New-build brick and render estate houses with grey tile roofs

Roofers in Harwell

Leaking tiles, worn ridges, failing flashings and full re-covers in Harwell, from the old cottages and farmhouses along the long village street to the Georgian brick houses and the newer roads that have grown up around them.

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Harwell's roofs, from stream to estate

Timber-framed cottages beside a village street — The long street and its old cottages

The Victoria County History describes a main street nearly three-quarters of a mile long, running roughly parallel to a small stream, with many old cottages and farm buildings built of brick or half-timber, often pargeted or rough-cast, under tiled or thatched roofs. Middle Farm is a half-timbered house, probably fifteenth century and remodelled in the sixteenth, with 1589 carved on a bracket. Timber-framed buildings like these have roofs that have shifted with the frame beneath them, so rafters are rarely straight and the covering rarely lies flat. A repair has to follow the roof as it is today, and that starts with a slow look from inside the loft as well as from a ladder.

Red brick houses under clay-tiled roofs — Georgian brick and the Geering almshouses

The same account notes several eighteenth-century houses in red or purple brick under tiled roofs, and the Geering almshouses of 1723, a single-storey block of red brick with gabled wings. Buildings of this period have steeper, simpler roofs than later ones, with brick chimney stacks, plain gable ends and old lead where roof meets wall. Clay plain tiles are the natural match for brickwork of this colour, and a patch of the wrong tone shows from the street, so a sample tile is held against the old roof in natural light before any order goes in. Single-storey ranges also have long, low eaves, so gutter falls and fascia boards deserve as much care as the tiles above them.

Concrete-tiled roofs on a modern estate — Newer roads and extensions

Harwell has long since spread beyond its historic street, and the newer roads that have grown up around the old village carry roofs of another character altogether. Concrete interlocking tiles, shallow pitches, flat-roofed extensions and lean-to conservatories all feature, and the brick and tile of the old street gives way to cladding and larger plots. Faults here are the ordinary, fixable sort: ridges on mortar alone, cracked or slipped tiles, perished felt over a porch, and valleys where leaves collect. Many can be dealt with in a single visit, and where a repair is enough, the repair is what goes into the written quote.

Harwell on the Thames Valley slope

Distance: 24 road miles east of central Swindon
Council: Vale of White Horse District Council
Conservation area: Harwell, designated on 22 July 1970
Council: Vale of White Horse District Council
Setting: Gently sloping ground north towards the Thames Valley, east of Wantage

Roof questions along Harwell's main street

Can a timber-framed Harwell cottage take a new tiled roof?

Often, but only after the frame and rafters have been checked. Old frames move, so we survey from the loft first and plan the work around what the timber can safely carry.

Does Harwell's conservation area limit what I can use?

Matching tiles, laid the same way, seldom raise a question. A different material on a street-facing slope is the point to call the Vale of White Horse planners.

Why do red-brick Harwell houses suit clay tiles?

Colour and texture. Clay plain tiles weather alongside old brick and look settled in a way concrete rarely does, which matters when the roof faces the street.

What roofs line Harwell's long main street?

Blocked gutter full of leaves overflowing down a brick wall

Long flat roof on a 1960s brick building being re-covered

The short answer

A mixed run. Tiled or thatched roofs sit on brick and timber-framed cottages and farm buildings, red or purple brick houses of the eighteenth century carry tiles, and newer roads add concrete tile and flat extensions. Each type ages differently, so the survey begins by identifying which you have.

Walking Harwell's main street takes in several centuries of roofing in a quarter of an hour. The Victoria County History, written in the 1920s, gives the baseline: brick and half-timber walls, with roofs either tiled or thatched. A century on, the street still mixes old and new, and its tiles, thatch, flashings, chimneys and gutters all age at different rates.

How does a timber-framed roof behave?

A frame built in the fifteenth or sixteenth century has settled, twisted and been propped, patched and altered since. The roof rides on that movement. Battens climb and dip over uneven rafters, a ridge line may sag, and a verge (the sloping edge finishing the roof beside a gable wall) can lean slightly from the wall. None of that is a fault by itself. What matters is whether rain is finding a way in, and whether the frame is still shifting.

What goes wrong with old clay tiles?

Plain clay tiles hang from small nibs on the battens and are secured by nails only at intervals. Nibs snap, nails rust and tiles slip, and frost can split a tile that has soaked up water. Swapping the odd tile is routine. Trouble begins when a whole slope is failing, and then taking the tiles off and hanging them afresh beats patching one more time. Our pitched roofing page covers how that is done.

Where do cottage roofs usually leak?

Seldom out in the open field of a slope. Leaks tend to start at a chimney, at the junction with a neighbour's roof, beside a dormer cheek or down a valley. A close look at those details tells us far more than a glance at the tiles, and each one is photographed for the quote. A stain on a bedroom ceiling has often travelled along a rafter from one of these spots, so we follow the damp up the roof to where it enters, rather than just treating the mark.

Re-lay or replace a clay tile roof here?

