Claim here for FREE Cavity Wall Insulation
Reduce the cost of heating your home with FREE Cavity Wall Insulation (CWI) – it is a very simple process, the wall is simply filled with a thick insulation mixture. This keeps your house warmer and you spend less on heating it.
Approximately a half of the money you spend to heat your home is being lost through an empty cavity wall – this is the greatest single loss and costs you more than any other leakage of heat in your home.
Funding is available for properties with empty cavity walls, and also to top-up walls where the cavity has been partially filled before.
Free Insulation Grant offers FREE cavity wall insulation across England, Scotland and Wales for properties that have a brick cavity wall.
What is a Cavity Wall?
You can quickly check if you have a cavity wall from the brick bonds on this image.
Note: To qualify as a cavity, each brick must be laid length on. If you can see a mixture of length and end bricks then this is a solid wall and not eligible for cavity wall funding. However, solid wall is excellent for other types of thermal insulation.
Why take action today?
- FREE cavity wall insulation (worth up to £1500).
- Significant reductions in energy and heating bills.
- Enjoy a warmer more comfortable home.
- Increase the value of your property.
- New insulation will be maintenance free.
- While government grants are available.
Do I qualify?
As a guide, houses built before 1930 are often solid wall and would not be eligible for cavity wall insulation but can claim a range of other free insulation – see ‘Claim For’ options above. Many houses built between 1982 and 2000 were built with uninsulated cavities. If your property was built after 1995 then it might have been partially insulated and you are probably eligible for a cavity top-up.
You need to receive a GBIS benefit and have an empty brick cavity wall. Click here to see eligible GBIS benefits.
The property should be located in England, Scotland or Wales and be heated by a gas, oil, LPG, electric boiler or electric storage heaters (ESH).
You must be the Homeowner, Landlord or a Private Tenant. Private Tenants must have their Landlord permission. Landlords must have an eligible GBIS Tenant living in the property that requires insulation.
Your property is less than 3 storeys high.
How much can I save?
According to the Energy Saving Trust Cavity Wall Insulation of a detached house can cost anything up to £1500. With GBIS funding you can have Cavity Wall Insulation for free.
In addition, the chart below shows 2025 statistics on average annual energy bills savings according to your house type. Latest figures can be obtained from the Energy Savings Trust.
| Detached house | £300 |
| Semi-detached house | £200 |
| Mid-terraced house | £150 |
| Bungalow | £200 |
