BrianAJackson/Getty Australian households are under immense financial pressure – and rising energy costs are a major reason why. While policy makers and system planners have focused on ways to produce more energy – such as increasing renewables like solar – they’ve paid less attention to strategies to encourage people to save power. House insulation – or large squares of bulky materials such as polystyrene and wool that are installed in roof cavities or walls – is one of the most practical ways