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WHAT IS AN EARTH HOUSE? Most materials we use for building an earth house are unprocessed, natural products such as sand, clay, straw and recycled materials. Earth is a abundant resource that can produce beautiful and responsible homes. The following are some examples and explanations of earth homes. |
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COB
Cob is a mixture of sand clay and straw- wet enough to mold yet dry enough to build up without forms. Walls are built up to be monolithic, which gives them greater strength in earthquakes. Cob invites your
creativity to be expressed in the process of building your space: living
space, meditation space, work space, sleeping space, play-space. Build
curved walls, arches, and niches. And who says that walls are flat? All
it takes to make the step towards your dream space is a fairly short learning
process, to gain a sense for the material. A fun way of learning is to
participate in a workshop, where you work on a structure and learn hands-on,
with opportunity to discuss your ideas with others, pick up knowledge
of the whole process and meet new friends |
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LIGHT
CLAYLight clay comes from an old German clay technique. Loose straw is tossed into a clay slip and then stuffed into temporary forms for infill of a wood frame structure. Ideal for plasters; it is light weight, insulative, non load bearing and great for soundproofing. |
STRAW
BALEStraw bales are stacked like blocks to form the walls of a structure (load bearing or infill for post & beam). The bales are then covered with plaster. Straw bale walls are highly insulative (up to R40) and sound proof. They also work great in combination with cob. |
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RAMMED EARTH
![]() This is the process where sand, clay, silt & gravel are mixed on the ground with 5% - 10% cement. A small amount of water is added and is thoroughly mixed with a roto-tiller. This semi-dry mixture is then dumped into forms which vary 1 and 2 feet in thickness. This is then rammed either by hand or a power tamper. When the desired wall height is reached, the form is removed and set up adjacent to the previous wall. The process is then repeated. A continuous reinforced concrete bond beam ties the wall together. |
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