Debris and Drainage Conditions That Affect Runoff
Accumulations inside gutters typically depend on the immediate surroundings rather than regional assumptions. Several conditions can restrict the flow of rainwater through the system:
- Fallen leaves, needles, twigs, and organic silt settling in the channels.
- Wind-blown organic matter collecting along roof valleys and low-slope edges.
- Nesting material or pest debris blocking downspout drop outlets.
- Standing water caused by weighted troughs sagging out of alignment.