There are different types of humidity , each of which generates the formation of mold on the walls in a different way; for this reason it is necessary to identify the type and consequently the most appropriate remedies so that the intervention can have a positive outcome.
There are three types of known humidity: rising damp , infiltrating humidity and condensing humidity .
Rising humidity exploits the porous nature of common building materials to rise from the ground, transporting the salts and depositing them on the walls of the house. The causes of this phenomenon are to be found in the construction methods of the building which is often left in direct contact with the ground, without the laying of an adequate waterproofing layer in the attic against the ground.
There are, then, cases of unventilated houses on the ground floor or located in basements without ditches.
Rising humidity manifests itself through the formation of mold on the plaster and its detachment, threatening the stability of the building and generating health problems and economic damage due to heat dispersion.
Moisture from infiltration
The infiltration humidity can be of different types and, although it can be caused by the presence of water in the ground in contact with the external walls, it is good to be careful not to confuse it with rising damp .
As already mentioned, one of the causes concerns the direct contact of the basement floors, not adequately waterproofed, with soil containing water; there are, then, other triggering factors, such as the exposure to rain of the buildings on the ground floor or any breakages or leaks of hydraulic pipes that negatively affect the walls due to the resulting humidity phenomena. In summary, the triggering factor is due to the penetration of water into the walls or floor .
Even in the case of infiltrating humidity, it will be possible to notice the onset of dark spots on the walls of the basement floors, with consequent formation of mold and evident damage to the walls, or lifting, oxidation and opaque areas on the flooring..
Moisture from condensation
L ‘ moisture from condensation derived from the condensation of water vapor due to either poor thermal insulation -o in the presence of thermal bridges and occurs in a seasonal manner, affecting above-ground walls and rooms in the winter months, in particular high or low corners and floors; while in the summer months it is possible to identify the effects of the phenomenon in the floors of the ground-based rooms without thermal insulation.
Mold on the walls: the consequences
The consequences due to the formation of mold in the home and its proliferation are many and more or less serious.
The presence of this phenomenon can degenerate into a deterioration of the finishes of the building, affecting plasters, furnishings and everything that is present inside the confined spaces, or seriously threaten the health of the tenants with the appearance of irritation to the eyes and to the skin, allergic diseases of the respiratory tract with consequent symptoms of asthma and chronic bronchitis, or worsening of the state of health of people already suffering from certain specific diseases. Of course, the presence of mold in the house affects the value of the house.
It is therefore important to recognize that mold is toxic and to act effectively to stem its formation or intervene to eliminate the manifestations in progress.