Stopping Mud Washout onto a Paver Patio

Mud seeping through edgers onto a patio indicates two water problems: surface runoff overtopping the edge, and subsurface flow washing the base sand. The fix is intercepting water before it reaches the patio.

Solutions

1. Regrade upslope to direct water away from the patio edge.
2. Install a swale (shallow, wide, vegetated ditch) parallel to the patio to capture and redirect sheet flow.
3. Add a trench drain or catch basins at the low point of the swale, piped to a safe outlet.
4. Do not simply raise the edger or add material behind it—water will overtop again once debris accumulates.

Address the water source; there’s no magic product that stops mud if water keeps coming.