Free Cavity Wall Insulation
If your home has cavity walls and poor energy efficiency, you could qualify for free insulation under the UK Government’s ECO4 or GBIS schemes.
Check if You Qualify for Free Cavity Wall Insulation
Cavity Wall Insulation Grants
What is Cavity Wall Insulation?
Cavity wall insulation is a simple and highly effective way to prevent heat loss from your home. It involves filling the gap between your external walls with insulating material, helping you keep your home warmer for longer, and cutting energy bills in the process.
Through the ECO4 and GBIS government schemes, eligible homeowners can get cavity wall insulation completely free of charge. It’s ideal for homes built after 1920 with unfilled cavity walls and poor energy performance.
Cavity wall insulation is perfect for reducing heat loss, lowering fuel bills, and improving comfort, especially in the colder months.
- Stops up to 35% of heat loss through walls
- Quick installation by certified professionals
- Free for eligible homeowners under ECO4 or GBIS
Is Cavity Wall Insulation Right for My Home?
Cavity wall insulation is ideal for most homes built after the 1920s, when double brick walls with a gap (cavity) became standard. If your property has unfilled cavity walls and a poor energy rating, you’re likely to benefit significantly.
Here’s when cavity wall insulation is most suitable:
- Your external walls are made of brick (not stone or solid wall)
- Your home was built between 1920 and 2005
- You have little or no insulation already
- You notice cold draughts or high heating bills
- Your EPC rating is D, E, F, or G
Not sure if your walls are suitable? Our team will carry out a free survey to check your home’s cavity type, condition, and eligibility.
Insulate Your Home with a Cavity Wall Insulation Grant!
Find out if you’re eligible for free cavity wall insulation under the ECO4 or GBIS scheme — and start saving on your energy bills today.
Benefits of Cavity Wall Insulation
Cavity wall insulation is one of the most cost-effective ways to make your home warmer and more energy efficient. By filling the gap between your external walls, it helps trap heat inside and cut down on fuel usage.
Lower Energy Bills
Insulating your cavity walls helps reduce heating costs by up to 35% — saving you hundreds each year.
Warmer, More Comfortable
Enjoy a more stable indoor temperature during winter without constantly turning up the thermostat.
Reduced Carbon Emissions
Lower energy use means a smaller carbon footprint — making your home more eco-friendly.
Key Features of the Cavity Wall Insulation Grant
- Loft Insulation – Prevent heat loss through your roof and keep your home warmer all year round.
- Internal Wall Insulation (IWI) – Great for solid wall homes where cavity insulation isn’t suitable.
- Room in Roof Insulation – Keep converted loft rooms warm and compliant with building standards.
Who Qualifies for Free Cavity Wall Insulation?
If your home has uninsulated cavity walls and poor energy efficiency, you may qualify for free cavity wall insulation under the UK Government’s ECO4 or GBIS scheme. This applies to homeowners only — and depends on your benefits status, council tax band, and EPC rating.
- You’re a homeowner
- You receive a qualifying income-based benefit.
- OR your Council Tax band is A, B, C, D in England and A, B, C, D or E in Scotland
- Your walls are suitable for cavity wall insulation
If you meet these criteria, your insulation will be fully funded with no cost to you.
Qualifying Benefits for Cavity Wall Insulation Grants
To get free cavity wall insulation under the ECO4 or GBIS schemes, at least one person in your household must receive one of the following qualifying benefits:
- Universal Credit
- Pension Gurantee Credit
- Pension Savings Credit
- Income Support
- Job Seeker's Allowance
- Employment & Support Allowance
- Working Tax Credit
- Housing Benefit
If your household receives any of these benefits, you may automatically qualify for free cavity wall insulation under the government-funded ECO4 or GBIS schemes.
What Happens Next if You Qualify for FREE Cavity Wall Insulation?
Once you’re confirmed eligible through ECO4 or GBIS, the process is quick, simple, and completely free of charge. We’ll handle everything from start to finish — so you can sit back and enjoy a warmer, more efficient home.
It's as Easy as...
Book a free survey
We’ll carry out a full property assessment to check cavity wall suitability and confirm your eligibility under the scheme.
Installation planning
Our team will plan the insulation process using the best materials for your home — ensuring minimal disruption and maximum efficiency.
Get things done
Our certified installers will complete the cavity wall insulation in just a few hours. You’ll immediately notice the difference warmer rooms.
Get Started with HnR Energy Solutions
Take the first step towards an energy-efficient home today. Check your eligibility for the ECO4 Scheme and start saving on your energy bills with no upfront costs.
Why Choose
HnR Energy Solutions
We’re not just about providing eco-friendly energy solutions. Here’s why customers trust us:
20+ Years of Experience
We bring over two decades of expertise in energy-efficient home solutions.
No Cost At All - 100% FREE
Eligible households can access ECO4 grants with no initial cost.
Installation Within 7 Days
From free surveys to expert installations, we manage everything.
Government Funding
We help you access ECO4 grants, boiler grants, insulation grants and more.
Trusted Across the UK
Our proven track record with homeowners across the UK speaks itself.
FREE Cavity Wall Insulation Under ECO4 Scheme
Refer a Friend, Earn £100 Each!
Recommend us to your family and friends for a new boiler. Once your friend’s boiler is installed by us and you’ve had yours installed too, you’ll each receive £100.
Frequently Asked Questions
Find quick answers to your most common questions here.
Yes, cavity wall insulation is still widely recommended for most properties built after 1920. It’s one of the most cost-effective ways to improve energy efficiency and reduce heat loss through your external walls.
If installed incorrectly or in unsuitable properties (e.g. homes with damaged brickwork or exposure to wind-driven rain), cavity wall insulation can lead to moisture issues. That's why a proper pre-installation survey is essential — which we provide for free.
Some older installations were poorly done or installed in unsuitable homes. This led to damp issues, prompting removal. However, modern installations under ECO4/GBIS follow strict PAS 2030 standards and include full suitability checks to prevent this.
No — damp usually occurs only when insulation is installed in properties that weren’t suitable or had existing defects (like cracked render or porous bricks). With a proper survey and professional installation, cavity wall insulation does not cause damp.
Yes — under the ECO4 and GBIS schemes, cavity wall insulation is fully funded for eligible homeowners. If you qualify, there’s no cost to you at any stage, including survey, materials, installation, or aftercare.
Most cavity wall insulation jobs are completed in 2 to 4 hours, depending on the size and layout of your home. We always work to minimise disruption and leave your property clean and tidy.
Yes — if you’re a pensioner and receive a qualifying benefit such as Pension Credit, you may qualify for free cavity wall insulation under ECO4. Even if you don’t receive benefits, you could still qualify under GBIS based on your Council Tax band and EPC rating.
Our qualified team will carry out a free survey to assess your wall type, cavity condition, and overall suitability. We only proceed with installations that are 100% appropriate and safe for cavity fill.
Yes — insulating your walls can significantly improve your Energy Performance Certificate (EPC) rating, which may also increase your home’s value and reduce your long-term heating costs.
Yes — all our installations are carried out by TrustMark-registered installers and include a guarantee for materials and workmanship under the ECO4/GBIS scheme.