Significantly reduce your energy bills with internal wall insulation.

By filling in any gaps or holes on your home’s walls, you can create an effective way of keeping heat from escaping through the cavity. This will not only help save money and energy but also make it more comfortable for you and your family.

Some of the benefits of internal wall insulation include:

  • Keeps your home warm in the winter and cool in the summer

  • Reduces your carbon footprint

  • Save you money on energy bills

  • Improve living environment which is vital for healthy and happy lifestyles

Get a break on your taxes when you make an investment in energy efficiency.

The government has announced that there will be a 0% VAT for insulation and renewable measures. This means homeowners can save money on their energy bills while also getting access to free tax cuts until 2027! Inquire about loft insulation, internal walls insulation and room in a roof insulation today.

The Numbers

Here’s how much a typical installation could cost you, how much you could save on your energy bill (£/year) as well as how many kilograms of CO2 emissions you could save each year by insulating an uninsulated loft with 270mm of loft insulation:

Indoor Wall Insulation Eligibility

To be eligible you must:

To be eligible you must own or rent your home and be in receipt of a qualifying benefit.

Our 3 Step Hassle Free Process:

  1. If you think you qualify for 100% cost covered ECO4 grants, simply fill in our form and a member of our team will be in touch within 24 hours to discuss your requirements.
  2. Once we have confirmed your eligibility we will arrange for an approved energy surveyor to assess your property free of charge.
  3. We will then submit your grant qualification on your behalf and arrange for work to begin on your property within 14 days. That’s it – you get a warmer home and lower bills!

Frequently Asked Questions

Yes. Fully Funded ECO4 indoor wall Insulation Grants (IWI)!

For properties with solid walls, thousands of pounds worth of grant funding is available for homes to have internal wall insulation installed, helping you to dramatically reduce fuel bills and create a warmer, more energy efficient home. There are also grants through the Great British Insulation Scheme.

Learn more about grants & funding here.

Internal wall insulation is the insulation of the internal surface of the external walls, so it is a great alternative to external wall insulation and in our opinion a better measure for properties with good character.

Nearly half of all heat loss from solid walled properties occurs by heat escaping through the walls. Insulating these walls will slow down the rate of heat loss and keep the warmth inside your home for longer. Internal wall insulation works by adding an extra layer of insulation to the internal walls and can really improve the standard of finish in your property.

Our internal wall insulation is installed by mechanically fixing and glueing insulated PIR boards onto existing walls within your property.


Insulation, all our work is finished to the highest of standards and provides you with a 25 year guarantee.

  • n=Nest Wales

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Ready to take control of your energy bills?

Find out which schemes and grants you are eligible for.