Oxfordshire · England
External & façade joints in Garsington, Oxfordshire
External mastic in Garsington from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
About our external mastic in Garsington
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. If you’re dealing with weeds or debris growing in open joints and sealant that has lost its bond to the brick or render, we can put it right, on render & cladding joints, concrete & block and joints between brick and frames alike.
Older homes in small places like Garsington may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
Your job is guaranteed for a year, as with all our work.
- Place
- Garsington (OX44)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Render that is blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before you book.
Surfaces we seal
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Façade panels
What else we do in Garsington
How we quote for external mastic
We don’t publish a price list. What we look at:
- Any working-time requirements on site
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What to tell us for a quote
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- The rough size of the job
- Whether it has been sealed before
- Where the property is
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Looking after it afterwards
After the cure time, these simple habits help:
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
- Ask before painting over external sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to several days, depending on the building from start to finish. Somewhere like Garsington needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
Get a quote
There’s no standard price list. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or email us.
Advice
Questions from Garsington
Do you work for landlords with property near Radley station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you cover Garsington for external mastic?
Yes, Garsington is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
How do you reach high-level joints?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
Will the new joint stand out?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before we start.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a small place like Garsington, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and send you a clear quote before any work starts.
Why Garsington clients choose us
- Sealant colour chosen to suit
- Homes, businesses and hotels
- Full insurance on every job
- An ARBOMaster approved applicator
What external mastic looks like in Garsington
With historic houses such as Garsington Manor (about 0.6 miles south-east) nearby, there’s older building stock in the area around Garsington as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Garsington Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For an older house near a landmark such as Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant. For landlords with property near Radley station, outside joints that have cracked can let damp into a rental, so check them between lets.
Garsington is about 4 miles south-east of Oxford, in Oxfordshire. Every kind of property in Garsington is covered for external mastic. Every job comes with our one-year guarantee. Garsington is one of 443 places in Oxfordshire where we work.
Work in OX44 works the same way as everywhere else we cover. Whether your property is on Oxford Road, Combewell and Hazel End or anywhere close by, our applicators can take on the job. We also cover Blenheim (1 mile east), Denton (1 mile east), Horspath (1 mile north), Cuddesdon (2 miles east) and Littleworth (2 miles north). Larger places within reach include Oxford (4 miles north-west), Didcot (8 miles south-west), Bicester (13 miles north), Abingdon-on-Thames (6 miles south-west), Witney (15 miles west) and Thame (9 miles east).
Around Garsington
We work in homes and buildings around Red Lion pub, The Oxford Academy and Library Farmhouse. The closest station to Garsington is Radley station, about 3.8 miles south-west. Well-known places in the area include NHS Oxfordshire Clinical Commissioning Group (1.9 miles north-west) and British Tattoo History Museum (2.9 miles north-west). The countryside around Garsington includes Shotover and CS Lewis Nature Reserve.
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.