For a building's drainage, what is considered a positive slope away from a foundation?

A slope of 5% is considered a positive slope away from a foundation because it effectively directs water away from the structure, helping to prevent water accumulation that can lead to foundation damage over time.

In drainage systems, a slope is typically measured in percentages, with a higher percentage indicating a steeper incline. A 5% slope will move water away from the foundation more effectively than lower percentages, such as 2%, 3%, or 4%. This ensures that rainwater, snowmelt, and other forms of moisture do not pool around the foundation, which is critical for the longevity and stability of the building.

Proper drainage planning is essential in construction, and a 5% slope is often recommended or required in many building codes to provide optimal drainage performance. This slope helps maintain the structural integrity of the foundation and protect against potential water intrusion problems.