Defect · Exterior
Negative Grading
Negative Grading is a exterior defect common in Southeastern Minnesota homes. The single most common root cause of wet basements in the region.
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Negative Grading is a exterior defect common in Southeastern Minnesota homes. The single most common root cause of wet basements in the region.
Field Evidence
What we find.
Negative Grading as found on a Southeastern Minnesota inspection
As foundDocumented◂▸What causes negative grading?
Soil slopes toward the foundation, routing surface water against the wall instead of away.
What we check
Slope within 10 ft of the foundation, downspout extensions, window-well drainage, efflorescence inside.
Why it matters
The single most common root cause of wet basements in the region.
Related: Exterior Inspection · All defects · Inspection guides
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