It’s easy to overlook the space above your head. Many of us treat the loft as a glorified storage area—an out-of-sight, out-of-mind haven for dusty boxes and old holiday decorations. Yet, that very space could be the key to a warmer home and significantly lower energy bills. Loft insulation acts like a snug blanket, stopping heat from escaping through your roof. The result? A cosier living environment and money saved on heating costs.
Studies suggest that up to 25% of a home’s heat can vanish through an uninsulated loft. By installing the right thickness of insulation—often recommended at around 270mm—you can lock in that warmth, making your boiler or heating system work less. And that means fewer pounds flying out of your wallet each month. If that sounds appealing, read on. You might even qualify for grants that slash or eliminate the cost of getting your loft properly insulated.
How to Get a Grant for Loft Insulation in the UK
The UK government is keen on helping households reduce energy consumption and cut carbon emissions. Two major schemes stand out:
ECO4 (Energy Company Obligation)
Obligates energy suppliers to fund energy-saving improvements in eligible homes. Loft insulation is high on the list of measures that can make a big difference.
Great British Insulation Scheme (GBIS)
As its name suggests, this scheme focuses heavily on insulation—loft, cavity, internal, and more. If you qualify, you could get a significant chunk of the cost covered.
If you’re unsure where to start, scroll to the bottom of this page and try our Eligibility Checker . In just a few clicks, you’ll know whether you meet the criteria for one or both of these programmes. Why pay full price when you could secure a grant or partial funding to keep your home cosy?
How Much Money Can I Save with Loft Insulation?
Let’s talk numbers. According to various energy advisory bodies, a typical semi-detached house could save £180 to £300 per year by installing or upgrading loft insulation. Detached homes can save even more—sometimes over £400 a year—depending on their size and how poorly insulated they were to begin with.
These savings aren’t just theoretical. They show up in your monthly bills, year after year, effectively paying for the cost of installation (if you’re covering any portion yourself) many times over. Plus, a well-insulated loft often makes your home feel more comfortable, with fewer temperature swings from room to room. No more freezing in the upstairs bedroom while the downstairs living area basks in heat.
Who Qualifies for Loft Insulation Grants Under ECO4 and GBIS?
ECO4 and the Great British Insulation Scheme both aim to target the homes that can benefit most from energy-efficiency upgrades. That means if you’ve been dealing with a draughty loft or sky-high energy bills, you might be first in line for help. Use our Eligibility Checker below to find out if you meet the specific requirements.
Common Pitfalls When Installing Loft Insulation
Loft insulation might seem straightforward—roll out some fibreglass or mineral wool, and you’re done. But there are pitfalls to watch out for:
Inadequate Thickness: Some quick-fix installers might skimp on material, giving you less insulation than recommended. This slashes your potential savings.
Poor Ventilation: A good loft insulation job also maintains airflow. Blocked vents can lead to condensation, damp, and even mould in the loft space.
Incorrect Boarding: If you plan to use your loft for storage, you’ll need raised boards above the insulation. Simply squashing insulation under boards reduces its effectiveness.
Dodgy Installers: Some companies promise rock-bottom prices but use subpar materials or skip vital steps. The result? An insulation job that underperforms and might even void your eligibility for a grant if it doesn’t meet scheme standards.
At Energy Grant Service , we only work with certified installers who understand the regulations (such as PAS 2035) and the requirements set by ECO4 and GBIS. That way, you get the full benefit of any grant—and an insulation job that actually works.
Why Loft Insulation Matters More Than Ever
Energy prices aren’t exactly plummeting. Every bit of heat you lose through an uninsulated loft translates into money wasted. Meanwhile, the UK is pushing hard to cut carbon emissions. Loft insulation ticks both boxes: it reduces your bills and helps the country meet its climate goals. With schemes like ECO4 and GBIS offering support, there’s never been a better time to act.
But remember, funding isn’t infinite . Once the pots run dry, you could miss out on these grants. Why delay, especially if you’re already struggling with a cold home or high energy bills?
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