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Cavity wall insulation is the most cost effective way to warm your home. 

It's a quick, hassle-free way of insulating your home and reducing your energy bills. But is it right for you and your home?  Find answers to your questions about an excellent method to save money and generate free energy.

How much money will I save?

The insulation can dramatically improve your home’s heat retention and create a warmer, more efficient home. Up to 45% of a property’s heat can escape through cavity walls, so a significant amount of your money is going to waste. The average property will save £150 a year with cavity wall insulation, although obviously this can be variable depending on a number of factors.

What is a cavity wall?

Cavity walls are two walls with a gap in between, called the cavity. The outer wall is often made of brick while the inner wall brick or concrete. Houses built after the 1920s tend to have cavity walls, making them good candidates for cavity wall insulation.

How does it work?

Cavity wall insulation works by filling the cavity space with material that reduces heat loss by stopping the air moving around inside the cavity (air is still the actual insulator). This can substantially reduce heating costs. 


What's the process, and how long does it take?

To insulate your home, our installation partners will drill a series of small holes into the outside wall of your property. Superbeads or blown fibre are blown in between the gaps in your walls. The holes are then filled to ensure your home is water-tight. The process is quick and easy - most installs only take a few hours to complete.

How long does it last?

Cavity wall installs come with a 25-year guarantee - which is arranged by our installation partners.

Qualifying Criteria...

Council Tax Bands A-D:

If you live in a property that's rated A, B, C or D for Council Tax and your total floor area is over 72m2, you will qualify to have your cavity wall insulation completed free of charge


If you receive any qualifying benefits or qualify for local authority FLEX, homeowners may also qualify for new heating controls (where required) to be fitted completely free of charge. 

Qualifying Benefits:

Pension Credit

Child Tax Credits 

Working Tax Credits

Universal Credit

Income Support

Housing Benefit

Income-Based Employment and Support Allowance

Income-Based Job Seekers Allowance

Child Benefit

(with earnings threshold)


If you're NOT in receipt of benefits and you live in an area where your Local Authority operate a FLEX scheme, there are 2 different routes to access ECO/GBIS funding:

Route 1: Household Earnings

Household earns less than £31,000 (gross)


Route 2: NHS Referrals

NHS referrals via your GP or NHS Trust who believes you are vulnerable to the affects of living in a cold home because you have one of these health conditions:



Limited Mobility


See Local Authority areas here

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