Roof Insulation R Value Chart Australia

With australia s rising energy prices we recommend choosing the highest r value you can afford.

Roof insulation r value chart australia.

Building code of australia bca. We recommend installing a minimum of r4 0 ceiling insulation. As discussed earlier in australia the bca has specified the r value requirements for all regions across the country. 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.

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. The greater the r value the greater the resistance to heat transfer and the greater the insulating effect and subsequent energy savings. If you live in cooler climates such as melbourne sydney or adelaide then we recommend upgrading to r5 0 or r6 0 roof insulation. 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. 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. Here is a chart and map that details this information. 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. The r value is a measure of the insulation batt s resistance to heat flow also known as thermal resistance. Roof insulation r value ranges from r2 5 to r7 0 and are between 120mm and 290mm thick. R value of various materials.

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.