Debris and Drainage Conditions
Different surroundings create varied demands on a drainage system. Overhead branches, windblown seeds, and accumulating roof grit can restrict water passage through channels and outlets.
- Deciduous leaves and evergreen needles settling inside the channels
- Granules washing down from older shingles
- Bird nests, twigs, and small pests obstructing vertical outlets
- Standing water caused by silt accumulation in low-pitch sections