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The wall in March 1999. It had already been standing for a couple years. The left side is finished with lime-over-earth, the right with earth-over-earth (except for the rear portion of the wall, not visible, which also had a lime finish). Various test mixes of earth plasters, some with stabilizers of different types, form the substrate. (This wall wasn't intended to be a moisture test wall - it was a plaster recipe test wall.)
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 2 |
The wall in September 1999. The lime-finished section has been given a "spatterdash" coat in recent months - lime plaster flicked onto the wall with a special tool. (The two jars on the wall are sun-clarified cold-pressed hemp oil for earth-plaster stabilization experiments.) Take note of the "seam" near the center of the earthen-finished side on the previous two photos before viewing the following one.
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 3 |
Delamination of an earthen plaster from an earthen plaster. There are ways to avoid having this happen to you. Principally, make sure there's a good physical key for subsequent coats in any scratch coats, don't use coats with different stabilizers and admixtures over one another, and work the coats well into one another.
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 4 |
| A "dribble-edge" instead of a drip-edge on the back side of the (mostly) earth-finished half of the wall. The staining is from mud being carried down with the water along the face of the wall. How much of this water went behind the lime plaster into the substrate and bales? |
