Signs your gutters need
cleaning — spot them early.

Most blockages are invisible until they cause damage.

A blocked gutter does not announce itself immediately. Debris accumulates silently over weeks and months, and the first visible sign for most homeowners is overflow during heavy rain — or, worse, a damp patch on an interior wall. Here are the nine signs that indicate your gutters need attention, most of which can be checked from the ground without a ladder.

Sign 1 — Water cascading over the front edge during rain

The most obvious sign. If water flows over the front edge of the gutter during or after heavy rain, the gutter is blocked at that point, the downpipe is blocked and the gutter is backing up, or the gutter lacks sufficient fall toward the downpipe. Overflow from a specific section indicates a local blockage; overflow starting from the downpipe end suggests a blocked downpipe.

Sign 2 — Drips from behind the gutter in dry weather

Water dripping from a specific point in dry weather after rain — not during rain — almost always indicates a failed joint gasket. The water is pooling behind a leaking union piece and dripping slowly. This will worsen over time as the failing joint allows more water to contact the fascia board.

Sign 3 — Green or black staining on the wall below gutters

Green algae or black streaks running vertically down the wall directly below a gutter line are a reliable indicator of chronic overflow. This staining is a historical record of where water has been going — it indicates a persistent problem, not a single event. Particularly visible on white-rendered properties across Farnborough and Fleet.

Sign 4 — Plants growing inside the gutter

Visible moss, weeds or seedlings growing from inside the gutter indicate debris has been accumulating for at least one to two seasons. The debris provides sufficient organic material for plants to establish. This is more common than homeowners expect — we regularly clear gutters where birch seedlings and buddleia have established inside the channel.

Sign 5 — Sagging gutter runs

Look along the gutterline from ground level. A visible sag — a section hanging lower than adjacent sections — indicates bracket failure, a bracket that has pulled away from the fascia, or the weight of accumulated debris pulling the gutter down. A sagging gutter retains standing water in the low point, breeding moss and accelerating further blockage.

Sign 6 — Staining or discolouration on the fascia board

Dark staining or watermarking on the visible face of the fascia — particularly below gutter joints — indicates water has been getting behind the gutter and running down the board face. On painted timber fascias, paint blistering near gutter fixing points is particularly telling.

Sign 7 — Damp patches on interior walls near the roofline

This is the sign you do not want to see — it means water has already entered the building. Damp patches on ceiling corners or external walls near the eaves often trace back to blocked gutters overflowing against the fascia. Note that these patches may appear days or weeks after the rain event that caused them, as moisture migrates through the structure.

Sign 8 — Visible debris or standing water in the gutter

If you can safely see into your gutter — from an upper window, a dormer, or a phone camera held up — and see packed leaves, silt, standing water that is not draining, or plant growth, the gutter needs clearing. Standing water indicates either a downstream blockage or a section with insufficient fall.

Sign 9 — No audible flow from the downpipe during rain

A clear downpipe makes a distinctive sound during heavy rain. If you stand next to your downpipe during rain and cannot hear flow, or there is no water at the outlet, the downpipe may be blocked. A blocked downpipe causes the full gutter run above it to back up and overflow.