R5.0 Ceiling Insulation


Benefits of R5.0

  • Reduce energy waste
  • Improve energy efficiency
  • Increase comfort
  • Improve health and wellbeing for occupants
  • Save money on energy bills
  • R5.0 insulation is a once-off investment with decades of benefits


Ensure a snug fit

Insulation batts should fit snugly between the joists without being compressed. Leaving gaps in insulation will reduce the effectiveness of insulation, however be sure to leave safety clearances where needed. Check out our DIY tips and videos for more information.


Perfect for cooler climates

Up to 35% of your heating and cooling energy can be lost through the roof unless your ceiling is properly insulated. R5.0 ceiling insulation is recommended in cooler regions including Victoria, South Australia and Tasmania.



R5.0 Insulation for Roofs and Ceilings

If your ceiling was insulated many years ago, there is a good chance that what was installed has lost some of its effectiveness. Even if the insulation was considered a good quality product at the time, it might be delivering less thermal benefit than it was originally specified to deliver.

Most types of bulk insulation will settle and compress over time. Because insulation is full of tiny air pockets, the more it is compressed, the less effective it becomes in reducing the transfer of heat. So if, for example, an R4.0 was installed decades ago, it may be providing you with a real R-Value of less than that, maybe 2.5 or 3.0 at the most.

Topping Up v Replacing Ceiling Insulation

If you do have a layer of old insulation in your ceiling and you’re looking to upgrade, the question is often asked: is it essential to get rid of the old insulating material first, before installing the new insulation?

Before deciding whether to get a company to vacuum out your ceiling space or whether to top up the existing insulation, consider the following points:

  • all old insulation will have some R-Value
  • how much effective R-Value it still has will depend on how well it was installed originally, and how much it has compressed over time.
  • old insulation is typically extremely dusty and will often smell
  • It’s more difficult to get a neat finish when topping up old insulation with new insulation
  • New insulation (at least the brands we sell) does not attract vermin, however many older insulation types do become nests for vermin.

If your house has properly installed insulation but requires a higher R-Value, topping up with new insulation may be a viable cost saving alternative.

However, if the insulation that was previously installed is distributed unevenly, is of poor quality, or has been soiled or damaged by vermin, we recommend cleaning out the ceiling and replacing it with new insulation.