Debris and Drainage Conditions That Affect Runoff
Accumulated matter often interferes with roof drainage, creating blockages that stop water from moving away from the structure. Common conditions that affect flow include:
- Decaying leaves, twigs, and organic matter settling in trough corners
- Fine grit shedding from shingles and collecting along low-slope runs
- Bird nests, seed pods, or seasonal plant growth obstructing downspout entries
- Standing water caused by silt accumulation that slows natural drainage