In principle, the government shouldn’t need to be paying to insulate peoples privacy owned homes.Problem is, many people don't plan to stay long enough in their house.
Some things make sense. But big out lays like windows, solar, battery, heat pump... Still seem reserved for long term houses.
And on your first home, who has that cash?
So you get all these first homes that just get left as is.
Without government support I don't see it changing as much of this is more and more expensive as time goes on
If they really want to move the needle on energy efficiency it needs to be done via regulation. A sensible strategy is to build up the requirements over time. The stick is that you can’t sell the house without meeting the requirements. The carrot is that the quicker you do it, the more you’ll personally benefit.
It’s not just about energy efficiency either, it makes a huge difference to general comfort from it maintaining a more even temperature.