r-value comparison
Light earth has a lower density than other earth building techniques like rammed earth and adobe or concrete, which means it has a lower thermal capacity, which is the ability to store energy radiated into it by the sun or other radiant heat sources.
But it has far more density than insulating materials like wool or straw.
On the other hand light earth has a much higher R-value than it's denser cousins,
which means it offers far better thermal insulation.
Overall light earth offers the best possible compromise between thermal capacity and insulation - the best of both worlds.
This makes light earth an ideal solution for NZ's mostly moderate climate.
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