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
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.