Oxfordshire · England
Bladon External Mastic
External mastic in Bladon from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Bladon
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. If you have weathered mastic that no longer stretches and movement joints with cracked, split or missing sealant, we can put it right, on joints between brick and frames, façade panels and brickwork movement joints alike.
Somewhere as small as Bladon, homes and farm buildings often face open ground, 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.
Big or small, it’s backed by our 12-month guarantee in Bladon and across Oxfordshire.
- Location
- Bladon (OX20)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Bladon
Do you cover Bladon for external mastic?
Yes. We work across London and the South East, and Bladon is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
I let a flat near Hanborough station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before resealing.
How long does external mastic take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. Your quote will say how long we expect yours to take.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Also in Bladon
Walls and rooflines in Bladon
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 Blenheim Palace (about 0.9 miles north-west) are a reminder that the area around Bladon 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.
Letting a property close to Hanborough station? Then split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near St Martin's Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Bladon is about 7 miles north-east of Witney, in Oxfordshire. For external mastic in and around Bladon, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Oxfordshire from our Crawley base. Across Oxfordshire, we cover 443 places, Bladon among them. For nearby work, see our Oxford page, about 7 miles away.
Here we cover the OX20 postcode area for external mastic. You’ll find streets such as The Green, Park Street and Lamb Lane. Nearby, we also carry out external mastic in Woodstock (1 mile north), Begbroke (1 mile east), Church Hanborough (2 miles south-west), Long Hanborough (2 miles west) and Thrupp (2 miles east). Larger places within reach include Oxford (7 miles south-east), Bicester (10 miles north-east), Abingdon-on-Thames (11 miles south), Witney (7 miles south-west), Carterton (11 miles south-west) and Kidlington (3 miles east).
Local landmarks in Bladon
Locally, jobs take us to homes and businesses close to The White House and The Marlborough Church of England School, among other places. Bladon’s nearest station is Hanborough station, about 1 mile west of the centre. A little further out are Oxford Bus Museum (1 mile west). Open spaces near Bladon include Hook Meadow and The Trap Grounds.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Make sure movement joints are not pointed over
- Keep water from gutters off the wall
- Point out the joints to other trades
- Check external joints each spring
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
Do you need external mastic in Bladon?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Any of these means the joints need attention:
- Panel joints letting water in
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
- Joints with sealant missing in places
For site and facilities teams at buildings such as Bladon Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Whether they’re fully insured
- What product goes in the joint
- What happens if they find a problem under the old sealant
- What preparation is included
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the problem grows beyond the joint itself. In a small place like Bladon, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit is generally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why us?
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
- A sealant colour to suit the surroundings
- We never seal over old sealant
See our cost guide or what customers say.
Different surfaces, different methods
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
Landlords, agents and businesses in Bladon
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How it works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Bladon needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.