Working with Earth Plaster
Friday, January 18th, 2008
Earth is easy to sculpt, and sculptures are not complicated to achieve. Mud makes it easy for anyone to make beautiful textures, patterns and lines. Just rounding a corner or bnuilding up edges at a door or around a window helps bring that area to life.

Just like people, mud varies. Still, a few basic principles and some practices can make you an expert artist of your own techniques. Experiment with designs and formats that you are interested in while the plaster is wet. Once you gain the skill apply the same technique all over the wall or in one single area. Colors can be mixed into the plaster itself or applied to the finished surface. Try colored earths if you have any around your area, they’re especially common in the Western states. Various shades of yellow, orange, red, brown and some blacks are all common to find.
An Easy Earth Plaster Recipe:
• One part “clayey” subsoil.
• Three to four parts sand.
• Just enough water (too much causes slumping and cracking)
• One half part fine fiber, quarter inch or less is best for detail work and thin plasters but anything works, from cow or horse manure to chopped grass or straw; to horse or human hair even.
Mix all of the above in a wheelbarrow, or a bucket. Use you hands or a shovel and add a little water at a time. It’s easier to add water than take the water away. The finer your materials the finer your plater will be too, so that is something to keep in mind as you mix. You can remove hard objects or coarse materials by sifting through a window screen.
Then smear the mud on by hand, with a masonry trowel or any other tool. Put the plaster on the wall about half and inch think or your will cause cracks and slumping of the plaster down the wall. You can even make shelves with the plaster b y using nails or existing shelves and covering them with layers of plaster. It is a good idea to let the plaster dry between multiple layers so that the addition has something to grab onto so it will stay on the wall better.
Use circular strokes to smooth the surface. Try different tools for different effects-from deep finger and hand prints, to subtly undulating strokes with your own palm. Wood gives a softer finish, metal a harder polish. A tool held perpendicular to the mud will make a ragged line, but at a low angle, it will make a clean line. Scratch or carve in a design using a fork, knife or even a spoon. Playing around with the plaster is the best part.
*Natural and Sustainable Living Tip: Choose reusable instead of disposable products such as diapers, razors, cups, pens, and even napkins.