Roof Insulation R Value Chart Australia

If you live in cooler climates such as melbourne sydney or adelaide then we recommend upgrading to r5 0 or r6 0 roof insulation.

Roof insulation r value chart australia.

Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick. For a very good introductory overview article on r value see r values over at the website of. 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. As discussed earlier in australia the bca has specified the r value requirements for all regions across the country.

The r value is a measure of the insulation batt s resistance to heat flow also known as thermal resistance. How to install insulation. With australia s rising energy prices we recommend choosing the highest r value you can afford. You should of course see the manufacturer provided technical data sheet for the r value of specific 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. Those in the freezing alpine areas of australia require insulation with at least an r value of 6. 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. 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. 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. Here is a chart and map that details this information.

Building code of australia bca.