Those in the freezing alpine areas of australia require insulation with at least an r value of 6.
Roof insulation ratings australia.
Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick.
Dark coloured roofs absorptance 0 6 r5 1.
See the department of energy s doe ranges for recommended levels of insulation below.
Choosing the best insulation for your home is important that s why we recommend you consider all your options beforehand.
Insulation level are specified by r value.
The higher the r value the better the thermal performance of the insulation.
The r value is a measure of the insulation batt s resistance to heat flow also known as thermal resistance.
Compare the environmental benefits of different products.
Light coloured roofs 0 4 absorptance 0 6 r4 6.
The greater the r value the greater the resistance to heat transfer and the greater the insulating effect and subsequent energy savings.
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.
Very light coloured roofs absorptance 0 4 r4 1.
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.
It s recommended that you install foil backed insulation in your roof to an r value of r1 0 or higher.
Direction of heat flow.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
How to install insulation.
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.
Direction of heat flow.
R values the r value is a measure of a material s resistance to heat flow known as thermal resistance.
Ask about recycled content and how easily the product can be recycled after use.
With australia s rising energy prices we recommend choosing the highest r value you can afford.
R value is a measure of insulation s ability to resist heat traveling through it.
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.
