We fix the cause, not the symptom
If a gutter keeps overflowing we check the falls, the bracket spacing and whether the gutter is sized for the roof, rather than clearing it again every six months.
Roof Care / Guttering
Guttering Services in London
Repair, replacement, installation and cleaning of gutter systems that protect your building from water damage.
Get a guttering surveyThe cheapest repair on the whole building
This page is for anyone in South and West London with a gutter that leaks, sags, overflows or has left a dark stain running down the wall. K & M Roofing Solutions clears, repairs, resizes and replaces gutters, downpipes and hoppers on houses, flats and commercial buildings.
Guttering is the cheapest thing on a building to maintain and one of the most expensive to ignore. Water coming over the front edge of a gutter runs down the wall instead of into the drain, and a wall that never dries out means penetrating damp inside, blown render outside, rotten fascia behind the gutter and, where it soaks the ground at the base, movement in the foundations. Clearing a gutter costs a fraction of any of those.
The other thing worth saying is that a gutter which overflows again a month after being cleaned was never really blocked. Something else is wrong: the falls run the wrong way, the brackets have dropped, or the gutter is simply too small for the roof feeding it. We look for that rather than clearing it again and taking your money twice.
Blocked gutters behind a parapet are the commonest single cause of the damp we are called to, and on the Victorian terraces and interwar semis of our home borough they account for most of the winter work, which is set out on our page for roofing in Croydon, CR0.
Benefits
How we approach guttering
Repaired where repair works
A dropped bracket, a perished seal or one cracked section is a repair, not a reason to replace a run of guttering that is otherwise sound.
Gutters and roofline in one visit
The fascia behind a leaking gutter is usually rotten too. Doing both while the access is already up costs far less than two separate jobs.
Ahead of the planned work when water is hitting the wall
Water running down a wall is doing damage every time it rains, so overflow and blockage call-outs get priority over routine work.
What we offer
Guttering work we take on
Clearing and flushing
Gutters, hoppers and downpipes cleared of moss, leaves and silt, then flushed through to confirm water actually runs to the drain. Twice a year suits most London properties, and autumn matters more than spring because of leaf fall.
Repairs
Dropped and missing brackets replaced, perished union seals renewed, split sections swapped out and leaking joints resealed. Most gutter leaks are a joint or a bracket rather than the gutter itself, and repairing those is a fraction of a replacement.
Falls, sizing and overflow
Where a gutter overflows despite being clear, we re-set the brackets to correct the fall, or fit a deeper profile and additional outlets where the roof simply sheds more water than the gutter can carry. This is the fix for the problem that keeps coming back.
Full replacement
Failed cast iron, brittle sun-damaged uPVC and undersized systems replaced with new uPVC or, on period and conservation-area properties, aluminium and cast iron effect systems that suit the building.
Downpipes, hoppers and gullies
Downpipes renewed or re-routed, hoppers cleared and refitted, and the gully at the bottom checked, because a downpipe discharging into a blocked gully soaks the base of the wall just as effectively as a blocked gutter.
Fascias, soffits and roofline
The boards that carry the guttering repaired or replaced at the same time, which is almost always the sensible moment to do it.
See fascias and soffits replacementScope
Signs your guttering is failing
- Water spilling over the front edge during rain
- A dark vertical stain running down the wall
- Gutters visibly sagging between brackets
- Plants or grass growing out of the gutter
- Damp patches on internal walls near the roofline
- Dripping from a joint long after the rain stops
- Peeling paint or blown render below the gutter line
- Water pooling at the base of the wall by a downpipe
How it works
How our guttering service works
1
Free survey
We inspect the gutters, downpipes, brackets and the fascia behind them, and where possible watch where water actually goes rather than guessing. Under an hour on a typical house.
2
Diagnosis and itemised price
You get photographs, a clear statement of whether this is a blockage, a fall problem or a sizing problem, and an itemised price separating clearing, repairs and any replacement.
