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.

Trusted By

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.

James A.
Adam visited our property to advise on noise from a pool plant room that was coming into the house. He advised on the best approach to eliminate the vibration that was being heard. On his advice this has now been resolved. Adam was great to deal with and we would highly recommend his company
Katja K.
The customer service was fantastic with our quotes updated several times to match our requirements. The team that came out were very efficient and stayed late to finish the job in one day without being asked to. The sound proofing is of really high quality and we haven't heard any noises at all from our neighbours since it was installed
Peter D.
I can't praise City Insulation enough they are very professional, informative, courteous and they certainly know their stuff. They completed our lounge and dining room soundproofing in two days, which was completed with great care and respect to our home and furnishings (thanks to a great installation team). Do yourself a favour and choose City Insulation, it's no surprise that they get regular 5 star ratings.
More customer reviews

Ready to get started?

Enquire Now