DIY

In July 2016, the New Zealand Government implemented amendments to the Residential Tenancies Act which affect all rental properties. All landlords must install or upgrade the ceiling insulation in rental properties to meet or exceed the set levels. Ceiling insulation will contribute to a warmer healthier environment and can be installed as a DIY project.

What insulation do I need to comply?
Insulation levels can vary depending on the zone that your property is located. To see which ceiling product will be suitable for your property, check the tables below.

Once you have selected the product you need you can:

  • Calculate the number of packs you will need.
  • Watch our handy install video to see how quick and easy it is to install Earthwool® glasswool insulation.
  • Purchase your insulation from your local Bunnings store.
Click your zone for recommended insulation products


Our recommendations for insulating with glasswool insulation:

North Island (Zone 1 & Zone 2)

Ceiling Insulation
Thickness of existing insulation* R-Value (m2K/W)
0 – 60mm

 

R 2.9 roll 
R 3.2 Segment or Roll
R 4.1 Segment
** 60 – 100mm R 1.8 roll or R 2.2 Handy roll
*** 80 – 100mm R 1.8 roll or R 2.2 Handy roll
Good       Better       Best
* Based on glasswool
** 60-80mm for masonry wall construction.
*** Timber construction only. 80mm is compliant for masonry wall construction.
Insulation must be installed to meet standard NZS4246

 

South Island & Central Plateau (Zone 3)

Ceiling Insulation
Thickness of existing insulation* R-Value (m2K/W)
0 – 60mm

 

R 3.6 Segment or Roll 
R 4.1 Segment 
R 5.2 Segment
** 60 – 100mm R 2.2 Handy roll
*** 80 – 100mm R 1.8 roll or R 2.2 Handy roll
Good       Better       Best
* Based on glasswool
** 60-80mm for masonry wall construction.
*** Timber construction only. 80mm is compliant for masonry wall construction.
Insulation must be installed to meet standard NZS4246

When you are ready to install Earthwool glasswool read our install instructions here before you start