The clock is ticking. The Great British Insulation Scheme (GBIS) is about to close its doors for good.
If you've been thinking about free or discounted loft insulation, now's the time to get serious. Here's everything you need to know before the 31st March 2026 deadline.
1. The Scheme Ends on 31 March 2026: No Extensions
This isn't a soft deadline. 31st March 2026 is when GBIS stops completely.
After that date, there's no more government-backed support for insulation. No new applications. No installations. No grants.
The scheme was designed to help millions of UK households reduce energy bills and tackle fuel poverty. But it was always temporary.
2. Applications Closed on 31 January 2026
Here's the tough part. The deadline to submit new applications has already passed.
If you didn't apply by 31st January 2026, you're not getting in. The government stopped accepting new GBIS applications weeks ago.
If you already applied before the cutoff, you're still in the system. But you need to move fast.
3. All Work Must Be Completed by 31 March 2026
Getting approved is only half the battle. Your loft insulation installation must be fully completed by the scheme's end date.
That means installed, inspected, and signed off. If your installer runs out of time, you miss out.
Right now, installers across the UK are swamped. Demand is higher than ever, and capacity is shrinking by the day.
4. You Could Get Free Loft Insulation UK: If You Qualify
The scheme covers free or heavily discounted insulation for eligible homeowners. This includes:
- Loft insulation (bringing your loft up to 270mm)
- Cavity wall insulation
- Other single insulation measures
The goal? Reduce heat loss, lower your energy bills, and improve your home's EPC rating.
For many households, this could mean hundreds of pounds in savings every year.
5. Eligibility Depends on Council Tax Band and EPC Rating
Not everyone qualifies. Here's the breakdown:
Council Tax Bands:
- England: A-D
- Scotland: A-E
- Wales: A-E
EPC Rating:
Your property must have an EPC rating of D, E, F, or G.
One important note: Rental properties with an EPC rating below E don't qualify for insulation measures under GBIS. Landlords need to meet minimum energy standards separately.
You can check your EPC rating for free on the government's EPC register.
6. GBIS Grants Are Funded by Energy Companies, Not the Government
GBIS isn't a direct government handout. It's a supplier obligation scheme run by Ofgem.
Medium and large energy companies are required to fund these improvements as part of their environmental obligations. They work with certified installers to deliver the scheme across the UK.
That's why you'll often see energy companies advertising "free insulation" or "GBIS grants." They're fulfilling their legal duties.
7. Installer Capacity Is Running Out Fast
Here's where urgency kicks in. There aren't unlimited installers.
Every qualified professional is booked solid right now. The closer we get to March 31st, the fewer slots are available.
Even if you're approved, you could miss out if there's no one available to do the work before the deadline.
If you're already in the system, contact your installer immediately. Confirm your installation date. Don't wait for them to chase you.
8. You Must Use a Certified Professional Installer
You can't just hire any builder. GBIS requires you to use a government-certified installer who meets official standards.
Before work begins, you'll need a property assessment. The installer will survey your loft, check for damp or ventilation issues, and confirm what insulation you need.
All installations are subject to quality checks and must meet building regulations.
At ComfySeal Ltd, we're TrustMark-certified and ready to help. If you're already approved for GBIS and need a reliable installer, book your free consultation here.
9. The ECO Scheme Is Also Ending
GBIS isn't the only support disappearing. The Energy Company Obligation (ECO) scheme also ends on 31st March 2026.
ECO has been helping low-income and vulnerable households with free heating upgrades and insulation for years. After March, that safety net is gone.
The government hasn't announced a replacement scheme yet. This could leave thousands of households without support.
If you're eligible for ECO, act now. Don't assume there'll be another scheme waiting.
10. After March 2026, You're Paying Full Price
Once GBIS ends, you'll pay the full commercial rate for loft insulation.
Professional loft insulation typically costs between £400 and £1,200 depending on your property size and insulation type.
That's money you could have saved if you'd acted earlier. The scheme was designed to make insulation affordable. After March, affordability is your problem.
If you want to upgrade your loft insulation after the deadline, you'll still save money on energy bills in the long run. But the upfront cost will be entirely on you.
What Should You Do Right Now?
If you already applied for GBIS before 31st January:
- Contact your installer immediately
- Confirm your installation date
- Make sure it's scheduled before 31st March
- Prepare your loft for the work (clear storage, ensure access)
If you missed the application deadline:
You're out of luck for GBIS grants. But that doesn't mean you should ignore your loft.
Poor insulation is still costing you money every single day. Your heating bills are higher than they need to be. Your home is colder in winter and hotter in summer.
The long-term savings from proper insulation still make it worth doing: even at full price.
Why Loft Insulation Still Matters
Even without government support, upgrading your loft insulation is one of the smartest investments you can make.
Here's why:
Lower energy bills. Up to 25% of heat escapes through an uninsulated roof. Proper 270mm loft insulation keeps warmth inside.
Higher property value. Homes with better EPC ratings sell for more and attract more buyers.
Compliance with regulations. If you're a landlord, you'll need at least an EPC 'C' rating by 2028.
Comfort. A well-insulated loft means a warmer home in winter and a cooler home in summer.
The GBIS deadline is looming, but the need for insulation isn't going anywhere.
Final Thoughts
The Great British Insulation Scheme is ending. 31st March 2026 is the final deadline for all installations.
If you're already in the system, move fast. Confirm your dates and get the work done.
If you missed the application window, don't panic: but don't ignore your loft either. Professional insulation still pays for itself through lower energy bills and increased property value.
Need help upgrading your loft insulation? Whether you're using GBIS grants or paying privately, get a quote from ComfySeal Ltd today.
The deadline is real. The savings are real. What you do next is up to you.
