it is called dry wall because it is installed while already dry. Unlike the old technique of lath and plaster where you build up the wall with multiple layers o

it is called dry wall because it is installed while already dry. Unlike the old technique of lath and plaster where you build up the wall with multiple layers of wet plaster https://en.wikipedia.org/wiki/Lath_and_plaster https://en.wikipedia.org/wiki/Lath_and_plaster