How do inspectors evaluate the grading and lot drainage of a property?
Quick answer: Inspectors assess whether the ground slopes away from the foundation on all sides, where downspouts discharge, the condition of any window wells, and how surface water moves across the lot. In Bloomington, with clay soils and heavy snowmelt, proper grading is essential to keep water away from the basement. The inspector looks for low spots, settled soil against the foundation, and drainage that directs water toward rather than away from the home, since these are leading causes of wet basements.
The fundamental rule is positive slope away from the house. Inspectors check that soil falls away from the foundation on every side so rain and snowmelt drain off rather than pooling against the walls and seeping into the basement.
Downspouts and window wells get attention. Downspouts should carry roof water several feet from the foundation, and window wells should drain and stay clear. Discharge dumped at the base of the wall concentrates water exactly where it causes problems.
Our soils raise the stakes. Bloomington's clay holds water and heaves with frost, so poor grading translates directly into basement moisture. Because regrading and extending downspouts are usually inexpensive, these drainage findings are high-value, easy fixes.
