Oxfordshire · England
External & façade joints in Long Wittenham, Oxfordshire
We cover Long Wittenham for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
Long Wittenham buildings and the weather
Historic houses like Clifton Hampden Manor (about 1.2 miles north) are a reminder that the area around Long Wittenham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Appleford station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like Long Wittenham (Church of England) Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Long Wittenham is about 3 miles north-east of Didcot, in Oxfordshire. Every kind of property in Long Wittenham can book us for external mastic, old or new, large or small. The work is guaranteed for a year. 443 places in Oxfordshire are on our list, from the larger towns to small villages. We also work in Oxford, around 8 miles away.
Every address in OX14 is covered for external mastic, from the main roads to the quietest streets. We cover properties on High Street, Didcot Road and Wessex Way and the roads around them. If you’re just outside Long Wittenham, we cover Clifton Hampden (1 mile north), Appleford-on-Thames (1 mile west), Culham (2 miles north-west), Didcot (3 miles south-west) and Sutton Courtenay (3 miles west). Further out, we also cover Oxford (8 miles north), Abingdon-on-Thames (4 miles north-west), Thame (13 miles north-east), Wantage (10 miles west), Henley-on-Thames (15 miles south-east) and Grove (9 miles west).
Landmarks near Long Wittenham
Locally, jobs take us to homes and businesses close to The Plough Public House, among other places. The closest station to Long Wittenham is Appleford station, about 1.3 miles west of the centre. A little further out are Brightwell Castle (2.6 miles south-east) and Pendon Museum (less than half a mile west). Green spaces nearby include Wittenham Clumps and Mowbray Fields.
External mastic in Long Wittenham, done properly
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you’re dealing with sealant pulling away from one side of the joint and panel joints letting water in, we can help, on joints between brick and frames, brickwork movement joints and concrete & block alike.
In a village or hamlet like Long Wittenham, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Your job is guaranteed for a year, as with all our work.
- Location
- Long Wittenham (OX14)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Long Wittenham
What else we do in Long Wittenham
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What happens on the day
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. For a village or hamlet like Long Wittenham, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Clear the area around the work
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
How to get a quote
For external mastic in Long Wittenham, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
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How we quote for external mastic
Your quote is based on your job. We take into account:
- Access and height
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
What the job involves on each surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
Landlords, agents and businesses in Long Wittenham
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Damp that is not coming from the joint
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
What we seal
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Concrete & block
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. In a small place like Long Wittenham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not guesswork. That is why we ask about the job first and agree the price before starting.
What you get with us
- Fully insured
- We never seal over old sealant
- We agree the colour with you first
- More than 20 years in sealant work
Take a look at how sealant jobs are priced and customer reviews.
Common questions in Long Wittenham
Is Long Wittenham within the area you cover?
Yes. Long Wittenham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Appleford station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Should I point up the gap in my brickwork?
No. Rigid materials cannot move with the wall and the joint fails. Where a joint has been mortared, it can often be raked out and sealed properly.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How do you reach high-level joints?
Each building is different. Send us photos and a rough idea of the height.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.