How to effectively remove saltpeter and moisture?

Damp walls and dirt, what to do?


The salpetre on walls is this type of capillary humidity that appears as whitish stains, resulting from deposits of crystallized salts rising to the surface.

If it usually appears on facades and walls, it is because a building has moisture problems coming from the basement. And this moisture carries with it salts and other substances from the soil and walls that eventually crystallize and settle on the surface of our facades and walls.

Therefore, the appearance of saltpetre and moisture on a wall is not only an aesthetic problem, but it can also cause more serious problems, since it is able to lift the coating and leave a wall completely unprotected against rain, sun, ... thus facilitating the appearance of cracks and leaks.

However, rising damp often spreads easily. Therefore, if a wall has saltpetre stains, it is very likely that in a short period of time the moisture will rise through the surface and may cause damage to the facilities it houses, such as deterioration of pipes or electrical damage.

The fact that a façade or a wall has saltpetre stains is directly related to the type and quality of the ground on which the structure is built. It also has a lot to do with the composition and materials used in the construction of the foundations and their capacity for resistance and insulation.

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Considering all the problems that can be the cause of the appearance of saltpetre and soil moisture, the first step in the treatment of walls is to make a diagnosis that tells us:

o The characteristics of the saltpetre surface to be treated.

o The type of humidity and its origin, in order to eliminate not only the superficial problem, but also to take the necessary measures to attack the root of the problem.

After this initial analysis, the choice of products for removing saltpetre from walls will not only be simpler, but also much more effective.

As we have mentioned on other occasions, diagnosing the origin of the humidity is the key to avoid the deterioration of a house and guarantee the application of the most suitable treatment to improve the aesthetics, but also the insulation and sanitation.

Products for the treatment of dirt on walls


Once we know the composition of the structure to be treated and its condition, it is time to choose the products that will allow us to effectively remove the saltpeter from the walls.

Several products are recommended: 

Tixoway Antihumidity Acqua : 


It is a very effective paint to be applied on interior walls with rising humidity that require periodic treatment.

It is a high adhesion, high breathability paint. This means that it allows water from wet areas to evaporate easily, without flaking or lifting primer coats.

It is the most recommended type of paint for treating walls on first floors, basements or cellars, where condensation and lack of ventilation often exacerbate basement moisture problems.

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Plasmont Antihumidity :


It is the star product for the protection and insulation of walls of various compositions, which often suffer from rising dampness from the ground and foundations.

It is very effective on brick, stone, concrete and other materials. concrete or mortar, whether interior or exterior.

Plasmont Antihumodite is also perfect for restoration work on walls damaged by soluble salts or efflorescence.

Another point in favor of this type of mortar is that it is effective as a coating. This means that it is also suitable as an exterior or interior coating, it also provides a continuous and uniform finish.

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