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The purchase of land to build is not random. There are a number of criteria that need to be carefully considered to make sure you make the right choice. In particular, it is essential to analyze the nature of the soil before building a house in good conditions and with the right methods and techniques.

Determine the nature of the soil: an important step before buying a land

Determine the nature of the soil: an important step before buying a land

Why define the nature of a soil before a construction?

Determine the nature of the soil is an important step before buying a land. Moreover, builders often require soil expertise and a specific document before starting work. Banks and insurance organizations also request a soil analysis document in areas associated with risks, as part of the Risk Prevention Plan (PPR) which controls the rights to build in sensitive areas (landslide)., Flood zone… ).

The study of the soil constitutes, indeed, a real security pledge for the different operations that the manufacturer will undertake. This expertise is also a guarantee of sustainability of the home (ten-year guarantee, security, insurance...). Thanks to the results obtained, building professionals know what to expect and can thus opt for adapted methods concerning earthworks, foundations or even masonry. In this context, these experts in works have a complete report including geotechnical maps and recommendations for a safe construction.

Soil study: entrusting the task to a specialist

Determining the nature of a soil can not be done at a glance. Certainly, there are certain elements that already make it possible to have a small idea of ​​the characteristics of a ground like a loose or muddy ground, but there are many other types of soils that only an in-depth analysis of the earth can highlight:

  • clay,
  • loamy
  • humus,
  • siliceous,
  • limestone,
  • sandy.

Depending on the specificities of the soil, a geological sample may be sampled by coring (using special sounding equipment) before to be analyzed in the laboratory.

In any case, it is strongly recommended to entrust this task to a specialist, especially to a geotechnical design office who will use the personnel and equipment needed to study the soil. A specialist will first look at the geology of the area while studying plans for future construction.

The price of a soil study depends on the surface and its accessibility. The price starts around 1,000 euros and this price can very quickly double if the ground is sloping or if the construction of a swimming pool is envisaged. But this investment is necessary, because if the foundations of a house do not match the specificity of the land, the cost of repairs can be (very) expensive, or the whole house will be rebuilt.

The purpose of a soil study

The intervention of a specialist makes it possible to know the nature of the geological substratum over which construction will be built. By knowing this specificity, the builder will know precisely what types of work to undertake. Different solutions can be adopted in case of complexity (clay soil, underground cavity, water table...).

Determine the nature of the soil before buying a land and before the construction of a home is a must step, especially to choose the type of foundation to set up.

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