Blocked gutters rarely announce themselves dramatically. The problem builds gradually — until a single heavy rainstorm reveals that water has been going somewhere it should not for weeks or months. If you recognise any of the signs below, our gutter cleaning team can typically attend within 48 hours.
7 Signs Your Gutters Need Immediate Attention
1. Water spilling over the gutter edge during rain
The clearest sign. If water is pouring over the front of the gutter rather than flowing down the downpipe, there is a blockage. This is also the point at which every subsequent rainfall is driving water against your fascia boards, render, or brickwork.
2. Visible plants or moss growing in the gutter
If you can see green growth in the gutter from the ground, the blockage is well established. Where moss is also visible on the roof tiles themselves, a professional roof cleaning treatment addresses the source — stopping spores from washing down and re-blocking the gutter within weeks of a clean.
3. Damp patches on internal walls near the roofline
Damp appearing on ceilings or upper-floor walls is a serious sign. It indicates that water has already been breaching the building envelope — either through a failing gutter joint, a blocked downpipe, or an overflowing valley gutter behind a parapet wall. Get a professional inspection immediately.
4. Staining or streaking on the exterior walls
Dark vertical streaks running down render, brick, or painted surfaces below the gutter line indicate that overflow has been happening repeatedly. On stucco or painted properties in Chelsea, South Kensington, or Notting Hill, this staining typically requires professional render cleaning to remove fully.
5. Gutters that sag or pull away from the fascia
When a gutter fills with compacted debris and standing water, its weight increases significantly. Over time, the fixing brackets fail. A sagging gutter is both a blockage problem and a structural one. Contact us for a gutter inspection before the section detaches entirely.
6. Birds or pests showing interest in the roofline
Pigeons, starlings, and squirrels are attracted to gutters full of leaf debris and standing water. If you are noticing unusual bird activity around your gutters, or evidence of nesting material, a blockage is very likely present.
7. No visible water from downpipes during rainfall
If it is raining and no water is emerging from your downpipes at ground level, something is blocking the system. This can be a gutter blockage, a downpipe blockage, or in older properties, a collapsed section within an internal drainage run.
How Quickly Can Damage Occur?
Two weeks of inaction during autumn or winter can mean the difference between a £150 clean and a £3,000 repair. Victorian properties with original construction are more susceptible to moisture than modern builds — the materials absorb water faster and take longer to dry out.
What to Do Next
If you have identified one or more of the signs above, book a professional inspection as soon as possible. Do not attempt to clear the gutters yourself from a ladder. Our gutter cleaning service covers all central London postcodes and includes a full condition report after every visit.
If you have noticed any of these signs at your property, call ExteriorCare now on +44 7851 135711. We operate across central and North London — SW1, SW3, SW7, W1, W8, W11, NW3, NW8, and TW9 — and can typically schedule an inspection within 48 hours.
