The higher the R value, the greater the resistance to heat transfer, and the greater the energy savings. Different products with the same R value will provide identical insulation performance. Remember, it is not the thickness of the product or the type of material that counts, but the R value. Most homes can easily have insulation installed in the ceiling and under timber floors if crawl space is available. Walls can be insulated during recladding or replastering.
Specialised products are also available to insulate existing walls.
Government regulations now specify that all new homes and extensions built in Victoria must have minimum insulation levels in both walls and ceilings. These levels are specified in the table below. It is recommended to achieve higher levels of insulation especially in colder climates.