Why Are My Gutters Clogged or Leaking?
Gutters exist to keep water away from your home's foundation and siding. When they fail, that water goes exactly where you don't want it. Most causes are simple and preventable with regular cleaning.
- DIY time
- 30 min–1.5 hrs
- Cost range
- $0–5,000
- Difficulty
- Moderate
- Risk
- High Risk
1
Before you start
Check for power lines, and set the ladder properly
Diagnose first, then act.
2
Decision matrix
Every likely cause, with its own real cost and time, not one blended guess for the whole repair.
| Cause | Approach | Cost | Time |
|---|---|---|---|
| Clogged Gutter or Downspout | DIY | $0 | 45–90 min |
| Loose Fasteners or Incorrect Slope | DIY | $10–30 | 30–60 min |
| Too Few Downspouts for the Roof's Water Volume | DIY | $30–80 | 60–90 min |
| Rotted Fascia, Failed Flashing, or Damage Requiring Height Access | Professional | $75–5,000 | 30–90 min |
3
Causes
Tap a cause to open it. Only one stays open at a time, so it's easy to compare.
4 · FAQ
Frequently asked questions
-
How often should I clean my gutters?
At least twice a year for most homes, typically spring and fall, more often if you have overhanging trees or live in a heavily wooded area.
-
Why does water overflow from just one section of my gutter?
This usually points to either a clog concentrated at that spot, or a sagging section that's lost its proper slope. Clear debris first, then check that section specifically for loose hangers.
-
Is it safe to clean gutters myself?
For a single-story home with a stable ladder and someone spotting you, generally yes. Anything above one story, a steep roof, or if you're not fully comfortable on a ladder is a reasonable point to hire a professional instead. The cost is genuinely modest compared to the fall risk.
-
How do I know if I need more downspouts?
If a gutter run is clean, well-sloped, and still overflows specifically during heavy rain, it may simply be undersized for the water volume it needs to handle, particularly if one downspout is serving well over 40 feet of gutter.
-
What does rotted fascia behind a gutter look like?
Soft, discolored, or visibly deteriorated wood directly behind or below where the gutter mounts. This needs repair before a gutter can be properly reattached, and is a job for a professional.
-
Can clogged gutters really damage my foundation?
Yes. Water that overflows repeatedly right next to the house can saturate the soil against the foundation, which over time contributes to cracking or settling issues that are far more expensive than gutter maintenance.
-
Why do clogged gutters cause damage beyond the gutter itself?
Overflowing water doesn't just spill onto the ground below. It can wash out landscaping, erode soil against the foundation, seep into a basement or crawl space, and back up under roof shingles at the edge, leading to roof leaks that have nothing to do with the roof's condition otherwise. Twice-yearly cleaning is genuinely one of the highest-leverage maintenance tasks for preventing much larger repairs.
-
How can I tell if it's a slope problem?
If water consistently pools or leaks at the end of a gutter run farthest from the downspout, rather than dripping randomly along its length, that's a strong sign of incorrect pitch rather than a simple clog. Worth checking hanger spacing and slope specifically rather than just cleaning it again.
References
Still deciding
Two other questions worth answering
This guide covers whether you can do the job yourself. These cover the two questions that often come before and after it.
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