Oxfordshire · England
External & façade joints in Appleford-on-Thames, Oxfordshire
Professional external mastic in and around Appleford-on-Thames, with every bit of old sealant taken out first.
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
- Panel joints letting water in
What the job involves on each surface
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly.
How we handle external mastic in Appleford-on-Thames
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. If you have joints pointed up with cement by mistake and moss and dirt in joints with no sealant left, we can help.
Around Appleford-on-Thames, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Location
- Appleford-on-Thames (OX14)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we’re called out for in Appleford-on-Thames
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Common reasons people contact us are:
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
In the older streets around Church of St Peter and St Paul, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- Is VAT in the price?
- The length of the guarantee
- How long to leave it before use
- How the surfaces are prepared before sealing
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Have failed joints looked at early
- Check the sealant is paintable before painting near it
- Keep high-pressure jets off the joints
- Walk round the building once a year and look at the joints
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Towns and villages near Appleford-on-Thames
Other services in Appleford-on-Thames
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Appleford-on-Thames can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why us?
- Approved under the ARBOMaster scheme
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- Colour picked to suit the job
See our cost guide or what customers say.
The process
The work is kept neat and contained to the joints we are treating, so you can get on with your day. Expect the work to take a few hours for a handful of joints, longer for a whole elevation, and we explain the cure time before we leave. Somewhere as small as Appleford-on-Thames, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
- Keep pets and children clear of the area while we work
Getting a quote
If you are in Appleford-on-Thames and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Advice
Appleford-on-Thames: your questions answered
Is Appleford-on-Thames within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Appleford station?
Yes. We work for landlords and 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.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
Do you work at height?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Give us some details and we’ll confirm the access.
Where do you work from?
Mr Mastic is based in Crawley. We cover Appleford-on-Thames and the rest of Oxfordshire.
Do you use backing rod?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
What we cannot put right
We will not take on work that will not last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Subsidence or other structural problems
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Appleford-on-Thames
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
External mastic in Appleford-on-Thames: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Clifton Hampden Manor (about 1.9 miles north-east) are a reminder that the area around Appleford-on-Thames has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Letting a property close to Appleford station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. Managing a site like Didcot Girls' School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Appleford-on-Thames is about 2 miles north of Didcot, in Oxfordshire. We provide external mastic to homeowners, landlords and businesses in Appleford-on-Thames and the surrounding area, as part of our work across Oxfordshire. Across Oxfordshire, we cover 443 places, and Appleford-on-Thames is one of them. For nearby work, see our Oxford page (8 miles or so).
We work across OX14 for external mastic and the streets around it. If you need external mastic at a property on Chambrai Close, Church Street and Main Road or a nearby road, we can help. Nearby, we also carry out external mastic in Long Wittenham (1 mile east), Culham (1 mile north-west), Sutton Courtenay (2 miles west), Clifton Hampden (2 miles north-east) and Didcot (2 miles south). Within a short drive, we also cover Oxford (8 miles north), Abingdon-on-Thames (3 miles north-west), Witney (15 miles north-west), Thame (14 miles north-east), Wantage (8 miles south-west) and Grove (8 miles west).
What’s near Appleford-on-Thames
We work in homes and buildings around Carpenters Arms. There’s a railway station in Appleford-on-Thames itself: Appleford station. Other landmarks nearby include Pendon Museum (1 mile east) and FitzHarris Castle (3.1 miles north-west). For a walk, there’s Mowbray Fields and Wittenham Clumps.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.