Common Gutter Problems and How to Fix Them

Problem-by-problem fixes

• Leaking at seams or joints. The most common gutter complaint. Clean the area, let it dry fully, and apply a gutter-specific sealant (not general-purpose caulk) to the joint. If leaking persists after resealing, the joint connector itself may need replacing.
• Sagging sections. Almost always caused by hangers that are loose, too far apart, or were installed into weak fascia. Fix by adding hangers to reduce spacing (aim for 24-36 inches) and confirming the fascia they're anchored into is solid, not rotted.
• Overflowing during moderate rain (not just heavy storms). Usually debris clogging the trough or downspout, or a slope that's too flat or even reverse-pitched from settling over time. Clean first; if overflow continues on a clean gutter, check and correct the slope.
• Pulling away from the house. A more serious sign — often rotted fascia board behind the gutter no longer holding the hangers securely, or hangers that have simply failed with age. This usually needs a professional look, since the fascia itself may need repair before gutters are reattached.
• Rust spots or holes (on steel gutters). Small spots can sometimes be patched, but widespread rust usually signals it's time to replace that section — patched rust tends to return and spread.
• Downspout clogs. Water backs up at the top of the downspout instead of flowing through. A plumber's snake or a garden hose on high pressure fed from the bottom up often clears it; persistent clogs may need a downspout with a wider diameter or a cleanout access point added.

Pro tip from our network contractors

Before resealing a leak, make sure the surface is completely dry and free of old, failed sealant residue — new sealant applied over old residue or a damp surface often fails again within months, making it look like the repair "didn't work" when really it was never properly prepped.

When a repair isn't enough

If you're seeing multiple problems at once — sagging, leaking, and pulling away, all on an older gutter system — that combination usually means the gutters have reached the end of their useful life rather than needing another round of spot repairs. See signs you need new gutters to make that call, and types of gutters, explained if you're comparing replacement options.