How Your Yard's Grading Might Be Causing Your Basement Problems
Your basement is wet. The first thing to check isn't the foundation — it's the yard.
The 6-in-10 rule
The IRC recommends 6 inches of fall in the first 10 feet from the foundation. That's positive slope away from the house — water rolling away, not toward.
How to check yours: Stand at the foundation. Look at the soil grade. If the ground is higher 5 feet out than at the foundation, you've got negative slope. If you see water pooling near the foundation after a rain, the slope is failing.
What goes wrong with grading over time
• Settling soil near the foundation (especially in the first 2-3 years after construction)
• Mulch piled up against siding, raising the ground level near the house
• Plantings that hold moisture and raise the soil level
• Driveways, walks, or patios installed at or near the foundation level, blocking drainage paths
• Downspouts discharging into low spots that drain toward the house
How to fix it
The fix is usually less dramatic than people fear:
• Re-grade with fresh fill (topsoil or fill dirt) to establish positive slope
• Remove mulch and plantings within 18 inches of the foundation
• Extend downspouts to discharge at least 5 feet from the house, onto a graded surface
• For tough sites, install a French drain or swale to carry water around the house
When the yard isn't the cause
If your grade is correct, gutters are working, downspouts discharge properly — and you still have a wet basement — then it's time to look at the foundation drain and the waterproofing. But work outward from the cheap fixes first.
What this means for you
Walk the perimeter of your house in a rain. Where the water goes is the diagnosis. Most basement issues are solved with $500 of grading and downspout work, not $20,000 of waterproofing.
What contractors should know
The grading-first conversation builds long-term trust. Customers who fix the cheap problem and see it work refer you for everything else.
If something looks off
If you're not sure whether the work was done right, start with a calm conversation with your contractor. Dated photos of each stage make that conversation simple for both of you.
Supervisr's Landscaping QA model follows industry standards and guidelines set forth by ANSI (A300 tree care), ISA (arborist best management practices), ICPI / CMHA (paving Tech Specs), and the major segmental retaining wall manufacturers. It can evaluate landscaping photos for grading and drainage away from foundations, retaining wall base and geogrid placement, pruning cut quality, and permeable pavement base prep. Upload photos of yard slope (6-in-10 rule), retaining wall base depth and geogrid, pruning cuts at branch collar, pavement base depth and edge restraint, and you'll get a documented evaluation back in minutes with citations to the specific standards involved. It's the same checklist a careful inspector uses — applied to your photos, on your timeline.
If your contractor uses Supervisr, they may share a report on your job with you: the photos and a plain-language note on each stage. For contractors, that same record is what keeps a warranty conversation short.
About Supervisr
Supervisr is an AI quality-assurance platform for residential landscaping. It follows industry standards and guidelines set forth by ANSI, ISA, ICPI / CMHA, and the major segmental retaining wall manufacturers, and evaluates landscaping photos for drainage, retaining wall quality, and tree care.
Contractors use Supervisr to document quality at each milestone — protecting against warranty disputes and building a track record of verified work. For more on how Supervisr's QA model follows the published references for Landscaping installations, visit supervisrapp.com.