Oxfordshire · England
Poundon External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Poundon. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
External mastic in Poundon
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you are dealing with weathered mastic that no longer stretches and cracked joints where brick meets render or frames, we can help, whatever the surface.
In a village or hamlet like Poundon, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
All our work is covered by our 12-month guarantee, wherever you are in Oxfordshire.
- Place
- Poundon (OX27)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. The work normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Poundon 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.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or send us an email with the details and send pictures if you have them.
Related advice
FAQs for Poundon
Can you help a landlord with a rental near Bicester North station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Is Poundon in your area for external mastic?
Yes. We work across London and the South East, and Poundon is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
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.
Can you reach joints on upper floors?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Tell us about the building and we’ll confirm what access is needed.
Is there a guarantee?
Yes, always. Each job is guaranteed for twelve months, wherever you are.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Are you fully insured?
Yes. Mr Mastic is fully insured.
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Fix overflowing gutters above sealed joints
- Ask before painting over external sealant
- Keep movement joints as flexible joints, not mortar
- Act on the first splits you see
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint cannot move, the wall finds another way, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
How we quote for external mastic
You will get a clear quote before we start. It’s based on:
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- How easy the joints are to reach
- When we can work, for business premises
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Pictures of the joints, sent by email
- Where the property is
Getting a quote is simple: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Different surfaces, different methods
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant.
For landlords and businesses
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured for the work.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
When to call us in Poundon
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
The problems people normally mention when they call include:
- Old sealant gone brittle and cracked
- Cracked joints where brick meets render or frames
- Panel joints letting water in
- Sealant pulling away from one side of the joint
If you let a flat or house near Bicester North station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- What guarantee comes with the work
- Who does the work, and how experienced they are
Also near Poundon
What else we do in Poundon
Walls and rooflines in Poundon
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Claydon House (about 4.5 miles east) are a reminder that the area around Poundon has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Historic houses such as Claydon House, about 4.5 miles east, show how far back building around Poundon goes.
Poundon is about 4 miles east of Bicester, in Oxfordshire. We provide external mastic to homes and businesses in Poundon and the surrounding area. Across Oxfordshire, we cover 443 places, and Poundon is one of them. We also work in Oxford, around 14 miles away.
We work across the OX27 postcode area for external mastic and the streets around it. Other places close to Poundon include Twyford (1 mile north-east), Marsh Gibbon (2 miles south), Charndon (2 miles south-east), Calvert (3 miles east) and Preston Bissett (3 miles north). Within a short drive, we also cover Oxford (14 miles south-west), Bicester (4 miles west), Thame (13 miles south), Kidlington (12 miles south-west), Headington Quarry (13 miles south-west) and Bure Park (4 miles west).
What’s near Poundon
Typical jobs here are in homes near The Sow and Pigs pub. For rail, the closest station is Bicester North station, about 4.1 miles west of the centre. Well-known places in the area include Bicester Community Hospital (4.6 miles south-west). Open spaces near Poundon include Graven Hill and Calvert Jubilee.