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Terra Lana will do well regardless, but to make the most of all it's advantages it's best to consider what other building materials you're using it with and what method you are installing it by:



To benefit from the advantage of wool's capacity to breathe, we recommend using building paper, cladding and lining that will best allow this.


Some common cladding materials that allow your walls to breathe are:  Timber (weatherboard, board & batten, ply), Oamaru Stone, and Brick.

Pro Clima is a unique airtight building membrane that complements the breathability of Terra Lana's wool insulation.

Tyvec is a permeable building paper.


Note that building standards often require construction to allow for ventilation, which may be adequate in the case of some existing buildings with non-permeable cladding or lining.



R Value is NOT all there is to it. R Value Ratings are the measurement standard for 'thermal resistance' as established by BRANZ testing. However, the direct thermal resistance of an insulation is not all there is to it's performance. When compared to synthetic insulations of the same R Value rating, our wool insulation has been shown to outperform by as much as 2 to 3ºC.  Really?! More on this»


So it's worth considering the end result when comparing insulation for value, based on R values. There are also advantages of other properties to consider, such as Terra Lana's longevity or ability to remove toxins from the air.



If you are building, it pays to specify Terra Lana early on in the design//construction process.

By doing so, things such as wall cavity thickness and stud spacing can be optimised for best performance and ease of installation. You will then also be able to consider the use of compatible products for lining etc to optimise the performance and benefits of your insulation for the resulting living space.

Insist on Terra Lana to start with to provide lasting, exceptional performance, value and an environmentally responsible solution.



There are three different ways to install Terra Lana ceiling insulation into a truss roof space. Decide which is most suitable for your situation so you can order the right product.

We recommend our proprietary double layer system.  By achieving the R value rating required using two thinner layers of insulation instead of one thicker, a complete ceiling coverage is achievable, as well as the elimination over any gaps.  The end result gives unparalleled performance and is the most efficient thermal barrier for the product used. More »



You can buy Terra Lana insulation in long blanket rolls or in packs of precut segments.  There are advantages to either depending on where they are being installed.  If you have irregular stud or rafter spacings, you may be better with a roll.  The blanket can be easily ripped by hand to measure as you go.

If the majority of wall or ceiling cavities are a uniform width, the segments will be the way to go.  If you are designing a house, you can more easily work out the width amounts you'll require and order from us precut – too easy!



Wall insulation can be installed with the 'grain' running either vertically or horizontally.  That means you can order width to fit stud spacing or to fit dwang spacing –ᅠwhichever is more uniform.



if you are checking out what's on the market, don't get fooled by missing information. Some products claiming to be natural or environmentally friendly are often manufactured with processes or ingredients that are not! Most insulation requires a bonding agent to hold the fibres together, this is often an industrial resin with toxic properties. Our insulation is blended with polyester which is thermally bonded (slightly melted) to help stick it together. Polyester is the second most common clothing material after cotton and poses no health risks.


Terra Lana wool blend insulation contains no harmful substances. It is non-irritant, non-allergenic, non-toxic and odourless. It uses pure and recycled wool that has been treated for insect resistance. Bioassay tests undertaken by AgResearch give satisfactory insect resistance to Tineola Bisselliella (common clothes moth). It is also naturally resistant to mould, so no chemicals needed there.



Another factor to consider in comparing insulation performance is the fact that our wool insulation outperforms synthetic insulations of the same R Value rating!  So you will be getting up to 2 or 3ºC better results with the same rated product.  That's worth considering. Really?! More on this»



There are 3 different climate zones in New Zealand, each with different building code standards for the required insulation R Value rating within each zone. More»



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