Debris and Drainage Conditions That Affect Runoff
Blockages generally happen when leaves, twigs, pine needles, or airborne silt settle along the gutter channel. When debris collects at the drop outlet where the gutter meets the downspout, rainwater backs up and spills over the edge during storms.
- Organic matter accumulating in horizontal gutter troughs
- Compacted debris jamming the upper opening of the downspout
- Silt and grit washed down from the roof surface
- Visible obstructions near the ground-level downspout elbow