* Try to stick a push-pin or ice pick into it. Sheetrock/drywall is soft and the point should go in easily. Plaster is hard -- it will be hard to push the point in and the plaster will tend to crumble.
* Go into the attic and look under the insulation. Drywall is smooth. Lath is very rough. It's applied to strips of wood with gaps between. The plaster is squished between the strips to form "keys" that hold the plaster to the wall. See links. * Remove an electrical outlet cover and look at the edges of the exposed wall. You may be able to see the ends of the lath strips.
Remove a switch or outlet cover and you will see what it is.
The japanese put white plaster on the walls because it is fireproof
You drain the water then plaster the walls from inside
does it cover repairing plaster walls and repainting and fixng plumbing
Stucco
They really shouldn't, it is toxic.
Just paint it white!!
stucco
Frescos are painted directly onto damp plaster on walls.
There are a couple types of plaster that can be used for interior walls. One form of plaster is lime plaster; it is made up of calcium hydroxide and sand. Cement plastic is a mixture of sand, water, portland cement, and suitable plaster.
Aggressive water chemistry and age.
A fresco is created by painting colored pigments (oil, traditionally) into wet plaster.
You can use a heavy paint or plaster to get a sort of wavy effect.