Wall moistening:

REVERSION®zonal insulation method operating on electro-chemical ­ electro-physical principle:

One of the most effective systems among those of working on electro-chemical ­ electro-physical principle is the

REVERSION® with corrosion resistant anodes,

of domestic patent which is a desalinization and wall drying system that uses the polarity change:

Tower in Vaja Sándor Palace at Buda Castle Student’s Hostel in Sopron A wall located electrode and the earth Liszt Ferenc Square in Budapest
Roman Catholic church in Levelek Casemates in Szigetvár Nagy Sándor Street 6 in Budapest Chapel in Gyula Church in Máriabesnyő


The active protection against salts is considered to be a task of great importance. The hygroscopic salts have been concentrated in the plaster layer of the wall body are able for changing their physical condition because of the moisture taken from the environmental air and, consequently are damaging the wall surface – even in case of dry wall zone. The applied electro-kinetic wall drying systems that are advantageous in many cases are not able to reduce the moisture content until the salt content is high within the wall. In case, depending on the compound, the concentration of the salt solution is over 0,01 - 0,1mol/liter the electro-kinetic wall drying process will not start up. Moreover, it may happen that the system in its electrolysis phase, despite of our intentions, will cause damages within the plaster by the hygroscopic salts that are moving in the direction of the surface around the wall located electrode. It may also happen that the hygroscopic salt remaining even over a perfect insulation may cause further damages to the wall, which is not able to dry out. Thus, first the concentration of the capillary solution has to be reduced. For this purpose exclusively the systems working on the principle of electrolysis are suitable which are operated by a power unit fed by 220 mains voltage and producing 24 – 48 direct voltage for electrolysis.


Wall located electrode
REVERSION ring-mains
Salting on the ground

The system consists of a power unit, a corrosion resistant electrode and an insulated ring mains. According to its operation principle it separates the salt solution moving upwards in the capillary into ions by direct voltage and conducts the negative carriers to the provisional earth in the form of solution where they separate out. Opposite to other electrolytic systems this one does not dry out the wall before the salts are extracted. This system is suitable for reducing salt content even under different conditions. Through distribution of electrodes on both sides of the wall, in certain cases also in double rows, this can be a well applicable solution even in case of wall thickness of 100 cm when located in niches. The salt solution that has been concentrated in the upper zone of walls can be forced downwards with the help of a special net type electrode. It is an important condition that the salt that has been concentrated within the wall is able to move in capillaries only in the form of solution, i.e. in the presence of sufficient moisture. This is the reason why it is necessary to moisten the surfaces for the sake of efficient operation, or possibly cover the surface by plastic foil against drying out. Consequently, the period of desalinization can also be reduced.

Plaster covered provisional net type electrode
Foil cover

As soon as the salts get into the bottom zone the desalinization process can be continued if there has been installed a special line of corrosion resistant cast electrodes of the system. If the laboratory test confirms that the reduction of salt content of the entire wall body has reached the required level the wall drying system keeps on working in electro-kinetic mode of operation after having replaced the power unit.

In case of such demand it is also possible to accomplish desalinization only in the top zone of the wall. In this situation, after having reached the required degree of salt reduction, the net will be removed. In order to prevent moisture and salts from further penetration into the wall it is definitely necessary to install an active plain insulation into the wall after this process.

Advantages of the system :
  • less is the structural damage on the wall as compared to the other active insulations,
  • as compared to the plain insulations there will not be the danger of frost below the built-in line of electrodes; the wall will dry out more uniformly,
  • desalinization and drying of walls might as well be accomplished by one single technological process,
  • as the drying of the wall progresses the moisture content of the wall decreases along with the current consumption,
  • there is no need for maintenance; the electrodes withstand the corrosion affect of salts,
  • planar layout of electrodes makes realization of any formation possible.