The signs you can see from the ground
Guttering rarely fails without warning. It gives plenty of visible clues long before water starts finding its way somewhere it should not, and almost all of them can be spotted safely from ground level.
- Water spilling over the front edge of the gutter during rain, rather than running along it to the downpipe.
- A vertical stain, green algae streak or damp patch on the wall below a joint, outlet or corner.
- Grass, seedlings, moss or visible debris sitting along the top of the gutter line.
- A downpipe that stays quiet in heavy rain while others are clearly running.
- Water dripping steadily from a joint or from the underside of the gutter long after rain has stopped.
- Staining, mould or peeling paint on the fascia and soffit directly beneath the run.
- A gutter section that visibly dips in the middle or looks out of line with the roof edge.
Watching what happens in the rain
The single most useful check costs nothing. Stand back from the house during a decent downpour, umbrella up, and watch each elevation in turn. Working guttering is quiet and undramatic: water arrives, runs along the fall, and disappears down the pipe.
What you are looking for is water going anywhere else. A curtain of water over the front lip means the run is holding debris or water and has nowhere to put the extra. Water spraying sideways from a joint suggests a failed seal or a section pulling apart. A dry downpipe on an elevation that should clearly be draining means the outlet is blocked.
Note which elevation and roughly where along the run. It saves time later and it is exactly the information that makes a quotation accurate rather than a guess.
What the marks on the wall are telling you
Green algae streaking down a wall below the gutter line is one of the clearest signals there is. Algae needs sustained moisture, so a defined green stripe below a joint means water has been escaping in that spot repeatedly, not once.
On render, that persistent damp encourages organic growth across the surrounding area and can leave a mark long after the leak is dealt with. On brick, you may see darker staining and salts. Either way, cleaning the wall before fixing the cause simply resets the clock.
Damp appearing internally near the ceiling line of an upstairs room, or a musty smell in that corner, is a reason to look at the guttering above it sooner rather than later.
Why properties differ so much
Trees are the biggest single factor. A house with mature trees close by, or under a flight path of overhanging branches, collects leaf litter every autumn and often needs clearing more than once a year. An exposed house with clear roofline can go a great deal longer.
Roof moss matters just as much and is often overlooked. Moss breaks off tiles in wind and rain, washes down into the gutter line and blocks outlets and downpipes. If the debris coming out of your gutters is mostly moss rather than leaves, the roof itself is worth assessing.
Gutter guards and brushes help in some situations and cause problems in others: they can trap fine silt and moss fragments on top rather than letting them wash through, which is harder to see and harder to clear.
What you can safely do yourself
Ground-level observation, photographs from a phone camera zoom, keeping the area below the run clear, and checking that gully grates at the base of downpipes are not silted up are all reasonable homeowner tasks.
Working at height is where it stops being sensible. Ladder work over a hard surface, on soft ground, at an awkward angle or on a two-storey run is how people get seriously hurt, and leaning a ladder against the gutter itself often damages the run you are trying to clear.
This is genuinely a case where the assessment is more valuable than the effort. Knowing which run is blocked and why is most of the job.
What clearing does and does not cover
Gutter clearing removes leaves, silt, moss and debris from the runs and outlets so water flows to the downpipes again. On suitable properties much of it can be done from the ground with a high-reach vacuum, with camera inspection to show the condition before and after.
It is not the same as gutter repair, and it is not underground drainage work. Loose brackets, sagging runs, failed joints, cracked or brittle sections and runs installed with the wrong fall are reported with photographs rather than repaired as part of a clearing visit. Blocked underground drains beyond the gully are a separate trade again.
If you have seen any of the signs above, send photographs and your postcode along with which elevation is affected. We will tell you whether it looks like a straightforward clearing job or something that needs a closer look first.