Why do you need to plaster the walls before finishing

Do I need to plaster the walls before gluing or painting

What could be more pleasant than a qualitatively plastered surface and finishing work providing the coziness of the rooms.

It is necessary to use these construction and repair works and the final design of wall covering do not always want to think about the applied technology for their decoration. In the case of errors and negative consequences, people begin to ask the question “why this is how it happened” so that there are no difficulties after the survey of the object must at least have general ideas about the technology used in the installation of finishing surfaces, if you need to do it yourself.