When building a home or other structure, drainage is crucial for preventing damage and ensuring long-term stability. There are two types of drainage, positive and negative, both of which are largely determined by the slope and grading of the land. Here's what you should know about these kinds of drainage and how to avoid possible problems.

Positive

Positive drainage occurs when water flows away from a structure toward lower elevations. This may be a byproduct of the natural slope of the land or is the result of efficient grading, which creates a downward angle upon which water flows to a lower location.

With positive drainage, there is a much lower risk of foundation damage and flooded basements, as these components stay drier. This is crucial for preventing musty odors, mold growth, and pest infestations, as well as keeping the structure from settling in potentially hazardous ways.

One possible issue with positive drainage is erosion at the lower elevation to which the water flows. It's important to have your excavation contractor grade the land in such a way that water doesn't collect at this point and cause the soil to deteriorate.

Negative

Negative drainage is the opposite of positive, wherein water flows toward a structure. This is problematic because it greatly increases the chance of foundation damage and damp basements—and the many issues associated with them.

However, there are ways to avoid negative drainage. Your excavating contractor might suggest raising the slab of the structure during construction or installing a subsurface drainage system, either of which can help turn negative drainage into positive.

Drainage should be a main priority when planning a new construction project. Gross Construction is here to help at every step of the process. They have more than four decades of experience and serve property owners throughout the Hot Springs Village, AR, area. They provide comprehensive grading, excavation, and land clearing services. Their licensed and insured contractors will make sure your land is prepared for your building needs and goals. Call (501) 226-8764 to schedule a free, in-person estimate or visit them online to browse their services.