Cavity wall insulation is a fantastic way to significantly reduce the amount of energy you need to heat your home and could save you around £160 a year on your fuel bills.
Generally speaking, your home will be suitable for cavity wall insulation if its external walls are unfilled cavity walls – and their cavities are at least 50mm wide. The masonry or brickwork of your property also needs to be in good condition, and any problems with damp must be sorted out first by a specialist builder.
The process is very straightforward - An installer will drill small holes around 22mm in size at intervals of around 1m to 1.5m from the outside of your home. With specially designed equipment, insulation is then blown into the cavity by the installer.
Once all the insulation is in, the installer fills the holes in the brickwork with matching mortar – so you’ll barely notice them.
Cavity wall insulation can be made out of mineral wool, beads or granules, or foamed insulants.
All three types available in the UK are manufactured according to British standards and verified by the British Board of Agrément (BBA). Your installer will know and choose the most suitable type of insulation for your home.
Total cost of cavity wall insulation Around £250 – including installation Saving per year Around £160 Pays for itself in Around 2 years CO2 saved per year Around 800kg *Estimated figures for a gas-heated, semi-detached home with three bedrooms.
If every UK household that is suitable for cavity wall insulation installed it, we could save more than £860 million and 4.6 million tonnes of CO2 every year.
Cavity wall insulation is NOT a job you can do yourself, and must always be carried out by a registered installer. Almost all works undertaken by ourselves are covered by a CIGA guarantee.