Oxfordshire · England
New Hinksey External Mastic
We cover New Hinksey for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Sealant pulling away from one side of the joint
- Failed sealant between panels on a façade
- Brick movement joints where the sealant has split
External mastic in New Hinksey: local notes
London and the South East are among 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 Holywell Manor (about 1.4 miles north) are a reminder that the area around New Hinksey has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as New Hinksey Church of England Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St John the Evangelist include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
New Hinksey is about 1 mile south-west of Oxford, in Oxfordshire. New Hinksey gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our Oxfordshire coverage runs to 443 places, and New Hinksey is one of them.
Here we cover the OX1 and OX4 postcode area for external mastic. Local streets include Manor Road, Edith Road and Weirs Lane, all of which we cover. If you are just outside New Hinksey, we cover South Hinksey (1 mile south-west), Redbridge (1 mile south), Grandpont (1 mile north-west), Donnington (1 mile east) and Hinksey Hill (1 mile south-west). Within a short drive, we also cover Didcot (9 miles south), Bicester (12 miles north), Abingdon-on-Thames (4 miles south), Witney (11 miles west), Carterton (15 miles west) and Thame (12 miles east).
Around New Hinksey
Locally, jobs take us to homes and businesses close to South Park, Oxford Media & Business School and The Duke of Monmouth pub and the streets around them. Nearby too are Greyfriars Catholic School (1.2 miles east) and Alexander Library of Ornithology (1 mile north). New Hinksey’s nearest station is Oxford station, roughly 1.3 miles north-west of the centre. A little further out are The Story Museum (1 mile north) and Oxford Castle and earlier settlement remains (1.1 miles north). The countryside around New Hinksey includes Hook Meadow and The Trap Grounds and Harcourt Hill.
External mastic in New Hinksey, done properly
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. We work on façade panels, brickwork movement joints and concrete & block, and people most often call us about rain getting behind render or cladding at a joint and movement joints filled with mortar instead of sealant.
Homes around New Hinksey 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.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Where
- New Hinksey (OX1, OX4)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need external mastic in New Hinksey?
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Keep an eye out for any of the following:
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
If you let a flat or house near Oxford station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- What insurance they hold
- Whether you can choose the colour
- What happens if they find a problem under the old sealant
- Whether VAT is included
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Show decorators and builders where the movement joints are
- Fix overflowing gutters above sealed joints
- Ask before painting over external sealant
- Keep high-pressure jets off 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.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
Why deal with it now?
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In a smaller place like New Hinksey, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and agree the price before starting.
What you get with us
- White, clear, grey or coloured to suit, where the product allows
- Approved under the ARBOMaster scheme
- Fully insured
- Domestic, commercial and hotel work
See our cost guide and our reviews.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Questions from New Hinksey
Will you come out to New Hinksey?
Yes, New Hinksey is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Oxford station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
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.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator.
Is there a guarantee?
Yes. Every job comes with a 12-month guarantee.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we will confirm the access.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Also near New Hinksey
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What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours to a few days, depending on the length of joint and the access. A visit to New Hinksey is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Read more
Landlord and commercial work in New Hinksey
Housing providers, facilities teams and property managers book us too in New Hinksey and across Oxfordshire. We can quote a run of properties together, and we are fully insured.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.