What does R-Value mean? How much do I need?

Insulation R-Values for Australian Homes

The R-Value of thermal insulation measures how resistant the insulation is to heat transfer. A higher R-value means a higher insulating rating – i.e. a higher resistance to heat transfer. New buildings are general specified at the design stage as requiring a certain R-value.

Choosing an R-Value

If you are building a new home then the minimum R-values are included in the energy report. These are the minimum R-values that you need to install in order for your house to receive a Certificate of Compliance (COC). If you live in an existing home with no thermal insulation installed in the ceiling, then installing insulation of any R-Value will in most cases significantly reduce the amount of heat entering and leaving your home.

Upgrading to a Higher R-value

The rising cost of energy in Australia means that many home owners are choosing to invest in higher R-values than those specified on their energy report. A well-insulated home costs less money to heat and cool, emits less greenhouse gases and provides year round comfort.

If you live in Melbourne, Sydney or Adelaide then we recommend R2.5 for the external walls and R5.0 or R6.0 in the ceiling. If you live in Brisbane, Perth or northern NSW, then we recommend a minimum of R2.0 wall insulation and R4.0 ceiling insulation.

Midfloor and Internal Wall Insulation

Installing R2.5 acoustic insulation in the internal walls and between floors helps to create a more peaceful home. You can also install R4.0 or higher ceiling insulation between floors. These batts are so thick that they will help to stop sound transfer, as well as improve the thermal performance of your home. To discuss your recommended insulation R- value needs, please contact us.

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