Oxfordshire · England
External Mastic in Charney Bassett
External mastic across Charney Bassett and nearby, with old sealant always removed completely.
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
External mastic in Charney Bassett
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on concrete & block, joints between brick and frames and render & cladding joints, and the jobs we see most are old sealant gone brittle and cracked and joints pointed up with cement by mistake.
In a village or hamlet like Charney Bassett, older cottages and farm buildings often stand in the open, 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.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Where
- Charney Bassett (OX12)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Charney Bassett questions
Is Charney Bassett within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Charney Bassett in your area for external mastic?
Yes. Our work covers London and the South East, and Charney Bassett is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
How long does external mastic take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. We’ll confirm how long when we quote.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or drop us an email.
Are you fully insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Aftercare tips
So the new joints stay in good condition:
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
- Clear growth from the base of walls and joints
- Keep high-pressure jets off the joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the building. In a small place like Charney Bassett, access is generally 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.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or send us an email.
Related advice
Common problems we fix in Charney Bassett
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Any of these means the joints need attention:
- Joints where the bead has come unstuck
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Damp patches traced to an open external joint
For an older house near a landmark such as Church of St Peter, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- Who does the work, and how experienced they are
- What insurance they hold
- What happens if the job turns out different
- How the colour is chosen
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Walls and rooflines in Charney Bassett
With historic houses such as Longworth House (about 2.9 miles north) nearby, there’s older building stock in the area around Charney Bassett as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
In and around Charney Bassett, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Charney Bassett is about 4 miles north of Wantage, in Oxfordshire. We provide external mastic to householders, landlords and businesses in Charney Bassett, as part of our work across Oxfordshire. Our Oxfordshire coverage runs to 443 places, and Charney Bassett is one of them. Oxford is on our list too, about 12 miles from Charney Bassett.
Work in OX12 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Main Street, Buckland Road and New Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Lyford (1 mile east), Denchworth (2 miles south), Pusey (2 miles north-west), West Hanney (2 miles south-east) and Goosey (2 miles south-west). Within a short drive, we also cover Oxford (12 miles north-east), Didcot (9 miles east), Abingdon-on-Thames (8 miles east), Witney (10 miles north), Carterton (10 miles north-west) and Wantage (4 miles south).
What’s near Charney Bassett
We work in homes and buildings around The Chequers pub and the streets around them. A little further out are Longworth Hospital (5.7 miles west) and Hinton Waldrist Castle (2.7 miles north). The countryside around Charney Bassett includes Chain Hill.
Why it’s worth doing now in Charney Bassett
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, rather than the wall around it. In a small place like Charney Bassett, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Why book with us
- White, clear, grey or another colour, product permitting
- Homes, businesses and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
- Approved under the ARBOMaster scheme
What the job involves on each surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible year round.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Tell us what the building has when you get in touch.