Cavity wall insulation grants explained

Making your home more comfortable and energy efficient begins with insulation. With the ECO4 scheme that includes insulation grants, the team at UK Energy Support can insulate your walls and room in roof to cut your heating expenses and help reduce heat loss.

You can apply for a free cavity wall insulation government grant in line with the building regulations for the property, if you are eligible (see the list of qualifying benefits below) and you own or rent a home.

Cavity Wall Insulation Grants Applications are now open for: June 2022

Check if you qualify for cavity wall insulation grants!

You’re likely to qualify for grants for cavity wall insulation if:

  • You Are a Homeowner or a Private Tenant*
  • Receive Qualifying Benefits
  • Have a low EPC rating on your house

*Please note that housing association tenants are not applicable for this grant through UK Energy Support.

If you are a tenant of a private landlord, you will need permission from your landlord before you can make any changes to your cavity walls.

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Step 1

Use the eligibility checker below to determine if you are eligible for the cavity wall insulation grants

ECO3 Scheme Landlord applicant

Step 2

A member of our Energy Advisor team will contact you to schedule a survey

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Step 3

Upon successful completion of your survey we will arrange an installation appointment

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Step 4

Get a lower energy bill and relax in your improved, energy-efficient home!

eco4 government grant scheme

Is there a government grant for cavity wall insulation?


Through the Energy Company Obligation (ECO) scheme, it is possible for individuals on certain benefits to receive energy saving heating measures such as cavity wall and loft insulation grants for free, with all initial cost being fulfilled by funding.

This includes cavity wall insulation grants, roof insulation and free loft insulation as well as energy saving electric heaters. UKES specialises in the installation of all of these options.

The ECO scheme aims to lower the amount of fuel poverty in the UK with support from the largest energy companies in the sector.

Through other installers you might also qualify for a new boiler grant to replace an inefficient boiler and other energy efficiency methods, such as solar panels, depending upon what you need.

Find out more about free cavity insulation grants.

How do I qualify for free wall insulation grants?

If you receive particular benefits or have a low Energy Performance Certificate (EPC) on your home, you are more likely to qualify for free cavity wall insulation.

How do I apply for ECO grant for cavity wall insulation?

To apply for the wall cavity insulation grant you need to start with checking your eligibility for the ECO4 scheme!

Thanks to our simplified application system, you can check your eligibility and apply at the same time without it taking longer than a few minutes.

Our aim is to get back to you within a week for a survey, meaning the process will move quickly and you won’t be left waiting for a solution.

Which income-related benefits and tax credits qualify for cavity wall insulation grants?

Thanks to funding from the government and their ECO scheme, we can offer free cavity wall insulation grants to the following people on benefits and tax credits:

Cavity Wall Grant Qualifying Benefits

  • Child Tax Credits (CTC)
  • Working Tax Credit (WTC)
  • Pension Credit Guarantee Credit
  • Pension Credit Savings Credit
  • Universal Credit (UC)
  • Child Benefits
  • Housing Benefit
  • Income-based Jobseekers Allowance (JSA)
  • Income-related Employment & Support Allowance (ESA)
  • Income Support (IS)
  • Warm Home Discount Scheme Rebate

What else should I know?

This free insulation grant can be used to fund the cost of installing and materials for cavity wall insulation.

Previous benefits covered by this scheme (such as Disability Living Allowance) are no longer eligible, though you may be able to get support from your local council or energy supplier.

How much does cavity wall insulation cost?

With the ECO scheme, cavity wall insulation installation will have no cost to you.

This is because all the funding comes from the government and large energy companies as they fulfill the Energy Company Obligation (ECO). Find out more about EON cavity wall insulation and British Gas cavity wall insulation funded from the ECO grant, if they are your energy suppliers.

It was decided in 2020 that all the main energy suppliers must help to lower carbon emissions across the UK and support the most vulnerable of their customers to pay energy efficient heating bills and offer free grants for low income families.

Without ECO, the typical cost of cavity wall insulation is around £1,200-1,500, according to the Energy Saving Trust.

It is considered best to install cavity wall insulation alongside other energy efficiency measures, such as loft insulation; if only to save you extra money and time.

Can you get a grant for cavity wall insulation?

Absolutely, especially if you don’t already have free cavity wall insulation in your home.

As the Carbon Saving Obligation aims to cut down on energy bill costs, the entire cost of this cavity wall insulation grant will be covered by the large energy providers.

With cavity wall insulation grants, UK energy costs should be more manageable as well as more energy efficient, fulfilling the government’s aim to have the UK carbon footprint to be neutral by 2050.

What is cavity wall insulation?

Cavity wall insulation is used to fill the spaces between internal walls and external walls, preventing warm air from escaping and allowing you to keep your energy bills low.

It can help to improve your home’s energy efficiency, which can also raise your property’s value if you ever decide to sell.

For low income households, cavity wall insulation can help to keep your heating bills affordable without the cost of installation being up to you.

Solid walls with cavity insulation fitted will not need to be refilled or altered, as the majority of cavity insulation lasts for the minimum of twenty-five years.

Unfilled cavity walls, by comparison, can lead to damp, mildew and other issues caused by cold air freely circulating through the external walls of your home.

Homes that are in the direct path of wind driven rain may require more wall insulation to be fitted, as this can break down the bricks faster and allow more heat escaping to happen.

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What is cavity wall insulation made of?

Cavity wall insulation is typically made up of shredded mineral wool, polystyrene beads and glass fibre, though this will depend on the kind your installer uses.

You can either install internal wall insulation or external wall insulation depending upon what your cavity walls are like and how exposed the outer wall is to weather.

UKES recommends Earthwool as our preferred form of insulation.

How is cavity wall insulation installed?

If you have inefficient insulation and qualify for its replacement we will start with cavity wall insulation removal before we install new one.

You might think that the installation of cavity wall insulation is disruptive but it isn’t! This is because it’s a simple process of drilling specific holes in your outer wall and filling the space with at least two layers of solid wall insulation.

The whole process does not take long and will prevent heat escaping from your cavity walls going forward. 

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This is a government backed scheme

How to apply for cavity wall insulation grant?

To apply for cavity wall insulation grants, there are four simple steps. These include:

  • Check that you fit the eligibility criteria for qualifying benefits on our website
  • Apply for the ECO scheme via our two-minute application
  • Schedule a survey with us as your approved installer
  • Save money on your energy bills after cavity wall insulation installed

Don't wait! Apply Now!

Providing cavity wall insulation grants for low-income families is the focus of our UKES team. We’re eager to help you save on your heating bills! Apply for available cavity wall insulation grants today!