Roof Insulation R Value Chart Australia

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

Roof insulation r value chart australia.

The greater the r value the greater the resistance to heat transfer and the greater the insulating effect and subsequent energy savings. The insulation must achieve a minimum r value of 1 0 in zones 1 to 7 and a minimum r value of 2 0 in zone 8. How to install insulation. R value of various materials.

Building code of australia bca. We recommend installing a minimum of r4 0 ceiling insulation. Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick. The insulation must be water resistant and be continuous from the adjacent finished ground level to a depth of 300mm or for at least the full depth of the vertical edge of the concrete slab on ground.

For a very good introductory overview article on r value see r values over at the website of. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Those in the freezing alpine areas of australia require insulation with at least an r value of 6. With australia s rising energy prices we recommend choosing the highest r value you can afford.

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. Our insulation pack calculator will help you work out the area to be insulated and provide a recommendation on the number of packs required for your project. Insulation r value chart australia. The r value is a measure of the insulation batt s resistance to heat flow also known as thermal resistance.

Here is a chart and map that details this information.