Dehumidifying plaster for walls: the instructions for a correct implementation. When and how to perform the surgery and useful advice.
L'dehumidifying plaster for walls is it really effective in solving the problem of humidity on walls? Here is all the information you need to combat capillary rising damp and solve the problem of mold and damp walls.
L'plasterplays a key role insanitationbuilding. If you want to recover a wall devastated by rising damp, you can help yourself with adehumidifying plaster.
Among the enemiesnumber oneof buildings include the thermal bridges and the consequent humidity, in particular the capillary rising damp, that is, coming from inadequately insulated bases. To make the scenario worse is the presence of underlying water sources such as surface aquifers or small leaks in pipes and sewers: in these cases, the water tends to rise through the walls in the form of humidity. Water penetrates into the walls, especially if these are porous, that is made of materials such as tuff, bricks, sandstone ... The consequence of humidity in the walls ranges from simple mold to the most substantial structural damage that sees the pulverization of the mortar joints, the disintegration of the stone and even the flaking of the masonry.
In the event of damage to the walls due to humidity, it will be necessary to identify the cause and carry out an appropriate waterproofing intervention. On the other hand, the wall must also be protected in an appropriate manner and in this case, thedehumidifying plaster.
A gooddehumidifying plasterit is given by materialmacroporouswhich acts like a sponge thus protecting the wall from moisture. The particles that make up thedehumidifying plasterthey are characterized by a particularly porous particle size which, in the event that the necessary waterproofing interventions are not carried out, must be periodically replaced. This means that the user will have to plaster several times after a period of time inversely proportional to the intensity of the damage.
How to put a dehumidifying plaster for walls
Put adehumidifying plasteris simple! L'dehumidifying plasterthat we find on the market is given by a mixture of prefabricated materials to which only water will need to be added.
The first precaution to follow concerns the quantity of water to be added to theplaster. For this step we refer you to the instructions on the label: it is the manufacturer who specifies the dilution and the amount of water to add. Remember that too much water would weaken the plaster and could worsen the condition of the wall because it could be absorbed by the wall just like moisture. A little water, on the other hand, would not mix the ingredients of the mixture well.
Council No. 1
How much water to add? Add the water gradually, a little at a time, until the mixture is homogeneous, soft and mellow. In the absence of a concrete mixer, mix for a long time manually.
Tip # 2
When to apply the plaster? The best time to plaster a damp wall is from March to October trying to avoid the hottest months of the year, when temperatures exceed 30 ° C. Winter is also not recommended, especially with temperatures below 7 ° C.
How to apply the plaster? Choose a dehumidifying spray plaster to make the work of laying easier. In the absence of a spray plastering machine, you will have to equip yourself with "witnesses" called staggi, these are wooden or metal rulers that have a predefined section. The witnesses must be applied to the end of the wall to be plastered and used as guides for the sliding of a second strip, it will be this last strip to remove the excess plaster.
The plaster spray gun is very simple to use and also accessible. On Amazon, a well-made plastering gun can be bought for around 50 euros with free shipping. For all information, please refer to the official product page: Prodif plastering gun
How double should the plaster layer be? The thickness of thedehumidifying plasterit must be higher than that of a classic plaster. Macroporous plasters must be applied with thicknesses up to 4-5 cm. Also in this case we advise you to read the instructions on the label: the thickness of the plaster may vary depending on the material used.
If your problem is rising damp, beforeapplication of the dehumidifying plaster, remember to heal the wall using the so-called "chemical barrier". For more information, please refer to the article "chemical barrier against rising damp ".