With australia s rising energy prices we recommend choosing the highest r value you can afford.
Roof insulation ratings australia.
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.
The greater the r value the greater the resistance to heat transfer and the greater the insulating effect and subsequent energy savings.
We recommend installing a minimum of r4 0 ceiling insulation.
Dark coloured roofs absorptance 0 6 r5 1.
Choosing the best insulation for your home is important that s why we recommend you consider all your options beforehand.
Direction of heat flow.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
Those in the freezing alpine areas of australia require insulation with at least an r value of 6.
Direction of heat flow.
See the department of energy s doe ranges for recommended levels of insulation below.
Compare the environmental benefits of different products.
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.
How to install insulation.
It s recommended that you install foil backed insulation in your roof to an r value of r1 0 or higher.
Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick.
R values the r value is a measure of a material s resistance to heat flow known as thermal resistance.
Very light coloured roofs absorptance 0 4 r4 1.
An uninsulated ceiling can contribute to 35 of your homes winter heat losses and summer heat gains.
The higher the r value the better the thermal performance of the insulation.
Insulation level are specified by r value.
If you live in cooler climates such as melbourne sydney or adelaide then we recommend upgrading to r5 0 or r6 0 roof insulation.
Light coloured roofs 0 4 absorptance 0 6 r4 6.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
In australia ceiling insulation is available in a variety of brands and r values ranging from a r3 5 to r7 0.
R value is a measure of insulation s ability to resist heat traveling through it.
