Soil permeability refers to the soil’s ability to move air or water through. When discussing permeability of soil, it is common to be primarily referring to the top five feet of soil in any given space. There are many things that can determine the soil permeability including the size of the pieces of soil. Additionally, the soil pores and how they are connected have a great deal to do with the permeability of the soil. The permeability of the soil can also be altered based on how compact the soil might be. Also, soil permeability can be changed if there are a large number of rocks within the soil as this could make it harder for the soil to move freely in the area.
Soil permeability can be vital when working on a new excavating project. Whether a structure such as a house or office building is being built or a new driveway is being created, the permeability of the soil can change how the project is taken on. A professional contractor will want to be sure that the soil is permeable enough to take on and absorb rain water while still providing the stability necessary to set the new pavement or the foundation of a building. You want to be sure that the soil below the structure is not going to give way and shift when it is faced with a great deal of water pressure from rainwater.