After plastering work was carried out in the room, it must be sustained. It all depends on what kind of plaster mix you have chosen. In the event that it is a lime-hgyl mixture, it is dried no less than fifteen days, but for a cement there will be enough and seven days. However, it is worth considering that when using the latter it is impossible to ventilate the room, since in the process of hardening the cement is very necessary for wet air.