Oxfordshire · England
External & façade joints in Charlton, Oxfordshire
Movement joints in Charlton need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Failed sealant between panels on a façade
Your questions about external mastic in Charlton
Do you cover smaller places like Charlton?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Charlton in your area for external mastic?
Yes, Charlton is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can a movement joint be filled with mortar?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. A flexible sealant is the right fill.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Can you do several jobs on one visit?
Of course. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. If we need more, we’ll ask.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
External mastic for homes and businesses in Charlton
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. If you’re dealing with brick movement joints where the sealant has split and failed seals between different materials, we can help.
Homes around Charlton range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Charlton (OX12)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of external mastic
The price is agreed before any work begins. It’s based on:
- How many rooms, windows or areas are involved
- The number and length of the joints
- Any mould that needs treating
- How easy the joints are to reach
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap so the sealant isn’t too deep.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
What we can’t put right
Before you book, it’s worth knowing the limits:
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Charlton
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Façade panels
- Concrete & block
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In a smaller place like Charlton, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Full insurance on every job
- Domestic, commercial and hotel work
- Colour picked to suit the job
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced and customer reviews.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
How the visit works
We keep the work tidy and contained to the joints we’re treating. 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. In a smaller place like Charlton, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention any tricky access
- Let us know about earlier repairs to the joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Advice
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Clear growth from the base of walls and joints
- Act on the first splits you see
- Fix overflowing gutters above sealed joints
- Keep movement joints as flexible joints, not mortar
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
Places near Charlton
Also in Charlton
Walls and rooflines in Charlton
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.
Schools such as Charlton Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Holy Trinity Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Charlton is about 7 miles west of Didcot, in Oxfordshire. For external mastic in and around Charlton, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Oxfordshire from our Crawley base. Across Oxfordshire, we cover 443 places, and Charlton is one of them. Oxford is on our list too, about 13 miles from Charlton.
We cover every part of OX12 for external mastic. Whether your property is on Grove Road, Little Lane and Ormond Road or a nearby road, we can help. Being close to the A417, Charlton is easy for our applicators to reach for external mastic. Neighbouring places we cover for external mastic include Wantage (1 mile west), East Challow (2 miles west), Letcombe Regis (2 miles south-west), West Challow (2 miles west) and Childrey (3 miles west). Within a short drive, we also cover Oxford (13 miles north-east), Didcot (7 miles east), Abingdon-on-Thames (8 miles north-east), Witney (14 miles north), Carterton (14 miles north-west) and Faringdon (8 miles north-west).
Around Charlton
Typical jobs here are in homes near Lord Nelson pub, King Alfred's and St Mary's School, among other places. Well-known places in the area include Williams F1 Grand Prix Collection (1.8 miles north). For a walk, there’s Letcombe Valley and Chain Hill.