Energy bills keep climbing. Your loft keeps leaking heat. And somewhere out there, free government grants exist to fix the problem.
Sounds too good to be true?
It's not. The Great British Insulation Scheme (GBIS) and ECO4 grants are real programmes designed to help UK homeowners insulate their homes at little or no cost. The catch? Not everyone qualifies. And time is running out.
This guide breaks down both schemes. You'll learn who's eligible, how to apply, and how to avoid common pitfalls. No jargon. No confusion. Just the facts you need to make a decision.
Why Loft Insulation Matters in 2026
Up to 40% of your home's heat escapes through the roof. That's not a small leak. That's a gaping hole in your household budget.
Proper loft insulation can save you up to £350 per year on energy bills. It also improves your EPC rating, making your home more attractive to buyers and lenders.
The government knows this. That's why they've invested billions into insulation grants. The goal? Help UK households cut emissions and reduce fuel poverty.
What Is the ECO4 Scheme?
ECO4 stands for Energy Company Obligation 4. It's a government-mandated programme that requires large energy suppliers to fund home energy improvements for vulnerable households.
The scheme runs until March 2026. It targets low-income families and those receiving certain benefits.
Who Qualifies for ECO4?
You may be eligible if you receive any of the following:
- Universal Credit
- Pension Credit
- Child Tax Credit
- Working Tax Credit
- Income Support
- Jobseeker's Allowance (income-based)
- Employment and Support Allowance (income-based)
- Housing Benefit
Your property must also have an EPC rating of D, E, F, or G. The worse your current energy performance, the more likely you'll qualify.
What Does ECO4 Cover?
ECO4 can fund a range of improvements. These include:
- Loft insulation (up to 270mm depth)
- Cavity wall insulation
- Solid wall insulation
- Heating system upgrades
For loft insulation specifically, ECO4 typically covers the full cost. That means £0 out of your pocket.
What Is the Great British Insulation Scheme?
The Great British Insulation Scheme (GBIS) launched in 2023. It's designed to help a broader range of households access free loft insulation UK-wide.
Unlike ECO4, you don't always need to be on benefits. GBIS uses a combination of Council Tax bands and EPC ratings to determine eligibility.
Who Qualifies for GBIS Grants?
GBIS eligibility depends on two main factors:
1. Your Council Tax Band
- England: Bands A to D
- Scotland and Wales: Bands A to E
2. Your EPC Rating
- Your property must have an EPC rating of D or below
If you meet both criteria, you can apply even without receiving benefits. This makes GBIS more accessible for middle-income households.
Some applicants on qualifying benefits may also access GBIS through the "low-income" route, similar to ECO4.
Does GBIS Cover Everything?
In most cases, GBIS grants cover the full cost of loft insulation.
However, there's one exception. If loft insulation is installed as a standalone measure (without other improvements), you may need to make a small contribution. This varies by supplier and installer.
The good news? Only one insulation measure is typically installed per property. So you won't be pressured into multiple upgrades you don't need.
ECO4 vs GBIS: Key Differences
Both schemes offer free loft insulation. But they work differently.
| Feature | ECO4 | GBIS |
|---|---|---|
| Primary eligibility | Benefits-based | Council Tax + EPC |
| Income requirement | Low-income households | Any income (if criteria met) |
| Cost to homeowner | Usually £0 | Usually £0 (small contribution possible) |
| Scheme end date | March 2026 | March 2026 |
| Measures covered | Multiple | Typically one per property |
If you're on benefits, ECO4 is likely your best route. If you're not on benefits but live in an older, less efficient home, GBIS may be your answer.
Critical Deadline: January 2026
Here's the part most people miss.
Both schemes end on 31 March 2026. But applications for GBIS must be submitted by 31 January 2026 to allow time for surveys and installation.
That's not far away.
If you're thinking about applying, now is the time. Waiting until February could mean missing out entirely.
How to Check Your Eligibility
The process is simpler than you might expect.
Step 1: Find your EPC rating
Search your address on the government's EPC register. If your rating is D or below, you may qualify.
Step 2: Confirm your Council Tax band
Check your Council Tax bill or search online. Bands A–D (England) or A–E (Scotland/Wales) are eligible for GBIS.
Step 3: Review your benefits
If you receive qualifying benefits, you may be eligible for ECO4 regardless of your Council Tax band.
Step 4: Book a professional survey
An approved installer must assess your property before any grant is approved. This confirms your home is suitable for loft insulation.
Why Choose ComfySeal as Your Grant Installer?
Not all installers are equal. Some rush jobs. Others cut corners. A few disappear after installation, leaving you with no support.
ComfySeal Ltd does things differently.
Free Professional Loft Survey
We start with a free, no-obligation survey. Our certified assessors inspect your loft, check eligibility, and recommend the best insulation type for your home. No pressure. No hidden fees.
Certified, Fully Insured Teams
Our installers are trained to the highest UK standards. Every job is completed by fully insured professionals who understand Part L building regulations and manufacturer requirements.
10-Year Workmanship Guarantee
We stand behind our work. Every ComfySeal installation comes with a 10-year guarantee. If something goes wrong, we fix it. Simple as that.
End-to-End Grant Support
Navigating GBIS and ECO4 paperwork can be frustrating. We handle it for you. From eligibility checks to final sign-off, our team manages the entire process.
Ready to see if you qualify? Get a free quote and we'll take it from there.
Common Questions About Free Loft Insulation Grants
Do I need to be with a specific energy supplier?
No. Neither ECO4 nor GBIS requires you to switch suppliers. Any UK homeowner can apply through an approved installer.
Can I get both ECO4 and GBIS?
Generally, no. You'll qualify for one or the other based on your circumstances. However, ECO4 may cover additional measures beyond loft insulation.
What if I already have some insulation?
If your current insulation is below 270mm, you may still qualify for a top-up. Our survey will confirm whether your loft meets current standards.
Will this affect my mortgage or property value?
Loft insulation improves your EPC rating, which can increase property value and make remortgaging easier. It's a win-win.
Final Thoughts
Free loft insulation UK grants are real. ECO4 and GBIS offer genuine opportunities to cut your energy bills without spending a penny.
But the window is closing. With both schemes ending in March 2026, and GBIS applications due by January, the time to act is now.
Check your eligibility. Book a survey. And stop paying to heat the sky.
Contact ComfySeal today to see if you qualify for free loft insulation.
