Roof Insulation R Value Chart 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.

Roof insulation r value chart australia.

Notes on the r value k values of different forms of asbestos. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Insulation level are specified by r value. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.

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. The higher the r value the better the thermal performance of the insulation. What r value do i need. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

R value of various materials. 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. Notes to the table above.

R value is a measure of insulation s ability to resist heat traveling through it. 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. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

As discussed earlier in australia the bca has specified the r value requirements for all regions across the country. Insulation r value chart australia. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. 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.

Building code of australia bca. 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. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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.