Time to insulate!

Time to insulate!

As we head into another winter, it’s time to touch on the ever pressing subject of wall & ceiling insulation.

The insulation area has been tainted somewhat recently in australia due to the failure of the insulation scheme.  That doesn’t mean that it isn’t important though.

Keep in mind in australia we run on a different ’R’ rating to others, so when buying insulation from a supplier overseas request the R rating for australia.  You may think your buying R18 but infact you may be buying something a lot less substantial.  Our most common rating used are walls – R2.0 and ceilings R4.0

Wether your building a new home or renovating an existing home wall & ceiling insulation is the BEST investment you can make before installing plaster.  Just keep in mind with walls, you cannot get to this area again, and while there are some ‘retrofit’ examples in australia and around the world, nothing beats installing bulk insulation in a wall before plaster is installed.

Your roof cavity can be done at any time, there is no better time than the present!! It’s reasonably cheap and easy to do. Always use R4.0 bulk insulation or better and keep gapping between the batts to a max of 5%.  Always insulate your roof over the top plate.

Here is an example of a wall before it has been fitted with batts.

stud wall without insulation

Here is an example of a wall after it has been fitted with batts. – Doesn’t it even look warmer!!!

stud wall with insulation

When insulating your new or existing home it’s important to insulate correctly, if you end up with even 5% air gap in the insulation it will decrease it’s usefulness dramatically, likewise if the insulation is installed with crushing it will also dramatically reduce it’s usefulness.  If you consider the house as the core, you want to protect the core with insulation so there is a continuous barrier from the core to the outside world.

Below is an example of how insulation should look inside the home:

house insulation example

I hope everyone has a warm winter, and remember when insulating you may feel that it’s a big effort and expense at the time, but it WILL save you money in the long run!


  1. Insulation for residential or commercial properties has so many benefits from temperature comfort, to noise reduction and energy efficiency. It is well worth the investment, thanks for sharing your blog.

  2. A post that finally declares that here in australia we use a different R rating system. America has much higher “number” as there value refers to how long it can resist heat . So say if it the R-value is 10 this means it can resist temperature change for ten hours. I guess here in Australia we like to be different.

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