Typical signs
- Overflow, dripping joints, reverse slope, loose hangers or runoff streaks.
Where it is often found
- Eaves, valleys, downspouts and areas below large trees.
What it can mean
- Debris, insufficient slope, widely spaced hangers, ice or blocked downspout.
What to check next
- Observe during controlled rain from the ground.
- Check downspout discharge and fascia condition.
Reasonable immediate actions
- Clear accessible outlets without climbing onto a slippery roof.
When to stop and call a professional
- Work at height, rotten fascia, heavy ice or blocked buried drainage.
Prevention
- Seasonal cleaning, proper slope, secure hangers and extended downspouts.