Can you tell me if an earth plaster can be used on the exterior of an earthbag building in a wet climate, or would I have to use a stucco cover for the sake of waterproofing the walls?
An earthen plaster can be used on the exterior of an earthbag building, but it might be advisable to stabilize the plaster some with Portland cement or emulsified asphalt…or plan on repairing the plaster regularly. Unless the walls are exposed to direct rainfall, it should not be necessary to waterproof the walls. Q: We have had a friend level a driveway and house pad for us with a backhoe and discovered a very sticky substance in the volcanic soil that seems to be clay-like. You can squish it together, bend it and it holds its form very well. We are planning to make a cob mix with it to put on the inside walls of the earthbag dome home and create an earthen floor. Do you think that would work, this clay-like substance mixed with straw and sand and water? A: The soil that you describe does indeed sound like clay, which is one component of good cob, adobe or rammed earth. But you really only want about 15-30% clay, with the rest sand for a good mix. You can figure out the relative % o
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- Can you tell me if an earth plaster can be used on the exterior of an earthbag building in a wet climate, or would I have to use a stucco cover for the sake of waterproofing the walls?
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