The short answer
Once or twice a year suits a house with no trees nearby, with a check once the autumn leaves are down. Houses under or beside trees, and roofs shedding moss or grit, may need it every few months. Clean sooner if water spills over the edge, plants grow in the gutter or you see staining on the wall below.
What sets the timing
The right schedule depends on what falls into the gutter. Leaves are the obvious source, and a house with mature trees nearby can have a full gutter within weeks of leaf fall. Evergreens drop needles and debris all year, and blossom, seed pods and catkins add to the mix in spring and early summer.
The roof itself contributes. Moss growing on tiles washes down in rain, and concrete and some clay tiles shed grit and granules as they age. A roof thick with moss, or tiles that are losing their surface, fills a gutter with silt that sets like cement if left.
Shape and pitch matter. A shallow gutter fills sooner than a deep one, and a gutter with little fall holds water and debris where a well-pitched one would clear itself. For fall, Brett Martin's guide is 1 mm per 600 mm of run.
Where the house stands matters too. A building in an open site with no trees may go a year between cleans. One in a wooded lane, or beside a hedge, may need a clear-out in spring, late summer and after leaf fall.
Use your own gutter as the guide. If it is clean after six months, the interval is long enough, and if it is full, shorten it.
Seasonal timing
Late autumn is the most useful time, once the leaves have come down, so the gutter is clear for the wet winter when overflow does the most harm. A first look in early autumn can catch an early fall.
Spring is the second occasion. Winter debris, silt and seeds that have germinated can be cleared before growth takes off, and the gutters can be checked for damage from frost and storms. Heavy rain, wind and frost all test gutters, and Met Office averages for South Farnborough (1991 to 2020) include about 118 wet days a year and around 53 days of air frost.
After severe weather, glance at the gutter. A storm can bring down twigs and tiles, and a blocked gutter holding ice in a freeze can crack or pull away from its brackets.
Summer is quieter, but a check after seed and blossom drop is worthwhile under trees.
Do the work in dry weather where you can. Wet debris is heavy and slippery, ladders are less safe, and dry leaves are easier to lift out. Choose a calm day and do not work at height in wind or rain.
Our page on gutter guards explains how covers can reduce the frequency, though they do not remove the need to check.
Signs a clean is overdue
You can often tell from the ground. Watch the gutters in heavy rain. Water pouring over the front edge, running down the wall behind a downpipe, or dripping from a joint along the run shows a blockage or a fault.
Look for plants growing from the gutter, which means soil and debris have built up. Moss or green staining on the wall below, dark streaks, damp patches and peeling paint on the fascia all point to water going where it should not.
Inside, damp on a ceiling or wall near the eaves can come from a blocked gutter that has spilled into the roof edge. Our page on why gutters overflow goes through the causes.
Sagging is a warning too. A gutter holding a heavy load of wet debris can bow between brackets or pull away from the fascia. Clearing it quickly stops the weight doing lasting damage.
Sounds can tell you. Gurgling or a hollow trickle in a downpipe during rain, or silence where you would expect flow, suggests a partial or complete blockage.
If you see any of these, clean sooner than the calendar says, and look at the cause so the problem does not return.
Doing it safely, or having it done
Cleaning gutters is among the commonest causes of falls from ladders. Use a stable, correctly angled ladder with someone footing it, wear gloves, and never overreach. Where the gutter is above a porch, an extension or a steep drop, or the house has more than two storeys, use a tower or leave it to a professional.
Lift debris out into a bucket, using gloves or a scoop, and avoid pushing it into the downpipe. Flush with a hose to check that water runs freely, working from the end away from the outlet. Leave the high-pressure equipment in the shed: Marley does not recommend high-powered jet washing on tiles and slates, as it can damage them.
A professional clean is modest against the damage a blocked gutter can cause: Which? (Nov 2025) gives £75 to £350, ex VAT, for emptying front and rear gutters, a typical UK range.
While the gutter is open, we look at joints, brackets, falls and fascia, because a clean is the best moment to spot a fault. We photograph what we find and tell you whether anything needs more than clearing.
The gutters, soffits and fascias hub covers repairs and replacement.
