Further information on insulation
There are two Australian government websites that give excellent advice on installing insulation in your business or home.
YourEnergySavings.gov.au provides good information on the basics: EnergyCut.info/yes-insulation
YourHome.gov.au has a detailed web page and fact sheet about insulation: EnergyCut.info/yh-insulation-leaflet
YourHome.gov.au also has a very good web page and fact sheet regarding energy efficiency and windows: EnergyCut.info/yh-glazing