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The cracks in the walls they are not decorative at all unless it is a weird graffiti that wants to give an air of neglect in a trendy vintage place. Cracks, when they appear on the walls of the house, as well as on the floor or ceiling, are a clear sign of a construction stability problem. Let's not shrug, let's not cover them with a piece of furniture but let's try to investigate what it is. Why they were formed and how to remedy but not before understanding their origin.
Among other things, there are various types of cracks in the walls which from time to time are specifically linked to one or more problems. There are more or less deep cracks, long or short, and they can appear on load-bearing walls or not, inside, in rooms, but also on the facade of a house.
Cracks in the walls: causes
Before intervening to fix the cracks in the wall or even in the plaster, it is essential to contact an expert to understand what their origin is. The first intervention, therefore, concerns theidentification of the causes that caused the problem. If you intervene blindly, only worry about covering the sign from an aesthetic point of view, not only do you spend for nothing, because the crack often reforms, but you also compromise the evidence, the clues that could help us understand why. are ticked cracks in the walls.
Let's see together why cracks form. There are times when it is a typically structural problem, if, for example, there was an error or an oversight in the design. In some cases, however, the project is correct and themistake was made during the construction phase. If the design and execution are flawless, the cracks on the walls may instead have been caused by natural phenomena or poor maintenance of the property.
Cracks in the walls: natural causes
We have mentioned natural causes, let's see better with some examples that unfortunately remind us of disastrous events that have also affected our peninsula recently. Among the natural causes that can lead to the creation of cracks in the first row are undoubtedly seismic events which undermine the stability of buildings, if all goes well, if they don't destroy them completely.
Other natural causes can be the Drought and, below, the various climate changes which can disturb the balance between the foundation and the ground that supports it. It does not appear, but even these last phenomena mentioned can be destructive and are capable, in the long run, of compromising the safety of the building.
Not only i fast and destructive movements seismic events are dangerous. What we have said is true for both the internal and external walls of a building. A natural cause typically from an external wall is instead linked to presence of trees with large and robust roots. When they grow too close and too close they can lead to cracks in the walls. Spills of waste water, excavations close to foundations and very close vehicular traffic may be “natural” causes to be taken into consideration.
Cracks in the walls and humidity
Let's go and see better when with the cracks in the walls water is also central, or rather, humidity. This is the case of sewage infiltration into the ground, for example. This phenomenon, over time, changes the composition of the soil itself, making it more friable and less reliable.
However, when the weather is too humid and the wall is not well protected, they can appear damp spots on the walls, efflorescence, mold, typically, but nothing prevents cracks on the walls from forming in the long run.
Cracks in the walls: how to intervene on the ground
Before going to cover the symptom, the "disease" must be treated. In this case, before moving to "erase" the crack from our walls it is good to understand why it appeared and proceed with the soil consolidation of foundation, or, alternatively, of the foundations.
When you want to intervene by reinforcing the ground that supports the building, works are carried out aimed at reinforcing the ground to improve its bearing capacity. Only in this way can the necessary stability and safety conditions be restored. In practice, how do you proceed? In most cases with injections of expanding resins which constitute one of the fastest, most effective and decisive solutions to date. Besides, it is one minimally invasive activity, does not require excavation, drilling, demolition, heavy and long construction sites. Always with expanding resins, quick interventions can be made in confined spaces, this material is often perfectly compatible with the ground and the environment and guarantees a precise and effective result over time.
Cracks in the walls: how to intervene on the foundations
When you go to consolidate the foundations, you intervene on the structures and you have to choose between different technological approaches including piling works, micropiles and the enlargement of the foundation footprint. The solution less invasive and faster it is made up of micropiles to be placed near the windows but the others are not to be discarded a priori. It is an evaluation that must be done by an expert. If you want to know more, I refer you to the article we dedicated to the topic.
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