Note to an experienced master:
In obsolete buildings with wood and use, thin web may also be missing. In these cases, they advise complete gluttoning the ceiling surface with a plastering fiberglass with a cell of 2 x 2 millimeters. The net is putty, polished, primed with diluted adhesive composition for wallpaper and, accordingly, is glued with a thin spider. This «layer pie» will guarantee the permissible maximum degree of protection against the exit of the elevation to the ceiling surface.