Because insualtion is a BIG topic it is broken down into relevant areas:

Ceiling insulation

In Tasmania ceiling insulation uses mainly bulk insulation. Bulky material that can trap air close to the ceiling surface. The total ceiling insulation system ideally incorporates a reflective layer, usually in the way of reflective sarking or building wrap, usually placed under the roofing material.
 

Wall insulation

Most tasmanian homes do no have any wall insulation. It is often a difficult to retro install insualtion but techniques are improving and are encouraged.

Floor insulation

Sub-floor insualtion is often straight forward to install if the sub floor cavity is accessable.