Free Loft Insulation: Government Grants for 2026
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Loft insulation is one of the simplest and most effective ways to cut your heating bills. An uninsulated home loses around 25% of its heat through the roof. The government currently funds loft insulation through multiple grant schemes — including ECO4 (until December 2026) and the Warm Homes: Local Grant. If you're eligible, the work is completely free.
How Much Could You Save?
What Is Loft Insulation?
Loft insulation involves laying mineral wool (glass or rock wool) or other insulating material between and over the joists in your loft space. The recommended depth is 270mm (about 10.5 inches). Many older homes have little or no loft insulation, or only 100mm installed decades ago.
If your loft is accessible and not damp, this is a straightforward job that typically takes 2-4 hours for a professional installer. There's minimal disruption — no scaffolding, no mess inside your home.
Which Grants Cover Loft Insulation?
- ECO4 — Available UK-wide until December 2026. Funded by energy suppliers. Covers loft insulation for eligible households.
- Warm Homes: Local Grant — England only. Up to £15,000 for energy efficiency measures including loft insulation. Administered by local councils.
- Warm Homes: Social Housing Fund — For social housing providers upgrading their properties.
- Home Energy Scotland — Grants and interest-free loans for Scottish homeowners.
- Nest (Wales) — Free home energy efficiency improvements for eligible Welsh households.
Am I Eligible?
You may qualify for free loft insulation if you meet ONE of these criteria:
- You receive a means-tested benefit (Universal Credit, Pension Credit, Child Tax Credit, etc.)
- Your household income is under £36,000
- Your property has an EPC rating of D, E, F, or G
- You live in a Council Tax band A-D property
- You have a health condition made worse by cold housing
- Your council has identified your area as eligible under LA Flex
How It Works
- Check eligibility — Use our free 2-minute checker to see which grants you qualify for.
- Get matched — We connect you with a certified installer in your area.
- Home survey — An installer visits to assess your loft and confirm the work needed.
- Installation — Insulation is laid in your loft. Usually takes 2-4 hours with no disruption.
- Sign-off — The installer provides certification and your EPC rating improves.
Loft Insulation: Key Facts
| Detail | Information |
|---|---|
| Recommended depth | 270mm (mineral wool) |
| Installation time | 2-4 hours |
| Typical cost (without grant) | £400-£800 |
| Annual savings | £300-£590 |
| Disruption level | Minimal — installer works in loft only |
| Lifespan | 40+ years |
| EPC improvement | Typically 1-2 band improvement |
Good to Know
If you use your loft for storage, raised loft legs can be fitted so insulation goes underneath your boarding. This is covered by most grants.
An insulated loft hatch is usually included in the installation to prevent heat escaping through the access point.
Flat roof insulation is a different process. If you have a flat roof extension, mention this when you check eligibility.
Frequently asked questions
Is loft insulation really free?
Yes, if you qualify for ECO4 or the Warm Homes: Local Grant, the full cost of loft insulation is covered. You pay nothing.
How long does loft insulation last?
Mineral wool loft insulation lasts 40+ years and doesn't degrade. Once installed, you shouldn't need to replace it.
Will I lose my loft storage space?
Not necessarily. Installers can fit raised loft legs so boarding sits above the insulation layer, keeping your storage space. This is usually included in grant-funded work.
My loft already has some insulation. Can I get a top-up?
Yes. If your current insulation is less than 100mm deep, you're likely eligible for a free top-up to 270mm under ECO4 or the Warm Homes: Local Grant.
Do I need to clear my loft before installation?
Yes, any items stored in the loft need to be moved before the installer arrives. The installer will work in the empty loft space.
Can tenants get free loft insulation?
Yes, but you'll need your landlord's written permission. The grant application can be made by either the tenant or the landlord.
Find Free Loft Insulation in your area
See how Free Loft Insulation works in your area, including local council schemes, eligibility criteria, and nearby installers.
Other available grants
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