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Great British Insulation Scheme Offer

Get cavity wall insulation

Good cavity wall insulation can cut your heat loss by up to 33% and your energy bills by up to £405 a year(1).

Don't miss out. Apply now under our Great British Insulation Scheme!

What is cavity wall insulation?

Did you know that cavity wall insulation is a quick and easy way to make your home more energy-efficient? Basically, they inject insulation material into the space between the walls from the outside by drilling holes in the walls. The common materials used are mineral wool, polystyrene beads, or polyurethane foam. It's super long-lasting, too, up to 42 years! Plus, it keeps your home cosy in the winter.

Why choose EDF?

EDF is a reliable option when it comes to installing energy-efficient measures. We work with a network of qualified installers who provide cavity wall insulation across the UK. From 2022, we have enhanced the energy efficiency of nearly 25,000 homes across the UK. You can trust us to help you improve the energy efficiency of your home.

I have noticed a huge difference in the warmth of my home. Before I was having the heating on not just high during the day but also I had to keep it on through the evening during very cold winter nights. This was extremely expensive.

Mr H,

Why is cavity wall insulation a good idea?

Insulating the cavity space between the outside and inside wall adds a barrier to stop the cold from coming in and heat from escaping.

Save up to £455 on energy bills(1)

Less heat escaping means less energy used to heat your home, saving you money.

Better for the planet

Reducing heating energy usage cuts carbon emissions.

Better EPC rating

Your home will be more energy-efficient and more attractive to buyers.

Reduce heat loss

Keep your home warmer using less energy.

How can I tell if I have a cavity wall?

There are some common ways to tell if your home has a cavity wall:

  • If your home is built after 1920 it will have cavity walls
  • It has walls more than 260mm thick
  • It has brickwork like one of the picture examples below
Cavity wall insulation - Installing cavity wall insulation
Cavity wall brick pattern example 1
Cavity wall brick pattern example 2
Cavity wall brick pattern example 4
Cavity wall brick pattern example 3