Oxfordshire · England
External Mastic in Shillingford
External mastic in Shillingford from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
External mastic in Shillingford, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We work on brickwork movement joints, façade panels and joints between brick and frames, and the jobs we see most are joints pointed up with cement by mistake and hard, crazed mastic that has stopped moving.
Somewhere as small as Shillingford, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Place
- Shillingford (OX10)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
After the cure time, these simple habits help:
- Act on the first splits you see
- Ask before painting over external sealant
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
Landlord and commercial work in Shillingford
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Places near Shillingford
More services for Shillingford
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the amount of work. Somewhere like Shillingford needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- 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.
How to prepare
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
What external mastic looks like in Shillingford
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Brightwell Manor (about 1.8 miles south-west) nearby, there’s older building stock in the area around Shillingford as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For site and facilities teams at buildings such as St Laurence Church of England (A) School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Lawrence include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Cholsey station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Shillingford is about 5 miles east of Didcot, in Oxfordshire. We carry out external mastic for householders, landlords and businesses in Shillingford and nearby. Shillingford is one of 443 towns and villages in Oxfordshire we cover. Our Oxford page covers work nearby, about 9 miles away.
Postcode districts we cover here for external mastic: OX10. That includes homes and businesses on Warborough Road, New Road and Hartley Close. Neighbouring places we cover for external mastic include Warborough (1 mile north), Dorchester (1 mile north-west), Brightwell-cum-Sotwell (1 mile south-west), Benson (2 miles south-east) and Berrick Salome (2 miles north-east). Further out, we also cover Oxford (9 miles north-west), Didcot (5 miles west), Abingdon-on-Thames (7 miles north-west), Thame (11 miles north-east), Wantage (13 miles west) and Henley-on-Thames (12 miles south-east).
Landmarks near Shillingford
Typical jobs here are in homes near The Six Bells Inn and Wallingford School and the streets around them. Shillingford’s nearest station is Cholsey station, about 4.3 miles south of the centre. Other landmarks nearby include Aston Martin Heritage Trust Museum (1.9 miles north) and Brightwell Castle (1.7 miles south-west). Green spaces nearby include Ewelme Watercress Beds and Wittenham Clumps.
What the job involves on each surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that isn’t coming from the joint
- Adding movement joints to masonry that has none
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Where we work in Shillingford
- Joints between brick and frames
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
Your questions about external mastic in Shillingford
I let a flat near Cholsey station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is Shillingford in your area for external mastic?
Yes, Shillingford is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. Your quote will say how long we expect yours to take.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
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 so it can flex with the joint.
What affects the cost of external mastic
Your quote is based on your job. We take into account:
- The amount of work
- Working hours on commercial sites
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What to tell us for a quote
To make quoting easier, let us know:
- The problem you’ve noticed
- Roughly how big the job is
- If someone has resealed it before
- Where the job is, and your postcode
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.