Mineral surfaces, plasters or finishing, can be crumbling and in some cases poor in binder and, therefore, with insufficient mechanical resistance. 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 paintings, already aesthetically degraded but still bearing, for which it is intended to perform a finishing intervention above.