Cavity wall insulation works by injecting a substance into the space between the inner and outer levels of brickwork in the external walls of your home. There are many different types of substance that can be used to do this, but they all work by combining with the captive air in the wall cavity and becoming a filling to decrease the amount of heat escaping from your home.

Cavity wall insulation is a good way to significantly reduce the amount of energy you need to heat your home, and reduce carbon emissions.

The average house could reduce heating costs by 15%. In fact, between 2002 and 2005 around 800,000 households installed cavity wall insulation.

It is estimated that this will have saved nearly 400,000 tonnes of CO2, enough to fill the new Wembley Stadium 47 times.

If all the houses with unfilled cavity walls had them filled, the energy saved could heat 1.7 million homes each year.

Around a third of all the heat lost in an un-insulated home is lost through the walls. If you have cavity walls, insulating them will significantly improve the thermal efficiency of your home and it could save you –around £90 a year on your fuel bills.

The cost of cavity wall insulation has never been lower as it is subsidised by the Government. For an average house the cost of installation is about £500- . Making the return on investment around only 5 years. Saving 750KGs CO2 per year.

Cavity wall insulation is injected into the cavity from outside the home, it takes typically two to three hours to insulate a three bed semi and typically costs under £500.