The second method using moisture -resistant drywall or plywood screens. First, a frame of metal guides used to install drywall is made, can be made of wooden bars, while you need to soak them with a means of decay. The frame is attached to the wall vertically, self -tapping screws. Then the screen itself is installed. For ventilation, so that there is no accumulation of moisture inside the box, you should make holes below and at the top.
