How to Get Free Loft Insulation in the UK
The ECO4 scheme funds free professional loft insulation for eligible UK households. If you receive qualifying benefits and live in a property rated D, E, F, or G, you can get your loft insulated to the full 270mm at no cost. The scheme saves a detached house up to £355 per year on gas heating. This guide explains exactly who qualifies, how to apply step by step, and what to do if you do not receive benefits.
Do you qualify?
There are two routes to free loft insulation: the benefits route and the ECO4 Flex route.
Benefits route (most straightforward)
You qualify if you receive any of these means-tested benefits and your property has an EPC rating of D, E, F, or G:
| Qualifying benefit | Income condition |
|---|---|
| Universal Credit | Any amount |
| Pension Credit (Guarantee Credit) | Any amount |
| Child Tax Credit | Income under £16,385 |
| Working Tax Credit | Income under £16,385 |
| Income Support | Any amount |
| Income-based JSA | Any amount |
| Income-related ESA | Any amount |
| Housing Benefit | Any amount |
You must be the homeowner or a private tenant with landlord permission. Social housing tenants can qualify through their housing association.
Check your property's EPC rating on the GOV.UK register. If you do not have an EPC, the installer can arrange one as part of the assessment.
ECO4 Flex route (no benefits required)
If you do not receive qualifying benefits, your local council can refer you through ECO4 Flex. Common eligibility criteria include household income below a local threshold, living in a property rated E, F, or G, being in fuel poverty (spending more than 10% of income on energy), or having a health condition worsened by cold housing.
ECO4 Flex criteria vary significantly by council. Some are generous and actively promote the scheme. Others have minimal programmes. It is always worth asking your council's housing or environmental health team.
Use our grant eligibility checker to see which route is available to you.
Check before paying for DIY
DIY loft insulation costs £300 to £600. ECO4 covers it for free with professional installation, proper ventilation checks, and a guarantee. If there is any chance you qualify, check first.
How to apply: step by step
Step 1: Check your eligibility. Confirm you receive a qualifying benefit (or ask your council about Flex). Check your property's EPC rating on GOV.UK. Use our grant eligibility checker as a starting point.
Step 2: Contact an ECO4 installer or your energy supplier. You can approach either. ECO4 installers are listed on the TrustMark register. Your energy supplier (British Gas, EDF, E.ON, OVO, Scottish Power, Octopus) can also refer you. Ask specifically about "ECO4 loft insulation".
Step 3: Eligibility verification. The installer or supplier checks your benefit status (usually by seeing a recent benefit letter or checking with DWP) and confirms your property's EPC rating.
Step 4: Property assessment. A qualified retrofit assessor visits your home. They check the existing insulation depth, inspect for damp or asbestos risk, assess ventilation, and determine what work is needed. This visit is free and takes about an hour.
Step 5: Installation. If approved, the installer schedules the work. Loft insulation installation takes 2 to 4 hours. The installer lays mineral wool to 270mm, fits eaves ventilation trays, insulates the loft hatch, and lags any exposed pipes. You do not need to be in the loft or do anything other than provide access.
Step 6: Completion. The installer provides a handover pack with details of what was installed and any warranties. A new EPC should be arranged to confirm the improvement. Your home is now warmer and your bills lower.
Never pay for ECO4 work
Free means free. Do not pay an upfront fee, deposit, or "admin charge" for ECO4 insulation. Legitimate installers verify eligibility and carry out the work at no cost to you. Be wary of cold callers or door knockers asking for money. Check any installer on the TrustMark register.
What you get
Free ECO4 loft insulation includes mineral wool rolls laid to 270mm (the recommended depth), eaves ventilation trays to prevent condensation, loft hatch insulation, pipe lagging for any exposed pipes in the loft, and a post-installation check. The work complies with PAS 2035 quality standards and the installer must be TrustMark registered.
The value of this package, if you were paying yourself, would be £400 to £800 for professional installation. For more on what is involved, read our DIY loft insulation guide which covers the same process in detail.
How much will you save?
| Property type | Annual saving (gas heating) | 10-year saving |
|---|---|---|
| Detached house | £355 | £3,550 |
| Bungalow | £280 | £2,800 |
| Semi-detached | £215 | £2,150 |
| End-terrace | £175 | £1,750 |
| Mid-terrace | £135 | £1,350 |
| Flat (top floor) | £100 | £1,000 |
Source: Energy Saving Trust. Upgrading from 0 to 270mm mineral wool. Gas at Ofgem Q1 2026 rates.
Since the insulation is free, every penny saved goes straight into your pocket from day one. Over 10 years, a detached house saves £3,550 and a semi saves £2,150 with zero outlay. Use our insulation savings calculator for your exact figure.
ECO4 can cover more than loft insulation
If you qualify for free loft insulation, you may also qualify for other ECO4 measures at no cost. The scheme takes a whole-house approach, and the assessor will identify everything your property needs. Additional measures may include cavity wall insulation, solid wall insulation, underfloor insulation, a boiler replacement, and heating controls.
The total value of a full ECO4 package can exceed £10,000. Read our complete ECO4 guide for the full list of eligible measures and how the whole-house assessment works.
What if you do not qualify?
If you cannot access ECO4, loft insulation is still one of the cheapest and best-value home improvements available.
DIY installation costs £300 to £600 in materials and takes 3 to 6 hours. Read our step-by-step DIY guide. See recommended loft insulation rolls for the right product.
Professional installation costs £400 to £800. It qualifies for 0% VAT until March 2027, bringing the cost down further.
Either way, the payback is under 2 years for most property types. Read Is Loft Insulation Worth It? for the complete financial analysis. Check how long your existing insulation lasts before deciding whether to replace or top up.
After insulating, track your savings with recommended energy monitors. If you still have draughts, see recommended draught excluder strips for an easy next step.
Frequently asked questions
Can I get free loft insulation in the UK?
Yes, through ECO4 if you receive qualifying benefits and your property is rated D, E, F, or G. Use our grant checker to see if you qualify.
Who qualifies for free loft insulation?
Households on Universal Credit, Pension Credit, Child Tax Credit, Income Support, income-based JSA, income-related ESA, or Housing Benefit. ECO4 Flex extends access through council referrals for low-income households.
How do I apply for free loft insulation?
Contact an ECO4 installer or your energy supplier. They verify eligibility and arrange a free assessment. Your council can also refer you through ECO4 Flex.
What if I do not receive benefits?
Ask your council about ECO4 Flex. If you do not qualify for any free route, DIY installation costs £300 to £600 and pays back in under 2 years.
When does the free insulation scheme end?
ECO4 runs until December 2026. Apply now. Installer capacity decreases closer to the deadline.
Data sources
ECO4 eligibility from GOV.UK. Savings data from Energy Saving Trust. Energy prices from Ofgem Q1 2026 price cap. Installer standards from TrustMark.