Frequenty Asked Questions

Does Rammed Earth have a high R-Value?


Many people use R-Values to determine which construction materials have the best thermal performance.   Building materials with a high R-Value generally have a low thermal mass which means you must have thermostatically controlled artificial heating and cooling to keep the inside room temperature stable.   

The high energy-efficiency of a Rammed Earth home is not due to its R-Value, because rammed earth actually has a very low R-Value.  The high energy efficiency of a well-designed rammed earth home is due instead to its high thermal mass.


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