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CWI_Grants_Explained

Cavity Wall Insulation Grants Explained

  • Last updated date: September 28, 2024

Written by Kate Hallewell

The UK government offers several schemes, including the Energy Company Obligation (ECO4) and the Great British Insulation Scheme (GBIS), to help households reduce energy bills through cavity wall insulation.

These grants are 100% free for eligible applicants.

Apply for Free Cavity Wall Insulation Grants

Think your home qualifies? Use our Free Grant Checker to find out in under 30 seconds if you’re eligible for a fully funded insulation upgrade.

What is Cavity Wall Insulation?

Cavity wall insulation fills the gap between your home’s external and internal walls, keeping warmth inside during winter. Homes built from the 1930s onwards are likely to benefit the most from this insulation, particularly those without it already installed. If your home was built between 1930 and 1990, you could qualify for a free insulation grant.

Why Install Cavity Wall Insulation?

  • Save up to £455 per year on energy bills for a detached house.
  • Reduce your home’s carbon footprint by up to 1,100kg of CO2 annually.
  • Stop heat from escaping your walls and maintain a cosy home.

Check if you qualify today with our quick and easy Free Grant Checker to see how much you could save.

Types of Cavity Wall Insulation Available

  • Mineral wool
  • Polystyrene beads
  • Polyurethane foam

Our registered installers will select the best material for your home after a survey. Don’t wait—find out now if you qualify for free cavity wall insulation.

Who is Eligible?

Through the ECO4 and GBIS schemes, homes with low EPC ratings or residents receiving certain benefits could get full funding. See if you’re eligible by using our Free Grant Checker.

Common Questions About Grants

Is it really free?
Yes! If you qualify, there’s no cost to you. Start by checking your eligibility here.

How do I apply?
Simply click through to our Free Grant Checker and we’ll walk you through the process in under a minute.

What if I’m not eligible?
New schemes are introduced frequently, so register your details with us and we’ll notify you when new opportunities arise.

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CWI_FAQs

FAQs about Cavity Wall Insulation Grants

Cavity wall insulation is a simple and mess free energy saving measure, but should only be installed by a professional registered installer. The installer will drill holes into the wall of your home, and the insulation is pumped into the cavity.

If there is damp present in your walls, it is best to address it before installing cavity wall insulation. Without a dry space in your wall, the cavity wall insulation may not work as effectively.

 

On average it will take half a day up to 2 days to install cavity wall insulation, depending on the size of your property.

Registered installers will typically provide a guarantee of 25 years for cavity wall insulation, which is supported by Trustmark (who are a government endorsed quality scheme). If you’d like more information on the types of guarantees provided you can visit the Trustmark website.

 

Yes, cavity wall insulation can be installed in a listed building, however you may need to get permission from your local authority first.

 

Absolutely, if you qualify for either an ECO4 or GBIS grant you could be eligible for free government cavity wall insulation grant. Check your eligibility now via our free grant checker and start reducing your heating bill!

 

No, but if you are a private tenant or housing association tenant you will need to get your landlords consent.

 

If done correctly by a registered installer, cavity wall insulation will remain an effective for the life of the building, requiring no further maintenance.

 

Grant rules are changing all the time and new schemes are being introduced. Register your details with us, and we will let you know if any scheme changes impact your eligibility.