The answer

If most tiles are sound and the battens and nails have tired, stripping and re-laying the same tiles on new battens and underlay is often right. If many tiles are laminating or crumbling, replacement is the better answer. Clay can last for generations, so age alone is not the test.

People are often told that a clay tile roof is finished at sixty years. The evidence is less tidy than that. The BRE's environmental profiling scheme set a minimum life expectancy of 60 years for clay tiles, while an article on conserving historic buildings points to clay roofs that are centuries old as proof that sixty years is a poor rule. The deciding factor is the state of the tiles you actually own.

When is a re-lay the better job?

If the tiles ring when tapped, show a sound face and sit well, the weak points are usually the battens, the underlay beneath and the nails. A re-lay renews those parts and leaves the roof's appearance untouched. Broken tiles are made up from reclaimed stock that matches in colour and size. It tends to cost less than a new covering, and it saves good material from the skip.

When does replacement make sense?

Tiles flaking in layers, crumbling at the edges or cracking as they are lifted will not survive a re-lay. A modern clay plain tile in a matching tone then goes onto new battens and a breathable underlay. Pitch matters too: clay plain tile ranges set minimum pitches from 30 to 40 degrees depending on the type, so we check the data sheet against your roof.

What about the weight of the new covering?

A covering 15 per cent or more heavier is a Building Regulations matter, so we compare what you have with what you are moving to before quoting. Our roof replacement page explains the full process.

Whichever way it goes, the survey photographs show you the tiles we are talking about, so the choice rests on evidence from your own roof.

Our view

Judge the tiles one at a time before judging the roof by its age.

Who signs off roof work in Harwell's conservation area?

Rolled lead roof covering over a bay above white windows

Roofers on a slate roof along a limestone village street

The short answer

Planning questions, conservation area and listed building matters included, go to Vale of White Horse District Council. Notifiable roof work goes to Southvale Building Control, the council's joint service with South Oxfordshire, or else to a registered building control approver, and we tell you which applies and send in the notification.

Harwell's conservation area was designated on 22 July 1970 and covers about 18.68 hectares, according to the Vale's own conservation area map. Plenty of roof work inside it needs no application at all.

When do you need to ask the council?

Re-laying or patching in the same tiles, bedding a ridge again or renewing a flashing counts as maintenance. What draws the council's interest is change: a different type of covering on a slope facing the street, a reshaped chimney, or a roof window where passers-by will see it. Our ridge and verge page explains what a modern dry-fix ridge involves, which is worth knowing before you decide how a ridge is renewed.

Do Harwell's older listed houses need consent for roof changes?

Many of the older buildings along the street are likely candidates, and for a listed house, consent is needed before changing anything on the roof that bears on its character, the covering included. The Vale's planning team can tell you whether yours is on the list.

Which route covers a bigger re-roof?

Where a job touches under 25 per cent of the total building envelope and under 50 per cent of the roof, building control approval is generally not required. Past those limits an application is needed, through Southvale Building Control or a registered building control approver of your choice. Which of the two suits your house is something we sort out, and the notification is ours to make.

St Matthew's, the Church of England parish church begun about 1200 and topped by a west tower, is a landmark along the way. As a church in use it falls under the ecclesiastical exemption, so roof work there goes through the diocesan faculty system, not the council's listed building consent.

Who to ask about roof work in Harwell

Situation	Who to ask
Matching repair or patch	Usually no one; we confirm at the survey
New covering or roof window facing the street	Vale of White Horse District Council planning team
Listed house	The same planning team, before work starts
Large re-roof above the thresholds	Southvale Building Control or a registered approver

Roofing services in Harwell

Nearby towns we cover

Questions about roofs beside the Harwell stream

Why do the roofs on Harwell's older cottages sag and dip?

Usually because the timber frame below has moved over centuries, not because the covering has failed. A gentle dip is part of the building's character, and we repair around it. A dip that is deepening, or one with damp staining beneath, is a reason to look closer, and that is what the loft inspection is for.

Can you match the tiles on a Georgian brick house in Harwell?

Yes. We match colour, size and texture, using reclaimed clay plain tiles where they suit, and we show you the sample before it goes on the roof. A good match matters most on a slope that faces the street, where the eye picks up any mismatch at once.

Do you work on roofs in the villages around Harwell?

We do. Harwell lies within the 30 road miles around Swindon that we cover, and the villages near Wantage are included. The areas page lists everything we reach, and our 10-year workmanship guarantee is set out in writing.

Is a mortar-bedded ridge on an older Harwell house still acceptable?

BS 5534:2014 changed the position. Mortar on its own can no longer be trusted with ridge tiles, so a ridge bedded afresh is screwed or clipped down too, or a dry-fix ridge tested to BS 8612:2018 replaces it. Where wind reaches the ridge freely, we would put this upgrade near the top of the list.

Ask us about your roof

Tell us what’s happening and we’ll call you back.

Photos of what we find
A written quote
10-year workmanship guarantee

Or call 01793 626096