In today’s article on the Sun Reforms Blog we want to talk to you about damp spots, which can cause mold to form, which in turn can be detrimental to our health. Of course, not all mold spores are harmful to people, but they are almost all feature powerful allergens.

Additionally, moisture and seepage can cause yellowish halos to appear on walls, crumble plaster, and even cause structural damage. Common sense urges us to try to solve the problem permanently and, if possible, quickly.

To effectively remove moisture stains from walls, you need to understand where it comes from. In this article we will talk about how to remove moisture stains from walls, identifying their origin and applying the most appropriate intervention.

Humedades en paredes

Causes of the appearance of dampness on the wall

The reasons why humidity makes an appearance in some part of our house may be due to different causes that we will now list.

Rising humidity

As its name suggests, the wall absorbs moisture from the ground or floor and is transported upward. It can cause stains as well as outcrops of salts in the lower part of the walls of the room.


The thermal difference that exists between the air present in the room and the interior walls causes drops of humidity to form in the upper parts of the wall, and therefore colder. This can lead to mold stains in the corners of the rooms and also around the windows.

Humidity in the building

Another fairly common cause of the appearance of dampness at home can be caused by the humidity of the building in question. Currently, many walls of newly created homes are usually quite thick, which can facilitate the formation of condensation.

Filtraciones de humedades

Possible leaks

Both the roof of the house and the terraces  are areas that, if they are not well insulated, it is easy for rainwater to enter, for example. This will cause isolated spots or leaks to appear at the water entry points.

Moisture on the embankment

Another aspect to highlight is that the humidity always comes from the soil through underground aquifers or wastewater. This can lead to salt outcrops on the ground or on the underside of walls. Easy for the appearance of spots caused by floods or river overflows.


Moisture stains on the wall: how much does it cost to remove them?

When you have problems with mold and moisture stains in your home, first what you do is eliminate them to avoid the risk of damaging your health and that the damage spreads to the rest of the rooms in your home.

There are 3 different ways to say goodbye to these humidities and they are the following:

  • application of an anti-mold cycle: disinfect the wall by removing mold and algae and killing the fungal strain inside the wall. An anti-mold treatment costs between 4 and 7 euros / m2, plus the costs of painting.
  • Creation of an anti-mold plasterboard liner: creates a waterproof layer that insulates the room from the wet wall, removing oxygen from the mold. The costs go from 30 euros / m² onwards.
  • installation of a dehumidifying plaster, based on lime and natural pozzolan, with an average cost of around 15 euros / m² (only the renovation layer, not the entire body of the plaster).

Prices vary greatly depending on the products used and labor costs, which vary depending on the location, although at Reformas del Sol de Málaga we always offer you the best quotes for this.

Remove moisture stains from walls and save money

If you have a very big problem of infiltration or humidity, the cost of cleaning the walls may not be very cheap. To find out if the prices they offer you are fair, the easiest way is to compare two or three estimates in different renovation companies in Malaga.

Comparing these different budgets will allow you to:

  • know what the average prices are for this type of moisture removal work.
  • find professionals who work at the same time for a company but who can carry out this reform.
  • request a free inspection to better assess the type of intervention to carry out.

Placas de yeso antimoho

Anti-mold gypsum board for damp spots on ceiling and edges

The anti-mold gypsum board is a type of board of this kind of material that repels water and is especially suitable for those humidities with condensation problems, with the characteristic damp spots on the ceiling and the upper part of the walls. Gypsum board is sold in pre-cut panels to be glued directly to the wall subject to moisture.

It allows to create an internal lining that has a temperature similar to that of the interior of the room and that, therefore, avoids the formation of condensation, in addition to improving the thermal insulation of the environment contributing to energy savings. On the other hand, you can create an anti-condensation layer of cork or use special thermal strips to prevent condensation from forming.

Special paint for humidity

To remove moisture stains from the wall caused either by flooding or infiltration, the causes of which have been eliminated, it is necessary to scrape off the damaged plaster and make the surface smooth and compact.

Subsequently, the stains must be covered with a renovating anti-humidity paint. Of course, it is possible to remove small moisture stains from the wall even by yourself, if the plaster is still intact and only after it has dried very well.

Simply use commercially available anti-mold detergents, which bleach stains and make them easy to cover even with water-based paints.


We hope that with these simple instructions you already know how to detect and eliminate moisture stains at home. If you have any problem of this type, get in touch with us as soon as possible and we will be happy to help you with everything you need.

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