Cavity wall insulation is the best way to prevent heat from escaping your home, and it can save you up to £1200 a year. In addition, the insulation will increase your property value, as buyers are looking for energy efficient homes. It also helps to reduce your carbon footprint.
To insulate your cavity walls, a specialist approved contractor injects one of the following materials into the gap through small drilled holes:
Wet spray blown cellulose
This is a green option and contains a high proportion of recycled material. It’s treated to resist insects and make it flame-retardant, but this does mean it can emit VOCs (volatile organic compounds). This type of insulation is blown in using water and is less dense than mineral wool or EPS beads. It can be a little messy and requires a longer installation time. You should get quotes from multiple companies before choosing a supplier, as prices vary. Cavity wall insulation cost