Oxfordshire · England
External Mastic in Shorthampton
External mastic for Shorthampton, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Leaking joints around cladding and façade panels
- Failed seals between different materials
- Water getting into walls through failed joints
Surface by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best.
External mastic in Shorthampton, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. If you have damp patches traced to an open external joint and cracked joints where brick meets render or frames, we can help, whatever the surface.
In a village or hamlet like Shorthampton, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Place
- Shorthampton (OX7)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Shorthampton
Other services in Shorthampton
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
- Make sure movement joints aren’t pointed over
- Get split or bare joints resealed while the damage is small
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
How the visit works
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It normally takes anything from a few hours to several days, depending on the building. In a small place like Shorthampton, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- 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.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
How to get a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Advice
Landlord and commercial work in Shorthampton
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
DIY versus a professional 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.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Why act early in Shorthampton
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like Shorthampton, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why Shorthampton clients choose us
- Homes, businesses and hotels
- Tidy, careful work
- Colour picked to suit the job
- Fully insured
Take a look at how sealant jobs are priced or what customers say.
External mastic in Shorthampton: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Charlbury station, outside joints that have cracked can let damp into a rental, so check them between lets.
Shorthampton is about 6 miles north of Witney, in Oxfordshire. We provide external mastic to homeowners, landlords and businesses in Shorthampton. Our area takes in 443 places across Oxfordshire, from the larger towns to small villages. We also work in Oxford, around 15 miles away.
Every address in OX7 is covered for external mastic, from the main roads to the quietest streets. Close by, we work in Chilson (1 mile south-west), Chadlington (1 mile north), Ascott-under-Wychwood (2 miles south-west), Ascott d'Oyley (2 miles south-west) and Ascott Earl (2 miles south-west). We also work in nearby towns such as Oxford (15 miles south-east), Banbury (15 miles north-east), Witney (6 miles south), Carterton (8 miles south), Kidlington (11 miles east) and Chipping Norton (4 miles north).
What’s near Shorthampton
Shorthampton’s nearest station is Charlbury station, roughly 1.5 miles east of the centre. Green spaces nearby include Blenheim Farm.
When to call us in Shorthampton
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Common reasons people contact us are:
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
If you live in an older home near Church of All Saints, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before booking
- What preparation is included
- Whether all the old sealant comes out first
- Is VAT in the price?
- What happens if the job turns out different
Your questions about external mastic in Shorthampton
Can you help a landlord with a rental near Charlbury station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can you do external mastic in Shorthampton?
Yes. We work across London and the South East, and Shorthampton is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working. We will reseal it with a flexible sealant.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What information do you need?
Let us know what needs doing and where, plus pictures if you have them. We’ll ask anything else we need to know.