3
Clearing and flushing
Gutters, hoppers and downpipes are cleared by hand and flushed with water to confirm the run drains properly to the gully.
4
Repairs and adjustment
Brackets replaced and re-set to the correct fall, seals and unions renewed, and split sections swapped. Most domestic guttering work is done in a day.
5
Replacement where needed
Failed runs removed and new guttering installed, sized for the roof area feeding it and set to a proper fall, with the fascia behind it dealt with at the same time.
6
Final check and guarantee
We flush the finished system, check every joint under running water, clear the ground and issue the 10-year workmanship guarantee on replacement work in writing.
Why choose us
Why customers choose K & M Roofing
01
Certified HYDRONYLON applicators, a system most London roofers cannot offer.
02
One team for the whole job, from survey to sign-off.
03
Rated 5.0 by 60 customers on Google.
04
A full roofing contractor, so a slipped tile or perished flashing spotted from the gutter line is put right by the same team.
05
Transparent pricing with no hidden costs, and a 10-year workmanship guarantee.
Common questions
Frequently asked questions
Repair, in most cases. Dropped brackets, perished seals, a leaking union or one cracked section are all repairs, and they cost a fraction of a new system. Replacement makes sense when uPVC has gone brittle and yellow from years of sun, when cast iron has rusted through, or when the gutter is simply too small for the roof and no amount of repair will stop it overflowing. The survey tells you which, and we will say if a repair will do.
Because they were probably not blocked in the first place. The three usual causes are falls that run the wrong way so water sits and spills at the low point, brackets that have dropped and created a dip, and a gutter that is undersized for the roof area draining into it. Rear extensions and loft conversions often add roof area without anyone upsizing the gutter below it. All three are fixable, but not by clearing it again.
Twice a year for most London properties, and autumn is the one that matters. Clear once in early autumn before leaf fall gets going and again in late autumn when the trees are bare, and you avoid almost every winter overflow. Properties with no overhanging trees can usually manage on one visit a year, and valley gutters between terraces or between commercial bays need checking more often because they block silently.
As indicative UK market rates for 2026, gutter replacement runs roughly £30 to £70 per linear metre, averaging around £45 to £50, so 15 to 20 metres of gutter plus three downpipes comes to roughly £650 to £1,700. A semi-detached house in uPVC typically lands at £900 to £1,500, aluminium at £1,400 to £2,400, and a bungalow with no scaffolding at £400 to £700. On a two-storey house scaffolding adds £250 to £500 on top. Clearing rather than replacing is a different job entirely: £70 to £150 for a typical London house, or £85 to £155 for a three-bedroom semi, usually under an hour on site. Doing the guttering and the roofline together is worth £400 to £800 because you pay for one scaffold instead of two. Those are market figures rather than our quote, and a binding price from K & M Roofing Solutions follows a free survey.
Clearing and flushing a typical London house is a couple of hours. Repairs such as re-setting brackets, renewing seals or replacing a split section are usually done within the same visit. A full guttering replacement on a standard two-storey house takes a day, or two if the fascias and soffits are being replaced at the same time. Larger and commercial buildings depend mostly on access.
Yes, and they matter as much as the gutter. We clear and renew downpipes, refit and clear hoppers, and check that the gully at the bottom is actually taking water away. A perfectly clear gutter discharging into a blocked gully still saturates the base of your wall. We do not undertake underground drain excavation, and we will tell you plainly if the problem is below ground rather than above it.
Yes, and it is the most common cause of penetrating damp we see on London properties. Water running down a wall keeps the masonry saturated so it never dries out, which shows up inside as damp patches and outside as blown render and spalled brick. Where the overflow soaks the ground at the base of the wall it can affect the soil around shallow Victorian foundations, particularly on London clay, which shrinks and swells with moisture. That is why an overflowing gutter is worth dealing with in weeks rather than seasons.
Free on-site estimate
Let us talk about your roof
Tell us what is going on and we will arrange a free survey. No pressure, no hard sell, just honest advice and a clear price.
Kamil07593 196505
Mateusz07544 188268