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Roof cleaning and moss removal in Stow-on-the-Wold — hilltop stone slate cleaned by hand, not pressure.

Gloucestershire Roof Cleaning cleans roofs in Stow-on-the-Wold: a low-pressure clean or a manual moss scrape, finished with a biocide treatment. Most roof cleans are £550–£950, including a free gutter clear and a 2-year moss-free guarantee. Need the gutters done on their own? Our gutter cleaning covers Stow-on-the-Wold too, from £90.

Free gutter clearance and free biocide on every Stow roof clean. Exposed, damp, listed and conservation-area cottages handled correctly.

Fully insured for work Roof Cleaning Specialists 2-year guarantee

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The same concrete-tile roof after roof cleaning and moss removal
Concrete-tile roof covered in moss and algae before roof cleaning
Before After
Stow-on-the-Wold roofs, specifically

800 feet up on an open wold: why Stow roofs rarely dry out.

There's an old couplet about this town: "Stow-on-the-Wold, where the wind blows cold." It's etched on the wall of St Edward's Hall in the Market Square, and it tells you everything you need to know about why roofs up here struggle. Stow is the highest town in the Cotswolds, standing 800 feet up on the top of an open hill where eight roads meet, with the Roman Fosse Way running through. Down in the sheltered valleys of Bourton or the Swells the weather passes over; up on the wold it sits. Wind, cloud and damp linger across the rooftops far longer than they do lower down, and that constant moisture is the single biggest reason Stow roofs carry such heavy growth.

The layout of the town keeps that damp in. Stow is built around a large market square with tall stone buildings on every side, and the narrow passages locals call "tures" — made narrow and winding to funnel sheep into the market — run off it between high walls. Rear pitches along Sheep Street and Digbeth Street and the shaded side of the Square see little direct sun in winter. On those roofs we typically find moss packed into the stone, lichen spread across the slates and gutters full of what has washed down.

Wind is the other half of it. On an open hilltop there's nothing to break the weather, and rain gets driven up under the laps and into the joints of the slate. The town is built from oolitic limestone, with Cotswold stone slate on many of the older roofs from its wool-trade days, and that porous stone takes on whatever water the wind pushes into it.

That's why method matters. Pressure would split the slates and force more water under them, and a broken stone slate has to be replaced with reclaimed stone. So in Stow the moss is taken off by hand from a roof ladder that spreads the load, and the roof is then treated with biocide.

Further out, toward the A429 and on the newer housing at the edges of town, roofs are mostly concrete interlocking tile, with some Welsh slate and plain tile on later extensions. They're just as exposed. Depending on the tile they get a low-pressure clean or a hand scrape, then the biocide.

What we clean in Stow-on-the-Wold

The four roof types that turn up on Stow quotes.

Four coverings make up nearly every Stow roof we price, and no two are cleaned quite the same way.

Traditional Cotswold stone slate

On the townhouses and cottages around the Market Square, Sheep Street, Park Street and Digbeth Street. Thin, porous limestone slates in graded courses, which the local conservation guidance expects to stay as Cotswold stone. We clear them by hand from a roof ladder and keep the biocide off lime mortar and lead.

Hand-made & natural clay tile

On some cottages and outbuildings in town and out at Maugersbury, Broadwell and the Swells. Old clay is fragile when wet and suffers in frost on this high ground, so it's scraped by hand in dry weather, carefully around ridges, hips and valleys.

Welsh & natural slate

On some later Georgian and Victorian buildings and extensions. The slate itself is tough, but on an exposed hilltop the lead flashings and ridge mortar are what keep the rain out, so we clear the laps by hand, rinse at low pressure where appropriate and leave those details untouched.

Modern concrete tile on the town edge

Marley and Redland interlocking tile on newer housing at the edges of Stow and off the Fosse Way. Spores lodge in the rough surface and the hilltop damp keeps it wet. We hand-clear the bulk of the moss, then apply biocide.

Where we work in Stow-on-the-Wold

The Stow streets and villages we're on roofs in most.

From the Square and the tures out to the GL54 villages around the town — the hilltop roofs are the most exposed, the valley ones the most shaded.

Market Square & the tures

The heart of the town around St Edward's Hall, the old market cross and stocks, ringed by tall stone townhouses and threaded with the narrow medieval "tures" — shaded, listed, on porous stone slate that gets hand-scrape only.

Sheep Street & Park Street

The old approaches off the Square lined with stone cottages, inns and townhouses — north-facing pitches that hold damp long after the rain has gone, where heavy moss calls for a careful, slow hand-clean.

