Nothing has been done on the house lately because I just spent three days doing something much cooler. The pictures are from a 3 day class called Natural Finishes. The class went over interior and exterior building finishes. Day one (and picture 1) earthen finishes. Earthen finishes are basically clay, sand and water. Straw, animal hair, cotton tails, etc. can be added as filler and to improve the structural qualities. My yard is mostly clay so I'm looking forward to making a greenhouse or cold frames covered in this. Day two (and picture 2) covered lime plasters. Lime plasters are similar to what you can find in most houses for drywall but have some additional qualities and some drawbacks. The biggest drawback in my mind is the cure time which can be several months for a thick coat, only a few days though to get painted or plastered over. An earthen finish coat covered in a thin lime plaster makes a durable exterior finish. Day three (and picture 3) covered paint like finishes. From milk based casein paint and clay based coatings that can be made at home to commercial products that can be ordered.
On the left the underlying earth coat can be seen and on the right is a topping earth coat with some iron oxide for color. The middle is a lime wash, also known as a white wash.
This is a lime plaster with a thin coat of pigmented water added before the outside of the lime cures. That is how frescoes are made.
This is a small square of sheet rock with a clay based paint.
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