Is a 2% slope commonly required for sheet flow drainage around houses?

A 2% slope is commonly required for sheet flow drainage around houses to ensure effective water drainage away from the foundation. This gentle slope allows rainwater to flow efficiently, preventing pooling that can lead to potential water damage or foundation issues. A slope of 2% translates to a rise of 2 feet for every 100 feet of horizontal distance, which is generally adequate to facilitate proper drainage without causing erosion or other adverse effects.

In residential construction, appropriate grading is crucial for managing surface water runoff. Many building regulations and best practices emphasize maintaining this slope to protect the structure and enhance landscape sustainability. While the specific requirements for drainage can sometimes vary based on local building codes or the particular characteristics of a site, the 2% slope is a widely accepted standard that helps ensure homes are adequately protected from water-related issues.