A gutter has one job: move water off your roof and away from your walls as quickly as possible. When it does that, nobody notices. When it doesn't, you find out the hard way — a damp patch on an inside wall, a green stripe of algae down the render, or a flowerbed that has quietly turned into a pond. Factor in years of moss, tile grit and last autumn's leaves, and a gutter can be running at half capacity with nothing obvious to show for it.

The good news is that gutter maintenance is not complicated. It is a seasonal habit: a couple of hours in spring, a longer session in autumn, and a handful of checks in between. Work through the year in that rhythm and you will spend far less time dealing with the consequences.

What Blocked Gutters Actually Do to a House

Water that cannot get into the gutter, or cannot get down the downpipe, still has to go somewhere. Usually it goes backwards, over the rear lip of the gutter, where it soaks the fascia board and the soffit behind it. From there it tracks down the wall, stains the brickwork or render, and in winter freezes and expands, which is what cracks render and lifts paint.

At ground level, the results are just as annoying. Soil gets washed away from the base of the wall, paths and patios stain, and water sits against the foundations instead of heading for the drain. Occasionally it finds its way into a loft. Two faults cause most of this: a blockage, or a gutter that has lost its fall so water simply sits in it. Both are easy to spot once you know what you are looking for.

Watch your gutters during heavy rain. If water is pouring over the front lip at a particular point on the run, the blockage or the low spot is usually within a metre of it.

The Kit That Makes the Job Quicker

You can clear a gutter with a ladder, a bucket and a pair of gloves. A few inexpensive extras turn a miserable job into a manageable one:

• A sturdy ladder with a stand-off bracket or ladder mat, so the weight sits against the wall rather than the gutter
• A bucket with a hook that hangs on the ladder, leaving both hands free
• A plastic gutter scoop or a small trowel — plastic will not scratch aluminium or uPVC
• Thick gauntlet gloves and eye protection
• A stiff hand brush for the last of the grit
• A hose or a watering can, for testing the flow afterwards
• Drain rods or a flexible downpipe brush for blocked downpipes
• A torch, so you can see along the run and into the hopper head
• A tube of gutter sealant and a couple of spare brackets for running repairs

Working at Height Safely

The cleaning is rarely the difficult part; the access is. A few habits make the difference between a straightforward morning and an injury:

1. Place the ladder on firm, level ground and secure it before you climb. On soft grass, use a board under the feet.
2. Use a stand-off so the ladder rests against the wall, never against the gutter itself.
3. Keep three points of contact at all times, and move the ladder rather than stretching sideways along the run.
4. Do not work in wind, rain, ice or poor light. Wait for a dry, still day.
5. Keep well clear of overhead cables and satellite dishes.
6. Never walk on the roof to reach a gutter unless you are trained and equipped for it — tiles and slates are brittle and unforgiving.
7. Wash your hands and any grazes afterwards. Gutter sludge carries grit and moss spores, and bird droppings are best treated with a little respect.

If your gutters are more than two storeys up, or the roof is steep, fragile or awkward to reach, treat the job as professional work. A tower scaffold or a gutter vacuum service costs less than a broken wrist, and the check that comes with it is often worth having.

Spring and Summer: Clear, Test, Repair

Spring is the clean-up after winter. Start at the far end of the run and work towards the downpipe outlet, scooping debris into the bucket as you go rather than flicking it onto the ground below. Once the channel is clear, flush it with a hose and watch where the water goes.

While you are up there, check the things that winter tends to knock about: joints that have opened up, brackets that have pulled loose, screws that have rusted, and sections that have started to sag. A gutter should hold a slight fall towards the outlet — roughly a few millimetres every metre, enough to keep water moving but not enough to look obvious. Standing water ten minutes after the rain stops means the fall is wrong or there is a low spot.

Summer is the quiet season, but not a wasted one. If you noticed overflow in spring, this is the time to reseal a joint, replace a bracket or rehang a section properly, before the leaves arrive.

Autumn: The One That Really Matters

Most of the year's debris lands in October and November. If you do one job, make it this one. Clear the gutters in early autumn before the bulk of the leaves come down, then check again in late November or early December once the trees are bare.

If you have sycamore, ash, oak or willow within about ten metres of the house, that schedule needs to be tighter — every few weeks through the falling season is realistic. Leaf guards and gutter filters reduce the frequency but they do not remove the need to clear; they simply catch the debris in a different place, and they soon clog if left alone. Check the hopper heads at the top of downpipes too, since this is where leaves tend to gather and form a plug.

Winter: Frost, Snow and Storm Damage

Water left standing in a gutter is a problem in winter, because it freezes and expands. That pressure is enough to open joints and push brackets away from the fascia. Clear out the last of the autumn debris before the first hard frost and you remove most of that risk.

If ice does build up, do not chip at it with a metal tool or pour boiling water into the gutter. Use a plastic scoop and warm water, or simply leave it. After a storm, walk the outside of the house and look along the gutter line for sections that have dropped, pulled apart or come away altogether. Check that downpipes are still discharging freely and that the ground around them drains properly.

When to Call in a Roofer

Gutter cleaning is a sensible job to do yourself on a single-storey extension or a bungalow. The balance shifts when height, steep ground, fragile roof coverings or tricky access are involved, or when the problem is not debris at all.

Bring in a professional if water still overflows after a thorough clean, if sections are cracked, rusted through or pulling away from the fascia, if the timber behind the gutter feels soft, or if damp is appearing inside the walls. A roofer can rehang a run with the correct fall, renew a downpipe, fit a suitable leaf guard and check the fascia and roofing above at the same time. If water has already found its way into the structure, or you are unsure how far the damage goes, get advice from a qualified professional before you start decorating over it.

Two clear-outs a year and a quick look after every storm is all most homes need. It is unglamorous work, but it is the cheapest damp-proofing you will ever do.

Photo: manfredrichter / Pixabay