Properties with good insulation require less energy to stay warm than those with poor insulation, so on the whole, insulation can play a key part in achieving an energy efficient home.
Well insulated houses will have a lower heat demand, which in turn will lead to cheaper quotes to purchase and install new heating systems, as well as reduced running costs over time.
For further information, and plentiful help and advice on improving energy efficiency, take a look at our blog, How Can I Make My Home More Energy Efficient?