Diagnosing a Leaning Fence on a Slope: Drainage vs. Installation Issues

Wood fence (2 yr) on slope leans after snowmelt. Homeowner added soil for flower bed. Fence pro added concrete, recommends French drain.

Diagnose First

Fence in a "valley" (low point): Water traps → soil softens → posts lean. French drain may help.
Fence on slope with continued fall: Water runs off. Lean = poor installation (shallow posts, no concrete).

Regrade bed so water flows around it, not into it. French drain unnecessary.

Bridge piers stand in water. Fence posts should withstand wet soil if set deep in concrete.

Landscaping and Design: French Drain for Downspouts on Flat Ground: Solutions; Draining a Wet Backyard Spot: Simple Methods First; Landscaping Drainage Trenches: French Drain with Gravel vs. Open Swale with Shrubs; Neighbor's Runoff: Stop Water at the Fence Without Causing Problems; French Drain Design Review: Pipe, Fabric, and Grading Details; Winter Drainage in New Brunswick: Swales Beat French Drains; Landscaping a Wet Backyard Trench: Drain, Don't Pond; Choosing Shade Trees Near a French Drain Without Root Damage; Fixing a Low, Flood-Prone Backyard with a Dry Sump; Fixing a Reverse French Drain Near a Slab Foundation

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