In 2019, the Johnson family from Manchester reduced their energy bills by 30% after installing cavity wall insulation. Their 1970s home lost heat through uninsulated walls, making winters unbearable. Through a government grant, they had insulation installed within hours, dramatically improving warmth and comfort. Not only did their heating costs drop, but they also reduced their carbo... https://www.simplegreenenergy.org/cavity-wall-insulation/