Visible Sagging or Pulling Away
If your gutters are sagging in the middle of a run or pulling away from the fascia board, the mounting system has failed. This is usually caused by failed hangers, accumulated debris weight, or rotted fascia that can no longer hold screws.
Sagging gutters don't drain properly. Water pools in the low spots instead of flowing toward downspouts, adding even more weight and accelerating the problem.
Water Overflowing During Rain

If water pours over the front edge of your gutters during rainstorms, something is wrong. It could be clogs, improper pitch, undersized gutters, or a combination. Overflow sends water directly down your siding and into your foundation — exactly what gutters are supposed to prevent.
Staining on Fascia or Siding

Dark streaks or discoloration on your fascia board, soffit, or siding below the gutters usually means water is escaping the gutter system. It could be from leaking seams, overflowing edges, or damaged sections.
These stains mean water has been hitting that area repeatedly. The damage beneath the surface is often worse than what you can see.
Cracks, Holes, or Rust Spots
Small cracks and holes in gutters will only get larger. Rust spots on steel gutters indicate corrosion that will eventually eat through the metal. Even small openings let water drip onto your fascia and foundation.
Basement Moisture or Foundation Erosion
If you're seeing water in your basement or crawl space after rain, or if you notice soil erosion directly below your roofline, your gutters may not be capturing or routing water properly. These are signs that water is getting to your foundation instead of being directed away from it.
When to Call a Professional
If you're seeing any of these signs, it's time for a professional inspection. Many gutter issues are repairable — but the longer they're ignored, the more damage they cause to surrounding structures. Catching problems early saves money.