Save Energy in Older UK Homes
Eligibility – This scheme is mainly for older homes. Modern properties with solid concrete floors don’t usually qualify, but older houses with suspended timber floors may be eligible under the ECO4 scheme.
Energy savings – Installing underfloor insulation helps to reduce heat loss, lower monthly energy bills, and improve overall comfort.
How to identify a suspended floor – If your property has a basement, cellar, or features air bricks/ventilation bricks, it likely has a suspended timber floor that loses heat more easily.
Grant funding available – Through ECO4 funding, households that meet energy efficiency and income criteria can get free underfloor insulation installed.
How Much Could You Save with Underfloor Insulation
Choosing underfloor insulation in 2025 is one of the simplest ways to improve energy efficiency, cut carbon emissions, and enjoy a warmer home without the high installation cost.
How Much Could You Save with Underfloor Insulation?
Professional underfloor insulation can cost anywhere between £300 and £1,200, but with UK underfloor insulation grants, you could get it completely free. Proper installation can result in long-term annual savings on heating bills.
How Much You Could Save This Month?
Detached house – Save up to £110 per year
Semi-detached house – Save around £70 per year
Mid-terraced house – Save around £45 per year
Detached bungalow – Save up to £120 per year
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Check Your Eligibility To Avail These Grants
Why Apply for Underfloor Insulation Grant in 2025?
If you qualify for a UK underfloor insulation grant through the ECO4 scheme, you could have insulation installed completely free of charge.
Save considerably on heating costs by installing high-quality floor insulation in your home.
Enhance your home’s energy efficiency and comfort while reducing heat loss.
Boost your home’s resale value by investing in this valuable insulation upgrade.
Make your home warmer, healthier, and more sustainable in line with the UK’s Energy Efficiency 2025 goals.
Building Regulations for Floor Insulation Grants in the UK
When installing floor insulation, it’s essential to comply with UK building regulations to ensure both safety and energy efficiency.
A key requirement is the U-value—a measure of how well a material prevents heat loss. In England and Wales, floor insulation should achieve a U-value of 0.25 W/m²K or lower.
To meet this standard, most homes require at least 70mm of high-performance rigid foam or around 150mm of mineral wool, depending on floor type.
Always consult a certified installer to ensure your insulation is compliant and delivers maximum efficiency.
Benefits of the Air Source Heat Pump Grant UK
Blanket insulation
Costs around £13–£18/m². Made from rock or glass minerals, budget-friendly, and installed between joists under floorboards.
Rigid board insulation
Costs around £15–£17/m². Made from PIR or PUR, lightweight, and highly effective at reducing heat loss.
Spray foam Insulation
Costs around £22–£26/m². Polyurethane foam expands to fill floor cavities, creating excellent thermal performance.
Multi-foil insulation
Costs around £3–£4/m². Made from aluminium layers with foam; affordable but less effective than other options.
Insulation screed
Costs around £18–£20/m². A cement-sand-water mix applied on solid floors that provides minor insulation and creates a level surface.
ECO4 Scheme Eligibility | Free Boiler Grant UK 2025
You may qualify for the Eco Boiler Scheme if you receive one of these UK benefits
- Income-Based Jobseeker's Allowance (JSA)
- Income Related Employment & Support Allowance (ESA)
- Income Support (IS)
- Pension Guarantee Credit
- Working Tax Credit (WTC)
- Child Tax Credit (CTC)
- Universal Credit (UC)
- Housing Benefit
- Pension Savings Credit
John Smith
20 Nov 2021
Excellent service from start to finish. The team was professional and the new boiler works perfectly. Highly recommended for anyone looking for quality installation.
Emma Wilson
18 Nov 2021
Great experience with the team. They explained everything clearly and completed the work efficiently. Very satisfied with the results and would use again.
David Turner
12 Nov 2021
The installation was quick and hassle-free. My home feels warmer and my energy bills have already started to drop. Thank you for the fantastic service!
Sarah Patel
05 Nov 2021
I was unsure about applying for the ECO4 scheme, but the team guided me through every step. The new boiler is brilliant and the process was smooth.
Michael Brown
28 Oct 2021
Very professional and friendly staff. The free boiler grant made a real difference for my family. Highly recommend this service to others.
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Check Your Eligibility To Avail These Grants