Wall moistening:
Wall moistening
  Fundamental problem

A frequently returning problem of old buildings is the long-lasting restoration of walls being without or with damaged insulation.

This is the more so important because the wall that has become moisty could be the cause of further damages:
• The moist and humid air generated by the wet wall may be harmful to the health resulting in asthmatic and rheumatic diseases.
• The heat insulation of wet walls is poor and if the wet areas are extending it becomes even worse. Consequently, the appropriate heating requires surplus expenses.
• Accumulated moisture in the walls may result in freezing off.
• Enrichment of salts close to the surface area may cause further damages to the plaster and even the structural material of the wall.
• The spectacle of wet walls with crumbling plaster is very unpleasing from aesthetic point of view. This may have an affect on the tourism attractiveness of the place, too.

Above problems are jointly caused by the salts flowing together with the capillary water that is moving upwards from the ground. Based upon the results of laboratory examinations till now, it can be declared that significant majority of visible crumbling damages and wet spots on the upper evaporation zone of the wall surface, i.e. in the reeking area, are generated by salts. The main reason of damages is the increase in volume caused by the phase transformation when the hygroscopic salts that have been enriched in this area transform from dissolved form into crystallized one. These processes can be explored and demonstrated only through special insulation expertise based on wall diagnostic examinations. Effective wall drying and desalinization solutions can be defined only upon wide-ranging knowledge. Consequently, there are complex protection principles to be applied for the selection of accomplishment system for restoration of damages both for subsequent wall insulation that is preventing upward movement of moisture and decreasing enrichment of salts in the surface plain of the wall.

This is the reason why we recommend to have accomplished the detailed examination of the walls of the building prior to the start-up of restoration works.