***Northern team fully booked until September 2026. If you're happy to wait, please enquire below. London team has a 2 week lead time. Thank you.***
***Northern team fully booked until September 2026. If you're happy to wait, please enquire below. London team has a 2 week lead time. Thank you.***

Domestic

Thermal

  • Improve thermal insulation of existing windows by up to 65%
  • Solutions to fit any size and shape of window
  • Improve your EPC rating

As an extra layer of insulation, secondary glazing helps to minimise heat loss and heat gain through windows, resulting in reduced energy consumption and increased thermal comfort. This means stable temperatures throughout rooms all year round, staying warm in the winter and cool in the summer.

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

Reducing the transfer of heat

Secondary glazing acts as a protective shield against heat transfer by adding an extra layer of insulation to existing windows. The air gap between the original window and the secondary glazing unit creates a buffer zone that reduces heat transfer through conduction and convection. This prevents heat loss during colder months and heat gain during warmer periods, improving the overall thermal performance of the building.

Keep the warm in and the cold out

One of the primary benefits of secondary glazing is its ability to minimise heat loss through windows. As an additional barrier, secondary glazing prevents warm air from escaping and cold air from entering your home. That means lower temperature settings in winter, lower energy consumption, and lower bills. A more stable indoor temperature gives you and your family optimal comfort right throughout the year.

Reflecting the sun’s heat

Secondary glazing plays a significant role in reducing solar heat gain. When combined with low-emissivity glass coatings or solar control films, it also helps to reflect a significant portion of the sun’s heat, preventing it from entering the house. This reduces the need for air conditioning or electric fans, resulting in energy savings and a reduced environmental impact.

City Insultation’s secondary glazing expertise brings a range of thermal benefits for homeowners of all size properties – from flats to mansions. Our secondary glazing adds a critical layer of insulation, reduces heat loss and heat gain, and improves comfort with steady temperature control. Over the course of a single year it can also help drive significant savings on energy bills.

Our Process
Our Process
Our Process

Our Process

TESTIMONIALS

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

Excellent
5.0
Mark
4 weeks ago
The work carried out by Mani and Mark was excellent. Very clean and very knowledgable about soundproofing. They haven't just whacked up a stud wall and shoved it with insulation.... this is a proper company doing a proper soundproofing job. We had multiple layers that I asked for and it has done the trick. Granted our neighbour wasn't very loud, but we are future proofing for is she moves out. We could hear the neighbour doing general day tasks which is absolutely fine... but if she moved out and a family moved in with a young child or a kid they stayed up late watching TV... we would lose sleep. We haven't heard our neighbour at all since the walls have gone up. (2 rooms done) Put it this way, I can't fault the work, price and result. Thank you.
Laura M.
3 months ago
Eva D.
4 months ago
I can highly recommend City Insulation with whatever you need done . Adam and Mani spend 3 days insulating my very high and awkward party wall . I have honestly never seen any tradesmen in the UK work this hard and precise . There were many unforeseen annoying problems as they went along but they found a solution for every one of them. They take pride in their work , are highly skilled and , above all , are tidy , respectful and clear in their communication . I would 100% call on them again should I need anything else done. Thank you both again so much .
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***Northern team fully booked until September 2026. If you're happy to wait, please enquire below. London team has a 2 week lead time. Thank you.***