was so understanding and came up with exactly the right solution. All the carers in... the house are delighted and its made their job easier as they no longer worry about the next door neighbours who have got to find something else to complain about now! A big thanks to Adam and his team and if you have any noise issues etc you now know who to contact! (Ps very clean, very quick job, great value for money)read more
George Q.
Best experience I've had with any tradesman to be honest. We needed to improve soundproofing in commercial meeting rooms/studios and he laid out the different options very clearly so we could make the best decision from a range of budgets. His team were extremely professional, delivered the work exactly when they said they would with zero delays. Very friendly and flexible with everything onsite. Would thoroughly recommend.
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