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How Much Does it Cost to Insulate a House in Auckland?

How Much Does it Cost to Insulate a House in Auckland?

Insulation is a great way to keep the home warm while keeping heating costs down, hands down one of the best investments – rental properties are now also required to have adequate insulation as of 2019.

Insulation costs can vary between $2,400 and $4,300 (floor and ceiling) for a standard three bedroom home (one level) dependant on the choice of insulation grade. The most common insulation type for New Zealand homes if Fiberglass Batts which we’ll go over in this article in relation to costs.

Insulation cost per square metre

Underfloor: R1.5 starts at $50 per metre but price will vary depending on type, R value and ease of access under the house. Allow up to $100 per metre If there is less than 400mm from floor to bare ground, it is recommended to install a layer of polythene over the ground to stop rising moisture.

Ceiling: R2.9 insulation for Ceiling starts at $30 per metre up to $50 per metre (for thicker insulation) – it also depends on ceiling space and access. For older homes that has a ceiling that follows the shape of the roof – access will need to be by removal the roofing material.

Fiberglass Batts

Fiberglass batts are among the most inexpensive ways to insulate your home and also the more popular option (particularly Pink Batts).

How it works: Large, rolled batts of fiberglass are designed to fit the standard distance between studs and they fill the large void and stop air from penetrating the exterior wall.

Types of fiberglass batts: Fiberglass batts usually come in a single variety. The only real variance between one roll to another is overall thickness and color. When installed tightly and securely, fiberglass batts improve energy efficiency by 25 to 30 percent.

What Does R-Value Mean?

R-value is a calculative method referring to thermal resistance. It is also a thermal measurement unit for particular materials in relation to how they insulate.

In New Zealand R-values differ in the regions:

  • R- values for the North Island – Ceiling R3.2, Walls R2.2 and Floors R1.6.
  • On the Central Plateau and in the South Island – Ceiling R3.6, Wall R 2.4 and Floors R1.6
  • For rental properties in Auckland – the legal minimum is Ceiling R 2.9 Underfloor R 1.3

For more information about insulation for rental properties

Check out this PDF from – Insulation Requirements

Insulation is no doubt the best investment any property owner can make, for financial reasons (less heating required) and for controlling temperature/moisture – even if you can’t insulate the entire house, consider insulation the bedrooms first (before winter rolls around).


If you have any questions, feel free to reach out to the Superior Property Services team and we’ll be happy to discuss and answer any questions.


Disclaimer: These cost estimates are based on quotes we’ve sent to past clients and jobs we’ve completed ourselves. This article is offered as a general guide only. The views and information expressed in this article are those of the authors and do not necessarily reflect the official policy or position of any agency in New Zealand. Any person who relies upon any matter contained in this guide does so entirely at their own risk. 

Written by Superior Property Services 


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