Insulating walls of new homes is very effective. Insulating your external walls can save up to 25% of heat transfer in and out of your home, providing a more comfortable & energy efficient environment. Insulation essentially acts as a barrier to slow down this process and makes a substantial different to the temperature you will feel inside, meaning you can live more comfortably. Unlike other forms of heating and cooling control, insulation requires no maintenance or replacement. It will work as well as the day it was installed years from now. We use Bradford Gold Wall batts which is Australia made and 100% Bio-Soluble.