Oxfordshire · England
External & façade joints in Upper Arncott, Oxfordshire
We cover Upper Arncott for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Upper Arncott
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. We are often asked to deal with sealant that has lost its bond to the brick or render and moss and dirt in joints with no sealant left, on brickwork movement joints, copings & trims and joints between brick and frames.
Older homes in small places like Upper Arncott may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
All our work is covered by our 12-month guarantee.
- Where
- Upper Arncott (OX25)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
All our tools and materials come with us in the van. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Upper Arncott, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
Advice
Landlords, agents and businesses in Upper Arncott
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Letting agents and landlords in Upper Arncott can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
What affects the cost of external mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Access and height
- Whether there’s mould to deal with
- Any working-time requirements on site
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Nearby places to Upper Arncott
Also in Upper Arncott
Honest limits
New sealant cannot fix everything, and we will tell you before we start. Sealant won’t put right:
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
Why deal with it now?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. In a small place like Upper Arncott, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why us?
- 180+ five-star Google reviews
- A choice of colours where the product allows
- Tidy, careful work
- Anti-fungal sanitary silicone in wet areas
See our cost guide or customer reviews.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Check the sealant is paintable before painting near it
- Keep high-pressure jets off the joints
- Get split or bare joints resealed while the damage is small
- Tell anyone working on the walls about the movement joints
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
External mastic in Upper Arncott: 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 Boarstall Tower (about 2 miles south-east) are a reminder that the area around Upper Arncott 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.
Historic houses such as Boarstall Tower, about 2 miles south-east, show how far back building around Upper Arncott goes. Rented homes near Bicester Village station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Upper Arncott is about 4 miles south-east of Bicester, in Oxfordshire. Anywhere in OX25, we cover external mastic for homes and businesses. Our Oxfordshire coverage runs to 443 places, and Upper Arncott is one of them. For nearby work, see our Oxford page.
Jobs for external mastic in OX25 works the same way as everywhere else we cover. Whether your property is on Hopcraft Close, Murcott Road and Teale Close or a nearby road, we can help. Neighbouring places we cover for external mastic include Lower Arncott (1 mile north), Ambrosden (1 mile north), Murcott (2 miles south-west), Merton (2 miles west) and Fencott (2 miles west). Larger places within reach include Oxford (8 miles south-west), Bicester (4 miles north-west), Abingdon-on-Thames (14 miles south-west), Thame (9 miles south-east), Kidlington (8 miles west) and Chinnor (14 miles south-east).
Local landmarks in Upper Arncott
Around Upper Arncott, our work takes us to homes and buildings near The Plough pub and the streets around them. For rail, the closest station is Bicester Village station, roughly 3.3 miles north-west. Other landmarks nearby include Bicester Community Hospital (3.7 miles north-west) and Bicester Village (3.4 miles north-west). Not far away are Otmoor RSPB reserve and Graven Hill.
Upper Arncott: your questions answered
Can you help a landlord with a rental near Bicester Village station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Can you do external mastic in Upper Arncott?
Yes, Upper Arncott is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.