Leaves in Roof Valleys: Why They Matter for Gutters
Updated
Short answer
A valley collects water and leaves from two roof planes. Debris piled there holds moisture against the shingles and slides into the gutter at the next storm, right where gutters clog. Clearing it adds about $75 to $200 to a cleaning (Housecall Pro, 2026).
Where debris collects on a roof
- Valleys, where two roof planes meet.
- Behind chimneys and skylights.
- Where a dormer or addition meets the main roof.
- On low-slope porch and garage roofs.
How it is removed safely
With a blower or soft broom on dry, walkable pitches, working downhill with the shingle laps, or with a pole from the ladder on steep roofs. Never a pressure washer, which lifts shingle edges. In winter, the University of Minnesota Extension warns that anyone on a winter roof risks injury and may damage the roof.
Quick answers
Should roof valleys be cleaned?
Yes, when leaves pile up in them. Clearing valleys before cleaning the gutters keeps the gutters clear longer.
Rather have someone else do it?
Tell us the address, how tall the house is and what you need. A local crew calls back with a price before anything is booked.