Insulation Type
External Wall Insulation
Wrap your home in a thermal layer to dramatically reduce heat loss — ideal for solid-wall properties, fully funded through government grants.
What Is External Wall Insulation?
External wall insulation (EWI) involves fixing a layer of insulation material to the outside of your home, then covering it with a protective render or cladding finish. It is the most effective solution for solid-wall properties that do not have a cavity to fill.
EWI can transform the thermal performance of older homes, reducing heat loss through walls by up to 45%. It also gives the exterior a fresh, modern appearance and can help protect the underlying brickwork from weather damage.
Up to 45%
Heat Loss Prevented
£250–£400
Annual Savings
2–4 weeks
Install Time
£0
Cost to You
Check If You Qualify for Free External Wall Insulation
Enter your postcode to start your free eligibility check.
Benefits of External Wall Insulation
Here's what you can expect when external wall insulation is installed in your home through a government grant scheme.
How It Works
Check eligibility
Enter your postcode to see if you qualify for free external wall insulation through ECO4 or HUG2.
Home survey
A retrofit assessor evaluates your property, wall construction, and overall suitability for external insulation.
Installation
Insulation boards are fixed to the exterior walls, then finished with render or cladding. Scaffolding is erected and removed as part of the process.
Start saving
Your home is warmer, more energy-efficient, and has a refreshed exterior — with immediate savings on your energy bills.
Register Your Interest
Leave your details and we'll contact you about free external wall insulation.
Frequently Asked Questions
Other Insulation Types
Internal Wall Insulation
Insulate solid walls from the inside to reduce heat loss by up to 40% without changing the exterior of your home.
Cavity Wall Insulation
Fill the gap between inner and outer walls to reduce heat loss by up to 35% — fully funded through government grants.
Loft Insulation
Reduce heat loss through your roof by up to 25% — one of the simplest and most cost-effective energy efficiency measures.
Check Your External Wall Insulation Eligibility
Enter your postcode to find out if you qualify for free insulation through government grants.