Cavity wall insulation

We're offering free cavity wall insulation for all eligible homeowners.

Get started by calling us on 0330 400 1083.

Get cavity wall insulation

The most effective way of preventing heat loss in your home is with insulation. If you’re eligible as part of our Affordable Warmth Scheme, we’ll install cavity and loft insulation free of charge, and you don’t need to be an E.ON customer to benefit.

25-year guarantee

Our work is covered by the Cavity Insulation Guarantee Agency (CIGA).

Save on heating

Fill the gaps and you could save yourself up to £1501 a year on your heating.

Quick and easy

We’ll get most installations done in half a day.

Just right

Keeps your home warm in the winter and cool in the summer.

How can you tell if you have cavity walls?

If your home was built after the 1930s, then it’s likely that you do. You’ll see a regular pattern of bricks laid on their long side.

But don’t worry, we’ll check to see if you have cavity walls or cavity wall insulation when we come to see you.

Is it messy to install?

Not at all. It’s straightforward and mess-free when done by a cavity wall technician.

Our technicians drill 2cm holes into the outer wall, then inject it with either bead or fibre cavity insulation.

Once the cavity is full, the holes are filled in to match the existing wall.

Insulation without the price tag

We’re offering free cavity wall insulation for all eligible homeowners as part of our Affordable Warmth drive and the government’s Energy Companies Obligation (ECO) scheme.

Good news if you’re not eligible

If you're not eligible for free insulation, we can still keep your home cosy from as little as £3302.

Get started by calling us on 0330 400 1083.  

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The important stuff

1 Savings information is provided from the Energy Saving Trust website and based on an average semi-detached household. Savings will vary depending on the size and thermal performance of your home. Figures are based on fuel prices as of April 2019. 

2 Installation cost is subject to survey and based on installing cavity wall insulation on a mid terrace two or three bedroom gas heated property.