The Great British Insulation Scheme (GBIS) just got a major upgrade. From May 2025, eligible homes can receive two insulation measures instead of one. This simple change offers major benefits for energy savings and comfort.
This guide explains what’s new, which combinations are now allowed, and how Pyramid Eco can help you make the most of the scheme.
What Dual Insulation Measures Are Now Allowed Under GBIS?
Under the updated rules, the Great British Insulation Scheme now permits households to receive two insulation measures, as long as both are appropriate for the property and do not cover the same area. This enables more tailored upgrades that reflect each home’s specific needs.
Eligible combinations include, but are not limited to:
- Loft insulation and cavity wall insulation
- Internal wall insulation and room-in-roof insulation
- Loft insulation and solid wall insulation (either internal or external)
- Flat roof insulation and cavity wall insulation
- Underfloor insulation and loft insulation
- Room-in-roof insulation and loft insulation
All installations must follow PAS 2035 guidance and include an assessment to ensure the measures work effectively together. This added flexibility helps more households reduce heat loss through a single, coordinated retrofit.
Related: Great British Insulation Scheme, What is GBIS (ECO+)?
Energy Saving Benefits for Homeowners and Tenants
When a home has two insulation measures in place, it holds heat better, uses less energy and becomes more affordable to maintain.
For a typical semi-detached home, the combination of cavity wall insulation and loft insulation can deliver:
- Up to £470 in energy bill savings each year
- An annual reduction of around 1,250 kilograms of CO₂.
With less heat escaping through walls or roofs, your home stays comfortable for longer and uses less energy. It’s a simple change with lasting benefits for your home and your budget.
*Data from:
Why Dual Measures Make Sense for Landlords and Local Authorities
Allowing two insulation measures makes it easier for landlords, councils and housing providers to upgrade homes more efficiently and affordably.
Key benefits include:
- Better SAP scores and EPC ratings, helping meet energy standards
- Easier to retrofit older or more complex homes
- More ways to access funding and link with other retrofit schemes
- Less disruption for tenants by combining work into one visit.
This flexibility helps providers plan smarter upgrades and make a bigger impact across their housing stock.
Helping Older Homes Catch Up on Energy Efficiency
Older and harder-to-treat homes often fall behind on energy efficiency. Many lose heat from multiple places and need more than one insulation upgrade to make a difference.
The new GBIS rules allow two measures per home, which means these properties are no longer left out. This change makes it easier to improve comfort, reduce energy waste and support households that need it most.
It’s especially useful for:
- Pre-1930s homes with solid walls
- Homes with room-in-roof spaces or loft conversions
- Properties with poor insulation in both walls and roofs.
This is a big step toward reducing carbon emissions and improving older homes across the country.
Pyramid Eco’s Multi-Measure Delivery Model
At Pyramid Eco, we specialise in delivering more than one energy upgrade at a time. Our multi-measure approach means we assess the whole home and recommend the best combination of insulation and ventilation to maximise performance and comfort.
Our services include:
- Eligibility checks and application support
- Whole-home energy assessments
- Delivery of dual insulation measures and ventilation upgrades
- Compliance management and reporting.
All our work follows PAS 2035 standards, ensuring every installation is high-quality, compliant and built to last. By taking a coordinated approach, we help homes become warmer, more efficient, and healthier over the long term.
Let’s Explore What’s Possible Together
The latest GBIS update makes it easier to upgrade homes and save energy.
Pyramid Eco can help you take full advantage. Whether you are upgrading a single home or delivering for a wider community, we provide expert support from assessment to installation.
Book a free consultation today and let’s get started on creating warmer, more efficient homes.