Digbeth Street & Church Street

The streets dropping away toward St Edward's Church and its famous yew-tree door — historic stone houses and cottages, much of it inside the conservation area, all on heritage stone slate that we treat by hand.

Maugersbury & Broadwell

The quiet stone hamlets just east and north of the town — small, shaded Cotswold cottages on stone slate and clay, often second homes and holiday lets, where moss takes hold quickly in the cold, damp upland air.

Lower & Upper Swell

The two Swells villages in the valley below Stow, covered by the same neighbourhood plan as the town — classic stone-slate and clay cottages in a damp, sheltered river setting where growth thrives on shaded pitches.

The town edge & the Fosse Way

The newer housing around the edges of Stow and the homes strung along the A429 — a mix of modern concrete tile, Welsh slate and later additions, all greening readily in this exposed hilltop position.

Listed and conservation work

Around the Square and the tures: working on Stow's protected roofs.

Stow's centre is a designated conservation area full of listed buildings, and one of the most consistent examples of Cotswold stone building anywhere in the Area of Outstanding Natural Beauty. The Square, St Edward's Church and St Edward's Hall, and the merchants' houses on Sheep Street and Digbeth Street share the same stone and the same stone-slate roofs. Our job on them is to take off what's growing and leave the slate intact.

Clearing moss and algae doesn't normally require listed building consent, as the fabric isn't altered. Work on the mortar, lead or original slate fixings can, and if a roof needs it we'll tell you before booking so you can talk to Cotswold District Council's conservation team. The local design guidance wants original stone-slate roofs kept and repaired like-for-like in Cotswold stone, not replaced with artificial tile or blue slate, so cleaning without breaking slates is the whole point. Lime mortar is sheeted and rinsed, and weathered lead is left alone.

It's worth remembering why Stow looks the way it does. The town grew up at the junction of the Fosse Way and seven other roads, and it grew rich on the medieval wool and cloth trade — Daniel Defoe famously reported 20,000 sheep sold here in a single day at the great fairs. The narrow tures off the Square were built deliberately tight and winding to funnel those sheep to market. In 1646 the last pitched battle of the first Civil War was fought on the wold just outside the town, the defeated Royalists driven back into these very streets and held prisoner in St Edward's Church. That history is why people come to Stow, and why a green roof on the Square gets noticed.

Before the survey we look the building up on the Historic England list. If it's listed, we know the grade before we arrive and plan the job around it.

How a Stow-on-the-Wold job runs

Four steps. Same on every roof.

Free survey

We look at the roof, the gutters and the access — on the Square that includes the pavement, parked cars and whoever's trading below. You get a written price, and any listed-building point is raised before you commit.

Manual moss removal

Bulk moss is scraped off by hand from a ladder, tower or roof ladder, and the gutters are cleared at the same time. Stone slate is never put under pressure.

Biocide treatment

An approved biocide is applied at the right dilution to kill algae, lichen and spores at the root. Up on the wold, where the weather sits on the roofs, that treatment is what holds the result.

Two-year protection

Guaranteed against moss, algae and lichen for two years. If regrowth appears in that time, we return and re-treat it at no charge. Written into every quote.

The offer, on Stow jobs

Gutters cleared and biocide included, by the same insured team.

Gutter clearing and the biocide treatment are both included on every Stow roof clean. We're on the ladders for the slate anyway, and on a hilltop this exposed the biocide is what makes the clean last.

Wind-driven rain is a fact of life at 800 feet, and a gutter choked with moss sends it straight over the edge and down the wall — and, on the Square and Sheep Street, onto the pavement below. We clear them as we go. The biocide then keeps working on the slate well after we've packed up, keeping moss off for two years.

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Stow-on-the-Wold roof cleaning prices

How much does roof cleaning cost in Stow-on-the-Wold?

Expect most Stow-on-the-Wold roof cleans to cost £550–£950. That covers the moss removal, the biocide and a free gutter clear; larger, steeper or harder-to-reach roofs cost more. A tall townhouse on the Square, with a shop below and stone slate above, is a different job from a bungalow on the edge of town, so we quote after a look rather than a phone call.

What moves the price:

  • The size of the roof and how many pitches
  • Stone slate (by hand, never pressure) or modern tile
  • Working on the Square or in the tures, around shops and parked cars
  • How heavy the growth is on an exposed hilltop roof
  • Number of storeys, and the taller townhouses around the Square

Always included, never an add-on: a free gutter clear while we're up there, and the biocide that keeps moss off for two years.

How we quote: a free no-obligation survey, a written price the same day, no deposit, pay only when it's done. See our full roof cleaning cost guide → Also worth reading: is roof cleaning safe?, why clean your roof?, how to get rid of roof moss for good and the best time of year to clean a roof.

