Cob Building, Summer 2015

Getting there…

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Corbell Cobs

To make the arch over the windows and doors, we need to use super strong fiber straps made of sticky clay and straw. The arches distribute the weight of the wall evenly over the openings.

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Corbells
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Grab a handful o' straw, all facing the same direction.
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Spread it out in one thin layer.
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I scooped out clay directly from the slaking bin.
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Spread it all out over the straw.
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Rollout up and squash and squish and squish it.
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Slather the outside of it liberally with gooey clay.
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And, Taadaa! Super strong corbell cob for arches and shelves!

Rocket Stove, Go!

Part 3: Insulation and the Barrel

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Insulation: perlite & clay slip
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Pour insulation between stack and hardware mesh.
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Burn the paint off the barrel.

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Up-end barrel on stack.

Under that slab of marble is the manifold. It’s a space between the bottom of the barrel and the first length of stovepipe.

Here is a better picture. And another. From people who did a better job of remembering to take photos.

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The feed (fire box)
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Stovepipe snaking through future cob furniture
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A "tee" in the pipe for ash clean out

I left for the day and returned to a blazing fire in the cob house! Pah!

The Coffee Nook

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Our first batch of cob for the season started the coffee nook. The large, opening, SSE-facing window will be set in a small wall of cob atop a salvaged marble sill. In front of that, a fir slab counter. The foot of the bed (nest-shaped and heated from the exhaust of the rocket stove) will serve as a bench. A”coffee rocket” will be built right into the wall next to the window. So, sliding out if bed for a cup of coffee is that: just a slink under the covers to emerge in the other side, light up the rocket, and grind the beans.