Top 5 Building Performance issues/problems, with air tightness, insulation consistency and ventilation. In this video we’ll show you what we consider 5 massive impacts to Building Performance in residential homes/units in Australia. These issues have annoyed us for many years so let’s have a chat about them, and explain why we struggle so much with these common features and practices! There are many more, which we haven’t mentioned and no doubt in future videos, we will cover them. Feel free to comment on other issues you may have noticed in your home, that impacts your building performance for heating and cooling.