Cavity wall insulation is one of the most cost effective ways of reducing you annual heating bills as well as reducing your CO₂ emissions. The highest percentage of the heat lost from your home is through the walls – 35 per cent is lost through walls without insulation compared to 25 per cent that is lost through the roof, 25 per cent through the windows and doors and the remaining 15 per cent through the floor if all are not insulated.

Cavity Wall Insulation Cost example

So by having your cavity walls insulated you’re going to save money in the long run. According to approximate figures from the Energy Savings Trust, based on a gas-heated semi-detached home with three bedrooms, you can make annual savings of around £115.

Cavity wall insulation instalment in a house of this size would cost in the region of £500, so you’ll have paid off the cost of the installation in just over four years.

But that’s without subsided costs that are offered by the major energy providers under the Carbon Emissions Reduction Target, and without a cavity wall insulation grant. So you could ultimately pay off the price of the installation is an average of two years according to the Energy Saving Trust.

You’ll also be saving around 610kg of CO₂ emission per year, too.