Do I need cavity wall insulation?
It is safe to assume that if your home was built after the 1920’s there is a high chance it has got cavity walls and unless it was built within the last 20 years those wall cavities are probably empty. Filling them with cavity wall insulation could be a very cost effective way of retaining heat in your home and save on your energy bills.
Around one third of the heat loss from most homes happens through the walls of the house. Cavity wall insulation could save you up to £160 a year in heating bills.