Cavity wall insulation

Grants for Cavity Wall Insulation

Many modern homes have two walls - an inner and an outer wall. The space between them is known as the cavity gap, and it can be filled with insulation to make the house more energy-efficient and save money on heating bills.

If you live in a house with cavity walls, you may be eligible for free insulation under the Eco scheme. This will help keep your home warm in the winter and cool in the summer.

If your house was built after 1930, it probably has cavity walls, but it may not have the insulation it needs to be energy-efficient. This means you could be losing heat and wasting energy, which can be costly and harmful to the environment.

On the other hand, if your house was built before 1930, it likely has solid walls, which means there's no cavity gap to fill with insulation. However, there are other options available to make your home more energy-efficient, such as external wall insulation or internal wall insulation.


The properties made with uninsulated cavity walls are suitable for eco grants, Our specialists' will create drill holes outside in the mortar joints of walls then inject polystyrene beads insulation through the holes until the cavity becomes filled.

Suppose you are in any doubt about whether you could have cavity wall insulation. We can carry out a free survey to determine if your walls are suitable for cavity wall insulation.

All our installers will be a member of the Cavity Insulation Guarantee Agency (CIGA), and all cavity wall insulations have a 25-year guarantee (independent insurance backed).

After your cavity walls are insulated, the only variation you should notice is that your home is more comfortable and more economical to heat.


  1. Please take a minute to complete our online eligibility form or call us 
  2. We’ll contact you to arrange a suitable date to complete our free energy survey.
  3. Once qualified, we will arrange the installation of your free eco measures with our fully qualified engineers.