Fixing Basement Water Intrusion: French Drain vs. Wall Repair

A homeowner has holes in a concrete sidewalk/wall allowing water into a basement apartment. They propose installing PVC pipe to divert water to the sidewalk.

Diagnose First: Wall vs. Walkway

Is the concrete a vertical basement wall or a horizontal walkway? The solution differs significantly.

French Drain Basics

A French drain (perforated pipe in gravel trench) effectively redirects groundwater, but:

• If the vertical wall is leaking, exterior waterproofing and drainage at the footing is needed
• If a walkway slopes toward the house, regrade or install a trench drain at the door
• Simply piping water away doesn't fix the source

Recommended Action

1. Identify exact water entry points
2. Consult a general contractor or waterproofing specialist
3. Exterior excavation and waterproofing may be required for wall leaks
4. Interior drainage systems are a last resort

Address the structural issue first; drainage is a complement, not a substitute for waterproofing.