Why are my gutters overflowing even when I've cleaned them?
Overflowing gutters that were recently cleaned usually point to a downspout clog, an interior blockage further down the run, or an actual slope/pitch problem — not a sign the gutters need full replacement.
Likely causes, ranked by probability
- Most likely — the downspout is clogged, not the gutter: Water fills the gutter and overflows at the low point because the downspout itself is blocked further down, often at an elbow. Under Mount Dora's oak canopy, this is the most common cause of a 'just cleaned it and it's still overflowing' call.
- Common after storms — debris washed further down the run: A single hard rain can wash leaves and seed pods past the visible gutter trough and into the downspout or underground drain line, which a quick visual check from above won't catch.
- Less common — the gutter has lost its pitch: Gutters need a slight slope toward the downspout to drain fully. Fastener failure or sagging over time can create a low spot where water pools and overflows even with nothing blocking it — this needs a hanger/pitch adjustment, not just cleaning.
What you can safely check yourself
Run a hose into the gutter at the far end from the downspout and watch where the water stops moving — that tells you whether the problem is a clog (water backs up at one spot) or pitch (water sits and never reaches the downspout at all).
When this needs a licensed tradesperson instead
Gutter cleaning, downspout clearing, and re-hanging a sagging section is general handyman scope. Full gutter replacement or a fascia-board repair behind a long-overflowing gutter can cross into carpentry/roofing-adjacent work — we'll tell you plainly if a job has reached that line.