Funding Available from GOV.UK

Underfloor Insulation Grants UK 2024

£1000s in Free Grants to Insulate Your Home

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Up to £40,000 in Funding Available from GOV.UK

How do the grants work?

Free grant funding is available to eligible households for a range of home insulation measures
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Up to £40,000 in Funding Available from GOV.UK

Insulating the floor in your home is a useful way to maintain heat, as even if you’ve got your loft and walls insulated, up to 20% of your heating could still be lost through your floor. As with other types of insulation, you could be eligible for a free underfloor insulation grant through various funding schemes, including the Great British in Insulation Scheme (GBIS) or the ECO scheme, if you meet the eligibility criteria.

Under the schemes, low-income and low-energy efficiency households, plus those who are likely to struggle with the cost of heating their home, could benefit from a free grant which would see free underfloor insulation installed, if they qualify and if it is suitable for their home.

Is your property suitable for underfloor insulation?

Modern properties tend to have concrete ground floors that can be insulated by laying insulation on top, but these are not eligible under the scheme.  The funding is available generally for older type properties which are more likely to have a suspended timber floor.

If you have a basement or cellar below your property, then it is likely that you will have a suspended floor, with the floorboards resting over the joists. These types of floors usually lose heat more easily. Air bricks or ventilation bricks are another indication that you likely have a suspended floor that would benefit from underfloor insulation.

When your home is being insulated from underneath, the mineral fibre is rolled out and secured with netting that is stapled between the floor joists. Another modern alternative is the use of spray foam being applied to the underside of your floorboards.

What type of floor do you have?

You can determine your floor type by taking a look, either from a basement or cellar, or by lifting a corner of any carpet and underlay. If you have a suspended wooden floor, you will probably be able to see the joists and bottom of the floorboards from underneath

Why apply for underfloor insulation?

  • If you qualify for a floor insulation grant you could get completely free insulation installed.
  • You can benefit from sizeable reductions in your energy bills when you get underfloor insulation.
  • Boost your home’s energy efficiency and enjoy a more comfortable home without worrying about how much you’re spending on heating.
  • Increase the re-sale value of your home.
  • Make the most of the insulation grants while they are available.

Who can qualify for underfloor insulation grants?

If your house was constructed after the 1980s the likelihood is that you won’t be eligible for underfloor insulation as they are normally built with concrete floors rather than timber. You could qualify if you have a basement, cellar, or property that is built on a slope, however. 


The Great British Insulation Scheme is aimed at helping low-income households, and those homes that are the least energy efficient and have an Energy Performance Certificate (EPC) rating of D or below. You can find out the EPC rating of your home through the EPC register.

GBIS will also assist those in the lowest low council tax bands, with the criteria differing across the nations, and being relevant to the following council tax bands: 

  • Bands A-D in England
  • Bands A-E in Scotland
  • Bands A-E in Wales

You could qualify for a grant if you meet the above criteria, but only if your household hasn’t previously received government grant funding for energy efficiency improvements.

ECO Scheme

ECO scheme support is more related to being in receipt of government benefits. You could qualify if your household income is £31,000 or less, or if your property is in receipt of a qualifying benefit in order to get access to an insulation grant for free underfloor insulation. These benefits include:

  • Income-based Jobseekers Allowance (JSA)
  • Income-related Employment & Support Allowance (ESA)
  • Income Support (IS) 
  • Pension Credit Guarantee Credit 
  • Working Tax Credit (WTC)
  • Child Tax Credits (CTC)
  • Universal Credit (UC) 
  • Housing Benefit (new eligible benefit under ECO4)
  • Pension Credit Savings Credit (new eligible benefit under ECO4)

As well as being in receipt of a benefit, you need to be the homeowner occupying the property and your home should be situated in England, Scotland, or Wales, and be heated by gas. If you have had your ground floor insulated previously, you could be eligible to have it updated to the latest standards, but one of our professionals can advise on this.

Complying with building regulations

Any floor insulation work carried out at your property should comply with the appropriate building regulations. A measure of how quickly a material is as an insulator is the u-value. For properties in England and Wales, for example, the insulating material should have a U-value of 0.25 W/m2K.

To meet the required standard, this usually requires a minimum of 70mm of high-performance foam insulation, or 150mm of mineral wool insulation, but this will vary depending on the type of floor.

Underfloor insulation grants
man fitting underfloor insulation

How much can you save on heating bills with underfloor insulation?

High-quality underfloor insulation fitted by professionals can cost anything between £300 and £1200, but with underfloor insulation grants, you could get it for free. Installation of underfloor insulation can result in annual energy savings.

The statistics below are from Energy Saving Trust of average annual energy savings depending on your house type (based on fuel prices as of January 2024).

  • Detached house – £135
  • Semi-detached house – £80
  • Mid-terraced house – £55
  • Bungalow – £145

Types of Insulation Available

There are many different types of insulation available to suit any home.

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Loft Insulation

One of the easiest ways to insulate your home quickly

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Spray Foam Insulation

Energy Efficient Expanding Foam Spray

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Cavity Wall Insulation

Insulation installed within the cavity space of your walls

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External Wall Insulation

Insulation installed externally outside the home

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Flat Roof Insulation

Insulation installed for a range of flat roof buildings

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Internal Wall Insulation

Retain your heat with effective internal insulation

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Party Wall Insulation

Insulation for walls between internal rooms

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Underfloor Insulation

Insulation to minimise heat loss through the floor

Up to £40,000 in Funding Available from GOV.UK

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Disabled Grants

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Landlord Grants

Pensioner grants

Pensioner Grants

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Veteran Grants

Why Are Households Installing Insulation?

There has never been a better time to take advantage of insulation funding grants 

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Up to £40,000 in Funding Available from GOV.UK

Enquire today and find out how much in Government funding you could get:

A registered installer will be in contact
Your home's suitability for insulation will be assessed
A suitable insulation option will be recommended
Convenient installation date arranged

Free Funding to Install Home Insulation