Jim Bunce thought he was doing the right thing for his purse and the planet: in 2022, as fuel costs soared, he and his wife decided to improve the energy efficiency of their house.
They discovered that the government had endorsed spray-foam insulation, a quick and unobtrusive technique by which liquid foam is spray-gunned into roof spaces and walls. Their loft was successfully treated at a cost of £2,800 and their gas bills duly fell.