Stow-on-the-Wold common questions

The things Stow customers actually ask.

How much does roof cleaning cost in Stow-on-the-Wold?

At Gloucestershire Roof Cleaning, most roof cleans in Stow-on-the-Wold cost £550–£950, including moss removal, a biocide treatment and a free gutter clear. Larger, steeper or harder-to-reach roofs cost more. We give you a written price the same day after a free survey, with no deposit — you pay when the job's done. See the full roof cleaning cost guide.

Can my Stow stone-slate roof be cleaned without damage?

Yes, provided nobody uses pressure on it. The stone slate around the Market Square, Sheep Street and Digbeth Street is porous limestone laid in graded courses on old timbers, and it splits if it's blasted. We scrape the moss off by hand from a roof ladder, then apply biocide. Concrete tile on newer houses at the edge of town can have a low-pressure clean where that suits; the biocide is what keeps both clean.

Why is moss so bad on Stow roofs?

Height and exposure. Stow is the highest town in the Cotswolds, about 800 feet up on an open hilltop — hence the old saying, "Stow-on-the-Wold, where the wind blows cold." Cloud and damp sit over the town longer than in the valleys below, and the shaded sides of the Square and the narrow tures barely dry. Porous stone slate holds that moisture, and moss, lichen and algae do well on it.

How long does a Stow roof stay clean after treatment?

Two years, guaranteed. The biocide we apply keeps killing fresh spores after we've left site, and if regrowth appears within two years we come back and re-treat it at no charge. On a hilltop with a long damp season that matters: a roof that's only been washed tends to go green again by the next winter, because the spores are still in the stone.

Is the biocide safe around gardens, animals and the open wold?

Yes, applied properly. We use an approved biocide at the maker's dilution, in dry weather, so it stays on the roof. Pets need to be kept in while we spray and for an hour afterwards. Window boxes and borders are covered and rinsed, and where gardens on the edge of town back onto fields we take care with run-off.

Can you clean a listed roof in the Stow conservation area?

Yes. The town centre is a conservation area with many listed buildings, from St Edward's Church and St Edward's Hall to the cottages on Sheep Street, Park Street and Digbeth Street. We clean those roofs by hand and never use pressure, and we cover and rinse lime mortar and lead so biocide doesn't sit on them. Moss and algae removal doesn't normally need listed building consent; work on mortar, lead or slate fixings might, and we'll raise it at the survey so you can ask Cotswold District Council first.

Why is Stow's stone slate never pressure-washed?

Because once it's broken it has to be matched with reclaimed stone. The local conservation guidance expects original stone-slate roofs in Stow to be repaired like-for-like in Cotswold stone, not with artificial tile or blue slate. Pressure splits thin limestone slates, washes out the bedding and drives water under the laps. Hand removal and biocide take longer, but they leave the slate as it was.

Will you walk on my Stow roof?

We try not to. Stone slate and old clay crack underfoot, so most of the work is done from ladders and towers, and if we need to be on the pitch we use a roof ladder hooked over the ridge. On the tall townhouses around the Square we plan this at the survey, including where the ladders stand on the pavement.

I own a holiday let or second home on the Market Square. Can you do the job while I'm away?

Yes. We can price it from your photos and the survey, and book the work into a gap between guests or a week when the property is empty. On the Square that also means fitting around the shops, cafés and parked cars below, so we agree the timing and where the ladders go before the day. You don't need to be there; we can deal with you by phone and email throughout.

What's the point of cleaning a Stow roof?

Longer life for the slate — moss keeps stone wet, frost on an exposed hilltop then does the damage, and replacement stone slate has to be reclaimed. Working gutters — moss washed off the roof blocks them, and the overflow runs down the wall and onto the pavement. Appearance — Stow depends on visitors and buyers who come for the stone, and a green roof undoes that. Cleaning costs far less than repairs.

When should I book a roof clean in Stow?

Spring or early autumn if you can. The biocide needs a dry day or two to take, and up on the wold the damp season starts early and finishes late. We work all year, but at this height we pick our weather rather than treat a wet roof.

Are you insured?

Yes — Gloucestershire Roof Cleaning carries £5m public liability insurance.

Stow-on-the-Wold roof in need of attention?

Townhouse on the Square or cottage in the Swells, the moss comes off by hand and the biocide and gutter clear are included. Fully insured; send the address for a written quote the same day.

Where we work

Roof cleaning across Stow-on-the-Wold and the surrounding area.

Call 07555 141504 Free quote