Insulation in zones 1 and 2 typically require an r value of 3 or 4 while properties in zones 3 to 7 will require an r value of at least 5.
Roof insulation ratings australia.
R value is a measure of insulation s ability to resist heat traveling through it.
Direction of heat flow.
Those in the freezing alpine areas of australia require insulation with at least an r value of 6.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
An uninsulated ceiling can contribute to 35 of your homes winter heat losses and summer heat gains.
All insulation materials that are sold in australia must meet australian standard as nzs 4859 materials for the thermal insulation of buildings even if they are imported.
If you live in cooler climates such as melbourne sydney or adelaide then we recommend upgrading to r5 0 or r6 0 roof insulation.
Ask about recycled content and how easily the product can be recycled after use.
Insulation level are specified by r value.
With australia s rising energy prices we recommend choosing the highest r value you can afford.
Dark coloured roofs absorptance 0 6 r5 1.
We recommend installing a minimum of r4 0 ceiling insulation.
Very light coloured roofs absorptance 0 4 r4 1.
How to install insulation.
By looking at insulation as a long term investment spending a couple of extra hundred dollars on the right insulation now can save you thousands over the life of your home.
Compare the environmental benefits of different products.
Choosing the best insulation for your home is important that s why we recommend you consider all your options beforehand.
Direction of heat flow.
The r value is a measure of the insulation batt s resistance to heat flow also known as thermal resistance.
The higher the r value the better the thermal performance of the insulation.
Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick.
It s recommended that you install foil backed insulation in your roof to an r value of r1 0 or higher.
See the department of energy s doe ranges for recommended levels of insulation below.
In australia ceiling insulation is available in a variety of brands and r values ranging from a r3 5 to r7 0.
R values the r value is a measure of a material s resistance to heat flow known as thermal resistance.
