Cobworks - your guide to building cob and earth houses
Information on Cobworks, cob houses, cobing, and earthhouses All Cob and Natural Building Workshops provide an exciting opportunity to learn: through hands-on practice, presentations, teamwork and the fun of working as a group. Cobworks Instructors Cob workshop and Cob Building Photos What's an Earth house? Links to other sites about Cob Homes and Natural Building.

WHAT IS AN EARTH HOUSE?

Most materials we use for building an earth house are unprocessed, natur
al 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.
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 Interior of Cob House showing curved  walls and architectural details 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
Light clay homeLIGHT CLAY
Light 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 Bale BuildingSTRAW BALE
Straw 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.
RAMMED EARTHRammed 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.

Natural finishes and plasters.NATURAL FINISHES
Plasters: Clay comes in a variety of beautiful colours.  Clay plasters breathe and work great on straw bale, cob and rammed earth. These are also very easy to apply and work with.
Colour: Natural pigments open the palette for washes, fresco and stains.  The pigment is mixed directly into the plaster or slip and then applied. You are only limited by you imagination. 

 

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