Oxfordshire · England
External Mastic in South Newington
Problem with your movement joints in South Newington? We cut out the old, prepare the joints and apply the right sealant.
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Moss and dirt in joints with no sealant left
External mastic for homes and businesses in South Newington
Movement joints let brickwork, render and cladding expand and shrink without cracking. 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. We’re often asked to deal with rigid filler in a joint that should flex and plants rooting in failed movement joints, across brickwork movement joints, joints between brick and frames and render & cladding joints.
Outside joints can only be sealed when they’re dry, so work in South Newington is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- South Newington (OX15)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of external mastic
Your quote is based on your job. We look at:
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- How many areas need sealing
- Whether there’s mould to deal with
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear quote before any work starts.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it’s a home or a business
- Photos by email, if that’s easy
- The rough size of the job
- What’s wrong with the joints now
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Signs you need external mastic in South Newington
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The problems people generally mention when they call include:
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Rain getting behind render or cladding at a joint
Around South Newington, as everywhere, external mastic is only as good as the preparation behind it.
Comparing quotes
- What preparation is included
- Is the old sealant removed completely?
- What the cure time is
- Are they insured?
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around South Newington can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why us?
- Rated 4.9 stars on Google
- Old sealant always removed completely
- Over 20 years’ experience
- One-year guarantee on every job
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Keep high-pressure jets off the joints
- Clear growth from the base of walls and joints
- Check external joints each spring
- Show decorators and builders where the movement joints are
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Towns and villages near South Newington
More services for South Newington
External mastic in South Newington: local notes
With historic houses such as Broughton Castle (about 3.1 miles north) nearby, there’s older building stock in the area around South Newington 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around St Peter ad Vincula, an extension built onto an older house moves differently, and the joint between them takes the strain.
South Newington is about 5 miles south-west of Banbury, in Oxfordshire. We carry out external mastic for homes and businesses in South Newington and the surrounding area. South Newington is one of 443 towns and villages in Oxfordshire where we work for external mastic. Our Oxford page covers work nearby.
We cover every part of OX15 for external mastic. Streets in the area include High Street, Sands Lane and Green Lane. Nearby, we also carry out external mastic in Wigginton (1 mile west), Swerford (2 miles south-west), Great Tew (3 miles south), Little Tew (3 miles south-west) and Hook Norton (3 miles west). Within a short drive, we also cover Banbury (5 miles north-east), Bicester (12 miles south-east), Witney (15 miles south), Kidlington (13 miles south-east), Bure Park (12 miles south-east) and Chipping Norton (7 miles south-west).
Local landmarks in South Newington
In South Newington, that means homes and buildings near The Duck on The Pond pub and the streets around them. Other landmarks nearby include Bloxham Village Museum (2 miles north-east) and Horton General Hospital (5 miles north-east). Not far away are Crouch Hill and Woodford Bottom and Lamb's Pool.
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on how much there is to do. Somewhere as small as South Newington, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
Getting a quote
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
South Newington questions
Is external mastic in South Newington guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Do you cover South Newington for external mastic?
Yes, South Newington is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
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 we start.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint.
How long does external mastic last?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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.
Landlords, agents and businesses in South Newington
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.