Mineral surfaces, plasters or finishing, can be powdering and in some cases poor in binder and, therefore, with insufficient mechanical resistance.
These conditions do not allow the subsequent finishing operations to be carried out in a suitable manner as the latter may find a defective adhesion to the underlying support.
The realization of finishes above unsuitable surfaces can lead over time, due to the tensions that are formed between the various layers, to micro-cracks from which the water will trigger its degrading action.
The problem described above also occurs on old paint, aesthetically degraded but still load-bearing, for which it is
intended to perform an overlying finishing intervention.