Oxfordshire · England
External Mastic in Middle Aston
Sealing brickwork movement joints, render, cladding and façade joints for Middle Aston, backed by a one-year guarantee. Call for a quick quote.
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
Looking after it afterwards
Looking after new joints is easy:
- Check the sealant is paintable before painting near it
- Deal with leaking gutters that soak the joints below
- Make sure movement joints aren’t pointed over
- Check external joints each spring
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
About our external mastic in Middle Aston
For buildings in Middle Aston, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. If you’re dealing with cracked joints where brick meets render or frames and joints with sealant missing in places, we can help.
External sealant needs dry, clean surfaces, so work around Middle Aston is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Middle Aston (OX25)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email and we’ll talk you through it.
What to tell us for a quote
To make quoting easier, let us know:
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- Roughly how big the job is
If you’re in Middle Aston and need external mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Your questions about external mastic in Middle Aston
Do you work for landlords with property near Heyford station?
Yes. We work for landlords and letting agents as well as homeowners. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Is Middle Aston within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Is there a guarantee?
Yes: twelve months. If anything is not right with the work within the year, let us know and we’ll sort it.
How long does external mastic take?
That depends on the amount of work, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We will give you a better idea when we quote.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
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.
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap and keep the sealant to the right depth.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Tell us what the building has when you get in touch.
Landlords, agents and businesses in Middle Aston
If you manage several properties in or around Middle Aston, several properties can be quoted together. Just tell us the addresses and what each one needs.
Landlords and agents in Middle Aston can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
Places near Middle Aston
More services for Middle Aston
What external mastic looks like in Middle Aston
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Dr Radcliffe's Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near Heyford station, outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Church of St Peter and St Paul, an extension built onto an older house moves differently, and the joint between them takes the strain.
Middle Aston is about 7 miles west of Bicester, in Oxfordshire. Across the OX25 area, our applicators can take on external mastic. Middle Aston is one of 443 places in Oxfordshire where we work. You can also see our page for Oxford, roughly 13 miles from Middle Aston.
Work in OX25 works the same way as everywhere else we cover. If you are just outside Middle Aston, we cover Steeple Aston (1 mile south), North Aston (1 mile north), Duns Tew (1 mile north-west), Dane Hill (2 miles north) and Steeple Barton (2 miles south-west). We also work in nearby towns such as Oxford (13 miles south), Banbury (9 miles north), Bicester (7 miles east), Witney (13 miles south-west), Kidlington (8 miles south) and Headington Quarry (13 miles south).
Local landmarks in Middle Aston
In Middle Aston, that means homes and buildings near Red Lion pub, among other places. Middle Aston’s nearest station is Heyford station, roughly 1.5 miles south. Nearby you’ll also find Deddington Castle (2.9 miles north).
What happens on the day
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. Somewhere as small as Middle Aston, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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.
Preparing for the visit
- Clear the area around the work
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
How to get a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.