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Negative-grade check at downspout discharge — Roseville MN walkout home

Defect Library · Roseville, MNNegative Grading at Roseville Walkout Basements

Negative grading is soil that slopes TOWARD the foundation instead of away from it. Code requires 6 inches of fall in the first 10 feet from the wall.

Era
Any walkout-basement home; common on Owasso Hills
Key Threshold
6 inches of fall in 10 feet (per IRC)
Last Reviewed
May 2026

What is Negative Grading at Walkout Basements?

Negative grading is soil that slopes TOWARD the foundation instead of away from it. Code requires 6 inches of fall in the first 10 feet from the wall.

What do we find on Roseville inspections?

Owasso Hills and North Oaks walkouts on natural slope toward the lake are repeat offenders. Decades of mulch top-offs and settled soil at downspouts create reverse grading.

What should you do about it?

Re-grade with 6:10 fall. Extend downspouts ≥ 6 ft from the foundation. Drain-tile retrofit if persistent.

How this connects to other Roseville defects

Era-defects rarely show up in isolation. A 1965 Roseville rambler that has one of these almost always has two or three more from the same construction window. Our defect library documents the full set we look for, and the inspection report cross-references findings so you can see the pattern.

Related defects in the same era window

Get this checked on your Roseville inspection

Call (651) 666-5602 or request an inspection quote. Negative Grading at Walkout Basements is included in every standard home inspection we perform. Same-week digital report with photos and prioritized repair recommendations.

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Same-week reports. Thermal imaging included. Era-specific findings for 1955–1975 ramblers, lakefront walkouts, and new-construction townhomes.

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