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External Wall Insulation


Wall Insulation

  • Save up to 15% on heating and cooling energy
  • Reduce your greenhouse gas emissions
  • Rely less on heating and cooling systems
  • Stabilise year-round indoor temperature

Quick Install Tips

  • Avoid leaving gaps in insulation
  • Fill small cavities with leftovers
  • Don’t compress the insulation
  • Insulation shouldn’t lean on bricks
  • Strap or string where needed
  • Use a sharp bladed knife

Quick Delivery

Pricewise Insulation are the wall insulation specialists. We deliver to building sites and homes right across New Zealand within 2-4 business days. For urgent deliveries please give our team a call on 0800 697 742.


Wall Insulation 

Thermal wall insulation acts as a barrier to heat flow and is needed to keep your home cool in summer and warm in winter. Properly installed insulation can reduce greenhouse gas emissions and heating bills by up to half, as well as improve the overall comfort of your home.

Key tips for installing wall insulation

The main thing to keep in mind when considering installing wall insulation, is that once the walls are lined, the job is done, and you won’t be in a hurry to dismantle the wall to redo the wall insulation. So it’s imperative to ensure that

  1. The correct R-value is installed the first time
  2. The insulation is installed with a neat finish, with minimum air-gaps.

At Pricewise insulation, we recommend upgrading your wall insulation to at least one ‘R-value’ higher than the minimal mandatory specifications on your report. The required total R-value for the building fabric of your home will vary depending on your climate zone.

Upgrading from R2.2 to R4.1 external wall insulation

Upgrading to an R4.1 wall insulation batt will improve both the thermal and acoustic performance of your home. These batts are rigid and fit snugly between the wooden joists to achieve an optimal thermal finish. R2.6HD Knauf Earthwool is a high density product with higher acoustic ratings than your typical R2.2 or R2.4 wall batts.

Which insulation brand is best?

Earthwool vs Pink Batts vs Bradford Gold

In the end the most important consideration is what R-value to use, not the brand. Pink Batts, Knauf Earthwool, Green Stuf and Bradford Gold are all good quality brands, each with their own benefits.

The main thing to know is that products with the same R-value all have the same thermal performance if installed as specified. An R2.0 Pink Batt will provide the same thermal resistance as an R2.0 Autex Green Stuf Pad or an R2.0 Bradford Gold Segment.

In saying this, we do not recommend brands such as Ecowool Insulation that are manufactured in Asia. We find these are inconsistent in quality and irritable to the skin.