Cordwood with Cob Mortar is “Cobwood”

Cordwood Construction

We had the distinct good fortune to participate in a Cordwood with Cob Mortar Workshop at Kinstone Permaculture Academy.  Building a Cobwood Entrance Center for the school was the order of the day.   A kidney-shaped grade beam had been put in place and the cobwood rises off a “gneiss” stone stem wall.

The soil is first tested for clay content and the workability and firmness of the clay is determined by rolling a piece of clay for stiffness.  Note the sign which gives the cob mix proportions (2 sand, 1 clay, 1 sawdust, straw).

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Next the ingredients are mixed and stomped.  This can be a tedious process or a fun dance time:0)

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A loaf of the cob mixture is laid down like a regular cordwood mortar bead.  However the cob mortar beads are thicker.  Here we are using 5 inches of cob on the inside and…

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