Quick Answer
Rammed earth walls require minimal finishing treatments due to their dense, durable nature and ability to withstand various environmental conditions.
Natural Finishing Options
Rammed earth walls can be left unfinished to showcase their natural beauty and texture, but some homeowners choose to apply a protective coating to enhance appearance and durability. A 1-2 mm thick layer of natural wax or plant-based sealant can be applied to protect the walls from the elements and maintain their color. This approach is particularly suitable for earthship homes where energy efficiency and sustainability are paramount.
Additional Finishing Techniques
For a more refined appearance, rammed earth walls can be finished with a thin layer of earth plaster, typically 1-5 mm thick. This can be achieved using a mixture of clay, sand, and water, applied with a trowel or spray gun. To create a smooth surface, the plaster can be sanded and polished, but it’s essential to avoid over-sanding, which can damage the underlying rammed earth material.
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