Oxfordshire · England
Wendlebury External Mastic
External mastic across Wendlebury and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Sealant pulling away from one side of the joint
External mastic in Wendlebury, done properly
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on concrete & block, copings & trims and joints between brick and frames, and common reasons people get in touch are moss and dirt in joints with no sealant left and cracked joints where brick meets render or frames.
Somewhere as small as Wendlebury, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months.
- Where
- Wendlebury (OX25)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
Water gets in through a failed movement joint and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Around Wendlebury, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That is why we ask about the job first.
Why Wendlebury customers choose us
- We agree the colour with you first
- Experience in homes, commercial sites and hotels
- Every job guaranteed for a year
- Colour picked to suit the job
Take a look at what affects the cost and our reviews.
Wendlebury: your questions answered
Is Wendlebury within the area you cover?
Yes, Wendlebury is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Bicester Village station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or send us an email.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Where are you based?
Mr Mastic is based in Crawley. We cover Wendlebury and the rest of Oxfordshire.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Do you need external mastic in Wendlebury?
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Brick movement joints where the sealant has split
For an older house near a landmark such as Church of St Giles, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- Whether the sealant suits the joint
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap and keep the sealant to the right depth.
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Check external joints each spring
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
- Get split or bare joints resealed while the damage is small
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
External mastic in Wendlebury: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Bicester Village station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Wendlebury is about 2 miles south-west of Bicester, in Oxfordshire. Every kind of property in Wendlebury is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our Oxfordshire coverage runs to 443 places, and Wendlebury is one of them. Oxford is on our list too, around 9 miles away.
Postcode districts we cover here for external mastic: OX25. We cover properties on Church Lane, St Giles Close and Rectory Close and the roads around them. Other places close to Wendlebury include Chesterton (1 mile north), Merton (2 miles south-east), Fencott (2 miles south-east), Charlton-on-Otmoor (2 miles south) and Ambrosden (3 miles east). Within a short drive, we also cover Oxford (9 miles south), Banbury (15 miles north-west), Abingdon-on-Thames (14 miles south), Witney (14 miles south-west), Thame (13 miles south-east) and Kidlington (6 miles south-west).
Around Wendlebury
We work in homes and buildings around The Red Lion Public House and the streets around them. The nearest railway station is Bicester Village station, roughly 2.1 miles north-east of the centre. Nearby you’ll also find Bicester Community Hospital (2 miles north-east) and Ardley Castle (4.9 miles north). For a walk, there’s Woodsides Meadow and Graven Hill.
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. In a small place like Wendlebury, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
- Clear the area around the work
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
Advice
Places near Wendlebury
More services for Wendlebury
Landlords, agents and businesses in Wendlebury
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Façade panels