Why Clogged Gutters Are Serious
Gutters exist to route water away from your home's foundation, walls, and roof. When they clog, water has nowhere to go — and it goes into places you don't want it. Foundation repair averages $4,500–$10,000. Fascia replacement runs $6–$20 per linear foot. A $150 gutter cleaning prevents both.
The 7 Warning Signs
1. Water Spilling Over the Sides
The clearest sign: rain pours over the front edge of your gutters instead of through the downspout. This means the gutter is full of debris and can't carry the water load. Don't wait for the next rain to confirm — check by running a hose from the roof edge.
2. Sagging or Separated Gutters
Wet debris is heavy. A section of gutter full of wet leaves can weigh 30–50 pounds. This weight pulls gutters away from fascia boards, bends hangers, and creates low spots where water pools year-round. Look for sections that dip or have visible gaps at the wall.
3. Plants Growing in Your Gutters
If you can see grass, moss, or small shrubs growing in your gutters from the ground, you have a serious accumulation problem. Seeds land in debris, take root in the wet soil-like composted leaves, and their roots can physically crack gutter joints.
4. Water Stains on Siding or Fascia
Dark streaking on your home's siding directly below the gutter line means water is consistently overflowing. Long-term, this leads to rot in wood siding and fascia, and eventual structural damage.
5. Pest Activity Near Gutters
Clogged gutters are prime real estate for mosquitoes (standing water is a breeding ground), wasps, birds, and squirrels. If you're seeing unusual pest activity along your roofline, dirty gutters may be the attractant.
6. Water in Your Basement After Rain
Clogged gutters dump water directly at your foundation instead of 4–6 feet away via downspout extensions. Over time this saturates the soil against your foundation and allows water to seep in. If basement water intrusion coincides with heavy rain, check your gutters and downspout discharge points first.
7. It's Been More Than 12 Months
If you genuinely can't remember the last time your gutters were cleaned, that's the sign. Twice-yearly cleaning is the standard recommendation. Once a year is the bare minimum for low-tree-coverage properties. If it's been two or more years, assume they need cleaning regardless of what you can see from the ground.
What to Do Next
If you spotted any of these signs, schedule a cleaning soon — ideally before the next major rain event. A reputable gutter cleaner should also do a quick inspection of downspout flow, joint condition, and slope, not just scoop out the debris.