Here's a few things about insulation you will be better off knowing.
Terra Lana will perform 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:
PERMEABLE CONSTRUCTION MATERIALS
For the full advantage of wool's capacity to breathe (and thereby give further enhanced performance and benefit to your interior environment), we recommend using building wraps , interior linings and paint and plaster systems that are vapour permeable. Vented cavity wall systems rather than direct fixed cladding are also recommended.
Pro Clima is a unique airtight building membrane that complements the breathability of Terra Lana's wool insulation.
TYVEC™ is a permeable (allows breathing) building wrap.
Note that building standards often require construction to allow for ventilation, which may be adequate in the case of some existing buildings with otherwise non-permeable cladding or lining.
R Value Ratings are the measurement standard for 'thermal resistance' as established by BRANZ testing.
The testing is done in bone dry conditions which do not represent the real life moisture levels. Wool insulation continues to operate exceptionally well in very very damp conditions. 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, we expect our wool insulation to outperform by as much as 2 to 3ºC within specific breathable construction systems, due to the insulation also acting like a thermal mass. Really?! More on this»
So it's worth considering the end result when comparing insulation for value, based on R values.
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. More importantly you will then be able to ensure the use of compatible products for lining etc to maximise 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–ﾠwhicheverr is more uniform.
Terra Lana can be installed before or after the floor goes down or the ceiling goes up. However you'll want to decide beforehand as different methods apply to either and may affect which system you use and what dimensions or format you order (ie roll or segment).
if you are looking at 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! For example, 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.
There are 3 different kinds roof / ceiling construction. Each may require a different specification of product and a method of installation. More»
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»
ARCHITECTS // BUILDERS