Cavity insulation is an easy and cost-effective way to improve the thermal performance of your home, reducing heating costs. It is installed by injecting insulating material into the space between the outer and inner walls of your property. This can be carried out from the inside or, in some instances, from the outside, with a specialist piece of equipment. This process leaves little to no mess and is quick and efficient. It also preserves the appearance of your existing brickwork, and doesn’t require the drilling of holes into your external wall.
The most common cavity wall insulation materials are rock wool or blown in expanded polystyrene foam. They are available in both full and partial fill options. A full-fill option covers the entire cavity with the insulation. The latter is normally applied using a bespoke system to ensure that the material doesn’t get stuck behind the wall ties.
This is where insulated concrete forms (ICFs) come in handy. They are made of EPS blocks that are stackable and designed to make energy-efficient construction easier. They are ideal for new-build homes and extensions.
During cold weather, uninsulated external walls allow heat to escape, meaning you will need to use more fuel to keep your house warm. Having your cavities filled with the right type of insulation reduces this energy loss, saving you money on your heating bills and helping to reduce carbon emissions. In some cases, this can save you up to PS10,000 through a Green Homes Grant.