Oxfordshire · England
External Mastic in Glympton
External mastic across Glympton and nearby, with every bit of old sealant taken out first.
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
- Sealant pulling away from one side of the joint
External mastic in Glympton
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. If you have joints where the bead has come unstuck and weeds or debris growing in open joints, we can put it right, whatever the surface.
Around Glympton, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Glympton (OX20)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Show decorators and builders where the movement joints are
- Get split or bare joints resealed while the damage is small
- Keep soil, plants and ivy away from the joints
- Look over the joints every year, ideally after winter
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
How it works
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. It generally takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Glympton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
Get a quote
Getting a quote is simple: let us know what needs doing and where and its rough size. Photos by email help us understand the job.
Related advice
Your questions about external mastic in Glympton
Can you help a landlord with a rental near Tackley station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Do you cover Glympton for external mastic?
Yes. We work across London and the South East, and Glympton is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Are you insured?
Yes. Full insurance covers our work.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or drop us an email and tell us what needs doing and where.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Failed render or damaged cladding panels
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
Signs you need external mastic in Glympton
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
People usually contact us when they notice something like this:
- Rigid filler in a joint that should flex
- Failed sealant between panels on a façade
- Plants rooting in failed movement joints
- Hard, crazed mastic that has stopped moving
Rented homes near Tackley station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- What happens if the job turns out different
- What the quote includes, VAT included or not
- Whether they’re fully insured
- Whether all the old sealant comes out first
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Surface by surface
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Send us any details you have about the façade.
Glympton buildings and the weather
Historic houses like Blenheim Palace (about 3.5 miles south) are a reminder that the area around Glympton has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
In the older streets around Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Glympton is about 9 miles north-east of Witney, in Oxfordshire. Anywhere in OX20, we cover external mastic for homes and businesses. 443 places in Oxfordshire are on our list, large and small. Our Oxford page covers work nearby.
We cover every part of the OX20 postcode area for external mastic. External mastic is available to properties on New Road and The Row. Nearby, we also carry out external mastic in Wootton (1 mile south-east), Woodstock (3 miles south-east), Tackley (3 miles east), Bunkers Hill (4 miles south-east) and Shipton-on-Cherwell (4 miles south-east). Larger places within reach include Oxford (12 miles south-east), Banbury (12 miles north), Bicester (10 miles east), Abingdon-on-Thames (15 miles south), Witney (9 miles south-west) and Carterton (13 miles south-west).
Near you in Glympton
Around Glympton, our work takes us to homes and buildings near Killingworth Castle pub, among other places. The nearest railway station is Tackley station, about 3.6 miles east. A little further out are Soldiers of Oxfordshire Museum (3.1 miles south). For a walk, there’s Blenheim Farm.
Also near Glympton
What else we do in Glympton
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.